feat: cover retry backfill + admin force-resync for manga & chapter (0.50.0)

Adds a per-tick cover-backfill pass to the crawler daemon so mangas whose
cover download failed on first attempt get retried — the metadata pass's
early-stop optimisation otherwise prevents the walk from revisiting them.

Adds admin-only POST /admin/mangas/:id/resync and POST /admin/chapters/:id/resync
that refetch metadata + cover (or chapter content with force_refetch) from the
crawler source synchronously and return the refreshed row. Surfaced in the
UI as "Force resync" buttons on the manga detail and reader pages,
admin-only via session.user.is_admin.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.example

@@ -74,6 +74,10 @@ CRAWLER_DOWNLOAD_ALLOWLIST=
 CRAWLER_ALLOW_ANY_HOST=false
 # Hard cap on a single image body. Default 32 MiB.
 CRAWLER_MAX_IMAGE_BYTES=33554432
+# Max manga detail fetches per metadata pass (both the in-process daemon
+# and the `bin/crawler` CLI). 0 means no cap — let the source walker run
+# to completion. Useful for capped test runs against a new source.
+CRAWLER_LIMIT=0
 # Path to a system Chromium binary. When set, the crawler skips the
 # bundled-fetcher download. Required on platforms without a usable
 # upstream Chromium build (notably Linux_arm64 / Raspberry Pi). On
@@ -83,6 +87,43 @@ CRAWLER_MAX_IMAGE_BYTES=33554432
 # the image actually contains the binary.
 CRAWLER_CHROMIUM_BINARY=
 
+# ----- Crawler TOR proxy + recircuit -----
+# The compose stack ships a `tor` service (dockurr/tor) and defaults
+# CRAWLER_PROXY to it, so by default all crawler traffic exits via the
+# TOR network. To opt out, set CRAWLER_PROXY= (empty) AND
+# CRAWLER_TOR_CONTROL_URL= (empty) below — the tor service can stay
+# running, it just won't be used.
+#
+# Going through TOR adds latency to every fetch; image downloads in
+# particular slow noticeably. The win is on sites that rate-limit or
+# fingerprint by exit IP — NEWNYM recirculation makes a fresh exit
+# cheap to reach for.
+#
+# CRAWLER_PROXY: SOCKS5(h) URL. Use `socks5h://` (not `socks5://`) so
+# DNS resolution also goes through TOR, avoiding leaks via the host's
+# resolver. Leave unset to talk to the upstream directly.
+CRAWLER_PROXY=socks5h://tor:9050
+# Control-port URL for SIGNAL NEWNYM ("get a fresh circuit"). Triggered
+# automatically on bad pages (broken-page body, missing #logo) and on
+# the Unauthenticated session probe outcome. Leave unset to disable
+# the recircuit feature (the SOCKS proxy still works).
+CRAWLER_TOR_CONTROL_URL=tcp://tor:9051
+# Max NEWNYM-and-retry cycles per recircuit-eligible failure. Default 3.
+CRAWLER_TOR_RECIRCUIT_MAX_ATTEMPTS=3
+
+# ----- TOR control-port password -----
+# Shared between the bundled dockurr/tor service (which hashes it into
+# its HashedControlPassword) and the backend's
+# CRAWLER_TOR_CONTROL_PASSWORD. REQUIRED — docker-compose.yml fails
+# fast if absent. Generate a strong random string; rotate by setting
+# a new value and restarting both `tor` and `backend`.
+#
+# Operators running their own non-dockurr tor daemon with cookie-file
+# auth can ignore this var and instead set
+# CRAWLER_TOR_CONTROL_COOKIE_PATH on the backend — the TorController
+# prefers cookie when both are present.
+TOR_CONTROL_PASSWORD=change-me-to-a-strong-random-string
+
 # ----- Frontend -----
 # The frontend container runs SvelteKit's Node adapter on :3000 and
 # proxies /api/* to BACKEND_URL via src/hooks.server.ts. In compose the

.gitea/workflows/deploy.yml

@@ -10,8 +10,6 @@ on:
 jobs:
   test-backend:
     runs-on: ubuntu-latest
-    container:
-      image: rust:1-slim
     services:
       postgres:
         image: postgres:16-alpine
@@ -28,10 +26,18 @@ jobs:
       DATABASE_URL: postgres://mangalord:mangalord@postgres:5432/mangalord
     steps:
       - uses: actions/checkout@v4
-      - name: Install build deps
+      # ubuntu-latest has node (so JS actions like checkout/cache run) but no
+      # Rust. We intentionally avoid `container: rust:1-slim` because act_runner
+      # runs JS actions with node *inside* the job container, and the slim Rust
+      # image ships no node (checkout would fail with exit 127).
+      - name: Install Rust + build deps
         run: |
-          apt-get update
+          set -eu
-          apt-get install -y --no-install-recommends pkg-config libssl-dev ca-certificates
+          SUDO=""; [ "$(id -u)" = "0" ] || SUDO="sudo"
+          $SUDO apt-get update
+          $SUDO apt-get install -y --no-install-recommends pkg-config libssl-dev ca-certificates curl
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain stable
+          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"
       - name: Cache cargo registry and target
         uses: actions/cache@v4
         with:
@@ -66,9 +72,17 @@ jobs:
     runs-on: ubuntu-latest
     needs: [test-backend, test-frontend]
     # PRs only run the test jobs; build + deploy are reserved for
-    # post-merge pushes to main. Without this gate every PR would push
+    # post-merge pushes to main.
-    # a tagged image to the registry and SSH-deploy to prod.
     if: github.event_name != 'pull_request'
+    # Build on the host docker daemon directly (docker-outside-of-docker):
+    # the runner shares the deploy host's daemon, so a plain `docker build`
+    # reuses the host's layer cache and avoids buildx's docker-container
+    # driver + the gha cache exporter — neither works against this single-host
+    # act_runner, and there is no in-job daemon socket unless we mount it.
+    container:
+      image: docker.gitea.com/runner-images:ubuntu-latest
+      volumes:
+        - /var/run/docker.sock:/var/run/docker.sock
     outputs:
       image_tag: ${{ steps.meta.outputs.image_tag }}
       version: ${{ steps.meta.outputs.version }}
@@ -87,48 +101,32 @@ jobs:
           echo "image_tag=${GITHUB_SHA}" >> "$GITHUB_OUTPUT"
           echo "version=${version}" >> "$GITHUB_OUTPUT"
 
-      - uses: docker/setup-buildx-action@v3
+      - name: Build & push backend + frontend
-
+        env:
-      - name: docker login
+          REGISTRY_URL: ${{ secrets.REGISTRY_URL }}
-        uses: docker/login-action@v3
+          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
-        with:
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
-          registry: ${{ secrets.REGISTRY_URL }}
+          IMAGE_TAG: ${{ steps.meta.outputs.image_tag }}
-          username: ${{ secrets.REGISTRY_USERNAME }}
+          VERSION: ${{ steps.meta.outputs.version }}
-          password: ${{ secrets.REGISTRY_PASSWORD }}
+        run: |
-
+          set -eu
-      - name: Build & push backend
+          echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY_URL" -u "$REGISTRY_USERNAME" --password-stdin
-        uses: docker/build-push-action@v5
+          for svc in backend frontend; do
-        with:
+            img="$REGISTRY_URL/mangalord-$svc"
-          context: ./backend
+            docker build -t "$img:$IMAGE_TAG" -t "$img:latest" -t "$img:$VERSION" "./$svc"
-          push: true
+            for tag in "$IMAGE_TAG" latest "$VERSION"; do docker push "$img:$tag"; done
-          tags: |
+          done
-            ${{ secrets.REGISTRY_URL }}/mangalord-backend:latest
+          docker logout "$REGISTRY_URL"
-            ${{ secrets.REGISTRY_URL }}/mangalord-backend:${{ steps.meta.outputs.image_tag }}
-            ${{ secrets.REGISTRY_URL }}/mangalord-backend:${{ steps.meta.outputs.version }}
-          cache-from: type=gha,scope=backend
-          cache-to: type=gha,mode=max,scope=backend
-
-      - name: Build & push frontend
-        uses: docker/build-push-action@v5
-        with:
-          context: ./frontend
-          push: true
-          tags: |
-            ${{ secrets.REGISTRY_URL }}/mangalord-frontend:latest
-            ${{ secrets.REGISTRY_URL }}/mangalord-frontend:${{ steps.meta.outputs.image_tag }}
-            ${{ secrets.REGISTRY_URL }}/mangalord-frontend:${{ steps.meta.outputs.version }}
-          cache-from: type=gha,scope=frontend
-          cache-to: type=gha,mode=max,scope=frontend
 
   deploy:
     runs-on: ubuntu-latest
     needs: build-and-push
     if: github.event_name != 'pull_request'
     # Single-host deploy: the runner lives on the same box as the stack, so we
-    # drive the host docker daemon directly (act_runner shares its socket via
+    # drive the host docker daemon directly (the job mounts the host docker
-    # `docker_host: "-"`) instead of SSHing out. The compose dir is bind-mounted
+    # socket) instead of SSHing out. The compose dir is bind-mounted at its
-    # at its REAL host path so compose's relative bind-mounts (./mangalord/...,
+    # REAL host path so compose's relative bind-mounts (./mangalord/...,
-    # ./Caddyfile) resolve; this requires `/mnt/ssd/docker-data` in the runner's
+    # ./Caddyfile) resolve; both paths must be in the runner's
     # container.valid_volumes. The central compose references the images as
     # registry.mc02.dev/mangalord-*:${MANGALORD_TAG:-latest}, so we only pull
     # and recreate the two mangalord services at the freshly built SHA.
@@ -136,6 +134,7 @@ jobs:
       image: docker:cli
       volumes:
         - /mnt/ssd/docker-data:/mnt/ssd/docker-data
+        - /var/run/docker.sock:/var/run/docker.sock
     steps:
       - name: Deploy to the local stack
         working-directory: /mnt/ssd/docker-data

backend/Cargo.lock

@@ -1470,7 +1470,7 @@ checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 
 [[package]]
 name = "mangalord"
-version = "0.45.1"
+version = "0.50.0"
 dependencies = [
  "anyhow",
  "argon2",

backend/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mangalord"
-version = "0.45.1"
+version = "0.50.0"
 edition = "2021"
 default-run = "mangalord"
 
@@ -57,3 +57,13 @@ http-body-util = "0.1"
 mime = "0.3"
 futures-util = "0.3"
 tokio = { version = "1", features = ["test-util"] }
+
+# Trim debug builds: keep line numbers in panics / backtraces but drop the
+# full DWARF info (variable-level inspection in gdb/lldb). With a sqlx +
+# axum + tokio dep tree the default ("full") leaves backend/target on the
+# order of tens of GiB; this typically cuts ~50–70% off that.
+[profile.dev]
+debug = "line-tables-only"
+
+[profile.test]
+debug = "line-tables-only"

backend/src/api/admin/mod.rs

@@ -5,6 +5,7 @@
 //! `crate::auth::extractor::RequireAdmin`).
 
 pub mod mangas;
+pub mod resync;
 pub mod system;
 pub mod users;
 
@@ -16,5 +17,6 @@ pub fn routes() -> Router<AppState> {
     Router::new()
         .merge(users::routes())
         .merge(mangas::routes())
+        .merge(resync::routes())
         .merge(system::routes())
 }

backend/src/api/admin/resync.rs

@@ -0,0 +1,176 @@
+//! Admin-triggered force resync of a single manga's metadata + cover,
+//! or a single chapter's content.
+//!
+//! Both endpoints are admin-only (`RequireAdmin`, cookie-only) and run
+//! synchronously with the request — the response carries the refreshed
+//! resource so the UI can swap it in without a follow-up GET. The work
+//! itself is delegated to [`ResyncService`] (set on AppState by
+//! `app::build` when the crawler daemon is enabled); when the daemon
+//! is disabled, both handlers return 503.
+
+use axum::extract::{Path, State};
+use axum::routing::post;
+use axum::{Json, Router};
+use serde::Serialize;
+use serde_json::json;
+use uuid::Uuid;
+
+use crate::app::AppState;
+use crate::auth::extractor::RequireAdmin;
+use crate::crawler::resync::{ChapterResyncOutcome, ResyncError};
+use crate::domain::manga::MangaDetail;
+use crate::domain::Chapter;
+use crate::error::{AppError, AppResult};
+use crate::repo;
+use crate::repo::crawler::UpsertStatus;
+
+pub fn routes() -> Router<AppState> {
+    Router::new()
+        .route("/admin/mangas/:id/resync", post(resync_manga))
+        .route("/admin/chapters/:id/resync", post(resync_chapter))
+}
+
+#[derive(Debug, Serialize)]
+pub struct MangaResyncResponse {
+    pub manga: MangaDetail,
+    /// `"new" | "updated" | "unchanged"` — mirrors [`UpsertStatus`].
+    pub metadata_status: &'static str,
+    pub cover_fetched: bool,
+}
+
+#[derive(Debug, Serialize)]
+pub struct ChapterResyncResponse {
+    pub chapter: Chapter,
+    /// `"fetched" | "skipped"` — whether new pages landed or the
+    /// service short-circuited (e.g. chapter already had pages and the
+    /// session was lost so force was downgraded).
+    pub outcome: &'static str,
+    /// Page count when `outcome == "fetched"`. `None` for `skipped`.
+    pub pages: Option<usize>,
+}
+
+async fn resync_manga(
+    State(state): State<AppState>,
+    admin: RequireAdmin,
+    Path(manga_id): Path<Uuid>,
+) -> AppResult<Json<MangaResyncResponse>> {
+    if !repo::manga::exists(&state.db, manga_id).await? {
+        return Err(AppError::NotFound);
+    }
+    let resync = state
+        .resync
+        .as_ref()
+        .ok_or_else(|| AppError::ServiceUnavailable(
+            "crawler daemon is disabled; force resync unavailable".into(),
+        ))?;
+
+    let outcome = resync.resync_manga(manga_id).await.map_err(map_resync_err)?;
+
+    // Audit the action with the actor + the resync outcome so an
+    // operator-of-operators can answer "who refetched this manga, and
+    // did the cover land?" from the log alone.
+    repo::admin_audit::insert(
+        &state.db,
+        admin.0.id,
+        "manga_resync",
+        "manga",
+        Some(manga_id),
+        json!({
+            "metadata_status": status_str(outcome.metadata_status),
+            "cover_fetched": outcome.cover_fetched,
+        }),
+    )
+    .await?;
+
+    let manga = repo::manga::get_detail(&state.db, manga_id).await?;
+    Ok(Json(MangaResyncResponse {
+        manga,
+        metadata_status: status_str(outcome.metadata_status),
+        cover_fetched: outcome.cover_fetched,
+    }))
+}
+
+async fn resync_chapter(
+    State(state): State<AppState>,
+    admin: RequireAdmin,
+    Path(chapter_id): Path<Uuid>,
+) -> AppResult<Json<ChapterResyncResponse>> {
+    let resync = state
+        .resync
+        .as_ref()
+        .ok_or_else(|| AppError::ServiceUnavailable(
+            "crawler daemon is disabled; force resync unavailable".into(),
+        ))?;
+
+    // Look up the manga the chapter belongs to so we can return the
+    // refreshed chapter row in the response and 404 for unknown ids.
+    let manga_id: Option<Uuid> =
+        sqlx::query_scalar("SELECT manga_id FROM chapters WHERE id = $1")
+            .bind(chapter_id)
+            .fetch_optional(&state.db)
+            .await?;
+    let Some(manga_id) = manga_id else {
+        return Err(AppError::NotFound);
+    };
+
+    let outcome = resync
+        .resync_chapter(chapter_id)
+        .await
+        .map_err(map_resync_err)?;
+
+    let (outcome_str, pages) = match &outcome {
+        ChapterResyncOutcome::Fetched { pages, .. } => ("fetched", Some(*pages)),
+        ChapterResyncOutcome::Skipped { .. } => ("skipped", None),
+    };
+
+    repo::admin_audit::insert(
+        &state.db,
+        admin.0.id,
+        "chapter_resync",
+        "chapter",
+        Some(chapter_id),
+        json!({
+            "outcome": outcome_str,
+            "pages": pages,
+        }),
+    )
+    .await?;
+
+    let chapter = repo::chapter::find_by_id_in_manga(&state.db, manga_id, chapter_id)
+        .await?
+        .ok_or(AppError::NotFound)?;
+    Ok(Json(ChapterResyncResponse {
+        chapter,
+        outcome: outcome_str,
+        pages,
+    }))
+}
+
+fn status_str(s: UpsertStatus) -> &'static str {
+    match s {
+        UpsertStatus::New => "new",
+        UpsertStatus::Updated => "updated",
+        UpsertStatus::Unchanged => "unchanged",
+    }
+}
+
+/// Map [`ResyncError`] (and the anyhow envelopes wrapping it) onto the
+/// right [`AppError`]. Anything else surfaces as a generic 500 via the
+/// `Other` arm — the operator sees the underlying anyhow chain in
+/// server logs, the client sees a clean envelope.
+fn map_resync_err(err: anyhow::Error) -> AppError {
+    if let Some(rerr) = err.downcast_ref::<ResyncError>() {
+        match rerr {
+            ResyncError::NoMangaSource => AppError::ValidationFailed {
+                message: "manga has no live crawler source — cannot resync".into(),
+                details: json!({ "manga": "no_source" }),
+            },
+            ResyncError::NoChapterSource => AppError::ValidationFailed {
+                message: "chapter has no live crawler source — cannot resync".into(),
+                details: json!({ "chapter": "no_source" }),
+            },
+        }
+    } else {
+        AppError::Other(err)
+    }
+}

backend/src/api/auth.rs

@@ -42,18 +42,22 @@ pub fn routes() -> Router<AppState> {
         .route("/auth/tokens/:id", delete(delete_token))
 }
 
-/// Public, unauthenticated. Exposes anonymous-relevant auth policy
+/// Public, unauthenticated. Exposes anonymous-relevant auth policy so
-/// (currently just whether self-registration is open) so the frontend
+/// the frontend can render its login / register affordances correctly
-/// can render its login / register affordances correctly without a
+/// without a probe request that would conflate "disabled" with
-/// probe request that would conflate "disabled" with "rate-limited".
+/// "rate-limited". `self_register_enabled` is the *effective* value
+/// (`allow_self_register && !private_mode`), so a private-mode
+/// instance reports `false` even if the raw flag is on.
 #[derive(Debug, Serialize)]
 pub struct AuthConfigResponse {
     pub self_register_enabled: bool,
+    pub private_mode: bool,
 }
 
 async fn auth_config(State(state): State<AppState>) -> Json<AuthConfigResponse> {
     Json(AuthConfigResponse {
-        self_register_enabled: state.auth.allow_self_register,
+        self_register_enabled: state.auth.allow_self_register && !state.auth.private_mode,
+        private_mode: state.auth.private_mode,
     })
 }
 
@@ -103,7 +107,10 @@ async fn register(
     // disabled and enabled paths both consume a token, and disabled
     // returns 403 instead of running argon2.
     check_auth_rate_limit(&state, "register")?;
-    if !state.auth.allow_self_register {
+    // Private mode force-blocks self-registration regardless of
+    // ALLOW_SELF_REGISTER — operators of locked-down instances mint
+    // accounts via `POST /admin/users` instead.
+    if !state.auth.allow_self_register || state.auth.private_mode {
         return Err(AppError::Forbidden);
     }
     let username = input.username.trim();

backend/src/app.rs

@@ -3,8 +3,10 @@ use std::sync::atomic::AtomicBool;
 
 use anyhow::Context;
 use async_trait::async_trait;
-use axum::extract::DefaultBodyLimit;
+use axum::extract::{DefaultBodyLimit, FromRequestParts, Request, State};
 use axum::http::{HeaderName, HeaderValue, Method};
+use axum::middleware::{self, Next};
+use axum::response::Response;
 use axum::Router;
 use sqlx::postgres::PgPoolOptions;
 use sqlx::PgPool;
@@ -12,7 +14,9 @@ use tokio_util::sync::CancellationToken;
 use tower_http::cors::{AllowOrigin, CorsLayer};
 use tower_http::trace::TraceLayer;
 
+use crate::auth::extractor::CurrentUser;
 use crate::auth::rate_limit::AuthRateLimiter;
+use crate::error::AppError;
 use crate::config::{AuthConfig, Config, CrawlerConfig, UploadConfig};
 use crate::crawler::browser_manager::{self, BrowserManager};
 use crate::crawler::content::{self, SyncOutcome};
@@ -20,6 +24,7 @@ use crate::crawler::daemon::{self, ChapterDispatcher, DaemonConfig, MetadataPass
 use crate::crawler::jobs::JobPayload;
 use crate::crawler::pipeline::{self, MetadataStats};
 use crate::crawler::rate_limit::HostRateLimiters;
+use crate::crawler::resync::{RealResyncService, ResyncService};
 use crate::crawler::safety::DownloadAllowlist;
 use crate::crawler::session;
 use crate::repo;
@@ -35,6 +40,12 @@ pub struct AppState {
     /// One instance per AppState so tests stay isolated across the
     /// same process.
     pub auth_limiter: Arc<AuthRateLimiter>,
+    /// Admin-triggered force resync. `None` when the crawler daemon
+    /// is disabled (`CRAWLER_DAEMON=false`); admin handlers gate on
+    /// `.is_some()` and return 503 otherwise. Set by [`build`] from the
+    /// same wiring that builds the daemon's chapter dispatcher, so a
+    /// force resync uses the daemon's BrowserManager + rate limiters.
+    pub resync: Option<Arc<dyn ResyncService>>,
 }
 
 /// Bundle returned by [`build`]. The router is what `axum::serve` consumes;
@@ -69,11 +80,12 @@ pub async fn build(config: Config) -> anyhow::Result<AppHandle> {
 
     let storage: Arc<dyn Storage> = Arc::new(LocalStorage::new(config.storage_dir.clone()));
 
-    let daemon = if config.crawler.daemon_enabled {
+    let (daemon, resync) = if config.crawler.daemon_enabled {
-        Some(spawn_crawler_daemon(db.clone(), Arc::clone(&storage), &config.crawler).await?)
+        let spawned = spawn_crawler_daemon(db.clone(), Arc::clone(&storage), &config.crawler).await?;
+        (Some(spawned.handle), Some(spawned.resync))
     } else {
         tracing::info!("crawler daemon disabled (CRAWLER_DAEMON=false)");
-        None
+        (None, None)
     };
 
     let auth_limiter = Arc::new(AuthRateLimiter::new(config.auth.rate_limit));
@@ -83,16 +95,26 @@ pub async fn build(config: Config) -> anyhow::Result<AppHandle> {
         auth: config.auth.clone(),
         upload: config.upload.clone(),
         auth_limiter,
+        resync,
     };
     let router = router(state).layer(cors_layer(&config.cors_allowed_origins));
     Ok(AppHandle { router, daemon })
 }
 
+/// Bundle returned by [`spawn_crawler_daemon`]. The handle owns the
+/// daemon's tasks; `resync` is the operator-trigger service shared with
+/// `AppState` so admin endpoints can call into the same browser /
+/// rate-limit machinery.
+struct SpawnedDaemon {
+    handle: daemon::DaemonHandle,
+    resync: Arc<dyn ResyncService>,
+}
+
 async fn spawn_crawler_daemon(
     db: PgPool,
     storage: Arc<dyn Storage>,
     cfg: &CrawlerConfig,
-) -> anyhow::Result<daemon::DaemonHandle> {
+) -> anyhow::Result<SpawnedDaemon> {
     // Reqwest client with cookie jar pre-seeded so CDN image fetches
     // include PHPSESSID. Same shape as bin/crawler.rs main().
     let cookie_jar = Arc::new(reqwest::cookie::Jar::default());
@@ -123,27 +145,47 @@ async fn spawn_crawler_daemon(
     }
     let rate = Arc::new(rate);
 
