bugfix: subquery-wrap pending chapters query so DISTINCT + ORDER BY agree (0.26.1)

PG rejects `SELECT DISTINCT c.id, c.manga_id, cs.source_url ... ORDER BY
c.manga_id, c.created_at` because the ORDER BY references a column not in
the DISTINCT projection. Wrap the DISTINCT in a subquery (which includes
created_at) and apply the ORDER BY in the outer SELECT.

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

backend/Cargo.lock

@@ -1448,7 +1448,7 @@ checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 
 [[package]]
 name = "mangalord"
-version = "0.26.0"
+version = "0.26.1"
 dependencies = [
  "anyhow",
  "argon2",

backend/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mangalord"
-version = "0.26.0"
+version = "0.26.1"
 edition = "2021"
 default-run = "mangalord"
 

backend/src/bin/crawler.rs

@@ -424,16 +424,25 @@ async fn sync_bookmarked_chapter_content(
     workers: usize,
     force_refetch: bool,
 ) -> anyhow::Result<()> {
+    // Subquery first so DISTINCT collapses multi-user bookmark rows
+    // without forcing every ORDER BY column into the SELECT list (PG
+    // rejects `ORDER BY c.created_at` against `SELECT DISTINCT c.id,
+    // c.manga_id, cs.source_url` with "ORDER BY expressions must
+    // appear in select list"). Outer ORDER BY then groups chapters by
+    // their manga, oldest first, so backfills proceed in reading
+    // order per manga.
     let pending: Vec<(Uuid, Uuid, String)> = sqlx::query_as(
         r#"
-        SELECT DISTINCT c.id, c.manga_id, cs.source_url
+        SELECT id, manga_id, source_url FROM (
+            SELECT DISTINCT c.id, c.manga_id, c.created_at, cs.source_url
               FROM chapters c
               JOIN bookmarks b ON b.manga_id = c.manga_id
               JOIN chapter_sources cs ON cs.chapter_id = c.id
              WHERE cs.source_id = $1
                AND cs.dropped_at IS NULL
                AND (c.page_count = 0 OR $2)
-         ORDER BY c.manga_id, c.created_at ASC
+        ) sub
+        ORDER BY manga_id, created_at ASC
         "#,
     )
     .bind(source_id)

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mangalord-frontend",
-  "version": "0.26.0",
+  "version": "0.26.1",
   "private": true,
   "type": "module",
   "scripts": {