fix(analysis): emit Cancelled event + assert lock-release after cancel (0.87.13)

Two 0.87.4 follow-ups:

1. Cron tick: existing shutdown-on-cancel test now also asserts the
   advisory lock is re-acquirable after cancel-during-tick. Without
   this, a refactor moving `pg_advisory_unlock` under the cancel arm
   would ship green and break multi-replica safety.

2. Analysis worker: cancel-mid-dispatch left the dashboard banner stuck
   on the cancelled page until a later page overwrote it. Add a
   `Cancelled` AnalysisEvent variant, publish on the cancel-release
   branch, wire the analysis and admin overview dashboards to clear
   on it. Per-page chip rolls back from `analyzing` to `queued`.

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

frontend/src/lib/api/admin.ts

@@ -857,7 +857,12 @@ export type AnalysisEvent =
           chapter_id: string | null;
       }
     | {
-          kind: 'started' | 'completed' | 'failed';
+          // `cancelled` fires when the worker drops an in-flight dispatch
+          // on daemon shutdown / settings-toggle-off. The lease was
+          // released, not failed — the page returns to pending. The
+          // dashboard banner clears on this so it doesn't stick on the
+          // cancelled page until another `started` overwrites it.
+          kind: 'started' | 'completed' | 'failed' | 'cancelled';
           page_id: string;
           manga_id: string;
           manga_title: string;

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

@@ -121,6 +121,16 @@
 
     function applyAnalysisEvent(ev: AnalysisEvent) {
         if (ev.kind === 'enqueued') return;
+        // Cancelled (daemon shutdown / settings toggle-off mid-dispatch)
+        // is a non-terminal release — the lease went back to pending.
+        // Clear the banner instead of frame-flipping to a "done"/"failed"
+        // misrepresentation.
+        if (ev.kind === 'cancelled') {
+            if (nowAnalyzing && nowAnalyzing.page === ev.page_number) {
+                nowAnalyzing = null;
+            }
+            return;
+        }
         const phase =
             ev.kind === 'started' ? 'analyzing' : ev.kind === 'completed' ? 'done' : 'failed';
         nowAnalyzing = {

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

@@ -247,6 +247,21 @@
                 scheduleClear(ev.page_id);
             }
             pushTicker(`✗ Failed page ${ev.page_number}`);
+        } else if (ev.kind === 'cancelled') {
+            // Daemon shutdown / analysis toggled off mid-dispatch. The
+            // lease was released, not failed — the page is still pending
+            // server-side. We just need to clear the "Analyzing pN" banner
+            // and roll the per-page live status back to queued so the
+            // chip doesn't stay spinner-frozen forever.
+            const cur = liveStatus[ev.page_id];
+            if (cur === 'analyzing') {
+                liveStatus = { ...liveStatus, [ev.page_id]: 'queued' };
+            }
+            if (nowAnalyzing?.page_id === ev.page_id) {
+                nowAnalyzing = null;
+                if (clearTimer) clearTimeout(clearTimer);
+            }
+            pushTicker(`↺ Cancelled page ${ev.page_number}`);
         }
     }