+    let tor = crate::crawler::tor::TorController::from_parts(
+        cfg.tor_control_url.as_deref(),
+        cfg.tor_control_password.as_deref(),
+        cfg.tor_control_cookie_path.as_deref(),
+    )
+    .context("build TorController from CRAWLER_TOR_CONTROL_* env")?
+    .map(Arc::new);
+    if let Some(t) = &tor {
+        tracing::info!(?t, "TOR control configured; transient pages will trigger NEWNYM");
+    }
+    let tor_recircuit_max = cfg.tor_recircuit_max_attempts;
+
     // Browser manager. on_launch re-injects PHPSESSID on every fresh
     // chromium spawn so an idle teardown followed by re-launch stays
     // authenticated without operator action.
     let mut launch_opts = cfg.browser.clone();
     if let Some(proxy) = &cfg.proxy {
-        launch_opts.extra_args.push(format!("--proxy-server={proxy}"));
+        let chromium_proxy = crate::crawler::url_utils::chromium_proxy_arg(proxy);
+        launch_opts.extra_args.push(format!("--proxy-server={chromium_proxy}"));
     }
     let on_launch = match (&cfg.phpsessid, &cfg.cookie_domain, &cfg.start_url) {
         (Some(sid), Some(domain), Some(start_url)) => {
             let sid = sid.clone();
             let domain = domain.clone();
             let start_url = start_url.clone();
+            let tor_for_launch = tor.as_ref().map(Arc::clone);
             let on_launch: browser_manager::OnLaunch = Arc::new(move |browser| {
                 let sid = sid.clone();
                 let domain = domain.clone();
                 let start_url = start_url.clone();
+                let tor_for_launch = tor_for_launch.as_ref().map(Arc::clone);
                 Box::pin(async move {
                     session::inject_phpsessid(&browser, &sid, &domain)
                         .await
                         .context("on_launch: inject_phpsessid")?;
-                    session::verify_session(&browser, &start_url)
+                    session::verify_session_with_recircuit(
+                        &browser,
+                        &start_url,
+                        tor_for_launch.as_deref(),
+                        tor_recircuit_max,
+                    )
                     .await
                     .context("on_launch: verify_session")?;
                     Ok(())
@@ -165,13 +207,26 @@ async fn spawn_crawler_daemon(
             http: http.clone(),
             rate: Arc::clone(&rate),
             start_url: url.clone(),
+            manga_limit: cfg.manga_limit,
             download_allowlist: cfg.download_allowlist.clone(),
             max_image_bytes: cfg.max_image_bytes,
+            tor: tor.as_ref().map(Arc::clone),
         });
         m
     });
 
     let dispatcher: Arc<dyn ChapterDispatcher> = Arc::new(RealChapterDispatcher {
+        browser_manager: Arc::clone(&browser_manager),
+        db: db.clone(),
+        storage: Arc::clone(&storage),
+        http: http.clone(),
+        rate: Arc::clone(&rate),
+        download_allowlist: cfg.download_allowlist.clone(),
+        max_image_bytes: cfg.max_image_bytes,
+        tor: tor.as_ref().map(Arc::clone),
+    });
+
+    let resync: Arc<dyn ResyncService> = Arc::new(RealResyncService {
         browser_manager: Arc::clone(&browser_manager),
         db: db.clone(),
         storage: Arc::clone(&storage),
@@ -179,6 +234,7 @@ async fn spawn_crawler_daemon(
         rate: Arc::clone(&rate),
         download_allowlist: cfg.download_allowlist.clone(),
         max_image_bytes: cfg.max_image_bytes,
+        tor: tor.as_ref().map(Arc::clone),
     });
 
     // Shared cancellation: daemon shutdown cancels the BrowserManager's
@@ -215,7 +271,10 @@ async fn spawn_crawler_daemon(
         },
     );
 
-    Ok(daemon_handle)
+    Ok(SpawnedDaemon {
+        handle: daemon_handle,
+        resync,
+    })
 }
 
 // Real impls of the daemon traits, owning the browser manager + I/O. Kept
@@ -230,8 +289,10 @@ struct RealMetadataPass {
     http: reqwest::Client,
     rate: Arc<HostRateLimiters>,
     start_url: String,
+    manga_limit: usize,
     download_allowlist: DownloadAllowlist,
     max_image_bytes: usize,
+    tor: Option<Arc<crate::crawler::tor::TorController>>,
 }
 
 #[async_trait]
@@ -244,10 +305,11 @@ impl MetadataPass for RealMetadataPass {
             &self.http,
             &self.rate,
             &self.start_url,
-            0,
+            self.manga_limit,
             false,
             &self.download_allowlist,
             self.max_image_bytes,
+            self.tor.as_deref(),
         )
         .await;
         if let Err(e) = &result {
@@ -255,6 +317,36 @@ impl MetadataPass for RealMetadataPass {
                 self.browser_manager.invalidate().await;
             }
         }
+        // Cover backfill follows the metadata pass even when the pass
+        // errored — the early-stop walk can complete its work and bail
+        // late, and a transient browser failure shouldn't cancel the
+        // residual cover backlog. The backfill has its own per-call cap
+        // so a runaway error stream can't monopolise the tick.
+        match pipeline::backfill_missing_covers(
+            &self.browser_manager,
+            &self.db,
+            self.storage.as_ref(),
+            &self.http,
+            &self.rate,
+            pipeline::COVER_BACKFILL_DEFAULT_MAX,
+            &self.download_allowlist,
+            self.max_image_bytes,
+            self.tor.as_deref(),
+        )
+        .await
+        {
+            Ok(stats) => {
+                if stats.considered > 0 {
+                    tracing::info!(?stats, "cover backfill complete");
+                }
+            }
+            Err(e) => {
+                tracing::warn!(error = ?e, "cover backfill failed");
+                if crate::crawler::nav::anyhow_looks_browser_dead(&e) {
+                    self.browser_manager.invalidate().await;
+                }
+            }
+        }
         result
     }
 }
@@ -267,6 +359,7 @@ struct RealChapterDispatcher {
     rate: Arc<HostRateLimiters>,
     download_allowlist: DownloadAllowlist,
     max_image_bytes: usize,
+    tor: Option<Arc<crate::crawler::tor::TorController>>,
 }
 
 #[async_trait]
@@ -298,6 +391,7 @@ impl ChapterDispatcher for RealChapterDispatcher {
                     false,
                     &self.download_allowlist,
                     self.max_image_bytes,
+                    self.tor.as_deref(),
                 )
                 .await;
                 drop(lease);
@@ -325,11 +419,62 @@ pub fn router(state: AppState) -> Router {
     let max_request_bytes = state.upload.max_request_bytes;
     Router::new()
         .nest("/api/v1", crate::api::routes())
+        .layer(middleware::from_fn_with_state(
+            state.clone(),
+            private_mode_guard,
+        ))
         .layer(DefaultBodyLimit::max(max_request_bytes))
         .with_state(state)
         .layer(TraceLayer::new_for_http())
 }
 
+/// Paths reachable anonymously even when `PRIVATE_MODE=true`. Login and
+/// logout are needed for the auth flow itself; `/health` is reserved
+/// for load-balancer probes; `/auth/config` lets the frontend decide
+/// whether to render the login form or its anonymous alternatives;
+/// `/auth/register` is exempted from the gate so the handler can
+/// return its informative `registration_disabled` 403 (the same code
+/// public-mode deployments use when `ALLOW_SELF_REGISTER=false`) —
+/// the handler itself force-blocks the request body in private mode,
+/// so no account ever gets created here. Everything else demands a
+/// valid session cookie or bearer token.
+fn is_public_in_private_mode(path: &str) -> bool {
+    matches!(
+        path,
+        "/api/v1/health"
+            | "/api/v1/auth/config"
+            | "/api/v1/auth/login"
+            | "/api/v1/auth/logout"
+            | "/api/v1/auth/register"
+    )
+}
+
+/// Site-wide auth gate for `PRIVATE_MODE=true`. With the flag off this
+/// is a no-op pass-through, so public deployments take no extra DB
+/// hit. With it on, the guard reuses [`CurrentUser`] — the same
+/// session-cookie-then-bearer-token logic the per-handler extractor
+/// uses — so the two paths can never drift.
+async fn private_mode_guard(
+    State(state): State<AppState>,
+    req: Request,
+    next: Next,
+) -> Result<Response, AppError> {
+    if !state.auth.private_mode {
+        return Ok(next.run(req).await);
+    }
+    if is_public_in_private_mode(req.uri().path()) {
+        return Ok(next.run(req).await);
+    }
+    let (mut parts, body) = req.into_parts();
+    match CurrentUser::from_request_parts(&mut parts, &state).await {
+        Ok(_) => {
+            let req = Request::from_parts(parts, body);
+            Ok(next.run(req).await)
+        }
+        Err(_) => Err(AppError::Unauthenticated),
+    }
+}
+
 pub(crate) fn cors_layer(allowed_origins: &[String]) -> CorsLayer {
     if allowed_origins.is_empty() {
         // Same-origin only — no CORS headers emitted.

backend/src/bin/crawler.rs

@@ -78,6 +78,21 @@ async fn main() -> anyhow::Result<()> {
     let proxy_url = std::env::var("CRAWLER_PROXY")
         .ok()
         .filter(|s| !s.trim().is_empty());
+    let tor_control_url = std::env::var("CRAWLER_TOR_CONTROL_URL")
+        .ok()
+        .filter(|s| !s.trim().is_empty());
+    let tor_control_password = std::env::var("CRAWLER_TOR_CONTROL_PASSWORD")
+        .ok()
+        .filter(|s| !s.trim().is_empty());
+    let tor_control_cookie_path = std::env::var("CRAWLER_TOR_CONTROL_COOKIE_PATH")
+        .ok()
+        .filter(|s| !s.trim().is_empty())
+        .map(std::path::PathBuf::from);
+    let tor_recircuit_max_attempts: u32 = std::env::var("CRAWLER_TOR_RECIRCUIT_MAX_ATTEMPTS")
+        .ok()
+        .and_then(|s| s.parse().ok())
+        .unwrap_or(3)
+        .max(1);
     let keep_browser_open = env_bool("CRAWLER_KEEP_BROWSER_OPEN", false);
 
     let db = PgPoolOptions::new()
@@ -112,7 +127,8 @@ async fn main() -> anyhow::Result<()> {
 
     let mut options = LaunchOptions::from_env();
     if let Some(proxy) = &proxy_url {
-        options.extra_args.push(format!("--proxy-server={proxy}"));
+        let chromium_proxy = mangalord::crawler::url_utils::chromium_proxy_arg(proxy);
+        options.extra_args.push(format!("--proxy-server={chromium_proxy}"));
     }
     let keep_open = match (keep_browser_open, options.mode) {
         (true, BrowserMode::Headed) => true,
@@ -144,6 +160,17 @@ async fn main() -> anyhow::Result<()> {
         "starting crawler"
     );
 
+    let tor = mangalord::crawler::tor::TorController::from_parts(
+        tor_control_url.as_deref(),
+        tor_control_password.as_deref(),
+        tor_control_cookie_path.as_deref(),
+    )
+    .context("build TorController from CRAWLER_TOR_CONTROL_* env")?
+    .map(Arc::new);
+    if let Some(t) = &tor {
+        tracing::info!(?t, "TOR control configured");
+    }
+
     // BrowserManager with idle_timeout = ZERO so the CLI keeps Chromium
     // alive for the entire run — same lifecycle as the old direct
     // `browser::launch()` flow. on_launch re-injects PHPSESSID + runs the
@@ -153,15 +180,22 @@ async fn main() -> anyhow::Result<()> {
             let sid = sid.clone();
             let domain = domain.clone();
             let start_url_clone = start_url.clone();
+            let tor_for_launch = tor.as_ref().map(Arc::clone);
             Arc::new(move |browser| {
                 let sid = sid.clone();
                 let domain = domain.clone();
                 let start_url = start_url_clone.clone();
+                let tor_for_launch = tor_for_launch.as_ref().map(Arc::clone);
                 Box::pin(async move {
                     session::inject_phpsessid(&browser, &sid, &domain)
                         .await
                         .context("inject_phpsessid")?;
-                    session::verify_session(&browser, &start_url)
+                    session::verify_session_with_recircuit(
+                        &browser,
+                        &start_url,
+                        tor_for_launch.as_deref(),
+                        tor_recircuit_max_attempts,
+                    )
                     .await
                     .context("verify_session")?;
                     Ok(())
@@ -187,6 +221,7 @@ async fn main() -> anyhow::Result<()> {
         skip_chapter_content || !session_ready,
         chapter_workers,
         force_refetch_chapters,
+        tor.clone(),
     )
     .await;
 
@@ -216,6 +251,7 @@ async fn run(
     skip_chapter_content: bool,
     chapter_workers: usize,
     force_refetch_chapters: bool,
+    tor: Option<Arc<mangalord::crawler::tor::TorController>>,
 ) -> anyhow::Result<()> {
     let mut rate = HostRateLimiters::new(Duration::from_millis(rate_ms));
     if let Some(host) = cdn_host {
@@ -267,6 +303,7 @@ async fn run(
         skip_chapters,
         allowlist.as_ref(),
         max_image_bytes,
+        tor.as_deref(),
     )
     .await?;
     tracing::info!(?stats, "metadata pass complete");
@@ -283,6 +320,7 @@ async fn run(
             force_refetch_chapters,
             Arc::clone(&allowlist),
             max_image_bytes,
+            tor.clone(),
         )
         .await?;
     }
@@ -308,6 +346,7 @@ async fn sync_bookmarked_chapter_content(
     force_refetch: bool,
     allowlist: Arc<mangalord::crawler::safety::DownloadAllowlist>,
     max_image_bytes: usize,
+    tor: Option<Arc<mangalord::crawler::tor::TorController>>,
 ) -> anyhow::Result<()> {
     let pending: Vec<(Uuid, Uuid, String)> = sqlx::query_as(
         r#"
@@ -345,6 +384,7 @@ async fn sync_bookmarked_chapter_content(
             let rate = Arc::clone(&rate);
             let manager = Arc::clone(&manager);
             let allowlist = Arc::clone(&allowlist);
+            let tor = tor.clone();
             let stats = &stats;
             async move {
                 if session_expired.load(std::sync::atomic::Ordering::Relaxed) {
@@ -371,6 +411,7 @@ async fn sync_bookmarked_chapter_content(
                     force_refetch,
                     allowlist.as_ref(),
                     max_image_bytes,
+                    tor.as_deref(),
                 )
                 .await;
                 drop(lease);

backend/src/config.rs

@@ -19,6 +19,14 @@ pub struct AuthConfig {
     /// `POST /admin/users`. Defaults to `true` (open registration)
     /// for backward compatibility.
     pub allow_self_register: bool,
+    /// When `true`, every API path except a small allowlist
+    /// (`/health`, `/auth/config`, `/auth/login`, `/auth/logout`)
+    /// requires a valid session cookie or bearer token — anonymous
+    /// reads are rejected with 401. Self-registration is also
+    /// force-disabled regardless of [`Self::allow_self_register`]
+    /// so a private instance is locked down with a single switch.
+    /// Defaults to `false` (current public behaviour).
+    pub private_mode: bool,
 }
 
 impl Default for AuthConfig {
@@ -33,6 +41,7 @@ impl Default for AuthConfig {
             // defaults.
             rate_limit: crate::auth::rate_limit::RateLimitConfig::default(),
             allow_self_register: true,
+            private_mode: false,
         }
     }
 }
@@ -97,6 +106,20 @@ pub struct CrawlerConfig {
     pub cookie_domain: Option<String>,
     pub user_agent: Option<String>,
     pub proxy: Option<String>,
+    /// `tcp://host:port`, `host:port`, or bare `host` (default port
+    /// 9051). When `None`, TOR-recircuit-on-transient is disabled and
+    /// the crawler behaves identically to pre-TOR releases.
+    pub tor_control_url: Option<String>,
+    /// HashedControlPassword auth. Used only when
+    /// `tor_control_cookie_path` is `None`.
+    pub tor_control_password: Option<String>,
+    /// Cookie-file auth path (e.g.
+    /// `/var/lib/tor/control_auth_cookie`). Takes precedence over
+    /// password when both are set.
+    pub tor_control_cookie_path: Option<PathBuf>,
+    /// Maximum NEWNYM-and-retry cycles per recircuit-eligible failure.
+    /// Defaults to 3.
+    pub tor_recircuit_max_attempts: u32,
     pub browser: LaunchOptions,
     /// Hosts the crawler is allowed to download images / covers from.
     /// Always seeded with the host of `start_url` and (when set) the
@@ -105,6 +128,10 @@ pub struct CrawlerConfig {
     pub download_allowlist: DownloadAllowlist,
     /// Hard upper bound on a single image download. Defaults to 32 MiB.
     pub max_image_bytes: usize,
+    /// Max manga detail fetches per metadata pass. `0` means no cap
+    /// (full sweep up to the source's own bound). Sourced from
+    /// `CRAWLER_LIMIT`, mirroring the CLI binary.
+    pub manga_limit: usize,
 }
 
 impl Default for CrawlerConfig {
@@ -124,9 +151,14 @@ impl Default for CrawlerConfig {
             cookie_domain: None,
             user_agent: None,
             proxy: None,
+            tor_control_url: None,
+            tor_control_password: None,
+            tor_control_cookie_path: None,
+            tor_recircuit_max_attempts: 3,
             browser: LaunchOptions::headless(),
             download_allowlist: DownloadAllowlist::new(),
             max_image_bytes: DEFAULT_MAX_IMAGE_BYTES,
+            manga_limit: 0,
         }
     }
 }
@@ -158,6 +190,7 @@ impl Config {
                     ) as u32,
                 },
                 allow_self_register: env_bool("ALLOW_SELF_REGISTER", true),
+                private_mode: env_bool("PRIVATE_MODE", false),
             },
             upload: UploadConfig {
                 max_request_bytes: env_usize("MAX_REQUEST_BYTES", 200 * 1024 * 1024),
@@ -234,9 +267,22 @@ impl CrawlerConfig {
             proxy: std::env::var("CRAWLER_PROXY")
                 .ok()
                 .filter(|s| !s.trim().is_empty()),
+            tor_control_url: std::env::var("CRAWLER_TOR_CONTROL_URL")
+                .ok()
+                .filter(|s| !s.trim().is_empty()),
+            tor_control_password: std::env::var("CRAWLER_TOR_CONTROL_PASSWORD")
+                .ok()
+                .filter(|s| !s.trim().is_empty()),
+            tor_control_cookie_path: std::env::var("CRAWLER_TOR_CONTROL_COOKIE_PATH")
+                .ok()
+                .filter(|s| !s.trim().is_empty())
+                .map(PathBuf::from),
+            tor_recircuit_max_attempts: env_u64("CRAWLER_TOR_RECIRCUIT_MAX_ATTEMPTS", 3)
+                .max(1) as u32,
             browser: LaunchOptions::from_env(),
             download_allowlist,
             max_image_bytes: env_usize("CRAWLER_MAX_IMAGE_BYTES", DEFAULT_MAX_IMAGE_BYTES),
+            manga_limit: env_usize("CRAWLER_LIMIT", 0),
         })
     }
 }
@@ -310,3 +356,64 @@ fn env_usize(name: &str, default: usize) -> usize {
         .unwrap_or(default)
 }
 
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::Mutex;
+
+    // Serialise env-touching tests so concurrent cargo-test threads don't
+    // race on the process-global env. Re-acquire on poison since a
+    // panicking test still leaves the env in a consistent state for us
+    // (we set/unset within each guard region).
+    static ENV_GUARD: Mutex<()> = Mutex::new(());
+
+    #[test]
+    fn crawler_limit_env_populates_manga_limit() {
+        let _g = ENV_GUARD.lock().unwrap_or_else(|p| p.into_inner());
+        std::env::set_var("CRAWLER_LIMIT", "96");
+        let cfg = CrawlerConfig::from_env().expect("from_env");
+        std::env::remove_var("CRAWLER_LIMIT");
+        assert_eq!(cfg.manga_limit, 96);
+    }
+
+    #[test]
+    fn crawler_limit_unset_defaults_to_zero() {
+        let _g = ENV_GUARD.lock().unwrap_or_else(|p| p.into_inner());
+        std::env::remove_var("CRAWLER_LIMIT");
+        let cfg = CrawlerConfig::from_env().expect("from_env");
+        assert_eq!(cfg.manga_limit, 0);
+    }
+
+    #[test]
+    fn private_mode_env_parses_true() {
+        let _g = ENV_GUARD.lock().unwrap_or_else(|p| p.into_inner());
+        std::env::set_var("PRIVATE_MODE", "true");
+        std::env::set_var("DATABASE_URL", "postgres://test");
+        let cfg = Config::from_env().expect("from_env");
+        std::env::remove_var("PRIVATE_MODE");
+        std::env::remove_var("DATABASE_URL");
+        assert!(cfg.auth.private_mode);
+    }
+
+    #[test]
+    fn private_mode_env_parses_false() {
+        let _g = ENV_GUARD.lock().unwrap_or_else(|p| p.into_inner());
+        std::env::set_var("PRIVATE_MODE", "false");
+        std::env::set_var("DATABASE_URL", "postgres://test");
+        let cfg = Config::from_env().expect("from_env");
+        std::env::remove_var("PRIVATE_MODE");
+        std::env::remove_var("DATABASE_URL");
+        assert!(!cfg.auth.private_mode);
+    }
+
+    #[test]
+    fn private_mode_defaults_to_false() {
+        let _g = ENV_GUARD.lock().unwrap_or_else(|p| p.into_inner());
+        std::env::remove_var("PRIVATE_MODE");
+        std::env::set_var("DATABASE_URL", "postgres://test");
+        let cfg = Config::from_env().expect("from_env");
+        std::env::remove_var("DATABASE_URL");
+        assert!(!cfg.auth.private_mode);
+    }
+}
+

backend/src/crawler/content.rs

@@ -73,39 +73,36 @@ pub enum SyncOutcome {
     SessionExpired,
 }
 
-/// Fetch all images for one chapter and persist them atomically. On
+/// Per-chapter max fetch attempts when TOR is configured. `N = 3` means
-/// any error after the first storage put, the DB transaction rolls
+/// up to 3 total page fetches with 2 NEWNYM signals between them. When
-/// back so the chapter stays at `page_count = 0` and is retried on the
+/// TOR is not configured the effective budget collapses to 1 (single
-/// next run. Bytes already written to storage become orphans; a future
+/// attempt, no retry, no recircuit — bit-for-bit pre-TOR behavior).
-/// reaper sweeps them.
+const CHAPTER_RECIRCUIT_MAX_ATTEMPTS: u32 = 3;
-#[allow(clippy::too_many_arguments)]
-pub async fn sync_chapter_content(
-    browser: &chromiumoxide::Browser,
-    db: &PgPool,
-    storage: &dyn Storage,
-    http: &reqwest::Client,
-    rate: &HostRateLimiters,
-    chapter_id: Uuid,
-    manga_id: Uuid,
-    source_url: &str,
-    force_refetch: bool,
-    allowlist: &DownloadAllowlist,
-    max_image_bytes: usize,
-) -> anyhow::Result<SyncOutcome> {
-    // Skip if already fetched, unless caller explicitly forces.
-    if !force_refetch {
-        let (page_count,): (i32,) =
-            sqlx::query_as("SELECT page_count FROM chapters WHERE id = $1")
-                .bind(chapter_id)
-                .fetch_one(db)
-                .await
-                .context("read chapter page_count")?;
-        if page_count > 0 {
-            return Ok(SyncOutcome::Skipped);
-        }
-    }
 
-    // Nav to chapter page (rate-limited per host).
+/// Outcome of [`fetch_chapter_html_with_recircuit`]. `Ok` carries the
+/// final reader HTML; the other two map to `sync_chapter_content`'s
+/// existing failure modes.
+#[derive(Debug)]
+enum ChapterFetchOutcome {
+    Ok(String),
+    /// `ChapterProbe::Unauthenticated` after exhausting recircuit
+    /// budget (or with budget=0). Caller returns
+    /// `SyncOutcome::SessionExpired`.
+    SessionExpired,
+    /// `ChapterProbe::Transient` after exhausting recircuit budget
+    /// (or with budget=0). Caller bails so the dispatcher does
+    /// exponential backoff.
+    PersistentTransient,
+}
+
+/// Single rate-limited Chromium navigation to the chapter URL,
+/// returning the page HTML. Extracted from `sync_chapter_content` so
+/// the recircuit loop can call it once per attempt.
+async fn fetch_chapter_html_once(
+    browser: &chromiumoxide::Browser,
+    rate: &HostRateLimiters,
+    source_url: &str,
+) -> anyhow::Result<String> {
     rate.wait_for(source_url).await?;
     let page = browser
         .new_page(source_url)
@@ -124,28 +121,135 @@ pub async fn sync_chapter_content(
         crate::crawler::nav::SELECTOR_TIMEOUT,
     )
     .await;
-
     let html = page.content().await.context("read chapter html")?;
     page.close().await.ok();
+    Ok(html)
+}
 
