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/mobile/package.json

@@ -9,7 +9,10 @@
     "ios": "expo run:ios",
     "web": "expo start --web",
     "lint": "expo lint",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:ci": "jest --runInBand --ci"
   },
   "dependencies": {
     "@expo/ngrok": "^4.1.0",
@@ -61,7 +64,14 @@
   },
   "devDependencies": {
     "@babel/core": "^7.24.0",
+    "@testing-library/jest-native": "^5.4.3",
+    "@testing-library/react-native": "^13.3.3",
+    "@types/jest": "^30.0.0",
     "@types/react": "~18.3.12",
+    "@types/react-test-renderer": "^19.1.0",
+    "jest": "^29.7.0",
+    "jest-expo": "~52.0.0",
+    "react-test-renderer": "^18.3.1",
     "typescript": "^5.3.3"
   }
 }