chore(mobile): bump to 1.0.1 (versionCode 2) for the next Play Store build

Play Console requires a strictly increasing versionCode per upload —
the approved submission used versionCode 1. This release bundles the
sign-up fix, dark mode fixes, video-loop fix, and the pet edit/avatar
improvements from the last two commits.

mobile/app.json

@@ -3,7 +3,7 @@
     "name": "PawFeed",
     "slug": "pawfeed-mobile",
     "scheme": "pawfeed",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "orientation": "portrait",
     "icon": "./assets/icon.png",
     "userInterfaceStyle": "automatic",
@@ -13,7 +13,7 @@
     },
     "android": {
       "package": "org.pawfeed.app",
-      "versionCode": 1,
+      "versionCode": 2,
       "googleServicesFile": "./google-services.json",
       "adaptiveIcon": {
         "backgroundColor": "#fafafa",