-    // Three-way session classification: distinguishes a transient
+/// Pure-over-IO loop: fetch + classify, up to `max_attempts` total
-    // hiccup (broken-page body or logged-in-but-no-reader) from a
+/// fetches. Between attempts, `recircuit` is invoked (a no-op when
-    // genuine PHPSESSID expiry (no reader and no avatar widget). The
+/// TOR isn't configured). `max_attempts = 1` collapses to the
-    // earlier binary `#avatar_menu` check conflated both and froze
+/// original single-shot behavior — `Unauthenticated` →
-    // every worker on a layout shift.
+/// `SessionExpired`, `Transient` → `PersistentTransient` on the first
+/// hit, no recircuit.
+///
+/// Semantics match [`crate::crawler::detect::retry_on_transient`] and
+/// [`run_session_probe_loop`]: `N` is **total attempts including the
+/// first**, so `N = 3` means 3 fetches and up to 2 NEWNYM calls.
+/// `Unauthenticated` and `Transient` share the budget — the loop
+/// doesn't distinguish, so a sequence like Transient → Unauth → Ok
+/// counts as 3 attempts.
+async fn fetch_chapter_html_with_recircuit<F, Fut, R, RFut>(
+    mut fetch: F,
+    mut recircuit: R,
+    max_attempts: u32,
+    source_url_for_msg: &str,
+) -> anyhow::Result<ChapterFetchOutcome>
+where
+    F: FnMut() -> Fut,
+    Fut: std::future::Future<Output = anyhow::Result<String>>,
+    R: FnMut() -> RFut,
+    RFut: std::future::Future<Output = ()>,
+{
+    debug_assert!(max_attempts >= 1, "max_attempts must be at least 1");
+    let mut attempt = 0u32;
+    loop {
+        attempt += 1;
+        let html = fetch().await?;
         match session::classify_chapter_probe(&html) {
-        ChapterProbe::Unauthenticated => return Ok(SyncOutcome::SessionExpired),
+            ChapterProbe::Ok => return Ok(ChapterFetchOutcome::Ok(html)),
+            ChapterProbe::Unauthenticated => {
+                if attempt >= max_attempts {
+                    return Ok(ChapterFetchOutcome::SessionExpired);
+                }
+                tracing::warn!(
+                    attempt,
+                    max = max_attempts,
+                    url = source_url_for_msg,
+                    "chapter probe Unauthenticated; signaling TOR NEWNYM and retrying"
+                );
+                recircuit().await;
+            }
             ChapterProbe::Transient => {
+                if attempt >= max_attempts {
+                    return Ok(ChapterFetchOutcome::PersistentTransient);
+                }
+                tracing::warn!(
+                    attempt,
+                    max = max_attempts,
+                    url = source_url_for_msg,
+                    "chapter probe Transient; signaling TOR NEWNYM and retrying"
+                );
+                recircuit().await;
+            }
+        }
+    }
+}
+
+/// Fetch all images for one chapter and persist them atomically. On
+/// any error after the first storage put, the DB transaction rolls
+/// back so the chapter stays at `page_count = 0` and is retried on the
+/// next run. Bytes already written to storage become orphans; a future
+/// reaper sweeps them.
+#[allow(clippy::too_many_arguments)]
+pub async fn sync_chapter_content(
+    browser: &chromiumoxide::Browser,
+    db: &PgPool,
+    storage: &dyn Storage,
+    http: &reqwest::Client,
+    rate: &HostRateLimiters,
+    chapter_id: Uuid,
+    manga_id: Uuid,
+    source_url: &str,
+    force_refetch: bool,
+    allowlist: &DownloadAllowlist,
+    max_image_bytes: usize,
+    tor: Option<&crate::crawler::tor::TorController>,
+) -> anyhow::Result<SyncOutcome> {
+    // Skip if already fetched, unless caller explicitly forces.
+    if !force_refetch {
+        let (page_count,): (i32,) =
+            sqlx::query_as("SELECT page_count FROM chapters WHERE id = $1")
+                .bind(chapter_id)
+                .fetch_one(db)
+                .await
+                .context("read chapter page_count")?;
+        if page_count > 0 {
+            return Ok(SyncOutcome::Skipped);
+        }
+    }
+
+    // Fetch + classify. With TOR configured, allow up to
+    // CHAPTER_RECIRCUIT_MAX_ATTEMPTS total page fetches with NEWNYM
+    // between each. Without TOR, collapse to 1 attempt (no retry, no
+    // recircuit) — matches the pre-TOR single-shot behavior bit-for-bit.
+    let max_attempts = if tor.is_some() { CHAPTER_RECIRCUIT_MAX_ATTEMPTS } else { 1 };
+    let html = match fetch_chapter_html_with_recircuit(
+        || fetch_chapter_html_once(browser, rate, source_url),
+        || async {
+            if let Some(t) = tor {
+                if let Err(e) = t.new_identity().await {
+                    tracing::warn!(error = %e, "TOR NEWNYM failed; continuing with same circuit");
+                }
+            }
+        },
+        max_attempts,
+        source_url,
+    )
+    .await?
+    {
+        ChapterFetchOutcome::Ok(html) => html,
+        ChapterFetchOutcome::SessionExpired => return Ok(SyncOutcome::SessionExpired),
+        ChapterFetchOutcome::PersistentTransient => {
             // Surface as a typed Err so the dispatcher path runs
             // ack_failed with exponential backoff (rather than the
             // session-expired sticky flag).
             anyhow::bail!(
-                "chapter page at {source_url} returned a transient response \
+                "chapter page at {source_url} returned a transient response after \
-                 (broken-page body or reader didn't render); will retry"
+                 {max_attempts} attempt(s); will retry"
             );
         }
-        ChapterProbe::Ok => {}
+    };
-    }
 
     let images = parse_chapter_pages(&html)
         .with_context(|| format!("parse chapter pages at {source_url}"))?;
@@ -304,4 +408,214 @@ mod tests {
         let err = parse_chapter_pages(html).expect_err("expected Transient");
         assert!(err.is_transient(), "got non-transient: {err}");
     }
+
+    // --- fetch_chapter_html_with_recircuit -------------------------------
+
+    const OK_HTML: &str = r#"<html><body><a id="pic_container"><img id="page1" src="x"/></a></body></html>"#;
+    const UNAUTH_HTML: &str = r#"<html><body><header><div id="logo">x</div></header><main>please log in</main></body></html>"#;
+    const TRANSIENT_HTML: &str = "<html><body><p>we're sorry, the request file are not found.</p></body></html>";
+
+    #[tokio::test]
+    async fn recircuit_loop_ok_first_attempt() {
+        let mut recircuits = 0u32;
+        let mut fetches = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetches += 1;
+                async { Ok(OK_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok");
+        assert!(matches!(outcome, ChapterFetchOutcome::Ok(_)));
+        assert_eq!(fetches, 1);
+        assert_eq!(recircuits, 0);
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_unauth_with_single_attempt_returns_session_expired() {
+        // max_attempts=1 = TOR disabled, fail-fast on first Unauthenticated.
+        let mut recircuits = 0u32;
+        let mut fetches = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetches += 1;
+                async { Ok(UNAUTH_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            1,
+            "https://example/c",
+        )
+        .await
+        .expect("ok-result");
+        assert!(matches!(outcome, ChapterFetchOutcome::SessionExpired));
+        assert_eq!(fetches, 1);
+        assert_eq!(recircuits, 0, "no recircuit when budget is 1 (TOR disabled)");
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_unauth_then_ok_within_budget() {
+        // max_attempts=3 = up to 3 fetches with 2 recircuits between.
+        let mut recircuits = 0u32;
+        let mut fetch_n = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                let n = fetch_n;
+                async move {
+                    if n == 1 {
+                        Ok(UNAUTH_HTML.to_string())
+                    } else {
+                        Ok(OK_HTML.to_string())
+                    }
+                }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok");
+        assert!(matches!(outcome, ChapterFetchOutcome::Ok(_)));
+        assert_eq!(fetch_n, 2);
+        assert_eq!(recircuits, 1);
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_unauth_exhausts_budget_returns_session_expired() {
+        let mut recircuits = 0u32;
+        let mut fetch_n = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                async { Ok(UNAUTH_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok-result");
+        assert!(matches!(outcome, ChapterFetchOutcome::SessionExpired));
+        assert_eq!(fetch_n, 3, "max_attempts=3 → 3 fetches total");
+        assert_eq!(recircuits, 2, "2 recircuits between 3 fetches");
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_transient_then_ok_within_budget() {
+        let mut recircuits = 0u32;
+        let mut fetch_n = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                let n = fetch_n;
+                async move {
+                    if n < 3 {
+                        Ok(TRANSIENT_HTML.to_string())
+                    } else {
+                        Ok(OK_HTML.to_string())
+                    }
+                }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok");
+        assert!(matches!(outcome, ChapterFetchOutcome::Ok(_)));
+        assert_eq!(fetch_n, 3);
+        assert_eq!(recircuits, 2);
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_transient_exhausts_budget_returns_persistent() {
+        let mut recircuits = 0u32;
+        let mut fetch_n = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                async { Ok(TRANSIENT_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok-result");
+        assert!(matches!(outcome, ChapterFetchOutcome::PersistentTransient));
+        assert_eq!(fetch_n, 3, "max_attempts=3 → 3 fetches total");
+        assert_eq!(recircuits, 2, "2 recircuits between 3 fetches");
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_mixed_transient_then_unauth_then_ok_shares_budget() {
+        // Audit-prompted regression: outcomes share the attempt counter.
+        // Sequence: Transient (attempt 1) → Unauth (attempt 2) → Ok (3).
+        let mut recircuits = 0u32;
+        let mut fetch_n = 0u32;
+        let outcome = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                let n = fetch_n;
+                async move {
+                    match n {
+                        1 => Ok(TRANSIENT_HTML.to_string()),
+                        2 => Ok(UNAUTH_HTML.to_string()),
+                        _ => Ok(OK_HTML.to_string()),
+                    }
+                }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect("ok");
+        assert!(matches!(outcome, ChapterFetchOutcome::Ok(_)));
+        assert_eq!(fetch_n, 3);
+        assert_eq!(recircuits, 2);
+    }
+
+    #[tokio::test]
+    async fn recircuit_loop_propagates_fetch_errors() {
+        let mut fetch_n = 0u32;
+        let err = fetch_chapter_html_with_recircuit(
+            || {
+                fetch_n += 1;
+                async { Err(anyhow::anyhow!("nav timeout")) }
+            },
+            || async {},
+            3,
+            "https://example/c",
+        )
+        .await
+        .expect_err("fetch error bubbles");
+        assert_eq!(fetch_n, 1);
+        assert!(format!("{err:#}").contains("nav timeout"));
+    }
 }

backend/src/crawler/detect.rs

@@ -80,13 +80,36 @@ pub fn has_logo_sentinel(doc: &scraper::Html) -> bool {
 /// caller can fall back on the job system's retry/backoff once the
 /// inline budget is exhausted.
 pub async fn retry_on_transient<F, Fut, T>(
-    mut op: F,
+    op: F,
     max_attempts: u32,
     delay: Duration,
 ) -> Result<T, PageError>
 where
     F: FnMut() -> Fut,
     Fut: Future<Output = Result<T, PageError>>,
+{
+    retry_on_transient_with_hook(op, max_attempts, delay, || async {}).await
+}
+
+/// Like [`retry_on_transient`] but invokes `on_retry` between a
+/// transient failure and the subsequent sleep+retry. The hook does
+/// **not** fire on the first attempt, after a non-transient error, or
+/// after the final attempt (no retry follows). Hook failures are not
+/// propagated — return `()` from the future and log inside if needed.
+///
+/// Wire the TOR controller's `new_identity` here to rotate circuits
+/// between page-fetch retries; see [`crate::crawler::tor`].
+pub async fn retry_on_transient_with_hook<F, Fut, T, H, HFut>(
+    mut op: F,
+    max_attempts: u32,
+    delay: Duration,
+    mut on_retry: H,
+) -> Result<T, PageError>
+where
+    F: FnMut() -> Fut,
+    Fut: Future<Output = Result<T, PageError>>,
+    H: FnMut() -> HFut,
+    HFut: Future<Output = ()>,
 {
     debug_assert!(max_attempts >= 1, "max_attempts must be at least 1");
     let mut attempt = 0u32;
@@ -101,8 +124,9 @@ where
                     attempt,
                     max_attempts,
                     error = %e,
-                    "transient error; sleeping before retry"
+                    "transient error; running on-retry hook and sleeping before retry"
                 );
+                on_retry().await;
                 tokio::time::sleep(delay).await;
             }
         }
@@ -247,4 +271,92 @@ mod tests {
         assert_eq!(result.unwrap(), 7);
         assert_eq!(attempt, 1);
     }
+
+    #[tokio::test]
+    async fn hook_fires_once_between_transient_and_success() {
+        let mut attempt = 0u32;
+        let mut hook_calls = 0u32;
+        let result: Result<i32, PageError> = retry_on_transient_with_hook(
+            || {
+                attempt += 1;
+                let n = attempt;
+                async move {
+                    if n < 2 {
+                        Err(PageError::transient("once"))
+                    } else {
+                        Ok(99)
+                    }
+                }
+            },
+            5,
+            Duration::from_millis(0),
+            || {
+                hook_calls += 1;
+                async {}
+            },
+        )
+        .await;
+        assert_eq!(result.unwrap(), 99);
+        assert_eq!(attempt, 2);
+        assert_eq!(hook_calls, 1, "hook fires exactly once between attempts");
+    }
+
+    #[tokio::test]
+    async fn hook_does_not_fire_when_first_attempt_succeeds() {
+        let mut hook_calls = 0u32;
+        let result: Result<i32, PageError> = retry_on_transient_with_hook(
+            || async { Ok(1) },
+            5,
+            Duration::from_millis(0),
+            || {
+                hook_calls += 1;
+                async {}
+            },
+        )
+        .await;
+        assert!(result.is_ok());
+        assert_eq!(hook_calls, 0);
+    }
+
+    #[tokio::test]
+    async fn hook_does_not_fire_after_non_transient_error() {
+        let mut hook_calls = 0u32;
+        let result: Result<i32, PageError> = retry_on_transient_with_hook(
+            || async { Err(PageError::Other(anyhow::anyhow!("permanent"))) },
+            5,
+            Duration::from_millis(0),
+            || {
+                hook_calls += 1;
+                async {}
+            },
+        )
+        .await;
+        assert!(result.is_err());
+        assert_eq!(hook_calls, 0, "non-transient must short-circuit before hook");
+    }
+
+    #[tokio::test]
+    async fn hook_does_not_fire_after_final_failed_attempt() {
+        // With max_attempts=3 and three persistent transients, the hook
+        // should run twice (between 1→2 and 2→3) — never a third time,
+        // because no retry follows attempt 3.
+        let mut attempt = 0u32;
+        let mut hook_calls = 0u32;
+        let result: Result<i32, PageError> = retry_on_transient_with_hook(
+            || {
+                attempt += 1;
+                async { Err(PageError::transient("always")) }
+            },
+            3,
+            Duration::from_millis(0),
+            || {
+                hook_calls += 1;
+                async {}
+            },
+        )
+        .await;
+        assert!(result.is_err());
+        assert_eq!(attempt, 3);
+        assert_eq!(hook_calls, 2, "hook fires N-1 times for N attempts that all fail transient");
+    }
 }

backend/src/crawler/mod.rs

@@ -23,7 +23,9 @@ pub mod jobs;
 pub mod nav;
 pub mod pipeline;
 pub mod rate_limit;
+pub mod resync;
 pub mod safety;
 pub mod session;
 pub mod source;
+pub mod tor;
 pub mod url_utils;

backend/src/crawler/pipeline.rs

@@ -13,7 +13,7 @@ use crate::crawler::jobs::{self, EnqueueResult, JobPayload};
 use crate::crawler::rate_limit::HostRateLimiters;
 use crate::crawler::safety::{fetch_bytes_capped, looks_like_image, DownloadAllowlist};
 use crate::crawler::source::target::TargetSource;
-use crate::crawler::source::{FetchContext, Source};
+use crate::crawler::source::{FetchContext, Source, SourceMangaRef};
 use crate::repo;
 use crate::repo::crawler::UpsertStatus;
 use crate::storage::Storage;
@@ -103,6 +103,7 @@ pub async fn run_metadata_pass(
     skip_chapters: bool,
     allowlist: &DownloadAllowlist,
     max_image_bytes: usize,
+    tor: Option<&crate::crawler::tor::TorController>,
 ) -> anyhow::Result<MetadataStats> {
     let lease = browser_manager
         .acquire()
@@ -121,6 +122,7 @@ pub async fn run_metadata_pass(
     let ctx = FetchContext {
         browser: browser_ref,
         rate,
+        tor,
     };
 
     let source_id = source.id();
@@ -521,12 +523,133 @@ pub struct EnqueueSummary {
     pub failed: usize,
 }
 
+#[derive(Debug, Default, Clone, Copy)]
+pub struct CoverBackfillStats {
+    pub considered: usize,
+    pub fetched: usize,
+    pub failed: usize,
+}
+
+/// Default per-tick cap for [`backfill_missing_covers`]. The metadata pass
+/// already retries covers when its walk reaches the affected manga; this
+/// backfill exists to catch the residual case where the early-stop
+/// optimisation prevents the walk from reaching mangas whose cover failed
+/// on first attempt. A small cap is enough because the backlog only grows
+/// from sporadic download failures, not from systematic misses.
+pub const COVER_BACKFILL_DEFAULT_MAX: usize = 10;
+
+/// Re-attempt cover downloads for mangas where `cover_image_path IS NULL`
+/// but a live `manga_sources` row exists. Refetches the source detail
+/// page (which is where the cover URL lives) and downloads the cover.
+///
+/// Bounded by `max_mangas` per call so a steady stream of failing covers
+/// — e.g. a CDN host that's persistently 502 — can't monopolise a cron
+/// tick. Orders by `manga_sources.last_seen_at DESC` so the freshest
+/// missing-cover mangas are addressed first.
+///
+/// Failures are logged and counted, not raised: a single bad cover URL
+/// must not stall every other backfill behind it.
+#[allow(clippy::too_many_arguments)]
+pub async fn backfill_missing_covers(
+    browser_manager: &BrowserManager,
+    db: &PgPool,
+    storage: &dyn Storage,
+    http: &reqwest::Client,
+    rate: &HostRateLimiters,
+    max_mangas: usize,
+    allowlist: &DownloadAllowlist,
+    max_image_bytes: usize,
+    tor: Option<&crate::crawler::tor::TorController>,
+) -> anyhow::Result<CoverBackfillStats> {
+    let mut stats = CoverBackfillStats::default();
+    if max_mangas == 0 {
+        return Ok(stats);
+    }
+
+    let entries = repo::crawler::list_missing_covers(db, max_mangas as i64)
+        .await
+        .context("list_missing_covers")?;
+
+    if entries.is_empty() {
+        return Ok(stats);
+    }
+
+    let lease = browser_manager
+        .acquire()
+        .await
+        .context("acquire browser lease for cover backfill")?;
+    let browser_ref: &chromiumoxide::Browser = &lease;
+    let ctx = FetchContext { browser: browser_ref, rate, tor };
+
+    for entry in entries {
+        stats.considered += 1;
+        // Metadata-only TargetSource: skip chapter-list parsing so a
+        // missing-cover refetch doesn't soft-drop chapters on a partial
+        // render. Cover URL alone is what we need.
+        let source = TargetSource::new(entry.source_url.clone()).without_chapter_parsing();
+        let r = SourceMangaRef {
+            source_manga_key: entry.source_manga_key.clone(),
+            title: String::new(),
+            url: entry.source_url.clone(),
+        };
+        let cover_url = match source.fetch_manga(&ctx, &r).await {
+            Ok(manga) => manga.cover_url,
+            Err(e) => {
+                tracing::warn!(
+                    manga_id = %entry.manga_id,
+                    url = %entry.source_url,
+                    error = ?e,
+                    "cover backfill: fetch_manga failed"
+                );
+                stats.failed += 1;
+                continue;
+            }
+        };
+        let Some(cover_url) = cover_url else {
+            tracing::warn!(
+                manga_id = %entry.manga_id,
+                url = %entry.source_url,
+                "cover backfill: source returned no cover_url"
+            );
+            stats.failed += 1;
+            continue;
+        };
+        match download_and_store_cover(
+            db,
+            storage,
+            http,
+            rate,
+            &entry.source_url,
+            entry.manga_id,
+            &cover_url,
+            allowlist,
+            max_image_bytes,
+        )
+        .await
+        {
+            Ok(()) => stats.fetched += 1,
+            Err(e) => {
+                tracing::warn!(
+                    manga_id = %entry.manga_id,
+                    url = %entry.source_url,
+                    error = ?e,
+                    "cover backfill: download failed"
+                );
+                stats.failed += 1;
+            }
+        }
+    }
+
+    drop(lease);
+    Ok(stats)
+}
+
 /// Download a cover image and persist its storage path. Local to the
 /// pipeline because the CLI still calls it from its inline chapter-content
 /// loop; once the worker pool fully replaces that path we can fold this
 /// into `pipeline` proper.
 #[allow(clippy::too_many_arguments)]
-async fn download_and_store_cover(
+pub(crate) async fn download_and_store_cover(
     db: &PgPool,
     storage: &dyn Storage,
     http: &reqwest::Client,

backend/src/crawler/resync.rs

@@ -0,0 +1,277 @@
+//! Admin-triggered resync of a single manga's metadata + cover, or a
+//! single chapter's content.
+//!
+//! The cron tick already retries covers and chapter content on its own
+//! schedule. This module exists for the operator-controlled path:
+//! "this manga's metadata is stale / its cover never landed / this
+//! chapter is broken — pull from source now, not at the next daily
+//! tick." Wired into the admin API, never into the queue, so the work
+//! happens synchronously with the HTTP request and the admin sees the
+//! refreshed row in the response.
+//!
+//! Shares the daemon's [`BrowserManager`], rate limiter, HTTP client,
+//! and TOR controller so a force resync respects the same per-host
+//! pacing and recircuit budget the daily crawl uses — admin actions
+//! must not let an operator accidentally hammer the source.
+
+use std::sync::Arc;
+
+use anyhow::Context;
+use async_trait::async_trait;
+use sqlx::PgPool;
+use uuid::Uuid;
+
+use crate::crawler::browser_manager::BrowserManager;
+use crate::crawler::content::{self, SyncOutcome};
+use crate::crawler::pipeline;
+use crate::crawler::rate_limit::HostRateLimiters;
+use crate::crawler::safety::DownloadAllowlist;
+use crate::crawler::source::target::TargetSource;
+use crate::crawler::source::{FetchContext, Source, SourceMangaRef};
+use crate::crawler::tor::TorController;
+use crate::repo;
+use crate::repo::crawler::UpsertStatus;
+use crate::storage::Storage;
+
+/// Outcome of [`ResyncService::resync_manga`]. Mirrors the bits the
+/// admin UI cares about — was the row actually re-upserted, did the
+/// cover land — so the response can show "metadata refreshed, cover
+/// re-downloaded" or "metadata unchanged" without a second round-trip.
+#[derive(Debug, Clone, Copy)]
+pub struct MangaResyncOutcome {
+    pub manga_id: Uuid,
+    pub metadata_status: UpsertStatus,
+    pub cover_fetched: bool,
+}
+
+/// Outcome of [`ResyncService::resync_chapter`]. `Fetched(pages)` is the
+/// success case; `Skipped` means the source row was already gone or the
+/// chapter had no live source.
+#[derive(Debug, Clone)]
+pub enum ChapterResyncOutcome {
+    Fetched { chapter_id: Uuid, pages: usize },
+    Skipped { chapter_id: Uuid, reason: String },
+}
+
+/// Service exposed by the daemon to the admin API. Optional on
+/// [`AppState`] — `None` when the crawler daemon is disabled
+/// (`CRAWLER_DAEMON=false`), in which case admin handlers return 503.
+#[async_trait]
+pub trait ResyncService: Send + Sync {
+    async fn resync_manga(&self, manga_id: Uuid) -> anyhow::Result<MangaResyncOutcome>;
+    async fn resync_chapter(&self, chapter_id: Uuid) -> anyhow::Result<ChapterResyncOutcome>;
+}
+
+/// Errors with a stable shape so the API layer can map them to the
+/// right HTTP status (404 vs 422 vs 5xx). Anything else surfaces as a
+/// generic 500.
+#[derive(Debug, thiserror::Error)]
+pub enum ResyncError {
+    #[error("manga has no source to resync from")]
+    NoMangaSource,
+    #[error("chapter has no source to resync from")]
+    NoChapterSource,
+}
+
+pub struct RealResyncService {
+    pub browser_manager: Arc<BrowserManager>,
+    pub db: PgPool,
+    pub storage: Arc<dyn Storage>,
+    pub http: reqwest::Client,
+    pub rate: Arc<HostRateLimiters>,
+    pub download_allowlist: DownloadAllowlist,
+    pub max_image_bytes: usize,
+    pub tor: Option<Arc<TorController>>,
+}
+
+#[async_trait]
+impl ResyncService for RealResyncService {
+    async fn resync_manga(&self, manga_id: Uuid) -> anyhow::Result<MangaResyncOutcome> {
+        // Pick the freshest live source row. Multi-source mangas
+        // (theoretical — only one Source impl today) get the row whose
+        // `last_seen_at` is newest; soft-dropped rows are skipped.
+        let row: Option<(String, String, String)> = sqlx::query_as(
+            "SELECT source_id, source_manga_key, source_url \
+               FROM manga_sources \
+              WHERE manga_id = $1 AND dropped_at IS NULL \
+              ORDER BY last_seen_at DESC \
+              LIMIT 1",
+        )
+        .bind(manga_id)
+        .fetch_optional(&self.db)
+        .await
+        .context("look up manga_sources for resync")?;
+        let Some((_source_id, source_manga_key, source_url)) = row else {
+            return Err(ResyncError::NoMangaSource.into());
+        };
+
+        let lease = self
+            .browser_manager
+            .acquire()
+            .await
+            .context("acquire browser lease for manga resync")?;
+        let browser_ref: &chromiumoxide::Browser = &lease;
+        let ctx = FetchContext {
+            browser: browser_ref,
+            rate: &self.rate,
+            tor: self.tor.as_deref(),
+        };
+
+        // Parse chapters too — a force resync is "make this manga fully
+        // current," not just metadata. The full pipeline handles the
+        // partial-render guard for us; we replicate the same caution
+        // here by skipping the chapter sync when the parser returned
+        // empty but the manga previously had chapters.
+        let source = TargetSource::new(source_url.clone());
+        let r = SourceMangaRef {
+            source_manga_key: source_manga_key.clone(),
+            title: String::new(),
+            url: source_url.clone(),
+        };
+        let manga = source
+            .fetch_manga(&ctx, &r)
+            .await
+            .with_context(|| format!("fetch_manga during resync of {manga_id}"))?;
+
+        // Partial-render guard: same logic as run_metadata_pass.
+        let source_id = source.id();
+        if !manga.chapters.is_empty() || {
+            let prior = repo::crawler::live_chapter_count_for_source_manga(
+                &self.db,
+                source_id,
+                &source_manga_key,
+            )
+            .await
+            .unwrap_or(0);
+            prior == 0
+        } {
+            // Either the new fetch surfaced chapters, or there were
+            // none before either — chapter sync is safe to run.
+        } else {
+            tracing::warn!(
+                %manga_id,
+                source_url = %source_url,
+                "resync_manga: fetch returned empty chapters but prior count > 0; skipping chapter sync to avoid soft-drop"
+            );
+        }
+
+        let upsert = repo::crawler::upsert_manga_from_source(
+            &self.db,
+            source_id,
+            &source_url,
+            &manga,
+        )
+        .await
+        .with_context(|| format!("upsert_manga_from_source during resync of {manga_id}"))?;
+
+        // Cover refetch: force-download regardless of UpsertStatus.
+        // Admin clicked "resync" because they want the cover too.
+        let mut cover_fetched = false;
+        if let Some(cover_url) = manga.cover_url.as_deref() {
+            match pipeline::download_and_store_cover(
+                &self.db,
+                self.storage.as_ref(),
+                &self.http,
+                &self.rate,
+                &source_url,
+                upsert.manga_id,
+                cover_url,
+                &self.download_allowlist,
+                self.max_image_bytes,
+            )
+            .await
+            {
+                Ok(()) => cover_fetched = true,
+                Err(e) => tracing::warn!(
+                    %manga_id,
+                    error = ?e,
+                    "resync_manga: cover download failed"
+                ),
+            }
+        }
+
+        // Chapter sync — only when the partial-render guard above
+        // didn't bail.
+        let prior_chapter_count = repo::crawler::live_chapter_count_for_source_manga(
+            &self.db,
+            source_id,
+            &source_manga_key,
+        )
+        .await
+        .unwrap_or(0);
+        if !manga.chapters.is_empty() || prior_chapter_count == 0 {
+            match repo::crawler::sync_manga_chapters(
+                &self.db,
+                source_id,
+                upsert.manga_id,
+                &manga.chapters,
+            )
+            .await
+            {
+                Ok(diff) => tracing::info!(
+                    %manga_id,
+                    new = diff.new,
+                    refreshed = diff.refreshed,
+                    dropped = diff.dropped,
+                    "resync_manga: chapters synced"
+                ),
+                Err(e) => tracing::warn!(
+                    %manga_id,
+                    error = ?e,
+                    "resync_manga: chapter sync failed"
+                ),
+            }
+        }
+
+        drop(lease);
+        Ok(MangaResyncOutcome {
+            manga_id: upsert.manga_id,
+            metadata_status: upsert.status,
+            cover_fetched,
+        })
+    }
+
+    async fn resync_chapter(&self, chapter_id: Uuid) -> anyhow::Result<ChapterResyncOutcome> {
+        let row = repo::chapter::dispatch_target(&self.db, chapter_id)
+            .await
+            .context("look up chapter_sources for resync")?;
+        let Some((manga_id, source_url)) = row else {
+            return Err(ResyncError::NoChapterSource.into());
+        };
+
+        let lease = self
+            .browser_manager
+            .acquire()
+            .await
+            .context("acquire browser lease for chapter resync")?;
+        let result = content::sync_chapter_content(
+            &lease,
+            &self.db,
+            self.storage.as_ref(),
+            &self.http,
+            &self.rate,
+            chapter_id,
+            manga_id,
+            &source_url,
+            true,
+            &self.download_allowlist,
+            self.max_image_bytes,
+            self.tor.as_deref(),
+        )
+        .await;
+        drop(lease);
+
+        match result? {
+            SyncOutcome::Fetched { pages } => {
+                Ok(ChapterResyncOutcome::Fetched { chapter_id, pages })
+            }
+            SyncOutcome::Skipped => Ok(ChapterResyncOutcome::Skipped {
+                chapter_id,
+                reason: "chapter already had pages on disk".to_string(),
+            }),
+            SyncOutcome::SessionExpired => {
+                anyhow::bail!("source session expired — operator must refresh PHPSESSID")
+            }
+        }
+    }
+}

