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/db/schema.sql

@@ -348,14 +348,17 @@ CREATE TABLE IF NOT EXISTS reports (
   generated_at TEXT NOT NULL
 );
 
+-- ===== Alert subscriptions (user-defined rules for which alerts to receive) =====
 CREATE TABLE IF NOT EXISTS alerts (
-  id         TEXT PRIMARY KEY,
-  owner_id   TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
-  symbol     TEXT,
-  alert_type TEXT NOT NULL,               -- informed_buy|informed_sell|new_13da|rotation_incipient|regime_shift|conviction_unlock|...
-  params     TEXT NOT NULL,               -- JSON thresholds
-  last_fired TEXT,
-  created_at TEXT NOT NULL
+  id            TEXT PRIMARY KEY,
+  owner_id      TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  watchlist_id  TEXT,                        -- NULL = global default, non-NULL = list-level
+  symbol        TEXT,                        -- NULL = list-level, non-NULL = ticker-level
+  alert_type    TEXT NOT NULL,               -- informed_buy|informed_sell|new_13da|rotation_incipient|regime_shift|conviction_unlock|...
+  enabled       INTEGER NOT NULL DEFAULT 1,
+  params        TEXT NOT NULL DEFAULT '{}',  -- JSON thresholds
+  last_fired    TEXT,
+  created_at    TEXT NOT NULL
 );
 
 CREATE TABLE IF NOT EXISTS trusted_accounts (
@@ -566,6 +569,29 @@ CREATE INDEX IF NOT EXISTS idx_alert_events_user ON alert_events(user_id, create
 CREATE INDEX IF NOT EXISTS idx_alert_events_dedup ON alert_events(dedup_key);
 CREATE INDEX IF NOT EXISTS idx_alert_events_throttle ON alert_events(throttle_key);
 
+-- ===== Alert comparison state (post-fetch change detection) =====
+CREATE TABLE IF NOT EXISTS alert_comparison_state (
+  symbol      TEXT NOT NULL,
+  alert_type  TEXT NOT NULL,
+  state       TEXT NOT NULL DEFAULT '{}',  -- JSON snapshot
+  updated_at  TEXT NOT NULL,
+  PRIMARY KEY (symbol, alert_type)
+);
+
+-- ===== SMTP config for email alerts =====
+CREATE TABLE IF NOT EXISTS smtp_config (
+  id          TEXT PRIMARY KEY DEFAULT 'singleton',
+  host        TEXT NOT NULL DEFAULT 'smtp.mail.me.com',
+  port        INTEGER NOT NULL DEFAULT 587,
+  secure      INTEGER NOT NULL DEFAULT 0,
+  user        TEXT,
+  pass_enc    TEXT,
+  from_name   TEXT NOT NULL DEFAULT 'Investor Flow',
+  from_email  TEXT NOT NULL DEFAULT '',
+  enabled     INTEGER NOT NULL DEFAULT 0,
+  updated_at  TEXT NOT NULL
+);
+
 -- ===== Slice 12 — Strategy Lab + Backtest =====
 CREATE TABLE IF NOT EXISTS strategies (
   id          TEXT PRIMARY KEY,