feat: add EAS build configuration for local APK builds

- Add eas.json with development, preview, and production profiles
- Configure preview profile for APK builds (arm64-v8a only)
- Add build:apk npm script for local builds
- Update app.json with app name and Android package
- Add expo-build-properties dependency
- Update CLAUDE.md with build documentation

apps/client/app.json

@@ -1,11 +1,10 @@
 {
   "expo": {
     "jsEngine": "hermes",
-    "name": "caldav",
+    "name": "CalChat",
     "slug": "caldav",
     "version": "1.0.0",
     "orientation": "portrait",
-    "icon": "./assets/images/icon.png",
     "scheme": "caldav",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": true,
@@ -13,38 +12,26 @@
       "supportsTablet": true
     },
     "android": {
-      "adaptiveIcon": {
-        "backgroundColor": "#E6F4FE",
-        "foregroundImage": "./assets/images/android-icon-foreground.png",
-        "backgroundImage": "./assets/images/android-icon-background.png",
-        "monochromeImage": "./assets/images/android-icon-monochrome.png"
-      },
+      "package": "com.gilmour109.calchat",
       "edgeToEdgeEnabled": true,
       "predictiveBackGestureEnabled": false
     },
     "web": {
       "output": "static",
-      "favicon": "./assets/images/favicon.png",
       "bundler": "metro"
     },
     "plugins": [
-      "expo-router",
-      [
-        "expo-splash-screen",
-        {
-          "image": "./assets/images/splash-icon.png",
-          "imageWidth": 200,
-          "resizeMode": "contain",
-          "backgroundColor": "#ffffff",
-          "dark": {
-            "backgroundColor": "#000000"
-          }
-        }
-      ]
+      "expo-router"
     ],
     "experiments": {
       "typedRoutes": true,
       "reactCompiler": true
+    },
+    "extra": {
+      "router": {},
+      "eas": {
+        "projectId": "b722dde6-7d89-48ff-9095-e007e7c7da87"
+      }
     }
   }
 }