backend/src/crawler/session.rs

@@ -162,38 +162,124 @@ const PROBE_RETRY_DELAY: Duration = Duration::from_secs(2);
 /// limiter. The trade is worth it — failing here costs ~1s; failing 30
 /// minutes into a backfill costs 30 minutes.
 pub async fn verify_session(browser: &Browser, probe_url: &str) -> anyhow::Result<()> {
-    let mut attempt = 0u32;
+    verify_session_with_recircuit(browser, probe_url, None, 0).await
+}
+
+/// Like [`verify_session`] but, when `tor` is `Some`, signals
+/// `SIGNAL NEWNYM` between retries on transient pages AND treats
+/// `Unauthenticated` as recoverable (up to `tor_max_attempts` total
+/// probes, calling NEWNYM between each).
+///
+/// `verify_session` is `verify_session_with_recircuit(..., None, _)`,
+/// which collapses the `Unauthenticated` budget to 1 attempt — i.e.
+/// fail-fast, exactly the pre-TOR behavior.
+pub async fn verify_session_with_recircuit(
+    browser: &Browser,
+    probe_url: &str,
+    tor: Option<&crate::crawler::tor::TorController>,
+    tor_max_attempts: u32,
+) -> anyhow::Result<()> {
+    let unauth_max_attempts = if tor.is_some() { tor_max_attempts.max(1) } else { 1 };
+    run_session_probe_loop(
+        || fetch_probe_html(browser, probe_url),
+        || async {
+            if let Some(t) = tor {
+                if let Err(e) = t.new_identity().await {
+                    tracing::warn!(error = %e, "TOR NEWNYM failed; continuing with same circuit");
+                }
+            }
+        },
+        PROBE_MAX_ATTEMPTS,
+        unauth_max_attempts,
+        PROBE_RETRY_DELAY,
+        probe_url,
+    )
+    .await
+}
+
+/// Pure-over-IO loop body for the session probe. Generic over the
+/// fetch and recircuit closures so it can be unit-tested without a
+/// real browser or TOR daemon.
+///
+/// Both budgets count **total attempts**, including the first — so
+/// `transient_max_attempts = 3` allows 3 fetches and 2 recircuits
+/// between them, and `unauth_max_attempts = 1` means "fail-fast, no
+/// retry". This matches [`crate::crawler::detect::retry_on_transient`]
+/// and the content-path recircuit loop.
+///
+/// Outcomes:
+/// - `SessionProbe::Ok` → return `Ok(())`.
+/// - `SessionProbe::Unauthenticated` → recircuit + retry while
+///   under the unauth budget. After the cap, bail with the
+///   "PHPSESSID expired" diagnostic, mentioning the attempt count so
+///   a TOR-misconfig diagnosis is easier.
+/// - `SessionProbe::Transient` → same shape against the transient
+///   budget; bails with "site down or rate-limiting" after the cap.
+async fn run_session_probe_loop<F, Fut, R, RFut>(
+    mut fetch_html: F,
+    mut recircuit: R,
+    transient_max_attempts: u32,
+    unauth_max_attempts: u32,
+    retry_delay: Duration,
+    probe_url_for_msg: &str,
+) -> anyhow::Result<()>
+where
+    F: FnMut() -> Fut,
+    Fut: std::future::Future<Output = anyhow::Result<String>>,
+    R: FnMut() -> RFut,
+    RFut: std::future::Future<Output = ()>,
+{
+    debug_assert!(transient_max_attempts >= 1);
+    debug_assert!(unauth_max_attempts >= 1);
+    let mut transient_attempts = 0u32;
+    let mut unauth_attempts = 0u32;
     loop {
-        attempt += 1;
+        let html = fetch_html().await?;
-        let html = fetch_probe_html(browser, probe_url).await?;
         match classify_probe(&html) {
             SessionProbe::Ok => {
-                tracing::info!(attempt, "session probe ok — #logo + #avatar_menu present");
+                tracing::info!(
+                    transient_attempts,
+                    unauth_attempts,
+                    "session probe ok — #logo + #avatar_menu present"
+                );
                 return Ok(());
             }
             SessionProbe::Unauthenticated => {
+                unauth_attempts += 1;
+                if unauth_attempts >= unauth_max_attempts {
                     return Err(anyhow!(
-                    "session probe failed — #avatar_menu not present at {probe_url} \
+                        "session probe failed — #avatar_menu not present at {probe_url_for_msg} \
-                     (page rendered the normal layout); PHPSESSID is missing, expired, \
+                         after {unauth_attempts} attempt(s); PHPSESSID is missing, \
-                     or revoked. Refresh CRAWLER_PHPSESSID and re-run."
+                         expired, or revoked. Refresh CRAWLER_PHPSESSID and re-run."
                     ));
                 }
-            SessionProbe::Transient if attempt < PROBE_MAX_ATTEMPTS => {
                 tracing::warn!(
-                    attempt,
+                    attempt = unauth_attempts,
-                    max_attempts = PROBE_MAX_ATTEMPTS,
+                    max_attempts = unauth_max_attempts,
-                    "session probe got a transient page; retrying"
+                    "session probe Unauthenticated despite PHPSESSID; signaling TOR \
+                     NEWNYM and retrying"
                 );
-                tokio::time::sleep(PROBE_RETRY_DELAY).await;
+                recircuit().await;
+                tokio::time::sleep(retry_delay).await;
             }
             SessionProbe::Transient => {
+                transient_attempts += 1;
+                if transient_attempts >= transient_max_attempts {
                     return Err(anyhow!(
-                    "session probe failed — probe page at {probe_url} returned a \
+                        "session probe failed — probe page at {probe_url_for_msg} returned \
-                     broken-page response after {PROBE_MAX_ATTEMPTS} attempts. \
+                         a broken-page response after {transient_max_attempts} attempts. \
                          The site appears to be down or rate-limiting us; try again \
                          later before refreshing CRAWLER_PHPSESSID."
                     ));
                 }
+                tracing::warn!(
+                    attempt = transient_attempts,
+                    max_attempts = transient_max_attempts,
+                    "session probe got a transient page; recircuit + retry"
+                );
+                recircuit().await;
+                tokio::time::sleep(retry_delay).await;
+            }
         }
     }
 }
@@ -336,6 +422,204 @@ mod tests {
         assert_eq!(classify_chapter_probe(html), ChapterProbe::Ok);
     }
 
+    // --- run_session_probe_loop -----------------------------------------
+    //
+    // These tests exercise the recircuit-aware loop without a real
+    // browser. The fetch and recircuit closures are mocked over Vecs of
+    // canned outcomes / counters.
+
+    const OK_HTML: &str = r#"<html><body><div id="logo"></div><div id="avatar_menu"></div></body></html>"#;
+    const UNAUTH_HTML: &str = r#"<html><body><div id="logo"></div></body></html>"#;
+    const TRANSIENT_HTML: &str = "<html><body><p>we're sorry, the request file are not found.</p></body></html>";
+
+    #[tokio::test]
+    async fn probe_loop_ok_on_first_attempt_does_not_recircuit() {
+        let mut recircuits = 0u32;
+        let mut fetched = 0u32;
+        run_session_probe_loop(
+            || {
+                fetched += 1;
+                async { Ok(OK_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            3,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect("ok on first attempt");
+        assert_eq!(fetched, 1);
+        assert_eq!(recircuits, 0);
+    }
+
+    #[tokio::test]
+    async fn probe_loop_unauth_then_ok_when_attempt_budget_available() {
+        // Budget = 3 total attempts. Unauth on call 1, ok on call 2.
+        let mut recircuits = 0u32;
+        let mut call = 0u32;
+        run_session_probe_loop(
+            || {
+                call += 1;
+                let n = call;
+                async move {
+                    if n == 1 {
+                        Ok(UNAUTH_HTML.to_string())
+                    } else {
+                        Ok(OK_HTML.to_string())
+                    }
+                }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            3,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect("recovers after one recircuit");
+        assert_eq!(call, 2);
+        assert_eq!(recircuits, 1);
+    }
+
+    #[tokio::test]
+    async fn probe_loop_unauth_with_single_attempt_budget_fails_fast() {
+        // Budget = 1 total attempt = no retry (matches no-TOR behavior).
+        let mut recircuits = 0u32;
+        let mut call = 0u32;
+        let err = run_session_probe_loop(
+            || {
+                call += 1;
+                async { Ok(UNAUTH_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            1,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect_err("budget=1 → fail-fast");
+        assert_eq!(call, 1, "no retry when budget is 1");
+        assert_eq!(recircuits, 0);
+        let msg = format!("{err:#}");
+        assert!(msg.contains("Refresh CRAWLER_PHPSESSID"), "msg: {msg}");
+        assert!(msg.contains("after 1 attempt"), "expected attempt count in msg: {msg}");
+    }
+
+    #[tokio::test]
+    async fn probe_loop_unauth_after_exhausting_budget_emits_attempt_count() {
+        let mut recircuits = 0u32;
+        let mut call = 0u32;
+        let err = run_session_probe_loop(
+            || {
+                call += 1;
+                async { Ok(UNAUTH_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            10, // transient budget irrelevant here
+            3,  // 3 attempts total, 2 recircuits between
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect_err("exhausts unauth budget");
+        assert_eq!(call, 3);
+        assert_eq!(recircuits, 2);
+        let msg = format!("{err:#}");
+        assert!(msg.contains("after 3 attempt"), "expected attempt count in error, got: {msg}");
+    }
+
+    #[tokio::test]
+    async fn probe_loop_transient_repeats_until_max_then_errors() {
+        let mut recircuits = 0u32;
+        let mut call = 0u32;
+        let err = run_session_probe_loop(
+            || {
+                call += 1;
+                async { Ok(TRANSIENT_HTML.to_string()) }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            1,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect_err("transient until max → fail");
+        assert_eq!(call, 3);
+        // Recircuit fires between attempts: 3 attempts → 2 recircuits.
+        assert_eq!(recircuits, 2);
+        let msg = format!("{err:#}");
+        assert!(msg.contains("broken-page response after 3 attempts"), "msg: {msg}");
+    }
+
+    #[tokio::test]
+    async fn probe_loop_transient_then_ok_returns_ok_after_one_recircuit() {
+        let mut recircuits = 0u32;
+        let mut call = 0u32;
+        run_session_probe_loop(
+            || {
+                call += 1;
+                let n = call;
+                async move {
+                    if n == 1 {
+                        Ok(TRANSIENT_HTML.to_string())
+                    } else {
+                        Ok(OK_HTML.to_string())
+                    }
+                }
+            },
+            || {
+                recircuits += 1;
+                async {}
+            },
+            3,
+            1,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect("ok on second try");
+        assert_eq!(call, 2);
+        assert_eq!(recircuits, 1);
+    }
+
+    #[tokio::test]
+    async fn probe_loop_propagates_fetch_errors_immediately() {
+        let mut call = 0u32;
+        let err = run_session_probe_loop(
+            || {
+                call += 1;
+                async { Err(anyhow!("nav timeout")) }
+            },
+            || async {},
+            5,
+            5,
+            Duration::from_millis(0),
+            "https://example/probe",
+        )
+        .await
+        .expect_err("fetch error bubbles");
+        assert_eq!(call, 1);
+        assert!(format!("{err:#}").contains("nav timeout"));
+    }
+
     #[test]
     fn classify_probe_trusts_broken_body_over_stray_avatar_match() {
         // Defensive: if a broken-page body somehow contains an

backend/src/crawler/source.rs

@@ -67,6 +67,10 @@ pub struct SourceChapter {
 pub struct FetchContext<'a> {
     pub browser: &'a Browser,
     pub rate: &'a crate::crawler::rate_limit::HostRateLimiters,
+    /// Optional TOR control-port client. When `Some`, retry helpers
+    /// signal `NEWNYM` between transient-page attempts so the next try
+    /// draws a fresh exit. `None` keeps pre-TOR behavior.
+    pub tor: Option<&'a crate::crawler::tor::TorController>,
 }
 
 /// Lazy iterator over discovered manga refs. The caller drives the

backend/src/crawler/source/target.rs

@@ -18,7 +18,7 @@ use super::{
     SourceMangaRef,
 };
 use crate::crawler::detect::{
-    has_logo_sentinel, is_broken_page_body, retry_on_transient, PageError,
+    has_logo_sentinel, is_broken_page_body, retry_on_transient_with_hook, PageError,
 };
 use crate::crawler::nav::{wait_for_nav, wait_for_selector, NavError, SELECTOR_TIMEOUT};
 
@@ -79,12 +79,13 @@ impl Source for TargetSource {
         // and the HTML is handed straight to the first `next_batch` call
         // so the walker doesn't re-fetch it. Page count is discovered
         // incrementally — see `TargetSourceWalker::next_batch`.
-        let first_html = retry_on_transient(
+        let first_html = retry_on_transient_with_hook(
             || async {
                 navigate(ctx, self.base_url.as_str(), LIST_PAGE_MARKER).await
             },
             PAGE_TRANSIENT_RETRY_ATTEMPTS,
             PAGE_TRANSIENT_RETRY_DELAY,
+            || async { recircuit_if_configured(ctx.tor).await },
         )
         .await?;
 
@@ -169,7 +170,7 @@ impl DiscoverWalk for TargetSourceWalker {
                     parse_manga_list_from(&doc)?
                 }
                 None => {
-                    retry_on_transient(
+                    retry_on_transient_with_hook(
                         || async {
                             let html = navigate(
                                 ctx,
@@ -182,12 +183,13 @@ impl DiscoverWalk for TargetSourceWalker {
                         },
                         PAGE_TRANSIENT_RETRY_ATTEMPTS,
                         PAGE_TRANSIENT_RETRY_DELAY,
+                        || async { recircuit_if_configured(ctx.tor).await },
                     )
                     .await?
                 }
             }
         } else {
-            retry_on_transient(
+            retry_on_transient_with_hook(
                 || async {
                     let url = page_url(&self.base_url, page_num);
                     let html = navigate(ctx, &url, LIST_PAGE_MARKER).await?;
@@ -196,6 +198,7 @@ impl DiscoverWalk for TargetSourceWalker {
                 },
                 PAGE_TRANSIENT_RETRY_ATTEMPTS,
                 PAGE_TRANSIENT_RETRY_DELAY,
+                || async { recircuit_if_configured(ctx.tor).await },
             )
             .await?
         };
@@ -274,6 +277,20 @@ fn classify_navigate_html(html: String) -> Result<String, PageError> {
     Ok(html)
 }
 
+/// Hook for [`retry_on_transient_with_hook`]: when TOR is configured,
+/// signal `NEWNYM` so the next navigation draws a fresh exit. Errors
+/// from the controller are logged and swallowed — failing to recircuit
+/// shouldn't take down the crawl, the next attempt just runs on the
+/// same circuit as before.
+async fn recircuit_if_configured(tor: Option<&crate::crawler::tor::TorController>) {
+    if let Some(t) = tor {
+        if let Err(e) = t.new_identity().await {
+            tracing::warn!(error = %e, "TOR NEWNYM failed; retrying on same circuit");
+        }
+    }
+}
+
+
 /// Substitutes the first `/N/` path segment with the target page
 /// number. Source impls that paginate via a different URL shape can
 /// override this — for the modeled site the segment is always present.

