docs: hand-off report for 2026-06-05 session

Snapshot of main, in-flight branches, session-specific changes (CRAWLER_LIMIT
in the daemon, browser-restart clears session_expired), and dev-stack
commands — for whoever picks the work up next.

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

HANDOFF.md

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+# Hand-off — 2026-06-05
+
+Snapshot of repo state for whoever picks up next. Pair with [CLAUDE.md](CLAUDE.md) for the architecture, dev rules, and command crib.
+
+## Where main is
+
+`main` is at **0.52.0** (commit `679abae`, `feat(chapter): preserve source-site order in chapter list`).
+
+Recently landed (in order):
+- `0.52.0` — `feat(chapter)`: source-site order in chapter list; new `source_index` column + reverse-sort. Migration `0021_chapter_source_index.sql` runs on next backend start.
+- `0.51.2` — `fix(reader)`: drop `Chapter N:` prefix from title display; `chapterLabel()` helper in `$lib/api/chapters`.
+- `0.47.0` — `feat(crawler)`: honour `CRAWLER_LIMIT` in the in-process daemon (previously CLI-only).
+
+All three were authored this session.
+
+## In-flight branches (pushed, not yet on main)
+
+The remote now has 18 local-only branches. The ones most relevant to current work:
+
+| Branch | Tip ver | Notes |
+| --- | --- | --- |
+| `feat/crawler-observability-and-reliability` | 0.54.0 | Active dev branch — admin crawler dashboard, live status SSE, coordinated browser restart, dead-job requeue, runtime PHPSESSID refresh, reliability fixes. Now also carries the `restart_browser` clears-`session_expired` fix from this session (commit `fb4182f`, 0.53.1). |
+| `feat/private-mode` | 0.48.0 | Site-wide auth gate via `PRIVATE_MODE`. Already merged into main during this session. Branch left around for reference. |
+| `feat/cover-retry-and-force-resync` | 0.50.0 | Cover retry backfill + admin force-resync. Already merged into main. |
+
+The older `bugfix/*`, `chore/*`, and other `feat/*` branches are pre-0.40 era WIP — they predate this session and may be stale; verify before reviving.
+
+## Session-specific changes worth flagging
+
+### 1. `CRAWLER_LIMIT` now caps the daemon
+
+Before: `bin/crawler` honoured `CRAWLER_LIMIT`, but the in-process daemon called `pipeline::run_metadata_pass(..., 0, ...)` so it always swept the full catalog.
+
+Fix: `CrawlerConfig.manga_limit` reads `CRAWLER_LIMIT` (default `0` = no cap), threaded through `RealMetadataPass::run`. Same env var as the CLI.
+
+Tests: `backend/src/config.rs::tests::crawler_limit_env_populates_manga_limit` (and the unset default).
+
+### 2. Browser restart now drops the sticky `session_expired` flag
+
+On branch `feat/crawler-observability-and-reliability` only (not on main yet).
+
+Bug: hitting the admin "Restart browser" button ran `coordinated_restart` (which re-runs `on_launch` → re-injects PHPSESSID → re-probes), but `session_expired` stayed `true` regardless. UI continued to report Session Expired and chapter workers kept idling.
+
+Fix: on `Ok(())` from `coordinated_restart`, the handler now calls `c.session.clear_expired()`. Error path still leaves it set. See [backend/src/api/admin/crawler.rs:230-262](backend/src/api/admin/crawler.rs#L230-L262).
+
+Test: `backend/src/crawler/session_control.rs::tests::clear_expired_flips_sticky_flag_without_touching_session`.
+
+## Dev stack
+
+Compose ships db + tor (frontend runs natively). See `docker-compose.dev.yml`.
+
+```bash
+docker compose -f docker-compose.dev.yml up -d
+(cd frontend && npm run dev)   # http://localhost:5175
+```
+
+Backend dev command template (fill in `<START_URL>`):
+
+```bash
+cd backend && \
+  CRAWLER_START_URL="<START_URL>" \
+  CRAWLER_LIMIT=96 \
+  CRAWLER_DAEMON=true \
+  CRAWLER_PROXY=socks5h://localhost:9050 \
+  CRAWLER_TOR_CONTROL_URL=tcp://localhost:9051 \
+  CRAWLER_TOR_CONTROL_PASSWORD=dev-tor-password \
+  CRAWLER_ALLOW_ANY_HOST=true \
+  ADMIN_USERNAME=admin ADMIN_PASSWORD=admin \
+  cargo run --release
+```
+
+`backend/.env` already pins `DATABASE_URL`, `BIND_ADDRESS=0.0.0.0:18080`, `STORAGE_DIR`, `COOKIE_SECURE=false`. It also extends `RUST_LOG` to silence the noisy `chromiumoxide::conn` / `chromiumoxide::handler` WS-deserialize lines.
+
+## Open items / known nuance
+
+- **Vite generates `vite.config.ts.timestamp-*.mjs`** as a transient artifact when the dev server is running. It's not in `.gitignore`; consider adding `frontend/vite.config.ts.timestamp-*.mjs` to root `.gitignore` to stop it showing up in `git status`. Deleting the file is safe — Vite re-creates as needed.
+- **Pre-bump drift.** Manifest versions have been hand-bumped ahead of commits a couple of times during this session (e.g. `0.53.0` sitting uncommitted in the working tree). When you land work on the active branches, double-check the `backend/Cargo.toml`, `backend/Cargo.lock`, `frontend/package.json` triplet are in lockstep before committing.
+- **`feat/crawler-observability-and-reliability` is multi-feature.** It carries observability, reliability, runtime session control, dashboard, and now the session-expired-clear fix — landing it as one squash on main would be a sizeable diff. Consider whether to split it (e.g. split out the dashboard + dead-job requeue into its own slice) before merging.