stream auto review progress over SSE so large inboxes don't feel frozen

sortInbox is now async, yields every 10 items, and emits inbox_sort_start
+ inbox_sort_progress via optional hooks. the pipeline route handler
wires those hooks to the existing job events stream and guards against
a second concurrent sort with a 409.

the inbox column swaps its Auto Review button for a live "Sorting N/T"
counter and progress bar while the sort is in flight; the auto-process
toggle hides to give the progress the full subtitle line. the previous
behaviour was a frozen button for the entire duration of the sort.

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

server/api/scan.ts

@@ -419,8 +419,11 @@ async function runScan(limit: number | null = null): Promise<void> {
 
 	if (getConfig("auto_processing") === "1") {
 		const { sortInbox, getAudioLanguages } = await import("./review");
-		const { emitInboxSorted } = await import("./execute");
-		const result = sortInbox(db, getAudioLanguages());
+		const { emitInboxSorted, emitInboxSortStart, emitInboxSortProgress } = await import("./execute");
+		const result = await sortInbox(db, getAudioLanguages(), {
+			onStart: emitInboxSortStart,
+			onProgress: emitInboxSortProgress,
+		});
 		emitInboxSorted(result);
 	}
 }