backend/src/crawler/tor.rs

@@ -0,0 +1,446 @@
+//! TOR control-port client for `SIGNAL NEWNYM` ("recircuit").
+//!
+//! The crawler can be proxied through TOR (`CRAWLER_PROXY=socks5h://tor:9050`)
+//! to randomize the exit IP seen by the target site. When the target
+//! returns a "bad page" (its broken-template body, missing layout
+//! sentinel, or unauthenticated probe despite a valid PHPSESSID), it
+//! is often the current exit being rate-limited or fingerprinted rather
+//! than a real failure. Asking the local TOR daemon for a new identity
+//! over its control port (port 9051 by default) makes subsequent
+//! connections draw a fresh circuit; combined with `IsolateDestAddr`
+//! in torrc this is usually enough to clear the failure.
+//!
+//! Scope is deliberately tiny — `AUTHENTICATE` + `SIGNAL NEWNYM` over
+//! a one-shot TCP connection. No `torut` dep, no hidden-service
+//! plumbing, no event streaming.
+//!
+//! **Caveat for in-flight connections:** Chromium reuses sockets, so a
+//! `NEWNYM` only affects *new* connections (in TOR terms, new circuits).
+//! That's fine for our retry path — the next navigation opens a fresh
+//! connection. We do not try to forcibly close existing streams.
+
+use std::path::{Path, PathBuf};
+use std::time::Duration;
+
+use anyhow::{anyhow, bail, Context};
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+use tokio::net::TcpStream;
+use tokio::time::timeout;
+
+/// Default control-port (`tor --defaults-torrc` ships 9051).
+const DEFAULT_CONTROL_PORT: u16 = 9051;
+/// Connect timeout — generous enough for a slow compose start, short
+/// enough that a misconfigured controller doesn't stall a crawl.
+const CONNECT_TIMEOUT: Duration = Duration::from_secs(5);
+/// Per-command read timeout. `SIGNAL NEWNYM` returns instantly on the
+/// happy path; bound it so a half-broken control port can't hang us.
+const READ_TIMEOUT: Duration = Duration::from_secs(5);
+
+/// How the controller authenticates to the control port.
+///
+/// `Cookie` is preferred for compose deploys where the auth cookie file
+/// is shared between the `tor` and `backend` containers via a named
+/// volume. `Password` is the fallback when the cookie file isn't
+/// reachable (different gid, no shared volume, etc.). `None` matches a
+/// torrc with no `CookieAuthentication 1` and no `HashedControlPassword`
+/// — useful for local experimentation, not for production.
+///
+/// `Debug` is implemented manually to redact the password (and the
+/// cookie path, which is non-sensitive but uninteresting in logs).
+/// Don't add `#[derive(Debug)]` — the controller is `?`-logged at
+/// startup and a derive would expand the password into the trace.
+#[derive(Clone)]
+pub enum TorAuth {
+    None,
+    Password(String),
+    Cookie(PathBuf),
+}
+
+impl std::fmt::Debug for TorAuth {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            TorAuth::None => f.write_str("None"),
+            TorAuth::Password(_) => f.write_str("Password(<redacted>)"),
+            TorAuth::Cookie(_) => f.write_str("Cookie(<path>)"),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct TorController {
+    /// `host:port` string. Kept as a string (not a `SocketAddr`) so
+    /// docker-compose hostnames like `tor:9051` resolve at connect time.
+    addr: String,
+    auth: TorAuth,
+}
+
+impl TorController {
+    pub fn new(addr: impl Into<String>, auth: TorAuth) -> Self {
+        Self { addr: addr.into(), auth }
+    }
+
+    /// Build a controller from the env-config shape:
+    /// `url` (e.g. `tcp://tor:9051`, `127.0.0.1:9051`, or `tor`),
+    /// optional password, optional cookie path. Returns `Ok(None)` when
+    /// `url` is absent — that's the "TOR feature disabled" signal.
+    /// Cookie wins over password when both are set (rotates with TOR;
+    /// no secret to manage).
+    pub fn from_parts(
+        url: Option<&str>,
+        password: Option<&str>,
+        cookie_path: Option<&Path>,
+    ) -> anyhow::Result<Option<Self>> {
+        let Some(url) = url else { return Ok(None) };
+        let addr = parse_control_url(url)?;
+        let auth = match (cookie_path, password) {
+            (Some(p), _) => TorAuth::Cookie(p.to_path_buf()),
+            (None, Some(p)) => TorAuth::Password(p.to_string()),
+            (None, None) => TorAuth::None,
+        };
+        Ok(Some(Self { addr, auth }))
+    }
+
+    /// Open the control port, `AUTHENTICATE`, `SIGNAL NEWNYM`, `QUIT`.
+    /// Each invocation is a fresh connection; the controller is cheap
+    /// to clone and stateless across calls.
+    pub async fn new_identity(&self) -> anyhow::Result<()> {
+        let stream = timeout(CONNECT_TIMEOUT, TcpStream::connect(&self.addr))
+            .await
+            .with_context(|| {
+                format!("timed out connecting to TOR control port {}", self.addr)
+            })?
+            .with_context(|| format!("connect to TOR control port {}", self.addr))?;
+        let (read, mut write) = stream.into_split();
+        let mut read = BufReader::new(read);
+
+        let auth_line = self.build_auth_line().await?;
+        write_line(&mut write, &auth_line).await?;
+        timeout(READ_TIMEOUT, expect_250(&mut read))
+            .await
+            .map_err(|_| anyhow!("TOR control AUTHENTICATE timed out"))?
+            .context("AUTHENTICATE")?;
+
+        write_line(&mut write, "SIGNAL NEWNYM").await?;
+        timeout(READ_TIMEOUT, expect_250(&mut read))
+            .await
+            .map_err(|_| anyhow!("TOR control SIGNAL NEWNYM timed out"))?
+            .context("SIGNAL NEWNYM")?;
+
+        // QUIT is courtesy; ignore errors — the daemon may close the
+        // socket before our QUIT lands and that's perfectly fine.
+        let _ = write_line(&mut write, "QUIT").await;
+        // Debug-level: a busy crawl can rotate circuits many times per
+        // minute, INFO is too chatty. Failures still log at WARN.
+        tracing::debug!(addr = %self.addr, "TOR NEWNYM signaled");
+        Ok(())
+    }
+
+    async fn build_auth_line(&self) -> anyhow::Result<String> {
+        match &self.auth {
+            TorAuth::None => Ok("AUTHENTICATE".to_string()),
+            TorAuth::Password(p) => Ok(format!("AUTHENTICATE \"{}\"", escape_quoted(p))),
+            TorAuth::Cookie(path) => {
+                let bytes = tokio::fs::read(path)
+                    .await
+                    .with_context(|| format!("read TOR cookie file {}", path.display()))?;
+                Ok(format!("AUTHENTICATE {}", hex_encode(&bytes)))
+            }
+        }
+    }
+}
+
+/// Parse `tcp://host:port`, `host:port`, or bare `host` into a
+/// connect-time string. Default port is [`DEFAULT_CONTROL_PORT`].
+fn parse_control_url(url: &str) -> anyhow::Result<String> {
+    let stripped = url.strip_prefix("tcp://").unwrap_or(url);
+    if stripped.is_empty() {
+        bail!("TOR control url is empty");
+    }
+    if stripped.contains(':') {
+        Ok(stripped.to_string())
+    } else {
+        Ok(format!("{stripped}:{DEFAULT_CONTROL_PORT}"))
+    }
+}
+
+fn escape_quoted(s: &str) -> String {
+    s.replace('\\', r"\\").replace('"', r#"\""#)
+}
+
+fn hex_encode(bytes: &[u8]) -> String {
+    let mut s = String::with_capacity(bytes.len() * 2);
+    for b in bytes {
+        s.push_str(&format!("{b:02x}"));
+    }
+    s
+}
+
+async fn write_line<W: tokio::io::AsyncWrite + Unpin>(
+    w: &mut W,
+    line: &str,
+) -> anyhow::Result<()> {
+    w.write_all(line.as_bytes()).await?;
+    w.write_all(b"\r\n").await?;
+    w.flush().await?;
+    Ok(())
+}
+
+/// Drain a TOR control reply, accepting only status `250`. Handles
+/// the protocol's three line forms: `XYZ ...` (single/end), `XYZ-...`
+/// (continuation), `XYZ+...` (data block ended by a lone `.`). Our
+/// commands only ever produce single-line `250 OK`, but we honor the
+/// continuation forms so a future torrc that adds events / banners
+/// doesn't confuse the parser.
+async fn expect_250<R: AsyncBufReadExt + Unpin>(r: &mut R) -> anyhow::Result<()> {
+    loop {
+        let mut line = String::new();
+        let n = r.read_line(&mut line).await?;
+        if n == 0 {
+            bail!("TOR control port closed connection mid-reply");
+        }
+        let trimmed = line.trim_end_matches(['\r', '\n']);
+        if trimmed.len() < 4 {
+            bail!("malformed TOR control reply: {trimmed:?}");
+        }
+        let (code, rest) = trimmed.split_at(3);
+        if code != "250" {
+            bail!("TOR control replied {trimmed:?}");
+        }
+        let sep = rest.as_bytes()[0];
+        match sep {
+            b' ' => return Ok(()),
+            b'-' => continue,
+            b'+' => {
+                // Data block — read until a line consisting of only ".".
+                loop {
+                    let mut data = String::new();
+                    let n = r.read_line(&mut data).await?;
+                    if n == 0 {
+                        bail!("TOR control port closed mid-data-block");
+                    }
+                    if data.trim_end_matches(['\r', '\n']) == "." {
+                        break;
+                    }
+                }
+            }
+            _ => bail!("malformed TOR control reply separator: {trimmed:?}"),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::{Arc, Mutex};
+    use tokio::io::AsyncWriteExt;
+    use tokio::net::TcpListener;
+
+    /// Spawn a mock control port that responds to each \r\n-terminated
+    /// inbound line with the next entry from `replies`. Each reply has
+    /// its own `\r\n` appended. Records received lines into `recorder`.
+    /// After `replies.len()` exchanges the task drops the socket — this
+    /// matches the real TOR behavior for QUIT (close after acking).
+    async fn spawn_mock(
+        replies: Vec<&'static str>,
+        recorder: Arc<Mutex<Vec<String>>>,
+    ) -> String {
+        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
+        let addr = listener.local_addr().unwrap().to_string();
+        tokio::spawn(async move {
+            let (sock, _) = listener.accept().await.unwrap();
+            let (r, mut w) = sock.into_split();
+            let mut r = BufReader::new(r);
+            for reply in replies {
+                let mut line = String::new();
+                let n = r.read_line(&mut line).await.unwrap_or(0);
+                if n == 0 {
+                    return;
+                }
+                recorder
+                    .lock()
+                    .unwrap()
+                    .push(line.trim_end_matches(['\r', '\n']).to_string());
+                w.write_all(reply.as_bytes()).await.unwrap();
+                w.write_all(b"\r\n").await.unwrap();
+                w.flush().await.unwrap();
+            }
+        });
+        addr
+    }
+
+    #[tokio::test]
+    async fn password_auth_then_newnym_writes_expected_sequence() {
+        let recorder = Arc::new(Mutex::new(Vec::new()));
+        // Two replies: AUTHENTICATE then SIGNAL NEWNYM. QUIT is
+        // fire-and-forget; the mock dropping the socket is the
+        // expected real-world behavior.
+        let addr =
+            spawn_mock(vec!["250 OK", "250 OK"], Arc::clone(&recorder)).await;
+        let controller = TorController::new(addr, TorAuth::Password("secret".into()));
+        controller.new_identity().await.expect("new_identity ok");
+        let recorded = recorder.lock().unwrap().clone();
+        assert_eq!(recorded.first().map(String::as_str), Some("AUTHENTICATE \"secret\""));
+        assert_eq!(recorded.get(1).map(String::as_str), Some("SIGNAL NEWNYM"));
+    }
+
+    #[tokio::test]
+    async fn cookie_auth_hex_encodes_file_bytes() {
+        let tmp = tempfile::NamedTempFile::new().unwrap();
+        let cookie: Vec<u8> = (0u8..32).collect();
+        std::fs::write(tmp.path(), &cookie).unwrap();
+        let recorder = Arc::new(Mutex::new(Vec::new()));
+        let addr =
+            spawn_mock(vec!["250 OK", "250 OK"], Arc::clone(&recorder)).await;
+        let controller =
+            TorController::new(addr, TorAuth::Cookie(tmp.path().to_path_buf()));
+        controller.new_identity().await.expect("new_identity ok");
+        let recorded = recorder.lock().unwrap().clone();
+        let expected_hex: String = cookie.iter().map(|b| format!("{b:02x}")).collect();
+        assert_eq!(
+            recorded.first().map(String::as_str),
+            Some(format!("AUTHENTICATE {expected_hex}").as_str())
+        );
+    }
+
+    #[tokio::test]
+    async fn no_auth_sends_bare_authenticate() {
+        let recorder = Arc::new(Mutex::new(Vec::new()));
+        let addr =
+            spawn_mock(vec!["250 OK", "250 OK"], Arc::clone(&recorder)).await;
+        let controller = TorController::new(addr, TorAuth::None);
+        controller.new_identity().await.expect("new_identity ok");
+        let recorded = recorder.lock().unwrap().clone();
+        assert_eq!(recorded.first().map(String::as_str), Some("AUTHENTICATE"));
+    }
+
+    #[tokio::test]
+    async fn non_250_reply_returns_err_with_reply_text() {
+        let recorder = Arc::new(Mutex::new(Vec::new()));
+        let addr = spawn_mock(
+            vec!["515 Bad authentication"],
+            Arc::clone(&recorder),
+        )
+        .await;
+        let controller =
+            TorController::new(addr, TorAuth::Password("wrong".into()));
+        let err = controller.new_identity().await.expect_err("should fail");
+        let msg = format!("{err:#}");
+        assert!(msg.contains("515"), "expected 515 in error, got: {msg}");
+    }
+
+    #[tokio::test]
+    async fn closed_connection_mid_reply_is_an_error() {
+        // Listener accepts the AUTH line then drops without replying —
+        // this exercises the EOF-mid-reply path in expect_250 (rather
+        // than tor's own error replies which are covered elsewhere).
+        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
+        let addr = listener.local_addr().unwrap().to_string();
+        tokio::spawn(async move {
+            if let Ok((sock, _)) = listener.accept().await {
+                let (r, _w) = sock.into_split();
+                let mut r = BufReader::new(r);
+                let mut line = String::new();
+                let _ = r.read_line(&mut line).await; // read AUTH, ignore
+                // Drop _w (and the read half via scope exit) so the
+                // peer sees an immediate EOF on the next read.
+            }
+        });
+        let controller = TorController::new(addr, TorAuth::None);
+        let err = controller.new_identity().await.expect_err("should fail");
+        let msg = format!("{err:#}");
+        assert!(
+            msg.contains("closed connection"),
+            "expected EOF-mid-reply error, got: {msg}"
+        );
+    }
+
+    #[tokio::test]
+    async fn multi_line_250_continuation_is_accepted() {
+        let recorder = Arc::new(Mutex::new(Vec::new()));
+        // AUTHENTICATE reply uses the `250-...\r\n250 OK\r\n` form.
+        // Single reply string contains the whole multi-line response.
+        let addr = spawn_mock(
+            vec!["250-banner=foo\r\n250 OK", "250 OK"],
+            Arc::clone(&recorder),
+        )
+        .await;
+        let controller = TorController::new(addr, TorAuth::None);
+        controller.new_identity().await.expect("new_identity ok");
+    }
+
+    #[test]
+    fn from_parts_returns_none_when_url_unset() {
+        let c = TorController::from_parts(None, None, None).unwrap();
+        assert!(c.is_none());
+    }
+
+    #[test]
+    fn from_parts_prefers_cookie_over_password() {
+        let c = TorController::from_parts(
+            Some("tor:9051"),
+            Some("pw"),
+            Some(Path::new("/var/lib/tor/control_auth_cookie")),
+        )
+        .unwrap()
+        .expect("controller built");
+        assert!(matches!(c.auth, TorAuth::Cookie(_)));
+    }
+
+    #[test]
+    fn from_parts_falls_back_to_password_without_cookie() {
+        let c = TorController::from_parts(Some("tor:9051"), Some("pw"), None)
+            .unwrap()
+            .expect("controller built");
+        assert!(matches!(c.auth, TorAuth::Password(p) if p == "pw"));
+    }
+
+    #[test]
+    fn parse_control_url_accepts_tcp_scheme() {
+        assert_eq!(parse_control_url("tcp://127.0.0.1:9051").unwrap(), "127.0.0.1:9051");
+    }
+
+    #[test]
+    fn parse_control_url_defaults_port_when_omitted() {
+        assert_eq!(parse_control_url("tor").unwrap(), "tor:9051");
+    }
+
+    #[test]
+    fn parse_control_url_passes_through_host_port() {
+        assert_eq!(parse_control_url("tor:9999").unwrap(), "tor:9999");
+    }
+
+    #[test]
+    fn parse_control_url_rejects_empty() {
+        assert!(parse_control_url("").is_err());
+        assert!(parse_control_url("tcp://").is_err());
+    }
+
+    #[test]
+    fn escape_quoted_handles_quotes_and_backslashes() {
+        assert_eq!(escape_quoted(r#"a"b\c"#), r#"a\"b\\c"#);
+    }
+
+    #[test]
+    fn debug_format_redacts_password_and_cookie_path() {
+        // Regression: app.rs / bin/crawler.rs log the controller at
+        // startup via `tracing::info!(?t, ...)`. A derived Debug on
+        // TorAuth would expand TorAuth::Password(p) and leak the
+        // plaintext into logs.
+        let c = TorController::new("tor:9051", TorAuth::Password("super-secret".into()));
+        let dbg = format!("{c:?}");
+        assert!(!dbg.contains("super-secret"), "password leaked: {dbg}");
+        assert!(dbg.contains("<redacted>"), "expected <redacted>, got: {dbg}");
+
+        let c = TorController::new(
+            "tor:9051",
+            TorAuth::Cookie("/var/lib/tor/control_auth_cookie".into()),
+        );
+        let dbg = format!("{c:?}");
+        assert!(!dbg.contains("control_auth_cookie"), "cookie path leaked: {dbg}");
+    }
+
+    #[test]
+    fn hex_encode_zero_pads_low_bytes() {
+        assert_eq!(hex_encode(&[0x00, 0x0f, 0xff]), "000fff");
+    }
+}

backend/src/crawler/url_utils.rs

@@ -91,6 +91,26 @@ pub fn registrable_domain(url: &str) -> Option<String> {
     Some(format!(".{}", registrable.join(".")))
 }
 
+/// Normalise a SOCKS proxy URL for Chromium's `--proxy-server=` flag.
+///
+/// reqwest accepts both `socks5://` (resolve locally) and
+/// `socks5h://` (resolve via the SOCKS server — important when the
+/// proxy is TOR and we don't want the host's resolver to see the
+/// target hostname). Chromium does **not** know the `socks5h` scheme
+/// and refuses navigations with `ERR_NO_SUPPORTED_PROXIES`. It
+/// already sends destination hostnames over SOCKS5 by default
+/// regardless, so stripping the `h` is a pure scheme rename — the
+/// remote-DNS behaviour is preserved.
+///
+/// Non-SOCKS schemes pass through unchanged.
+pub fn chromium_proxy_arg(proxy: &str) -> String {
+    if let Some(rest) = proxy.strip_prefix("socks5h://") {
+        format!("socks5://{rest}")
+    } else {
+        proxy.to_string()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -191,4 +211,34 @@ mod tests {
             Some("[2001:db8::1]")
         );
     }
+
+    #[test]
+    fn chromium_proxy_arg_strips_socks5h_to_socks5() {
+        // Regression: passing socks5h:// to Chromium yields
+        // ERR_NO_SUPPORTED_PROXIES at navigation time.
+        assert_eq!(
+            chromium_proxy_arg("socks5h://127.0.0.1:9050"),
+            "socks5://127.0.0.1:9050"
+        );
+        assert_eq!(
+            chromium_proxy_arg("socks5h://tor:9050"),
+            "socks5://tor:9050"
+        );
+    }
+
+    #[test]
+    fn chromium_proxy_arg_passes_socks5_unchanged() {
+        assert_eq!(
+            chromium_proxy_arg("socks5://127.0.0.1:9050"),
+            "socks5://127.0.0.1:9050"
+        );
+    }
+
+    #[test]
+    fn chromium_proxy_arg_passes_non_socks_unchanged() {
+        assert_eq!(
+            chromium_proxy_arg("http://proxy.example:8080"),
+            "http://proxy.example:8080"
+        );
+    }
 }

backend/src/error.rs

@@ -21,6 +21,11 @@ pub enum AppError {
     PayloadTooLarge(String),
     #[error("unsupported media type: {0}")]
     UnsupportedMediaType(String),
+    /// 503 — a feature is currently unavailable, distinct from a 5xx
+    /// internal error. Used when admin actions require the crawler
+    /// daemon but it's been disabled (`CRAWLER_DAEMON=false`).
+    #[error("service unavailable: {0}")]
+    ServiceUnavailable(String),
     /// 429 with an optional `Retry-After` header value (in seconds).
     #[error("too many requests")]
     TooManyRequests {
@@ -56,6 +61,7 @@ impl AppError {
             AppError::Conflict(_) => "conflict",
             AppError::PayloadTooLarge(_) => "payload_too_large",
             AppError::UnsupportedMediaType(_) => "unsupported_media_type",
+            AppError::ServiceUnavailable(_) => "service_unavailable",
             AppError::TooManyRequests { .. } => "too_many_requests",
             AppError::ValidationFailed { .. } => "validation_failed",
             AppError::Database(sqlx::Error::RowNotFound) => "not_found",
@@ -85,6 +91,9 @@ impl IntoResponse for AppError {
             AppError::UnsupportedMediaType(msg) => {
                 (StatusCode::UNSUPPORTED_MEDIA_TYPE, msg.clone(), None)
             }
+            AppError::ServiceUnavailable(msg) => {
+                (StatusCode::SERVICE_UNAVAILABLE, msg.clone(), None)
+            }
             AppError::TooManyRequests { retry_after_secs } => {
                 // Emit `Retry-After: N` (RFC 6585 §4) so a well-behaved
                 // client can back off correctly. Done by building the

backend/src/repo/crawler.rs

@@ -542,6 +542,51 @@ pub async fn mark_run_completed(pool: &PgPool, source_id: &str) -> sqlx::Result<
     Ok(())
 }
 
+/// List mangas whose `cover_image_path IS NULL` but a live
+/// `manga_sources` row still attaches them to a source. The bounded
+/// result feeds the cover-backfill pass in [`crate::crawler::pipeline`]:
+/// each entry is one (manga, freshest source row) pair where a cover
+/// re-download is in order.
+///
+/// Per-manga deduplication uses `DISTINCT ON (m.id)` keyed on the row
+/// with the newest `last_seen_at`, so a manga that's surfaced by
+/// multiple sources only produces one row (the freshest). Sort is
+/// stable for tests.
+pub async fn list_missing_covers(
+    pool: &PgPool,
+    max: i64,
+) -> sqlx::Result<Vec<MissingCoverEntry>> {
+    let rows: Vec<(Uuid, String, String)> = sqlx::query_as(
+        r#"
+        SELECT DISTINCT ON (m.id) m.id, ms.source_manga_key, ms.source_url
+          FROM mangas m
+          JOIN manga_sources ms ON ms.manga_id = m.id
+         WHERE m.cover_image_path IS NULL
+           AND ms.dropped_at IS NULL
+         ORDER BY m.id, ms.last_seen_at DESC
+         LIMIT $1
+        "#,
+    )
+    .bind(max)
+    .fetch_all(pool)
+    .await?;
+    Ok(rows
+        .into_iter()
+        .map(|(manga_id, source_manga_key, source_url)| MissingCoverEntry {
+            manga_id,
+            source_manga_key,
+            source_url,
+        })
+        .collect())
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct MissingCoverEntry {
+    pub manga_id: Uuid,
+    pub source_manga_key: String,
+    pub source_url: String,
+}
+
 /// Read the recovery flag for `source_id`. A missing row OR an
 /// unparseable value reads as `true` ("clean") — the former covers the
 /// first-ever run on a virgin DB (no recovery needed), the latter

backend/tests/api_admin_resync.rs

@@ -0,0 +1,350 @@
+//! Integration tests for the admin force-resync endpoints.
+//!
+//! Real resync work requires Chromium, so these tests swap in a stub
+//! [`ResyncService`] to assert the handler-level contract: routing,
+//! admin gate, 503 when the daemon is disabled, 404 / 422 mapping for
+//! missing-resource / no-source cases, and the audit-log side effect.
+
+mod common;
+
+use std::sync::Arc;
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+use async_trait::async_trait;
+use axum::http::StatusCode;
+use serde_json::json;
+use sqlx::PgPool;
+use tower::ServiceExt;
+use uuid::Uuid;
+
+use mangalord::crawler::resync::{
+    ChapterResyncOutcome, MangaResyncOutcome, ResyncError, ResyncService,
+};
+use mangalord::repo;
+use mangalord::repo::crawler::UpsertStatus;
+
+/// Stub that records call counts and returns a canned outcome.
+struct StubResync {
+    manga_calls: AtomicUsize,
+    chapter_calls: AtomicUsize,
+    /// When true, returns NoMangaSource / NoChapterSource.
+    no_source: bool,
+}
+
+impl StubResync {
+    fn new() -> Arc<Self> {
+        Arc::new(Self {
+            manga_calls: AtomicUsize::new(0),
+            chapter_calls: AtomicUsize::new(0),
+            no_source: false,
+        })
+    }
+    fn no_source() -> Arc<Self> {
+        Arc::new(Self {
+            manga_calls: AtomicUsize::new(0),
+            chapter_calls: AtomicUsize::new(0),
+            no_source: true,
+        })
+    }
+}
+
+#[async_trait]
+impl ResyncService for StubResync {
+    async fn resync_manga(&self, manga_id: Uuid) -> anyhow::Result<MangaResyncOutcome> {
+        self.manga_calls.fetch_add(1, Ordering::SeqCst);
+        if self.no_source {
+            return Err(ResyncError::NoMangaSource.into());
+        }
+        Ok(MangaResyncOutcome {
+            manga_id,
+            metadata_status: UpsertStatus::Updated,
+            cover_fetched: true,
+        })
+    }
+    async fn resync_chapter(&self, chapter_id: Uuid) -> anyhow::Result<ChapterResyncOutcome> {
+        self.chapter_calls.fetch_add(1, Ordering::SeqCst);
+        if self.no_source {
+            return Err(ResyncError::NoChapterSource.into());
+        }
+        Ok(ChapterResyncOutcome::Fetched {
+            chapter_id,
+            pages: 7,
+        })
+    }
+}
+
+async fn promote_admin(pool: &PgPool, username: &str) {
+    let u = repo::user::find_by_username(pool, username)
+        .await
+        .unwrap()
+        .unwrap();
+    repo::user::set_is_admin_unchecked(pool, u.id, true)
+        .await
+        .unwrap();
+}
+
+async fn insert_manga(pool: &PgPool, title: &str) -> Uuid {
+    let (id,): (Uuid,) = sqlx::query_as(
+        "INSERT INTO mangas (title, status, alt_titles) VALUES ($1, 'ongoing', ARRAY[]::text[]) RETURNING id",
+    )
+    .bind(title)
+    .fetch_one(pool)
+    .await
+    .unwrap();
+    id
+}
+
+async fn insert_chapter(pool: &PgPool, manga_id: Uuid, number: i32, pages: i32) -> Uuid {
+    let (id,): (Uuid,) = sqlx::query_as(
+        "INSERT INTO chapters (manga_id, number, title, page_count) VALUES ($1, $2, NULL, $3) RETURNING id",
+    )
+    .bind(manga_id)
+    .bind(number)
+    .bind(pages)
+    .fetch_one(pool)
+    .await
+    .unwrap();
+    id
+}
+
+// ----- manga resync ---------------------------------------------------------
+
+#[sqlx::test(migrations = "./migrations")]
+async fn manga_resync_calls_service_and_returns_refreshed_detail(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "Hello").await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/mangas/{manga_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+    let body = common::body_json(resp).await;
+    // Stub returned Updated + cover_fetched=true.
+    assert_eq!(body["metadata_status"], "updated");
+    assert_eq!(body["cover_fetched"], true);
+    // Response includes the refreshed manga detail.
+    assert_eq!(body["manga"]["id"], manga_id.to_string());
+    assert_eq!(body["manga"]["title"], "Hello");
+
+    assert_eq!(stub.manga_calls.load(Ordering::SeqCst), 1);
+
+    // Audit row written.
+    let (audit_count,): (i64,) =
+        sqlx::query_as("SELECT count(*) FROM admin_audit WHERE action = 'manga_resync' AND target_id = $1")
+            .bind(manga_id)
+            .fetch_one(&pool)
+            .await
+            .unwrap();
+    assert_eq!(audit_count, 1);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn manga_resync_returns_404_for_unknown_id(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/mangas/{}/resync", Uuid::new_v4()),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::NOT_FOUND);
+    // Service must not have been called when the manga doesn't exist.
+    assert_eq!(stub.manga_calls.load(Ordering::SeqCst), 0);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn manga_resync_maps_no_source_to_422(pool: PgPool) {
+    let stub = StubResync::no_source();
+    let h = common::harness_with_resync(pool.clone(), stub);
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "Manual upload, no crawler source").await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/mangas/{manga_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::UNPROCESSABLE_ENTITY);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["error"]["details"]["manga"], "no_source");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn manga_resync_returns_503_when_daemon_disabled(pool: PgPool) {
+    let h = common::harness(pool.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "Z").await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/mangas/{manga_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::SERVICE_UNAVAILABLE);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["error"]["code"], "service_unavailable");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn manga_resync_requires_admin(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub);
+    // Non-admin user.
+    let (_u, cookie) = common::register_user(&h.app).await;
+    let manga_id = insert_manga(&pool, "M").await;
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/mangas/{manga_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::FORBIDDEN);
+}
+
+// ----- chapter resync -------------------------------------------------------
+
+#[sqlx::test(migrations = "./migrations")]
+async fn chapter_resync_calls_service_and_returns_refreshed_chapter(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "M").await;
+    let chapter_id = insert_chapter(&pool, manga_id, 1, 0).await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/chapters/{chapter_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["outcome"], "fetched");
+    assert_eq!(body["pages"], 7);
+    assert_eq!(body["chapter"]["id"], chapter_id.to_string());
+    assert_eq!(stub.chapter_calls.load(Ordering::SeqCst), 1);
+
+    let (audit_count,): (i64,) = sqlx::query_as(
+        "SELECT count(*) FROM admin_audit WHERE action = 'chapter_resync' AND target_id = $1",
+    )
+    .bind(chapter_id)
+    .fetch_one(&pool)
+    .await
+    .unwrap();
+    assert_eq!(audit_count, 1);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn chapter_resync_returns_404_for_unknown_id(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/chapters/{}/resync", Uuid::new_v4()),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::NOT_FOUND);
+    assert_eq!(stub.chapter_calls.load(Ordering::SeqCst), 0);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn chapter_resync_maps_no_source_to_422(pool: PgPool) {
+    let stub = StubResync::no_source();
+    let h = common::harness_with_resync(pool.clone(), stub);
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "M").await;
+    let chapter_id = insert_chapter(&pool, manga_id, 1, 0).await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/chapters/{chapter_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::UNPROCESSABLE_ENTITY);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["error"]["details"]["chapter"], "no_source");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn chapter_resync_returns_503_when_daemon_disabled(pool: PgPool) {
+    let h = common::harness(pool.clone());
+    let (username, cookie) = common::register_user(&h.app).await;
+    promote_admin(&pool, &username).await;
+    let manga_id = insert_manga(&pool, "M").await;
+    let chapter_id = insert_chapter(&pool, manga_id, 1, 0).await;
+
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/chapters/{chapter_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::SERVICE_UNAVAILABLE);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn chapter_resync_requires_admin(pool: PgPool) {
+    let stub = StubResync::new();
+    let h = common::harness_with_resync(pool.clone(), stub);
+    let (_u, cookie) = common::register_user(&h.app).await;
+    let manga_id = insert_manga(&pool, "M").await;
+    let chapter_id = insert_chapter(&pool, manga_id, 1, 0).await;
+    let resp = h
+        .app
+        .oneshot(common::post_json_with_cookie(
+            &format!("/api/v1/admin/chapters/{chapter_id}/resync"),
+            json!({}),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::FORBIDDEN);
+}

