pipeline: uniform column headers, auto-process queue toggle, reopen → inbox

column headers are now a fixed three-row layout (title / subtitle / button
row). every column always reserves all three rows so headers line up
regardless of contents; actions render disabled when their column is
empty instead of disappearing, which keeps the header height stable as
state changes.

the processing column gets a new "Auto-process Queue" checkbox that
mirrors the inbox's "Auto-process Inbox" toggle. backend adds an
auto_process_queue config, a maybeStartQueueProcessor() helper, a
POST /api/settings/auto-process-queue endpoint, and a hook in
enqueueAudioJob so approvals drain the queue hands-off when the toggle
is on.

reopen-all and per-item reopen now send items to the Inbox (sorted=0)
instead of back to Review. the done column's label and tooltip become
"← Back to inbox" to match, and the clear button moves to the right
slot so the header pattern (left=backward, right=forward) stays
consistent across columns.

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

server/api/settings.ts

@@ -137,6 +137,24 @@ app.post("/auto-processing", async (c) => {
 	return c.json({ ok: true, enabled: false });
 });
 
+// Toggle the auto-process-queue flag. When flipped on, kick the queue
+// processor so any already-pending jobs start draining immediately without
+// waiting for the next approval to trigger it.
+app.post("/auto-process-queue", async (c) => {
+	const body = await c.req.json<{ enabled?: unknown }>().catch(() => ({ enabled: null }));
+	if (typeof body.enabled !== "boolean") {
+		return c.json({ ok: false, error: "enabled must be a boolean" }, 400);
+	}
+	setConfig("auto_process_queue", body.enabled ? "1" : "0");
+
+	if (body.enabled) {
+		const { maybeStartQueueProcessor } = await import("./execute");
+		const started = maybeStartQueueProcessor();
+		return c.json({ ok: true, enabled: true, started });
+	}
+	return c.json({ ok: true, enabled: false });
+});
+
 app.get("/schedule", (c) => {
 	return c.json(getScheduleConfig());
 });