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/src/lib/trpc.ts

@@ -103,6 +103,40 @@ export interface AlertEventRow {
   payload: Record<string, unknown>;
 }
 
+export interface AlertSubscriptionRow {
+  id: string;
+  owner_id: string;
+  watchlist_id: string | null;
+  symbol: string | null;
+  alert_type: string;
+  enabled: boolean;
+  params: string;
+  last_fired: string | null;
+  created_at: string;
+}
+
+export interface SmtpConfigRow {
+  host: string;
+  port: number;
+  secure: boolean;
+  user: string | null;
+  passEnc: string | null;
+  fromName: string;
+  fromEmail: string;
+  enabled: boolean;
+}
+
+export interface SmtpConfigUpdate {
+  host?: string;
+  port?: number;
+  secure?: boolean;
+  user?: string | null;
+  pass?: string | null;
+  fromName?: string;
+  fromEmail?: string;
+  enabled?: boolean;
+}
+
 export interface RotationData {
   sectors: SectorRotationItem[];
   signal: {
@@ -505,8 +539,16 @@ export const api = {
   },
   watchlists: {
     list: () => trpcQuery<WatchlistEntry[]>("watchlists.list"),
-    addSymbol: (symbol: string) => trpcMutate<{ added: boolean }>("watchlists.addSymbol", { symbol }),
-    removeSymbol: (symbol: string) => trpcMutate<{ removed: boolean }>("watchlists.removeSymbol", { symbol }),
+    listByWatchlist: (name: string) => trpcQuery<WatchlistEntry[]>("watchlists.listByWatchlist", { name }),
+    listWatchlists: () => trpcQuery<Array<{ id: string; name: string; symbol_count: number; sort_order: number; created_at: string }>>("watchlists.listWatchlists"),
+    create: (name: string) => trpcMutate<{ id: string; name: string; symbol_count: number; sort_order: number; created_at: string }>("watchlists.create", { name }),
+    delete: (name: string) => trpcMutate<{ deleted: boolean }>("watchlists.delete", { name }),
+    rename: (oldName: string, newName: string) => trpcMutate<{ renamed: boolean }>("watchlists.rename", { oldName, newName }),
+    reorder: (orders: { id: string; sort_order: number }[]) => trpcMutate<{ ok: boolean }>("watchlists.reorder", { orders }),
+    addSymbol: (symbol: string, watchlistName?: string, notes?: string) =>
+      trpcMutate<{ added: boolean }>("watchlists.addSymbol", { symbol, ...(watchlistName ? { watchlistName } : {}), ...(notes ? { notes } : {}) }),
+    removeSymbol: (symbol: string, watchlistName?: string) =>
+      trpcMutate<{ removed: boolean }>("watchlists.removeSymbol", { symbol, ...(watchlistName ? { watchlistName } : {}) }),
   },
   options: {
     chain: (symbol: string, opts?: { expiry?: string }) =>
@@ -581,6 +623,14 @@ export const api = {
     acknowledge: (alertId: string) => trpcMutate<{ ok: boolean }>("alerts.acknowledge", { alertId }),
     unackedCount: () => trpcQuery<{ count: number }>("alerts.unackedCount"),
     acknowledgeAll: () => trpcMutate<{ ok: boolean }>("alerts.acknowledgeAll", {}),
+    createSubscription: (input: { alertType: string; watchlistId?: string; symbol?: string; params?: string }) =>
+      trpcMutate<AlertSubscriptionRow>("alerts.createSubscription", input),
+    listSubscriptions: (symbol?: string) =>
+      trpcQuery<AlertSubscriptionRow[]>("alerts.listSubscriptions", symbol ? { symbol } : {}),
+    updateSubscription: (id: string, updates: { enabled?: boolean; params?: string }) =>
+      trpcMutate<AlertSubscriptionRow>("alerts.updateSubscription", { id, ...updates }),
+    deleteSubscription: (id: string) =>
+      trpcMutate<{ ok: boolean }>("alerts.deleteSubscription", { id }),
   },
   x: {
     cashtag_search: (symbol: string, limit = 30) => trpcQuery<{ posts: XPost[]; configured: boolean }>("x.cashtag_search", { symbol, limit }),
@@ -625,6 +675,10 @@ export const api = {
       trpcQuery<DataQualityRow[]>("admin.dataQualityList", input ?? {}),
     serverRestart: (target: 'backend' | 'frontend' | 'all' = 'all') =>
       trpcMutate<{ ok: boolean; backend: string; frontend: string }>("admin.serverRestart", { target }),
+    smtpConfig: () => trpcQuery<SmtpConfigRow>("admin.smtpConfig"),
+    smtpConfigUpdate: (input: SmtpConfigUpdate) =>
+      trpcMutate<{ ok: boolean }>("admin.smtpConfigUpdate", input),
+    smtpConfigTest: () => trpcMutate<{ ok: boolean }>("admin.smtpConfigTest", {}),
   },
 };