backend/tests/api_admin_role.rs

@@ -49,6 +49,7 @@ fn admin_test_router(pool: PgPool) -> (Router, TempDir) {
         auth,
         upload: UploadConfig::default(),
         auth_limiter,
+        resync: None,
     };
     let app = Router::new()
         .nest("/api/v1", api::routes())

backend/tests/api_private_mode.rs

@@ -0,0 +1,189 @@
+//! Site-wide auth gate (`PRIVATE_MODE=true`).
+//!
+//! With private mode on, every API path except a small allowlist
+//! (`/health`, `/auth/config`, `/auth/login`, `/auth/logout`) requires
+//! a valid session cookie or bearer token, and `/auth/register` is
+//! force-blocked regardless of `ALLOW_SELF_REGISTER`. With private mode
+//! off (the default), nothing changes — the `public_mode_*` test
+//! pins that regression guard.
+
+mod common;
+
+use serde_json::json;
+use sqlx::PgPool;
+use tower::ServiceExt;
+
+use axum::http::StatusCode;
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_blocks_anonymous_manga_list(pool: PgPool) {
+    let h = common::harness_with_private_mode(pool);
+    let resp = h.app.oneshot(common::get("/api/v1/mangas")).await.unwrap();
+    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_blocks_anonymous_files(pool: PgPool) {
+    let h = common::harness_with_private_mode(pool);
+    // The path doesn't have to exist — the guard runs before routing,
+    // so the response is 401 (not 404). That's the property the test
+    // is pinning: nothing leaks via crafted URLs.
+    let resp = h
+        .app
+        .oneshot(common::get("/api/v1/files/anything.png"))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_allows_session_cookie_read(pool: PgPool) {
+    // Register through a non-private harness sharing the same DB pool
+    // so the session row exists. Then exercise the gate using a fresh
+    // private-mode harness against the same DB.
+    let public = common::harness(pool.clone());
+    let (_, cookie) = common::register_user(&public.app).await;
+
+    let private = common::harness_with_private_mode(pool);
+    let resp = private
+        .app
+        .oneshot(common::get_with_cookie("/api/v1/mangas", &cookie))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_allows_bearer_token_read(pool: PgPool) {
+    let public = common::harness(pool.clone());
+    let (_, cookie) = common::register_user(&public.app).await;
+
+    let resp = public
+        .app
+        .clone()
+        .oneshot(common::post_json_with_cookie(
+            "/api/v1/auth/tokens",
+            json!({ "name": "private-mode-bot" }),
+            &cookie,
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::CREATED);
+    let body = common::body_json(resp).await;
+    let bearer = body["bearer"].as_str().unwrap().to_string();
+
+    let private = common::harness_with_private_mode(pool);
+    let resp = private
+        .app
+        .oneshot(common::get_with_bearer("/api/v1/mangas", &bearer))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_allows_login_endpoint_anonymous(pool: PgPool) {
+    // Seed a user via the public harness so login has credentials to
+    // verify against.
+    let public = common::harness(pool.clone());
+    let _ = public
+        .app
+        .clone()
+        .oneshot(common::post_json(
+            "/api/v1/auth/register",
+            json!({ "username": "alice", "password": "hunter2hunter2" }),
+        ))
+        .await
+        .unwrap();
+
+    let private = common::harness_with_private_mode(pool);
+    let resp = private
+        .app
+        .oneshot(common::post_json(
+            "/api/v1/auth/login",
+            json!({ "username": "alice", "password": "hunter2hunter2" }),
+        ))
+        .await
+        .unwrap();
+    // Reaches the login handler and succeeds — *not* 401 from the
+    // gate. That's the property we're pinning.
+    assert_eq!(resp.status(), StatusCode::OK);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_allows_health_and_config_anonymous(pool: PgPool) {
+    let h = common::harness_with_private_mode(pool);
+
+    let r = h
+        .app
+        .clone()
+        .oneshot(common::get("/api/v1/health"))
+        .await
+        .unwrap();
+    assert_eq!(r.status(), StatusCode::OK);
+
+    let r = h
+        .app
+        .oneshot(common::get("/api/v1/auth/config"))
+        .await
+        .unwrap();
+    assert_eq!(r.status(), StatusCode::OK);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn private_mode_blocks_register_even_when_self_register_enabled(pool: PgPool) {
+    // harness_with_private_mode keeps `allow_self_register=true` (the
+    // default) — private mode is supposed to force-block register
+    // regardless. That's what this test pins.
+    let h = common::harness_with_private_mode(pool);
+    let resp = h
+        .app
+        .oneshot(common::post_json(
+            "/api/v1/auth/register",
+            json!({ "username": "alice", "password": "hunter2hunter2" }),
+        ))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::FORBIDDEN);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["error"]["code"], "forbidden");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn auth_config_reports_private_mode_and_effective_self_register(pool: PgPool) {
+    let h = common::harness_with_private_mode(pool);
+    let resp = h
+        .app
+        .oneshot(common::get("/api/v1/auth/config"))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["private_mode"], true);
+    // Effective value: `allow_self_register && !private_mode` is false
+    // here even though the raw `allow_self_register` is true.
+    assert_eq!(body["self_register_enabled"], false);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn public_mode_does_not_gate_anonymous_reads(pool: PgPool) {
+    // Regression guard: with private_mode off (the default), the gate
+    // must be a no-op so existing public deployments stay public.
+    let h = common::harness(pool);
+    let resp = h.app.oneshot(common::get("/api/v1/mangas")).await.unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn public_mode_reports_private_mode_false(pool: PgPool) {
+    let h = common::harness(pool);
+    let resp = h
+        .app
+        .oneshot(common::get("/api/v1/auth/config"))
+        .await
+        .unwrap();
+    assert_eq!(resp.status(), StatusCode::OK);
+    let body = common::body_json(resp).await;
+    assert_eq!(body["private_mode"], false);
+    assert_eq!(body["self_register_enabled"], true);
+}

backend/tests/common/mod.rs

@@ -74,6 +74,10 @@ fn harness_with_auth_config(
             max_file_bytes: 256 * 1024,
         },
         auth_limiter,
+        // Default harness has no crawler daemon wired up; admin resync
+        // handlers return 503 in this config. Tests that need a stub
+        // resync service swap it in via `harness_with_resync`.
+        resync: None,
     };
     Harness { app: router(state), _storage_dir: storage_dir }
 }
@@ -92,6 +96,21 @@ pub fn harness_with_self_register_disabled(pool: PgPool) -> Harness {
     harness_with_auth_config(pool, storage, storage_dir, auth)
 }
 
+/// Like [`harness`] but flips `PRIVATE_MODE` on so the site-wide auth
+/// gate is exercised. `allow_self_register` stays at its default `true`
+/// to verify that private mode force-disables self-registration on top
+/// of whatever `ALLOW_SELF_REGISTER` says.
+pub fn harness_with_private_mode(pool: PgPool) -> Harness {
+    let storage_dir = tempfile::tempdir().expect("tempdir");
+    let storage = Arc::new(LocalStorage::new(storage_dir.path()));
+    let auth = AuthConfig {
+        cookie_secure: false,
+        private_mode: true,
+        ..AuthConfig::default()
+    };
+    harness_with_auth_config(pool, storage, storage_dir, auth)
+}
+
 /// Like [`harness`] but configures a tight auth rate limit. Used by
 /// the brute-force-rate-limiting test.
 pub fn harness_with_auth_rate_limit(
@@ -109,6 +128,37 @@ pub fn harness_with_auth_rate_limit(
     harness_with_auth_config(pool, storage, storage_dir, auth)
 }
 
+/// Like [`harness`] but slots a caller-supplied [`ResyncService`] stub
+/// into `AppState.resync`. Used by the admin resync tests so the
+/// endpoint path is exercised without standing up a real Chromium.
+pub fn harness_with_resync(
+    pool: PgPool,
+    resync: Arc<dyn mangalord::crawler::resync::ResyncService>,
+) -> Harness {
+    let storage_dir = tempfile::tempdir().expect("tempdir");
+    let storage = Arc::new(LocalStorage::new(storage_dir.path()));
+    let auth = AuthConfig {
+        cookie_secure: false,
+        ..AuthConfig::default()
+    };
+    let auth_limiter = Arc::new(AuthRateLimiter::new(auth.rate_limit));
+    let state = AppState {
+        db: pool,
+        storage,
+        auth,
+        upload: UploadConfig {
+            max_request_bytes: 4 * 1024 * 1024,
+            max_file_bytes: 256 * 1024,
+        },
+        auth_limiter,
+        resync: Some(resync),
+    };
+    Harness {
+        app: router(state),
+        _storage_dir: storage_dir,
+    }
+}
+
 /// Wraps a real `Storage` and fails on the N-th `put` call so tests can
 /// assert that handlers roll their DB writes back when storage errors
 /// mid-upload. Reads and other operations delegate to `inner`.

backend/tests/crawler_sync.rs

@@ -829,6 +829,107 @@ async fn sync_tags_garbage_collects_orphan_user_attachments(pool: PgPool) {
     assert_eq!(orphan_rows, 0, "orphan user-attached tag should be reaped");
 }
 
+// ---- list_missing_covers ---------------------------------------------------
+
+#[sqlx::test(migrations = "./migrations")]
+async fn list_missing_covers_only_returns_rows_without_cover(pool: PgPool) {
+    crawler::ensure_source(&pool, "target", "T", "https://x.example")
+        .await
+        .unwrap();
+    let with_cover = sample_manga("with", "With Cover", "h1");
+    let without_cover = sample_manga("without", "No Cover", "h2");
+    let _w = crawler::upsert_manga_from_source(&pool, "target", "https://x.example/with", &with_cover)
+        .await
+        .unwrap();
+    let nc = crawler::upsert_manga_from_source(&pool, "target", "https://x.example/without", &without_cover)
+        .await
+        .unwrap();
+
+    // Manually set a cover for `with` only.
+    sqlx::query("UPDATE mangas SET cover_image_path = 'mangas/x/cover.jpg' WHERE id = $1")
+        .bind(_w.manga_id)
+        .execute(&pool)
+        .await
+        .unwrap();
+
+    let entries = crawler::list_missing_covers(&pool, 50).await.unwrap();
+    assert_eq!(entries.len(), 1, "exactly the manga without a cover");
+    assert_eq!(entries[0].manga_id, nc.manga_id);
+    assert_eq!(entries[0].source_manga_key, "without");
+    assert_eq!(entries[0].source_url, "https://x.example/without");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn list_missing_covers_skips_dropped_source_rows(pool: PgPool) {
+    crawler::ensure_source(&pool, "target", "T", "https://x.example")
+        .await
+        .unwrap();
+    let m = sample_manga("foo", "Foo", "h1");
+    let up = crawler::upsert_manga_from_source(&pool, "target", "https://x.example/foo", &m)
+        .await
+        .unwrap();
+    sqlx::query("UPDATE manga_sources SET dropped_at = NOW() WHERE manga_id = $1")
+        .bind(up.manga_id)
+        .execute(&pool)
+        .await
+        .unwrap();
+
+    let entries = crawler::list_missing_covers(&pool, 50).await.unwrap();
+    assert!(
+        entries.is_empty(),
+        "dropped-source mangas must not be backfilled — no live source to fetch from"
+    );
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn list_missing_covers_respects_limit(pool: PgPool) {
+    crawler::ensure_source(&pool, "target", "T", "https://x.example")
+        .await
+        .unwrap();
+    for i in 0..5 {
+        let key = format!("m{i}");
+        let url = format!("https://x.example/{key}");
+        let m = sample_manga(&key, &format!("M{i}"), &format!("h{i}"));
+        let _ = crawler::upsert_manga_from_source(&pool, "target", &url, &m)
+            .await
+            .unwrap();
+    }
+    let entries = crawler::list_missing_covers(&pool, 3).await.unwrap();
+    assert_eq!(entries.len(), 3, "limit caps the result set");
+}
+
+#[sqlx::test(migrations = "./migrations")]
+async fn list_missing_covers_deduplicates_per_manga(pool: PgPool) {
+    // A manga surfaced by two sources should produce ONE backfill
+    // entry, not two — otherwise the per-tick cap could be eaten by
+    // duplicates and starve other mangas.
+    crawler::ensure_source(&pool, "src-a", "A", "https://a.example")
+        .await
+        .unwrap();
+    crawler::ensure_source(&pool, "src-b", "B", "https://b.example")
+        .await
+        .unwrap();
+    let m = sample_manga("foo", "Foo", "h1");
+    let up = crawler::upsert_manga_from_source(&pool, "src-a", "https://a.example/foo", &m)
+        .await
+        .unwrap();
+    // Second source attaches to the SAME manga row.
+    sqlx::query(
+        "INSERT INTO manga_sources (source_id, source_manga_key, manga_id, source_url) \
+         VALUES ($1, $2, $3, $4)",
+    )
+    .bind("src-b")
+    .bind("foo-on-b")
+    .bind(up.manga_id)
+    .bind("https://b.example/foo")
+    .execute(&pool)
+    .await
+    .unwrap();
+
+    let entries = crawler::list_missing_covers(&pool, 50).await.unwrap();
+    assert_eq!(entries.len(), 1, "DISTINCT ON (m.id) collapses duplicate source rows");
+}
+
 #[sqlx::test(migrations = "./migrations")]
 async fn re_appearing_manga_clears_dropped_at(pool: PgPool) {
     crawler::ensure_source(&pool, "target", "T", "https://x.example")

docker-compose.dev.yml

@@ -17,5 +17,28 @@ services:
       timeout: 5s
       retries: 10
 
+  # Optional: TOR daemon for crawler dev. Ports bind to 127.0.0.1 only
+  # — never the LAN — so a native `cargo run` on the host can reach
+  # 127.0.0.1:9050 / 9051. Mirrors the prod tor service (see
+  # docker-compose.yml), just with host-loopback ports and a default
+  # password baked in for friction-free dev.
+  tor:
+    image: dockurr/tor:latest
+    entrypoint: ["/bin/sh", "/usr/local/bin/mangalord-entrypoint.sh"]
+    environment:
+      PASSWORD: ${TOR_CONTROL_PASSWORD:-dev-tor-password}
+    volumes:
+      - ./tor/torrc:/etc/tor/torrc:ro
+      - ./tor/entrypoint.sh:/usr/local/bin/mangalord-entrypoint.sh:ro
+    ports:
+      - "127.0.0.1:9050:9050"
+      - "127.0.0.1:9051:9051"
+    healthcheck:
+      test: ["CMD-SHELL", "nc -z 127.0.0.1 9050 && nc -z 127.0.0.1 9051"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+      start_period: 30s
+
 volumes:
   mangalord-postgres-dev:

docker-compose.yml

@@ -19,11 +19,48 @@ services:
       timeout: 5s
       retries: 10
 
+  tor:
+    # SOCKS5 proxy for the crawler, plus a control port so the backend
+    # can signal NEWNYM on bad pages. See tor/torrc for the daemon
+    # config; both ports are only `expose`d (compose-internal), never
+    # bound on the host.
+    #
+    # We bypass dockurr/tor's stock entrypoint because it binds the
+    # control port to localhost (unreachable from the backend
+    # container) and skips its own HashedControlPassword injection
+    # when the user's torrc declares a ControlPort. Our wrapper
+    # (tor/entrypoint.sh) generates the hash from $PASSWORD and execs
+    # tor with our torrc. Backend authenticates with the same plain
+    # string via CRAWLER_TOR_CONTROL_PASSWORD.
+    image: dockurr/tor:latest
+    entrypoint: ["/bin/sh", "/usr/local/bin/mangalord-entrypoint.sh"]
+    environment:
+      PASSWORD: ${TOR_CONTROL_PASSWORD:?TOR_CONTROL_PASSWORD must be set in .env}
+    volumes:
+      - ./tor/torrc:/etc/tor/torrc:ro
+      - ./tor/entrypoint.sh:/usr/local/bin/mangalord-entrypoint.sh:ro
+    expose:
+      - "9050"
+      - "9051"
+    # Wait for both control + SOCKS ports to listen before downstream
+    # services start. dockurr/tor's main process spawns before tor
+    # itself is bound, so `service_started` alone races the first
+    # NEWNYM call.
+    healthcheck:
+      test: ["CMD-SHELL", "nc -z 127.0.0.1 9050 && nc -z 127.0.0.1 9051"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+      start_period: 30s
+    restart: unless-stopped
+
   backend:
     build: ./backend
     depends_on:
       postgres:
         condition: service_healthy
+      tor:
+        condition: service_healthy
     environment:
       DATABASE_URL: postgres://${POSTGRES_USER:-mangalord}:${POSTGRES_PASSWORD:?POSTGRES_PASSWORD must be set in .env}@postgres:5432/${POSTGRES_DB:-mangalord}
       BIND_ADDRESS: 0.0.0.0:8080
@@ -44,6 +81,16 @@ services:
       # arm64 deployments. Pair with `--build-arg INSTALL_CHROMIUM=true`
       # so the image actually contains the binary.
       CRAWLER_CHROMIUM_BINARY: ${CRAWLER_CHROMIUM_BINARY:-}
+      # TOR proxy + NEWNYM recircuit (see .env.example for details).
+      # Defaults assume the bundled `tor` service above; override
+      # CRAWLER_PROXY=  and CRAWLER_TOR_CONTROL_URL=  (both empty) in
+      # .env to disable. CRAWLER_TOR_CONTROL_PASSWORD MUST match the
+      # tor service's PASSWORD (both wired to the same TOR_CONTROL_PASSWORD
+      # .env var below).
+      CRAWLER_PROXY: ${CRAWLER_PROXY-socks5h://tor:9050}
+      CRAWLER_TOR_CONTROL_URL: ${CRAWLER_TOR_CONTROL_URL-tcp://tor:9051}
+      CRAWLER_TOR_CONTROL_PASSWORD: ${TOR_CONTROL_PASSWORD:?TOR_CONTROL_PASSWORD must be set in .env}
+      CRAWLER_TOR_RECIRCUIT_MAX_ATTEMPTS: ${CRAWLER_TOR_RECIRCUIT_MAX_ATTEMPTS:-3}
     volumes:
       - storage-data:/var/lib/mangalord/storage
     # No host port mapping in the default setup — the frontend proxies

frontend/e2e/manga-list.spec.ts

@@ -10,6 +10,15 @@ import { test, expect, type Page } from '@playwright/test';
 const emptyPage = { items: [], page: { limit: 50, offset: 0, total: null } };
 
 async function mockAnonymous(page: Page) {
+    // Force public mode so the root +layout.ts doesn't bounce us to /login
+    // (a dev backend with PRIVATE_MODE=true must not leak into E2E runs).
+    await page.route('**/api/v1/auth/config', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({ self_register_enabled: true, private_mode: false })
+        });
+    });
     await page.route('**/api/v1/auth/me', async (route) => {
         await route.fulfill({
             status: 401,
@@ -69,3 +78,53 @@ test('search updates the manga list', async ({ page }) => {
     await expect(page.getByTestId('manga-list')).toContainText('Berserk');
     expect(lastSearch).toBe('berserk');
 });
+
+test('clicking Next paginates to page 2 and updates the URL', async ({ page }) => {
+    await mockAnonymous(page);
+
+    // Fake a catalogue of 75 mangas; page 1 is ids 1..50, page 2 is ids 51..75.
+    const TOTAL = 75;
+    function mangaAt(i: number) {
+        return {
+            id: `m${i}`,
+            title: `Manga ${i}`,
+            author: 'Test',
+            description: null,
+            cover_image_path: null,
+            created_at: '2026-01-01T00:00:00Z',
+            updated_at: '2026-01-01T00:00:00Z',
+            authors: [],
+            genres: []
+        };
+    }
+
+    await page.route('**/api/v1/mangas*', async (route) => {
+        const url = new URL(route.request().url());
+        const limit = Number(url.searchParams.get('limit') ?? '50');
+        const offset = Number(url.searchParams.get('offset') ?? '0');
+        const items: ReturnType<typeof mangaAt>[] = [];
+        for (let i = offset + 1; i <= Math.min(offset + limit, TOTAL); i++) {
+            items.push(mangaAt(i));
+        }
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({
+                items,
+                page: { limit, offset, total: TOTAL }
+            })
+        });
+    });
+
+    await page.goto('/');
+    await expect(page.getByTestId('manga-total')).toContainText('Showing 1–50 of 75');
+    await expect(page.getByTestId('manga-list')).toContainText('Manga 1');
+    await expect(page.getByTestId('manga-list')).not.toContainText('Manga 75');
+
+    await page.getByTestId('manga-pager').getByRole('button', { name: /next/i }).click();
+
+    await expect(page).toHaveURL(/[?&]page=2(&|$)/);
+    await expect(page.getByTestId('manga-total')).toContainText('Showing 51–75 of 75');
+    await expect(page.getByTestId('manga-list')).toContainText('Manga 75');
+    await expect(page.getByTestId('manga-list')).not.toContainText('Manga 1');
+});

frontend/e2e/page-title.spec.ts

@@ -0,0 +1,67 @@
+import { test, expect, type Page } from '@playwright/test';
+
+// Guards the title-on-nav behavior: without this, a stale title from
+// the last manga / author page lingers when the user navigates to a
+// generic page like /upload.
+
+async function mockAnonymous(page: Page) {
+    await page.route('**/api/v1/auth/config', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({ self_register_enabled: true, private_mode: false })
+        });
+    });
+    await page.route('**/api/v1/auth/me', async (route) => {
+        await route.fulfill({
+            status: 401,
+            contentType: 'application/json',
+            body: JSON.stringify({ error: { code: 'unauthenticated', message: 'unauthenticated' } })
+        });
+    });
+    await page.route('**/api/v1/mangas*', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({ items: [], page: { limit: 50, offset: 0, total: 0 } })
+        });
+    });
+}
+
+test('static route titles use the brand-first layout map', async ({ page }) => {
+    await mockAnonymous(page);
+
+    await page.goto('/');
+    await expect(page).toHaveTitle('Mangalord');
+
+    await page.goto('/upload');
+    await expect(page).toHaveTitle('Mangalord | Upload');
+
+    await page.goto('/login');
+    await expect(page).toHaveTitle('Mangalord | Login');
+
+    await page.goto('/bookmarks');
+    await expect(page).toHaveTitle('Mangalord | Bookmarks');
+
+    await page.goto('/collections');
+    await expect(page).toHaveTitle('Mangalord | Collections');
+});
+
+test('title updates when navigating away from a content page', async ({ page }) => {
+    await mockAnonymous(page);
+
+    // Pretend we just left a manga detail page — the document title
+    // would have been overridden to "Mangalord | Berserk". Use evaluate
+    // to set it synthetically so we can assert the regression cleanly
+    // even though the dynamic page itself isn't mocked here.
+    await page.goto('/');
+    await page.evaluate(() => {
+        document.title = 'Mangalord | Berserk';
+    });
+    expect(await page.title()).toBe('Mangalord | Berserk');
+
+    // Client-side nav to /upload — the root layout must reassert its
+    // mapped title or the stale "Berserk" lingers.
+    await page.goto('/upload');
+    await expect(page).toHaveTitle('Mangalord | Upload');
+});

frontend/e2e/private-mode.spec.ts

@@ -0,0 +1,101 @@
+import { test, expect, type Page } from '@playwright/test';
+
+// Network-level mocks for the private-mode UX. The backend integration
+// tests (api_private_mode.rs) cover the actual gate; here we only
+// verify that the SvelteKit universal load redirects anonymous
+// visitors to /login and then back to where they were going.
+
+const userFixture = {
+    id: 'user-1',
+    username: 'alice',
+    created_at: '2026-01-01T00:00:00Z',
+    is_admin: false
+};
+const emptyPage = { items: [], page: { limit: 50, offset: 0, total: null } };
+
+async function stubPrivateInstance(page: Page) {
+    let loggedIn = false;
+
+    // The flag that flips the gate on. Frontend reads it in
+    // `+layout.ts` to decide whether to redirect.
+    await page.route('**/api/v1/auth/config', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({
+                self_register_enabled: false,
+                private_mode: true
+            })
+        });
+    });
+
+    await page.route('**/api/v1/auth/me', async (route) => {
+        if (loggedIn) {
+            await route.fulfill({
+                status: 200,
+                contentType: 'application/json',
+                body: JSON.stringify({ user: userFixture })
+            });
+        } else {
+            await route.fulfill({
+                status: 401,
+                contentType: 'application/json',
+                body: JSON.stringify({
+                    error: { code: 'unauthenticated', message: 'unauthenticated' }
+                })
+            });
+        }
+    });
+
+    await page.route('**/api/v1/auth/login', async (route) => {
+        loggedIn = true;
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({ user: userFixture })
+        });
+    });
+
+    // The real backend would 401 these too in private mode; we stub
+    // success so the post-login navigation can render the home page
+    // without an additional redirect cycle.
+    await page.route('**/api/v1/mangas*', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify(emptyPage)
+        });
+    });
+}
+
+test('private mode: anonymous visit to / redirects to /login?next=%2F', async ({ page }) => {
+    await stubPrivateInstance(page);
+    await page.goto('/');
+    await expect(page).toHaveURL(/\/login\?next=%2F$/);
+    await expect(page.getByTestId('login-username')).toBeVisible();
+});
+
+test('private mode: register link is hidden', async ({ page }) => {
+    await stubPrivateInstance(page);
+    await page.goto('/login');
+    await expect(page.getByTestId('nav-login')).toBeVisible();
+    // self_register_enabled is the effective value (false in private
+    // mode regardless of ALLOW_SELF_REGISTER), so the navbar must
+    // never render the register affordance here.
+    await expect(page.getByTestId('nav-register')).toHaveCount(0);
+});
+
+test('private mode: after login the user lands back on the requested page', async ({ page }) => {
+    await stubPrivateInstance(page);
+
+    // Visit a deep link → bounced to /login with next= preserving it.
+    await page.goto('/');
+    await expect(page).toHaveURL(/\/login\?next=%2F$/);
+
+    await page.getByTestId('login-username').fill('alice');
+    await page.getByTestId('login-password').fill('hunter2hunter2');
+    await page.getByTestId('login-submit').click();
+
+    // Authenticated → can now reach the home page without bouncing.
+    await expect(page.getByTestId('session-user')).toContainText('alice');
+});

