build(metro): add web shims for native React Native API compatibility

Add Metro configuration to resolve native-only React Native APIs with web-compatible shims. This enables packages like react-native-pager-view to work on the web platform by providing shim implementations for codegenNativeComponent, codegenNativeCommands, and CodegenTypes that are unavailable in react-native-web.

Also simplify Android signing configuration in CI by using standard Gradle property names (MYAPP_UPLOAD_*) and remove the build.gradle patching step.

.gitea/workflows/build.yml

@@ -154,29 +154,6 @@ jobs:
         run: |
           echo "${{ secrets.ANDROID_KEYSTORE_BASE64 }}" | base64 -d > android/app/withyou-release-key.keystore
 
-      - name: Patch app/build.gradle with signing config
-        run: |
-          cd android/app
-          python3 -c "
-          import re
-          with open('build.gradle', 'r') as f:
-              content = f.read()
-          release_signing = '''
-              signingConfigs {
-                  release {
-                      storeFile file(WITHYOU_UPLOAD_STORE_FILE)
-                      storePassword WITHYOU_UPLOAD_STORE_PASSWORD
-                      keyAlias WITHYOU_UPLOAD_KEY_ALIAS
-                      keyPassword WITHYOU_UPLOAD_KEY_PASSWORD
-                  }
-              }
-          '''
-          content = content.replace('signingConfigs {}', release_signing)
-          content = content.replace('signingConfig signingConfigs.debug', 'signingConfig signingConfigs.release')
-          with open('build.gradle', 'w') as f:
-              f.write(content)
-          "
-
       - name: Configure Gradle with Aliyun Maven mirror
         run: |
           cd android
@@ -291,10 +268,10 @@ jobs:
         run: |
           cd android
           cat >> gradle.properties << SIGNING_PROPS
-          WITHYOU_UPLOAD_STORE_FILE=withyou-release-key.keystore
-          WITHYOU_UPLOAD_STORE_PASSWORD=${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
-          WITHYOU_UPLOAD_KEY_ALIAS=withyou-key
-          WITHYOU_UPLOAD_KEY_PASSWORD=${{ secrets.ANDROID_KEY_PASSWORD }}
+          MYAPP_UPLOAD_STORE_FILE=withyou-release-key.keystore
+          MYAPP_UPLOAD_STORE_PASSWORD=${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          MYAPP_UPLOAD_KEY_ALIAS=withyou-key
+          MYAPP_UPLOAD_KEY_PASSWORD=${{ secrets.ANDROID_KEY_PASSWORD }}
           SIGNING_PROPS
 
       - name: Build Android release APK (arm64 only)