feat: add weekly summary notifications

Adds Sunday weekly recap push notifications summarizing couple match
activity. Includes edge function, migration, notification preference
toggle, and mobile notification handling.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/supabase/migrations/20260131214924_add_weekly_summary_notification.sql

@@ -0,0 +1,16 @@
+-- Add weekly_summary_enabled to notification_preferences
+ALTER TABLE notification_preferences
+ADD COLUMN IF NOT EXISTS weekly_summary_enabled BOOLEAN DEFAULT true;
+
+-- Schedule weekly summary notification: Sunday 10:00 UTC
+SELECT cron.schedule(
+    'send-weekly-summary',
+    '0 10 * * 0',
+    $$
+    SELECT net.http_post(
+        url := 'https://ckjcrkjpmhqhiucifukx.supabase.co/functions/v1/send-weekly-summary',
+        headers := jsonb_build_object('Content-Type', 'application/json'),
+        body := '{}'::jsonb
+    )
+    $$
+);