Add React Native mobile app for Makima (#3)

* [WIP] Heartbeat checkpoint - 2026-01-18 02:58:27 UTC

* feat(mobile): complete mobile app integration and verification

- Add ThemeColors type export to Colors.ts for type safety
- Export SUPABASE_URL from supabase.ts and use environment variables
- Update .env.example with correct default URLs
- Add comprehensive README.md with setup instructions

Verified:
- TypeScript compiles without errors
- App exports successfully for iOS and Android
- All screens accessible (login, dashboard, tasks, settings, task detail)
- Auth flow working with Zustand store and Supabase

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

* Task completion checkpoint

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/apps/mobile/app.json b/apps/mobile/app.json
new file mode 100644
index 0000000..c7f558e
--- /dev/null
+++ b/apps/mobile/app.json
@@ -0,0 +1,43 @@
+{
+  "expo": {
+    "name": "Makima",
+    "slug": "makima-mobile",
+    "version": "1.0.0",
+    "orientation": "portrait",
+    "icon": "./assets/icon.png",
+    "scheme": "makima",
+    "userInterfaceStyle": "automatic",
+    "splash": {
+      "image": "./assets/splash.png",
+      "resizeMode": "contain",
+      "backgroundColor": "#ffffff"
+    },
+    "assetBundlePatterns": [
+      "**/*"
+    ],
+    "ios": {
+      "supportsTablet": true,
+      "bundleIdentifier": "jp.makima.mobile"
+    },
+    "android": {
+      "adaptiveIcon": {
+        "foregroundImage": "./assets/adaptive-icon.png",
+        "backgroundColor": "#ffffff"
+      },
+      "package": "jp.makima.mobile"
+    },
+    "web": {
+      "bundler": "metro",
+      "output": "static",
+      "favicon": "./assets/favicon.png"
+    },
+    "plugins": [
+      "expo-router",
+      "expo-secure-store",
+      "expo-font"
+    ],
+    "experiments": {
+      "typedRoutes": true
+    }
+  }
+}