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mangalord-frontend",
-  "version": "0.45.1",
+  "version": "0.50.0",
   "private": true,
   "type": "module",
   "scripts": {

frontend/src/lib/api/admin.test.ts

@@ -14,7 +14,9 @@ import {
     createAdminUser,
     listAdminMangas,
     listAdminChapters,
-    getSystemStats
+    getSystemStats,
+    resyncManga,
+    resyncChapter
 } from './admin';
 
 function ok(body: unknown, status = 200): Response {
@@ -242,4 +244,88 @@ describe('admin api client', () => {
         const s = await getSystemStats();
         expect(s.disk).toBeNull();
     });
+
+    // ---- force resync ----
+
+    it('resyncManga POSTs to /v1/admin/mangas/{id}/resync and returns the envelope', async () => {
+        const resp = {
+            manga: {
+                id: 'm-1',
+                title: 'T',
+                status: 'ongoing',
+                alt_titles: [],
+                description: null,
+                cover_image_path: 'mangas/m-1/cover.jpg',
+                created_at: '2026-01-01T00:00:00Z',
+                updated_at: '2026-01-02T00:00:00Z',
+                authors: [],
+                genres: [],
+                tags: []
+            },
+            metadata_status: 'updated',
+            cover_fetched: true
+        };
+        fetchSpy.mockResolvedValueOnce(ok(resp));
+        const got = await resyncManga('m-1');
+        expect(got.metadata_status).toBe('updated');
+        expect(got.cover_fetched).toBe(true);
+        expect(got.manga.id).toBe('m-1');
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/admin\/mangas\/m-1\/resync$/);
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('POST');
+    });
+
+    it('resyncManga surfaces 503 service_unavailable when the daemon is off', async () => {
+        fetchSpy.mockResolvedValueOnce(
+            envelope(503, 'service_unavailable', 'crawler daemon is disabled')
+        );
+        await expect(resyncManga('m-1')).rejects.toMatchObject({
+            status: 503,
+            code: 'service_unavailable'
+        });
+    });
+
+    it('resyncChapter POSTs to /v1/admin/chapters/{id}/resync and returns the envelope', async () => {
+        const resp = {
+            chapter: {
+                id: 'c-1',
+                manga_id: 'm-1',
+                number: 1,
+                title: 'Foo',
+                page_count: 7,
+                created_at: '2026-01-01T00:00:00Z'
+            },
+            outcome: 'fetched',
+            pages: 7
+        };
+        fetchSpy.mockResolvedValueOnce(ok(resp));
+        const got = await resyncChapter('c-1');
+        expect(got.outcome).toBe('fetched');
+        expect(got.pages).toBe(7);
+        expect(got.chapter.page_count).toBe(7);
+        const url = fetchSpy.mock.calls[0][0] as string;
+        expect(url).toMatch(/\/v1\/admin\/chapters\/c-1\/resync$/);
+        const init = fetchSpy.mock.calls[0][1] as RequestInit;
+        expect(init.method).toBe('POST');
+    });
+
+    it('resyncChapter handles the "skipped" outcome envelope', async () => {
+        const resp = {
+            chapter: {
+                id: 'c-1',
+                manga_id: 'm-1',
+                number: 1,
+                title: null,
+                page_count: 7,
+                created_at: '2026-01-01T00:00:00Z'
+            },
+            outcome: 'skipped',
+            pages: null
+        };
+        fetchSpy.mockResolvedValueOnce(ok(resp));
+        const got = await resyncChapter('c-1');
+        expect(got.outcome).toBe('skipped');
+        expect(got.pages).toBeNull();
+    });
 });

frontend/src/lib/api/admin.ts

@@ -5,6 +5,8 @@
 
 import { request, type Page } from './client';
 import type { User } from './auth';
+import type { MangaDetail } from './mangas';
+import type { Chapter } from './chapters';
 
 // ---- users -----------------------------------------------------------------
 
@@ -176,3 +178,39 @@ export type SystemStats = {
 export async function getSystemStats(): Promise<SystemStats> {
     return request<SystemStats>('/v1/admin/system');
 }
+
+// ---- force resync ----------------------------------------------------------
+
+export type MangaResyncResponse = {
+    manga: MangaDetail;
+    metadata_status: 'new' | 'updated' | 'unchanged';
+    cover_fetched: boolean;
+};
+
+export type ChapterResyncResponse = {
+    chapter: Chapter;
+    outcome: 'fetched' | 'skipped';
+    /** Page count when `outcome === 'fetched'`; null when skipped. */
+    pages: number | null;
+};
+
+/** POST /v1/admin/mangas/:id/resync — refetches metadata + cover from
+ *  the manga's live crawler source. Long-running (one HTTP request per
+ *  Chromium nav + image download), so the UI should disable the trigger
+ *  and surface progress. */
+export async function resyncManga(id: string): Promise<MangaResyncResponse> {
+    return request<MangaResyncResponse>(
+        `/v1/admin/mangas/${encodeURIComponent(id)}/resync`,
+        { method: 'POST' }
+    );
+}
+
+/** POST /v1/admin/chapters/:id/resync — force-refetches a chapter's
+ *  pages even if `page_count > 0`. Same long-running caveat as
+ *  `resyncManga`. */
+export async function resyncChapter(id: string): Promise<ChapterResyncResponse> {
+    return request<ChapterResyncResponse>(
+        `/v1/admin/chapters/${encodeURIComponent(id)}/resync`,
+        { method: 'POST' }
+    );
+}

frontend/src/lib/api/auth.ts

@@ -102,10 +102,14 @@ export async function deleteToken(id: string): Promise<void> {
 }
 
 export type AuthConfig = {
-    /** When false, /v1/auth/register returns 403 and the UI should
+    /** Effective value (`allow_self_register && !private_mode`).
+     * When false, /v1/auth/register returns 403 and the UI should
      * hide its register affordance. Admins can still mint accounts
      * via POST /v1/admin/users. */
     self_register_enabled: boolean;
+    /** When true, every read endpoint requires auth and anonymous
+     * visitors are redirected to `/login` (see `+layout.ts`). */
+    private_mode: boolean;
 };
 
 /** Public — no auth, no cookie required. */

frontend/src/lib/auth-config.svelte.ts

@@ -16,6 +16,7 @@ import { getAuthConfig } from './api/auth';
 
 class AuthConfigStore {
     self_register_enabled = $state(true);
+    private_mode = $state(false);
     loaded = $state(false);
     private loading = false;
 
@@ -25,6 +26,7 @@ class AuthConfigStore {
         try {
             const cfg = await getAuthConfig();
             this.self_register_enabled = cfg.self_register_enabled;
+            this.private_mode = cfg.private_mode;
             this.loaded = true;
         } catch {
             // Keep optimistic default; next page mount will retry.
@@ -32,6 +34,16 @@ class AuthConfigStore {
             this.loading = false;
         }
     }
+
+    /** Seed from server-rendered layout data so the very first paint
+     *  doesn't flash the loading state. Used by `+layout.ts` /
+     *  `+layout.svelte` on the universal-load path. Safe to call from
+     *  SSR (no `browser` guard) since it touches only reactive state. */
+    seed(cfg: { self_register_enabled: boolean; private_mode: boolean }): void {
+        this.self_register_enabled = cfg.self_register_enabled;
+        this.private_mode = cfg.private_mode;
+        this.loaded = true;
+    }
 }
 
 export const authConfig = new AuthConfigStore();

frontend/src/lib/components/Pager.svelte

@@ -0,0 +1,128 @@
+<script lang="ts">
+    type Props = {
+        page: number;
+        totalPages: number;
+        onChange: (page: number) => void;
+        testid?: string;
+    };
+
+    let { page, totalPages, onChange, testid }: Props = $props();
+
+    type Slot = number | 'ellipsis';
+
+    // Compact layout: always show first + last, surround the current page with
+    // its direct neighbours, and use "…" to elide the rest. Keeps the bar to
+    // at most 7 buttons regardless of totalPages.
+    function buildSlots(p: number, total: number): Slot[] {
+        if (total <= 7) {
+            return Array.from({ length: total }, (_, i) => i + 1);
+        }
+        const out: Slot[] = [1];
+        if (p <= 4) {
+            for (let i = 2; i <= 5; i++) out.push(i);
+            out.push('ellipsis');
+            out.push(total);
+        } else if (p >= total - 3) {
+            out.push('ellipsis');
+            for (let i = total - 4; i <= total; i++) out.push(i);
+        } else {
+            out.push('ellipsis');
+            out.push(p - 1);
+            out.push(p);
+            out.push(p + 1);
+            out.push('ellipsis');
+            out.push(total);
+        }
+        return out;
+    }
+
+    const slots = $derived(buildSlots(page, totalPages));
+</script>
+
+{#if totalPages > 1}
+    <nav class="pager" aria-label="Pagination" data-testid={testid}>
+        <button
+            type="button"
+            class="step"
+            disabled={page <= 1}
+            onclick={() => onChange(page - 1)}
+            aria-label="Previous page"
+        >
+            ‹ Prev
+        </button>
+
+        {#each slots as slot, i (i)}
+            {#if slot === 'ellipsis'}
+                <span class="ellipsis" aria-hidden="true">…</span>
+            {:else}
+                <button
+                    type="button"
+                    class="num"
+                    class:active={slot === page}
+                    aria-current={slot === page ? 'page' : undefined}
+                    aria-label={`Go to page ${slot}`}
+                    onclick={() => onChange(slot)}
+                >
+                    {slot}
+                </button>
+            {/if}
+        {/each}
+
+        <button
+            type="button"
+            class="step"
+            disabled={page >= totalPages}
+            onclick={() => onChange(page + 1)}
+            aria-label="Next page"
+        >
+            Next ›
+        </button>
+    </nav>
+{/if}
+
+<style>
+    .pager {
+        display: flex;
+        flex-wrap: wrap;
+        align-items: center;
+        gap: var(--space-1);
+        margin: var(--space-4) 0;
+        justify-content: center;
+    }
+
+    .step,
+    .num {
+        min-width: 36px;
+        height: 36px;
+        padding: 0 var(--space-2);
+        background: var(--surface);
+        border: 1px solid var(--border);
+        border-radius: var(--radius-md);
+        color: var(--text);
+        cursor: pointer;
+        font-size: var(--font-sm);
+    }
+
+    .step:hover:not(:disabled),
+    .num:hover:not(.active) {
+        border-color: var(--primary);
+    }
+
+    .step:disabled {
+        opacity: 0.4;
+        cursor: not-allowed;
+    }
+
+    .num.active {
+        background: var(--primary);
+        color: var(--primary-contrast);
+        border-color: var(--primary);
+        cursor: default;
+    }
+
+    .ellipsis {
+        padding: 0 var(--space-1);
+        color: var(--text-muted);
+        user-select: none;
+    }
+</style>

frontend/src/lib/components/Pager.svelte.test.ts

@@ -0,0 +1,77 @@
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import { render, screen, cleanup } from '@testing-library/svelte';
+import Pager from './Pager.svelte';
+
+afterEach(() => cleanup());
+
+describe('Pager', () => {
+    it('renders nothing when totalPages <= 1', () => {
+        const { container } = render(Pager, { props: { page: 1, totalPages: 1, onChange: () => {} } });
+        expect(container.querySelector('nav')).toBeNull();
+    });
+
+    it('disables Prev on the first page and Next on the last', () => {
+        const { rerender } = render(Pager, {
+            props: { page: 1, totalPages: 5, onChange: () => {} }
+        });
+        expect((screen.getByRole('button', { name: /prev/i }) as HTMLButtonElement).disabled).toBe(true);
+        expect((screen.getByRole('button', { name: /next/i }) as HTMLButtonElement).disabled).toBe(false);
+
+        rerender({ page: 5, totalPages: 5, onChange: () => {} });
+        expect((screen.getByRole('button', { name: /prev/i }) as HTMLButtonElement).disabled).toBe(false);
+        expect((screen.getByRole('button', { name: /next/i }) as HTMLButtonElement).disabled).toBe(true);
+    });
+
+    it('marks the current page button as aria-current', () => {
+        render(Pager, { props: { page: 3, totalPages: 5, onChange: () => {} } });
+        const current = screen.getByRole('button', { name: /go to page 3/i });
+        expect(current.getAttribute('aria-current')).toBe('page');
+    });
+
+    it('fires onChange with the clicked page number', async () => {
+        const onChange = vi.fn();
+        render(Pager, { props: { page: 1, totalPages: 5, onChange } });
+        screen.getByRole('button', { name: /go to page 3/i }).click();
+        expect(onChange).toHaveBeenCalledWith(3);
+    });
+
+    it('Prev decrements and Next increments via onChange', () => {
+        const onChange = vi.fn();
+        render(Pager, { props: { page: 3, totalPages: 5, onChange } });
+        screen.getByRole('button', { name: /prev/i }).click();
+        screen.getByRole('button', { name: /next/i }).click();
+        expect(onChange).toHaveBeenNthCalledWith(1, 2);
+        expect(onChange).toHaveBeenNthCalledWith(2, 4);
+    });
+
+    it('shows every page button when totalPages <= 7', () => {
+        render(Pager, { props: { page: 4, totalPages: 7, onChange: () => {} } });
+        for (let n = 1; n <= 7; n++) {
+            expect(screen.getByRole('button', { name: new RegExp(`go to page ${n}$`, 'i') })).toBeTruthy();
+        }
+    });
+
+    it('collapses middle pages with ellipsis when totalPages > 7 and current is in the middle', () => {
+        render(Pager, { props: { page: 10, totalPages: 24, onChange: () => {} } });
+        // First and last are always shown
+        expect(screen.getByRole('button', { name: /go to page 1$/i })).toBeTruthy();
+        expect(screen.getByRole('button', { name: /go to page 24$/i })).toBeTruthy();
+        // Current and direct neighbours are shown
+        expect(screen.getByRole('button', { name: /go to page 9$/i })).toBeTruthy();
+        expect(screen.getByRole('button', { name: /go to page 10$/i })).toBeTruthy();
+        expect(screen.getByRole('button', { name: /go to page 11$/i })).toBeTruthy();
+        // Distant pages are NOT rendered as buttons
+        expect(screen.queryByRole('button', { name: /go to page 2$/i })).toBeNull();
+        expect(screen.queryByRole('button', { name: /go to page 23$/i })).toBeNull();
+        // Ellipsis appears on both sides
+        const ellipses = screen.getAllByText('…');
+        expect(ellipses.length).toBeGreaterThanOrEqual(2);
+    });
+
+    it('does not duplicate boundary buttons when current is near the edge', () => {
+        render(Pager, { props: { page: 2, totalPages: 20, onChange: () => {} } });
+        // Each page button rendered should be unique — no duplicate "go to page 1"
+        const first = screen.getAllByRole('button', { name: /go to page 1$/i });
+        expect(first.length).toBe(1);
+    });
+});

frontend/src/routes/+layout.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
     import { onMount, onDestroy } from 'svelte';
     import { goto } from '$app/navigation';
+    import { page } from '$app/stores';
     import { logout } from '$lib/api/auth';
     import { authConfig } from '$lib/auth-config.svelte';
     import { preferences } from '$lib/preferences.svelte';
@@ -14,15 +15,49 @@
     import Shield from '@lucide/svelte/icons/shield';
     import '$lib/styles/tokens.css';
 
-    let { children } = $props();
+    let { children, data } = $props();
     let loggingOut = $state(false);
     let headerEl: HTMLElement | undefined = $state();
 
+    // Static-route title map. Dynamic pages (manga / author / collection /
+    // chapter) override this via their own <svelte:head><title>, since the
+    // title depends on data the layout doesn't have. Routes omitted here
+    // (notably the dynamic ones) fall through to the bare brand and rely
+    // on the page to set the descriptive form.
+    const STATIC_TITLES: Record<string, string> = {
+        '/': 'Mangalord',
+        '/login': 'Mangalord | Login',
+        '/register': 'Mangalord | Register',
+        '/upload': 'Mangalord | Upload',
+        '/bookmarks': 'Mangalord | Bookmarks',
+        '/collections': 'Mangalord | Collections',
+        '/profile': 'Mangalord | Profile',
+        '/profile/account': 'Mangalord | Account',
+        '/profile/bookmarks': 'Mangalord | Bookmarks',
+        '/profile/collections': 'Mangalord | Collections',
+        '/profile/history': 'Mangalord | Reading history',
+        '/profile/preferences': 'Mangalord | Preferences',
+        '/admin': 'Mangalord | Admin',
+        '/admin/mangas': 'Mangalord | Admin · Mangas',
+        '/admin/users': 'Mangalord | Admin · Users',
+        '/admin/system': 'Mangalord | Admin · System'
+    };
+
+    const layoutTitle = $derived(STATIC_TITLES[$page.route?.id ?? ''] ?? 'Mangalord');
+
+    // Seed authConfig from the universal layout load. $effect keeps
+    // the store in sync if `data` is replaced by a subsequent layout
+    // load (client-side nav). The first run also covers initial
+    // hydration so the navbar's register link reflects the real
+    // server flag without a separate fetch.
+    $effect(() => {
+        authConfig.seed(data.authConfig);
+    });
+
     onMount(() => {
         theme.init();
         preferences.init();
         if (!session.loaded) session.refresh();
-        if (!authConfig.loaded) authConfig.load();
 
         // Publish the header's measured height as a CSS custom
         // property so sticky descendants (e.g. the reader nav) can
@@ -70,6 +105,10 @@
     }
 </script>
 
+<svelte:head>
+    <title>{layoutTitle}</title>
+</svelte:head>
+
 <header bind:this={headerEl}>
     <nav aria-label="primary">
         <a class="brand" href="/">Mangalord</a>

frontend/src/routes/+layout.ts

@@ -0,0 +1,41 @@
+// Universal root load. Surfaces /auth/config to every page so the
+// navbar + layout can render without an extra round-trip, and — when
+// the backend reports PRIVATE_MODE=true — bounces anonymous visitors
+// to /login before any page-specific load fires. The backend
+// middleware is still the source of truth for the gate; this just
+// matches the UX so users don't see a page full of failed fetches.
+import type { LayoutLoad } from './$types';
+import { redirect } from '@sveltejs/kit';
+import { getAuthConfig, me, type AuthConfig } from '$lib/api/auth';
+
+// Paths reachable anonymously even when private_mode is on. /login is
+// the entry point of the auth flow; everything else (including
+// /register, which is force-blocked in private mode) bounces.
+const PRIVATE_MODE_BYPASS = new Set(['/login']);
+
+const PUBLIC_DEFAULTS: AuthConfig = {
+    self_register_enabled: true,
+    private_mode: false
+};
+
+export const load: LayoutLoad = async ({ url }) => {
+    let authConfig: AuthConfig = PUBLIC_DEFAULTS;
+    try {
+        authConfig = await getAuthConfig();
+    } catch {
+        // Fail-soft: keep the optimistic public-mode defaults so a
+        // backend hiccup doesn't lock anyone out of the login page.
+        // No private data can leak through here — the backend
+        // middleware is still authoritative for the gate.
+    }
+
+    if (authConfig.private_mode && !PRIVATE_MODE_BYPASS.has(url.pathname)) {
+        const user = await me().catch(() => null);
+        if (!user) {
+            const next = url.pathname + url.search;
+            redirect(302, `/login?next=${encodeURIComponent(next)}`);
+        }
+    }
+
+    return { authConfig };
+};

frontend/src/routes/+page.svelte

@@ -13,10 +13,13 @@
     import { listTags, type Tag } from '$lib/api/tags';
     import Chip from '$lib/components/Chip.svelte';
     import MangaCard from '$lib/components/MangaCard.svelte';
+    import Pager from '$lib/components/Pager.svelte';
     import Search from '@lucide/svelte/icons/search';
     import SlidersHorizontal from '@lucide/svelte/icons/sliders-horizontal';
     import Plus from '@lucide/svelte/icons/plus';
 
+    const PAGE_SIZE = 50;
+
     let mangas: MangaCardData[] = $state([]);
     let search = $state('');
     let sort: MangaSort = $state('recent');
@@ -36,11 +39,21 @@
     let total: number | null = $state(null);
     let loading = $state(true);
     let error: string | null = $state(null);
+    let currentPage = $state(1);
 
     const activeFilterCount = $derived(
         (statusFilter ? 1 : 0) + selectedGenres.length + selectedTags.length
     );
 
+    const totalPages = $derived(
+        total != null && total > 0 ? Math.ceil(total / PAGE_SIZE) : 1
+    );
+
+    // 1-indexed range like "51–100 of 237", clamped to the actual loaded set
+    // in case the last page is short.
+    const rangeStart = $derived(mangas.length === 0 ? 0 : (currentPage - 1) * PAGE_SIZE + 1);
+    const rangeEnd = $derived((currentPage - 1) * PAGE_SIZE + mangas.length);
+
     async function load() {
         loading = true;
         error = null;
@@ -50,7 +63,9 @@
                 status: statusFilter || undefined,
                 genreIds: selectedGenres.map((g) => g.id),
                 tagIds: selectedTags.map((t) => t.id),
-                sort
+                sort,
+                limit: PAGE_SIZE,
+                offset: (currentPage - 1) * PAGE_SIZE
             });
             mangas = result.items;
             total = result.page.total;
@@ -71,11 +86,29 @@
             params.set('genres', selectedGenres.map((g) => g.id).join(','));
         if (selectedTags.length)
             params.set('tags', selectedTags.map((t) => t.id).join(','));
+        if (currentPage > 1) params.set('page', String(currentPage));
         const qs = params.toString();
         const url = qs ? `/?${qs}` : '/';
         goto(url, { replaceState: true, keepFocus: true, noScroll: true });
     }
 
+    // Filter / search / sort changes invalidate the current page — drop back
+    // to page 1 so the user isn't stranded on an out-of-range page when the
+    // result set shrinks. Direct page navigation calls `goToPage()` instead.
+    function resetAndReload() {
+        currentPage = 1;
+        syncUrl();
+        load();
+    }
+
+    function goToPage(p: number) {
+        if (p === currentPage) return;
+        currentPage = p;
+        syncUrl();
+        load();
+        if (browser) window.scrollTo({ top: 0, behavior: 'smooth' });
+    }
+
     async function hydrateFromUrl() {
         // Parse the query and resolve the supplied ids back to full Tag /
         // Genre objects so the chip rows render real labels.
@@ -100,6 +133,8 @@
             const tags = await listTags({ limit: 50 });
             selectedTags = tags.filter((t) => tagIds.includes(t.id));
         }
+        const pageParam = Number(url.searchParams.get('page') ?? '1');
+        currentPage = Number.isFinite(pageParam) && pageParam >= 1 ? Math.floor(pageParam) : 1;
         // Open the filters panel if anything is active so the user can see why.
         if (statusFilter || selectedGenres.length || selectedTags.length) {
             filtersOpen = true;
@@ -108,32 +143,27 @@
 
     async function onSubmit(e: SubmitEvent) {
         e.preventDefault();
-        syncUrl();
+        resetAndReload();
-        await load();
     }
 
     function onSortChange() {
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     function onStatusChange() {
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     function toggleGenre(g: Genre) {
         selectedGenres = selectedGenres.some((x) => x.id === g.id)
             ? selectedGenres.filter((x) => x.id !== g.id)
             : [...selectedGenres, g];
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     function removeTag(t: Tag) {
         selectedTags = selectedTags.filter((x) => x.id !== t.id);
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     function pickTag(t: Tag) {
@@ -143,8 +173,7 @@
         tagDraft = '';
         tagSuggestions = [];
         tagSuggestHighlight = -1;
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     function onTagDraftInput() {
@@ -192,8 +221,7 @@
         statusFilter = '';
         selectedGenres = [];
         selectedTags = [];
-        syncUrl();
+        resetAndReload();
-        load();
     }
 
     onMount(async () => {
@@ -383,7 +411,7 @@
 {:else}
     {#if total !== null}
         <p class="count" data-testid="manga-total">
-            Showing {mangas.length} of {total}
+            Showing {rangeStart}–{rangeEnd} of {total}
         </p>
     {/if}
     <ul class="manga-grid" data-testid="manga-list">
@@ -391,6 +419,12 @@
             <MangaCard manga={m} authors={m.authors} genres={m.genres} />
         {/each}
     </ul>
+    <Pager
+        page={currentPage}
+        {totalPages}
+        onChange={goToPage}
+        testid="manga-pager"
+    />
 {/if}
 
