done column: 'verify N' header button to backfill ✓ → ✓✓

new POST /api/execute/verify-unverified that picks every plan with
status=done + verified=0 and runs handOffToJellyfin sequentially in
the background. each handoff fires the existing plan_update sse so
the done column promotes cards as jellyfin's verdict lands. exported
handOffToJellyfin so the route can reuse the same flow as a fresh job.

done column header shows a 'Verify N' action whenever there are
unverified done plans, alongside the existing 'Clear'. one click and
the user can backfill ✓✓ across every legacy done item without
re-transcoding.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/api/execute.ts

@@ -35,7 +35,7 @@ import type { Job, MediaItem, MediaStream } from "../types";
  * match the plan, so the check always passed immediately. Jellyfin is the
  * independent observer that matters.
  */
-async function handOffToJellyfin(itemId: number): Promise<void> {
+export async function handOffToJellyfin(itemId: number): Promise<void> {
 	const db = getDb();
 	const row = db.prepare("SELECT jellyfin_id FROM media_items WHERE id = ?").get(itemId) as
 		| { jellyfin_id: string }
@@ -354,6 +354,40 @@ app.post("/clear-completed", (c) => {
 	return c.json({ ok: true, cleared: result.changes });
 });
 
+// ─── Verify all unverified done plans ────────────────────────────────────────
+// Backfill: kicks off the post-job jellyfin handoff for every plan that's
+// status=done + verified=0. Sequential with a small inter-call delay to
+// avoid hammering jellyfin's metadata refresher (each one waits up to 15s
+// for DateLastRefreshed to advance). Returns immediately with the count;
+// each individual handoff emits a plan_update SSE so the UI promotes ✓ → ✓✓
+// (or flips back to Review on disagreement) as it lands.
+app.post("/verify-unverified", (c) => {
+	const db = getDb();
+	const rows = db
+		.prepare(`
+			SELECT mi.id as item_id FROM review_plans rp
+			JOIN media_items mi ON mi.id = rp.item_id
+			WHERE rp.status = 'done' AND rp.verified = 0
+			ORDER BY rp.reviewed_at DESC NULLS LAST
+		`)
+		.all() as { item_id: number }[];
+
+	if (rows.length === 0) return c.json({ ok: true, count: 0 });
+
+	(async () => {
+		for (const row of rows) {
+			try {
+				await handOffToJellyfin(row.item_id);
+			} catch (err) {
+				warn(`verify-unverified: handoff for item ${row.item_id} threw: ${String(err)}`);
+			}
+		}
+		log(`verify-unverified: processed ${rows.length} unverified done plan(s)`);
+	})();
+
+	return c.json({ ok: true, count: rows.length });
+});
+
 // ─── Stop running job ─────────────────────────────────────────────────────────
 
 app.post("/stop", (c) => {