feat(unlinked-books): dismiss (ignore) or delete queue entries

Unidentified sync files used to be stuck: every KOReader re-sync
re-queues them, and there was no way to say "this isn't a book" or "I
don't want this one on the server".

Ignore is the durable dismiss: a new ignored_at column hides the row
from the page list, dashboard badge, and per-device API while the sync
keeps refreshing its metadata (the upsert never clears the column).
A collapsible "Ignored" section lists dismissed rows with Restore and
Delete so a misclick is recoverable. Delete is the hard exit — the row
is gone, and honestly re-queued if the device syncs that file again
(the confirm dialog says so).

Actions are page-scoped SSR routes: htmx swaps in the re-rendered
section so counts and buckets can never drift from the DB; ownership
is row → device → user (admins may act on any row). Integration tests
pin the lifecycle (hide everywhere, survive the sync upsert, restore,
delete), foreign-user 403s, and the render surface.

internal/database/queries/queries.sql

@@ -3701,12 +3701,12 @@ INSERT INTO unlinked_books (device_id, content_id, file_path, title, author, con
 VALUES ($1, $2, $3, $4, $5, $6)
 RETURNING *;
 
--- Get unlinked books for a device
+-- Get unlinked books for a device (ignored rows stay hidden)
 -- name: GetUnlinkedBooksByDevice :many
 SELECT ub.*, d.device_name, d.device_type
 FROM unlinked_books ub
 JOIN devices d ON ub.device_id = d.id
-WHERE ub.device_id = $1 AND ub.resolved = false
+WHERE ub.device_id = $1 AND ub.resolved = false AND ub.ignored_at IS NULL
 ORDER BY ub.last_seen_at DESC;
 
 -- Get unlinked book by ContentId
@@ -3724,11 +3724,11 @@ SET
 WHERE id = $1
 RETURNING *;
 
--- Count unlinked books for a device
+-- Count unlinked books for a device (ignored rows stay hidden)
 -- name: CountUnlinkedBooks :one
 SELECT COUNT(*) as count
 FROM unlinked_books
-WHERE device_id = $1 AND resolved = false;
+WHERE device_id = $1 AND resolved = false AND ignored_at IS NULL;
 
 -- Link unlinked book to media item
 -- name: LinkUnlinkedBook :one
@@ -3772,21 +3772,48 @@ SET file_path = EXCLUDED.file_path,
     last_seen_at = NOW()
 RETURNING *;
 
--- Banner count: unresolved queue rows across the caller's own devices.
+-- Banner count: unresolved, non-ignored queue rows across the caller's own
+-- devices. Ignored rows must not nag from the dashboard badge.
 -- name: CountUnresolvedUnlinkedBooksForUser :one
 SELECT COUNT(*) as count
 FROM unlinked_books ub
 JOIN devices d ON ub.device_id = d.id
-WHERE d.user_id = $1 AND ub.resolved = false;
+WHERE d.user_id = $1 AND ub.resolved = false AND ub.ignored_at IS NULL;
 
--- Page list: unresolved queue rows for the caller's own devices.
+-- Page list: unresolved queue rows for the caller's own devices (ignored
+-- rows are listed by ListIgnoredUnlinkedBooksForUser instead).
 -- name: ListUnresolvedUnlinkedBooksForUser :many
 SELECT ub.*, d.device_name, d.device_type
 FROM unlinked_books ub
 JOIN devices d ON ub.device_id = d.id
-WHERE d.user_id = $1 AND ub.resolved = false
+WHERE d.user_id = $1 AND ub.resolved = false AND ub.ignored_at IS NULL
 ORDER BY ub.last_seen_at DESC;
 
+-- Page list, ignored bucket: rows the user dismissed, kept for the
+-- collapsible "Ignored" section so a misclick is recoverable.
+-- name: ListIgnoredUnlinkedBooksForUser :many
+SELECT ub.*, d.device_name, d.device_type
+FROM unlinked_books ub
+JOIN devices d ON ub.device_id = d.id
+WHERE d.user_id = $1 AND ub.resolved = false AND ub.ignored_at IS NOT NULL
+ORDER BY ub.ignored_at DESC;
+
+-- Soft-dismiss one row (ownership is checked by the caller against the
+-- device's user_id before calling this).
+-- name: IgnoreUnlinkedBook :exec
+UPDATE unlinked_books SET ignored_at = NOW() WHERE id = $1;
+
+-- Undo a soft-dismiss.
+-- name: UnignoreUnlinkedBook :exec
+UPDATE unlinked_books SET ignored_at = NULL WHERE id = $1;
+
+-- Fetch one row together with its device's owner for authorization.
+-- name: GetUnlinkedBookWithOwner :one
+SELECT ub.*, d.user_id, d.device_name, d.device_type
+FROM unlinked_books ub
+JOIN devices d ON ub.device_id = d.id
+WHERE ub.id = $1;
+
 -- ============================================
 -- CAROUSEL-STYLE DASHBOARD
 -- ============================================