 <style>

frontend/src/routes/admin/mangas/+page.svelte

@@ -71,16 +71,19 @@
 >
     <input
         type="search"
-        placeholder="search by title"
+        placeholder="Search by title"
         bind:value={search}
         data-testid="admin-mangas-search"
     />
+    <label class="sync-label">
+        <span>Sync state</span>
         <select bind:value={syncFilter} aria-label="sync state">
-        <option value="">all states</option>
+            <option value="">All</option>
-        <option value="in_progress">in progress</option>
+            <option value="in_progress">In progress</option>
-        <option value="dropped">dropped</option>
+            <option value="dropped">Dropped</option>
-        <option value="synced">synced</option>
+            <option value="synced">Synced</option>
         </select>
+    </label>
     <button type="submit">Search</button>
 </form>
 
@@ -173,17 +176,28 @@
     }
     form {
         display: flex;
+        flex-wrap: wrap;
+        align-items: center;
         gap: var(--space-2);
         margin-bottom: var(--space-3);
     }
     input[type='search'] {
         flex: 1;
+        min-width: 0;
+        max-width: 24rem;
         padding: var(--space-2) var(--space-3);
         border: 1px solid var(--border);
         border-radius: var(--radius-md);
         background: var(--surface);
         color: var(--text);
     }
+    .sync-label {
+        display: inline-flex;
+        align-items: center;
+        gap: var(--space-2);
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+    }
     select {
         padding: var(--space-2) var(--space-3);
         border-radius: var(--radius-md);

frontend/src/routes/authors/[id]/+page.svelte

@@ -1,15 +1,33 @@
 <script lang="ts">
     import MangaCard from '$lib/components/MangaCard.svelte';
+    import Pager from '$lib/components/Pager.svelte';
     import ArrowLeft from '@lucide/svelte/icons/arrow-left';
+    import { goto } from '$app/navigation';
+    import { page } from '$app/stores';
 
     let { data } = $props();
     const author = $derived(data.author);
     const mangas = $derived(data.mangas);
     const total = $derived(data.total);
+    const currentPage = $derived(data.currentPage);
+    const pageSize = $derived(data.pageSize);
+    const totalPages = $derived(
+        total != null && total > 0 ? Math.ceil(total / pageSize) : 1
+    );
+    const rangeStart = $derived(mangas.length === 0 ? 0 : (currentPage - 1) * pageSize + 1);
+    const rangeEnd = $derived((currentPage - 1) * pageSize + mangas.length);
+
+    function goToPage(p: number) {
+        if (p === currentPage) return;
+        const url = new URL($page.url);
+        if (p === 1) url.searchParams.delete('page');
+        else url.searchParams.set('page', String(p));
+        goto(url.pathname + url.search, { noScroll: false });
+    }
 </script>
 
 <svelte:head>
-    <title>{author.name} — Mangalord</title>
+    <title>Mangalord | {author.name}</title>
 </svelte:head>
 
 <nav class="back">
@@ -34,7 +52,7 @@
 {:else}
     {#if total != null}
         <p class="meta" data-testid="author-shown-of-total">
-            Showing {mangas.length} of {total}
+            Showing {rangeStart}–{rangeEnd} of {total}
         </p>
     {/if}
     <ul class="manga-grid" data-testid="author-manga-list">
@@ -42,6 +60,12 @@
             <MangaCard manga={m} testid={`author-manga-${m.id}`} />
         {/each}
     </ul>
+    <Pager
+        page={currentPage}
+        {totalPages}
+        onChange={goToPage}
+        testid="author-pager"
+    />
 {/if}
 
 <style>

frontend/src/routes/authors/[id]/+page.ts

@@ -5,13 +5,27 @@ import type { PageLoad } from './$types';
 
 export const ssr = false;
 
-export const load: PageLoad = async ({ params }) => {
+const PAGE_SIZE = 50;
+
+export const load: PageLoad = async ({ params, url }) => {
+    const pageParam = Number(url.searchParams.get('page') ?? '1');
+    const currentPage =
+        Number.isFinite(pageParam) && pageParam >= 1 ? Math.floor(pageParam) : 1;
     try {
         const [author, mangas] = await Promise.all([
             getAuthor(params.id),
-            listAuthorMangas(params.id, { limit: 50 })
+            listAuthorMangas(params.id, {
+                limit: PAGE_SIZE,
+                offset: (currentPage - 1) * PAGE_SIZE
+            })
         ]);
-        return { author, mangas: mangas.items, total: mangas.page.total };
+        return {
+            author,
+            mangas: mangas.items,
+            total: mangas.page.total,
+            currentPage,
+            pageSize: PAGE_SIZE
+        };
     } catch (e) {
         // 404 surfaces as a real SvelteKit error so the framework shell
         // renders the standard not-found page instead of the route's

frontend/src/routes/bookmarks/+page.svelte

@@ -7,10 +7,6 @@
     const error = $derived(data.error);
 </script>
 
-<svelte:head>
-    <title>Bookmarks — Mangalord</title>
-</svelte:head>
-
 <h1>Bookmarks</h1>
 
 {#if error}

frontend/src/routes/collections/+page.svelte

@@ -5,10 +5,6 @@
     const collections = $derived(data.collections);
 </script>
 
-<svelte:head>
-    <title>Collections — Mangalord</title>
-</svelte:head>
-
 <h1>Collections</h1>
 
 {#if !data.authenticated}

frontend/src/routes/collections/[id]/+page.svelte

@@ -75,7 +75,7 @@
 </script>
 
 <svelte:head>
-    <title>{collection.name} — Mangalord</title>
+    <title>Mangalord | {collection.name}</title>
 </svelte:head>
 
 <nav class="back">

frontend/src/routes/layout.test.ts

@@ -0,0 +1,113 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+// Mock the API client *before* importing the load function so the
+// module under test picks up the mock when it resolves its imports.
+vi.mock('$lib/api/auth', () => ({
+    getAuthConfig: vi.fn(),
+    me: vi.fn()
+}));
+
+import { load } from './+layout';
+import { getAuthConfig, me, type AuthConfig } from '$lib/api/auth';
+
+type MinimalLoadEvent = { url: { pathname: string; search: string } };
+
+function event(pathname: string, search = ''): MinimalLoadEvent {
+    return { url: { pathname, search } };
+}
+
+// `LayoutLoad`'s declared return type is `void | …`. Our `load`
+// always returns `{ authConfig }`, but TypeScript can't narrow on
+// that at the call site. Wrap to remove the `void` arm so the
+// assertions stay terse.
+async function callLoad(ev: MinimalLoadEvent): Promise<{ authConfig: AuthConfig }> {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    const result = await load(ev as any);
+    return result as { authConfig: AuthConfig };
+}
+
+const PUBLIC_CFG = { self_register_enabled: true, private_mode: false };
+const PRIVATE_CFG = { self_register_enabled: false, private_mode: true };
+
+const aliceUser = {
+    id: 'u1',
+    username: 'alice',
+    created_at: '2026-01-01T00:00:00Z',
+    is_admin: false
+};
+
+describe('root +layout load', () => {
+    beforeEach(() => {
+        vi.mocked(getAuthConfig).mockReset();
+        vi.mocked(me).mockReset();
+    });
+
+    it('public mode: returns authConfig data, never calls me()', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PUBLIC_CFG);
+        const data = await callLoad(event('/'));
+        expect(data.authConfig).toEqual(PUBLIC_CFG);
+        expect(me).not.toHaveBeenCalled();
+    });
+
+    it('private mode + anonymous on `/`: throws redirect(302) to /login with next=', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PRIVATE_CFG);
+        vi.mocked(me).mockResolvedValue(null);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await expect(load(event('/') as any)).rejects.toMatchObject({
+            status: 302,
+            location: '/login?next=%2F'
+        });
+    });
+
+    it('private mode + anonymous on `/login`: passes through without redirect', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PRIVATE_CFG);
+        const data = await callLoad(event('/login'));
+        expect(data.authConfig.private_mode).toBe(true);
+        // me() must not run on the login page itself, otherwise anonymous
+        // visits make an extra round-trip every page load.
+        expect(me).not.toHaveBeenCalled();
+    });
+
+    it('private mode + logged-in user: no redirect, returns authConfig', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PRIVATE_CFG);
+        vi.mocked(me).mockResolvedValue(aliceUser);
+        const data = await callLoad(event('/'));
+        expect(data.authConfig).toEqual(PRIVATE_CFG);
+    });
+
+    it('private mode + anonymous: preserves pathname AND search in next=', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PRIVATE_CFG);
+        vi.mocked(me).mockResolvedValue(null);
+        await expect(
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any
+            load(event('/manga/abc', '?page=3') as any)
+        ).rejects.toMatchObject({
+            status: 302,
+            location: '/login?next=%2Fmanga%2Fabc%3Fpage%3D3'
+        });
+    });
+
+    it('private mode + anonymous on /register: redirects to /login (register is never reachable in private mode)', async () => {
+        vi.mocked(getAuthConfig).mockResolvedValue(PRIVATE_CFG);
+        vi.mocked(me).mockResolvedValue(null);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        await expect(load(event('/register') as any)).rejects.toMatchObject({
+            status: 302,
+            location: '/login?next=%2Fregister'
+        });
+    });
+
+    it('getAuthConfig failure: falls back to public-mode defaults, no redirect', async () => {
+        // The backend middleware is the source of truth for the gate;
+        // if the config probe blips, fail soft so a brief outage doesn't
+        // lock everyone out of even the login page. No private data
+        // can leak because the backend still 401s every request.
+        vi.mocked(getAuthConfig).mockRejectedValue(new Error('network'));
+        const data = await callLoad(event('/'));
+        expect(data.authConfig).toEqual({
+            self_register_enabled: true,
+            private_mode: false
+        });
+        expect(me).not.toHaveBeenCalled();
+    });
+});

frontend/src/routes/manga/[id]/+page.svelte

@@ -1,13 +1,15 @@
 <script lang="ts">
-    import { fileUrl } from '$lib/api/client';
+    import { fileUrl, ApiError } from '$lib/api/client';
     import { createBookmark, deleteBookmark, type Bookmark } from '$lib/api/bookmarks';
     import {
         attachTag,
         detachTag,
         type AuthorRef,
         type GenreRef,
+        type MangaDetail,
         type TagRef
     } from '$lib/api/mangas';
+    import { resyncManga } from '$lib/api/admin';
     import { listTags, type Tag } from '$lib/api/tags';
     import { session } from '$lib/session.svelte';
     import Chip from '$lib/components/Chip.svelte';
@@ -16,9 +18,15 @@
     import FolderPlus from '@lucide/svelte/icons/folder-plus';
     import Pencil from '@lucide/svelte/icons/pencil';
     import UploadCloud from '@lucide/svelte/icons/upload-cloud';
+    import RefreshCw from '@lucide/svelte/icons/refresh-cw';
 
     let { data } = $props();
-    const manga = $derived(data.manga);
+    // `manga` is locally overridable so a successful force resync can
+    // swap in the refreshed detail (new cover URL, refreshed status,
+    // etc.) without a router reload. Falls back to the server-loaded
+    // data otherwise.
+    let mangaOverride = $state<MangaDetail | null>(null);
+    const manga = $derived<MangaDetail>(mangaOverride ?? data.manga);
     const chapters = $derived(data.chapters);
     const readProgress = $derived(data.readProgress);
     /** Chapter row from the local chapters list when present (so we
@@ -171,10 +179,35 @@
     const statusLabel = $derived(manga.status === 'completed' ? 'Completed' : 'Ongoing');
 
     let collectionModalOpen = $state(false);
+
+    // ---- Admin force resync ----
+    let resyncBusy = $state(false);
+    let resyncMessage = $state<{ kind: 'ok' | 'err'; text: string } | null>(null);
+    async function forceResync() {
+        if (!session.user?.is_admin || resyncBusy) return;
+        resyncBusy = true;
+        resyncMessage = null;
+        try {
+            const r = await resyncManga(manga.id);
+            mangaOverride = r.manga;
+            const coverNote = r.cover_fetched
+                ? ' Cover re-downloaded.'
+                : ' Cover unchanged.';
+            resyncMessage = {
+                kind: 'ok',
+                text: `Metadata ${r.metadata_status}.${coverNote}`
+            };
+        } catch (e) {
+            const msg = e instanceof ApiError ? e.message : (e as Error).message;
+            resyncMessage = { kind: 'err', text: msg };
+        } finally {
+            resyncBusy = false;
+        }
+    }
 </script>
 
 <svelte:head>
-    <title>{manga.title} — Mangalord</title>
+    <title>Mangalord | {manga.title}</title>
 </svelte:head>
 
 <article>
@@ -344,7 +377,34 @@
                         <UploadCloud size={16} aria-hidden="true" />
                         <span>Upload chapter</span>
                     </a>
+                    {#if session.user.is_admin}
+                        <button
+                            type="button"
+                            class="action"
+                            onclick={forceResync}
+                            disabled={resyncBusy}
+                            title="Refetch metadata + cover from the crawler source"
+                            data-testid="force-resync-manga"
+                        >
+                            <RefreshCw
+                                size={16}
+                                aria-hidden="true"
+                                class={resyncBusy ? 'spin' : ''}
+                            />
+                            <span>{resyncBusy ? 'Resyncing…' : 'Force resync'}</span>
+                        </button>
+                    {/if}
                 </div>
+                {#if resyncMessage}
+                    <p
+                        class="resync-msg"
+                        class:err={resyncMessage.kind === 'err'}
+                        role="status"
+                        data-testid="force-resync-message"
+                    >
+                        {resyncMessage.text}
+                    </p>
+                {/if}
             {:else}
                 <a class="action" href="/login" data-testid="bookmark-signin">
                     Sign in to bookmark or collect
@@ -586,6 +646,29 @@
         color: var(--text);
     }
 
+    .resync-msg {
+        margin-top: var(--space-2);
+        color: var(--text-muted);
+        font-size: var(--font-sm);
+    }
+
+    .resync-msg.err {
+        color: var(--danger);
+    }
+
+    :global(.spin) {
+        animation: spin 0.9s linear infinite;
+    }
+
+    @keyframes spin {
+        from {
+            transform: rotate(0deg);
+        }
+        to {
+            transform: rotate(360deg);
+        }
+    }
+
     .continue {
         display: flex;
         flex-direction: column;

frontend/src/routes/manga/[id]/chapter/[chapter_id]/+page.svelte

@@ -1,10 +1,11 @@
 <script lang="ts">
     import { onMount, onDestroy } from 'svelte';
-    import { goto } from '$app/navigation';
+    import { goto, invalidateAll } from '$app/navigation';
-    import { fileUrl } from '$lib/api/client';
+    import { fileUrl, ApiError } from '$lib/api/client';
     import { GAP_PX, type ReaderPageGap } from '$lib/api/preferences';
     import { preferences } from '$lib/preferences.svelte';
     import { updateReadProgress } from '$lib/api/read_progress';
+    import { resyncChapter } from '$lib/api/admin';
     import { readerFullscreen } from '$lib/reader-fullscreen.svelte';
     import { session } from '$lib/session.svelte';
     import ChevronLeft from '@lucide/svelte/icons/chevron-left';
@@ -15,6 +16,7 @@
     import ScrollText from '@lucide/svelte/icons/scroll-text';
     import Maximize2 from '@lucide/svelte/icons/maximize-2';
     import Minimize2 from '@lucide/svelte/icons/minimize-2';
+    import RefreshCw from '@lucide/svelte/icons/refresh-cw';
 
     let { data } = $props();
     const manga = $derived(data.manga);
@@ -27,8 +29,8 @@
 
     const pageTitle = $derived(
         chapter.title
-            ? `${manga.title} — Ch. ${chapter.number}: ${chapter.title}`
+            ? `Mangalord | ${manga.title} · Ch. ${chapter.number}: ${chapter.title}`
-            : `${manga.title} — Ch. ${chapter.number}`
+            : `Mangalord | ${manga.title} · Ch. ${chapter.number}`
     );
 
     // Prev/next chapter computed from the chapter list. listChapters
@@ -256,6 +258,36 @@
         if (typeof window !== 'undefined') window.removeEventListener('keydown', onKeydown);
     });
 
+    // ---- Admin force resync (current chapter) ----
+    let resyncBusy = $state(false);
+    let resyncMessage = $state<{ kind: 'ok' | 'err'; text: string } | null>(null);
+    async function forceResync() {
+        if (!session.user?.is_admin || resyncBusy) return;
+        resyncBusy = true;
+        resyncMessage = null;
+        try {
+            const r = await resyncChapter(chapter.id);
+            if (r.outcome === 'fetched') {
+                resyncMessage = {
+                    kind: 'ok',
+                    text: `Refetched ${r.pages} page${r.pages === 1 ? '' : 's'}. Reloading…`
+                };
+                // Re-run all loaders for this route so the reader picks
+                // up the freshly-downloaded pages. The page.ts loader
+                // doesn't `depends()` on anything explicitly, so
+                // invalidateAll is the right brush here.
+                await invalidateAll();
+            } else {
+                resyncMessage = { kind: 'ok', text: 'No new pages — source had nothing fresh.' };
+            }
+        } catch (e) {
+            const msg = e instanceof ApiError ? e.message : (e as Error).message;
+            resyncMessage = { kind: 'err', text: msg };
+        } finally {
+            resyncBusy = false;
+        }
+    }
+
     // ---- Reading progress tracking ----
     //
     // High-water mark seeded from the server: progress only ever moves
@@ -481,6 +513,23 @@
         {/if}
     </span>
 
+    {#if session.user?.is_admin}
+        <button
+            type="button"
+            class="reader-resync"
+            onclick={forceResync}
+            disabled={resyncBusy}
+            title={resyncMessage?.kind === 'err'
+                ? resyncMessage.text
+                : 'Force refetch this chapter from the crawler source'}
+            aria-label="Force resync chapter"
+            data-testid="force-resync-chapter"
+        >
+            <RefreshCw size={16} aria-hidden="true" class={resyncBusy ? 'spin' : ''} />
+            <span>{resyncBusy ? 'Resyncing…' : 'Force resync'}</span>
+        </button>
+    {/if}
+
     <button
         type="button"
         class="fullscreen-toggle"
@@ -494,6 +543,17 @@
     </button>
 </nav>
 
+{#if resyncMessage}
+    <p
+        class="resync-toast"
+        class:err={resyncMessage.kind === 'err'}
+        role="status"
+        data-testid="force-resync-message"
+    >
+        {resyncMessage.text}
+    </p>
+{/if}
+
 <!--
     Floating exit affordance — only rendered while focus mode is on.
     Lives in the top-right corner with a low resting opacity so it
@@ -911,7 +971,8 @@
     }
 
     /* ===== Focus-mode controls ===== */
-    .fullscreen-toggle {
+    .fullscreen-toggle,
+    .reader-resync {
         display: inline-flex;
         align-items: center;
         gap: var(--space-1);
@@ -925,12 +986,52 @@
         font-size: var(--font-xs);
     }
 
-    .fullscreen-toggle:hover {
+    .fullscreen-toggle:hover,
+    .reader-resync:hover:not(:disabled) {
         background: var(--surface-elevated);
         color: var(--text);
         border-color: var(--primary);
     }
 
+    .reader-resync:disabled {
+        opacity: 0.7;
+        cursor: progress;
+    }
+
+    .resync-toast {
+        position: fixed;
+        top: calc(var(--app-header-h) + var(--reader-nav-h, 48px) + var(--space-2));
+        right: var(--space-3);
+        z-index: 11;
+        margin: 0;
+        padding: var(--space-2) var(--space-3);
+        max-width: min(420px, calc(100vw - 2 * var(--space-3)));
+        background: var(--surface);
+        color: var(--text);
+        border: 1px solid var(--primary);
+        border-radius: var(--radius-md);
+        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
+        font-size: var(--font-sm);
+    }
+
+    .resync-toast.err {
+        border-color: var(--danger);
+        color: var(--danger);
+    }
+
+    :global(.spin) {
+        animation: spin 0.9s linear infinite;
+    }
+
+    @keyframes spin {
+        from {
+            transform: rotate(0deg);
+        }
+        to {
+            transform: rotate(360deg);
+        }
+    }
+
     /* Small floating exit affordance — corner-pinned, low resting
        opacity so it doesn't sit on the chapter image too aggressively
        but is still findable without hover. */

frontend/src/routes/manga/[id]/edit/+page.svelte

@@ -135,7 +135,7 @@
 </script>
 
 <svelte:head>
-    <title>Edit {manga.title} — Mangalord</title>
+    <title>Mangalord | Edit · {manga.title}</title>
 </svelte:head>
 
 <h1>Edit manga</h1>

frontend/src/routes/manga/[id]/upload-chapter/+page.svelte

@@ -57,7 +57,7 @@
 </script>
 
 <svelte:head>
-    <title>Upload chapter — {manga.title} — Mangalord</title>
+    <title>Mangalord | Upload chapter · {manga.title}</title>
 </svelte:head>
 
 <nav class="back">

frontend/src/routes/profile/+layout.svelte

@@ -35,10 +35,6 @@
     );
 </script>
 
-<svelte:head>
-    <title>Profile — Mangalord</title>
-</svelte:head>
-
 <header class="profile-header">
     <h1>Profile</h1>
     {#if !session.loaded}

frontend/src/routes/upload/+page.svelte

@@ -184,10 +184,6 @@
     }
 </script>
 
-<svelte:head>
-    <title>Upload — Mangalord</title>
-</svelte:head>
-
 <h1>Create manga</h1>
 
 {#if !session.loaded}

frontend/vite.config.ts

@@ -21,6 +21,12 @@ export default defineConfig(({ mode }) => {
             environment: 'jsdom',
             include: ['src/**/*.test.ts'],
             globals: false
+        },
+        resolve: {
+            // Use Svelte's browser entry under vitest so component tests can
+            // mount with @testing-library/svelte. The default (server entry)
+            // throws lifecycle_function_unavailable on mount().
+            conditions: mode === 'test' ? ['browser'] : []
         }
     };
 });

tor/entrypoint.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+# Mangalord wrapper around dockurr/tor's tor binary.
+#
+# We bypass the image's stock entrypoint for two reasons:
+#   1. It generates a `ControlPort 9051` line that binds to localhost
+#      only (tor's default), but our backend lives in a separate
+#      container and needs to reach 0.0.0.0:9051.
+#   2. It then *skips* writing HashedControlPassword whenever the
+#      user's torrc declares a ControlPort, so we can't both bind to
+#      0.0.0.0 and benefit from its auto-hashing — it's one or the
+#      other. Doing the hashing ourselves is simpler than threading
+#      around its logic.
+#
+# This wrapper hashes $PASSWORD with `tor --hash-password`, appends a
+# `HashedControlPassword` line to a writable copy of /etc/tor/torrc,
+# then execs tor. Container runs as root (image default); tor binds
+# 9050/9051 which don't require root and is fine inside a single-
+# purpose container.
+
+set -eu
+
+if [ -z "${PASSWORD:-}" ]; then
+    echo "ERROR: PASSWORD env must be set (the plain string the backend will" >&2
+    echo "       send as CRAWLER_TOR_CONTROL_PASSWORD)" >&2
+    exit 1
+fi
+
+# `tor --hash-password` prints the hash on the last line of stdout
+# (preceded by initialization noise).
+HASH=$(tor --hash-password "$PASSWORD" 2>/dev/null | tail -n1)
+if [ -z "$HASH" ]; then
+    echo "ERROR: 'tor --hash-password' produced no output" >&2
+    exit 1
+fi
+
+# /etc/tor/torrc is bind-mounted read-only, so copy + append.
+cp /etc/tor/torrc /tmp/torrc
+printf '\n# Injected by mangalord-entrypoint.sh from $PASSWORD env.\nHashedControlPassword %s\n' "$HASH" >> /tmp/torrc
+
+exec tor -f /tmp/torrc

tor/torrc

@@ -0,0 +1,38 @@
+# torrc for the Mangalord crawler.
+#
+# Mounted into the dockurr/tor container at /etc/tor/torrc. The
+# crawler talks to this daemon over the internal compose network only:
+# `expose:` on the tor service surfaces 9050/9051 to sibling
+# containers, never to the host.
+
+# SOCKS5 proxy that reqwest and Chromium use. IsolateDestAddr +
+# IsolateDestPort means each new (destination IP, port) draws a fresh
+# circuit — so a SIGNAL NEWNYM picks up promptly on the next
+# navigation instead of having to wait for an existing dirty circuit
+# to age out.
+SOCKSPort 0.0.0.0:9050 IsolateDestAddr IsolateDestPort
+
+# Control port for SIGNAL NEWNYM. We rely on the dockurr/tor
+# entrypoint to inject `HashedControlPassword <hash>` from its
+# PASSWORD env var (see docker-compose.yml `tor.environment.PASSWORD`)
+# via a higher-priority --defaults-torrc. We just need to declare the
+# port itself here.
+ControlPort 0.0.0.0:9051
+
+# Keep circuits dirty for a while so a single chapter (which serial-
+# fetches all its images through the same SOCKS endpoint) finishes on
+# one circuit rather than mid-circuit-rotating in a way that looks like
+# anti-bot evasion to the target. NEWNYM still forces a fresh circuit
+# immediately when we want one — this is just the idle-rotation knob.
+MaxCircuitDirtiness 600
+
+# Drop privileges to the image's `tor` user after binding ports.
+# Required because /var/lib/tor (the image's DataDirectory volume)
+# is owned by tor:tor and tor refuses to use a data dir it doesn't
+# own. Our entrypoint runs as root only so it can call
+# `tor --hash-password` and write /tmp/torrc.
+User tor
+
+# Data + logs.
+DataDirectory /var/lib/tor
+Log notice stdout