feat: tasks app, security hardening, mobile fixes, iOS app shell

- Custom SQLite task manager replacing TickTick wrapper
- 73 tasks migrated from TickTick across 15 projects
- RRULE recurrence engine with lazy materialization
- Dashboard tasks widget (desktop sidebar + mobile card)
- Tasks page with project tabs, add/edit/complete/delete
- Security: locked ports to localhost, removed old containers
- Gitea Actions runner configured and all 3 CI jobs passing
- Fixed mobile overflow on dashboard cards
- iOS Capacitor app shell (Second Brain)
- Frontend/backend guide docs for adding new services
- TickTick Google Calendar sync re-authorized

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

gateway/database.py

@@ -8,7 +8,7 @@ import bcrypt
 
 from config import (
     DB_PATH, TRIPS_URL, FITNESS_URL, INVENTORY_URL,
-    MINIFLUX_URL, SHELFMARK_URL, SPOTIZERR_URL, BUDGET_URL,
+    MINIFLUX_URL, SHELFMARK_URL, SPOTIZERR_URL, BUDGET_URL, TASKS_URL,
 )
 
 
@@ -122,6 +122,13 @@ def init_db():
         conn.commit()
         print("[Gateway] Added budget app")
 
+    # Ensure tasks app exists
+    tasks = c.execute("SELECT id FROM apps WHERE id = 'tasks'").fetchone()
+    if not tasks:
+        c.execute("INSERT INTO apps VALUES ('tasks', 'Tasks', 'check-square', '/tasks', ?, 8, 1, 'today_tasks')", (TASKS_URL,))
+        conn.commit()
+        print("[Gateway] Added tasks app")
+
     # Seed admin user from env vars if no users exist
     import os
     user_count = c.execute("SELECT COUNT(*) FROM users").fetchone()[0]