Add feature opt-ins, dashboard view, and tests

Introduce feature_interests schema + realtime publication and surface opt-in trends in the admin dashboard. Add Jest test infrastructure/coverage for the mobile app and update push-all to run mobile checks before pushing.

Co-authored-by: Claude Code <claude@anthropic.com>

apps/supabase/migrations/20260102000000_add_feature_interests_admin_rls.sql

@@ -0,0 +1,5 @@
+-- Allow admins to view all feature interest opt-ins
+
+CREATE POLICY "Admins with view_users permission can view all feature interests"
+  ON feature_interests FOR SELECT
+  USING (has_permission('view_users'));