Fix bugs, add auto-refresh, quick-complete tasks, and every-N-day routines

- Fix bot auth: merge duplicate on_ready handlers so session restore runs (#13)
- Fix push notifications: pass Uint8Array directly as applicationServerKey (#6)
- Show specific conflict reason on schedule save instead of generic error (#17)
- Add inline checkmark button to complete tasks on routines timeline (#18)
- Add visibility-change + 60s polling auto-refresh to routines, meds, tasks (#15)
- Add every-N-day routine scheduling: schema, API, scheduler, and UI (#16)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config/schema.sql

@@ -74,7 +74,10 @@ CREATE TABLE IF NOT EXISTS routine_schedules (
     routine_id UUID REFERENCES routines(id) ON DELETE CASCADE,
     days JSON DEFAULT '[]',
     time VARCHAR(5),
-    remind BOOLEAN DEFAULT FALSE
+    remind BOOLEAN DEFAULT FALSE,
+    frequency VARCHAR(20) DEFAULT 'weekly',
+    interval_days INTEGER,
+    start_date DATE
 );
 
 CREATE TABLE IF NOT EXISTS routine_session_notes (
@@ -314,3 +317,8 @@ CREATE TABLE IF NOT EXISTS tasks (
 );
 CREATE INDEX IF NOT EXISTS idx_tasks_user_scheduled ON tasks(user_uuid, scheduled_datetime);
 CREATE INDEX IF NOT EXISTS idx_tasks_pending ON tasks(status) WHERE status = 'pending';
+
+-- Add every-N-day scheduling to routine_schedules (run once on existing DBs)
+ALTER TABLE routine_schedules ADD COLUMN IF NOT EXISTS frequency VARCHAR(20) DEFAULT 'weekly';
+ALTER TABLE routine_schedules ADD COLUMN IF NOT EXISTS interval_days INTEGER;
+ALTER TABLE routine_schedules ADD COLUMN IF NOT EXISTS start_date DATE;