Phase 5: alert subscriptions UI + multiple watchlists + queue fixes

UI:
- /alerts page: event history with acknowledge, subscription create/manage with toggle
- /admin/smtp: SMTP config form (host, port, auth, test)
- Watchlist sidebar: dropdown selector for multiple watchlists, create/delete
- Sidebar: alerts count badge, SMTP link under admin
- Mobile tab nav: alerts tab added
- Client trpc.ts: all new API methods + types

Backend:
- watchlists.listByWatchlist procedure + listSymbolsByWatchlist repo fn
- yfinance min-interval 1500->2000ms to reduce Edge 429s
- Fixed e.date.slice error in yfinance-adjustments with typeof guard
- Removed defunct BITF from watchlist+queue
- Cleared 83 failed + 12 backoff queue jobs

Docs:
- FUNCTIONAL_DESIGN.md: alerts + multiple watchlists + SMTP documented
- TECH_DESIGN.md: new modules, tRPC procs, routes updated

app/server/src/index.ts

@@ -66,6 +66,46 @@ const SCHEDULE_MS = 30_000;
 const scheduleTimer = setInterval(() => { queue.enqueueDueSchedules().catch((e) => console.error('[schedule error]', e)); }, SCHEDULE_MS);
 scheduleTimer.unref();
 
+// Per-fetch alert check: run alongside the schedule cycle for critical alert types.
+const perFetchAlertTimer = setInterval(async () => {
+  try {
+    const alerts = await runProducers(database, 'per-fetch');
+    if (alerts.length > 0) {
+      console.log(`[alert] ${alerts.length} per-fetch alert(s) created`);
+      const { sendAlertEmail } = await import('./services/emailAlertService.ts');
+      alerts.forEach((a) => sendAlertEmail(database, a).catch(() => {}));
+    }
+  } catch (e) {
+    console.error('[alert] per-fetch check failed:', e);
+  }
+}, SCHEDULE_MS);
+perFetchAlertTimer.unref();
+
+// Register alert producers.
+import { registerProducer, runProducers } from './alerts/producers/index.ts';
+import { informedBuyProducer, informedSellProducer } from './alerts/producers/insiderProducer.ts';
+import { new13daProducer } from './alerts/producers/new13daProducer.ts';
+registerProducer(informedBuyProducer);
+registerProducer(informedSellProducer);
+registerProducer(new13daProducer);
+
+// Batched alert check: run every 10 minutes for non-critical producers.
+const ALERT_BATCH_MS = 10 * 60 * 1000;
+const alertBatchTimer = setInterval(async () => {
+  try {
+    const alerts = await runProducers(database, 'batched');
+    if (alerts.length > 0) console.log(`[alert] ${alerts.length} batch alert(s) created`);
+    // Send email for each new alert.
+    const { sendAlertEmail } = await import('./services/emailAlertService.ts');
+    for (const alert of alerts) {
+      sendAlertEmail(database, alert).catch((e) => console.error('[alert:email] send error:', e));
+    }
+  } catch (e) {
+    console.error('[alert] batch check failed:', e);
+  }
+}, ALERT_BATCH_MS);
+alertBatchTimer.unref();
+
 function readBody(req: IncomingMessage): Promise<string> {
   return new Promise((resolve, reject) => {
     let data = '';