Fix Android image share workflow and add local plugin persistence

- Add SafeArea and SharedImage plugins to capacitor.plugins.json
- Create restore-local-plugins.js to persist plugins after cap sync
- Integrate plugin restoration into build scripts
- Improve Android share intent timing with retry logic
- Clean up debug logging while keeping essential error handling
- Add documentation for local plugin management

Fixes issue where SharedImage plugin wasn't recognized, causing
"UNIMPLEMENTED" errors. Image sharing now works correctly on Android.

scripts/README-restore-local-plugins.md

@@ -0,0 +1,60 @@
+# Restore Local Capacitor Plugins
+
+## Overview
+
+The `restore-local-plugins.js` script ensures that local custom Capacitor plugins (`SafeArea` and `SharedImage`) are automatically restored to `android/app/src/main/assets/capacitor.plugins.json` after running `npx cap sync android`.
+
+## Why This Is Needed
+
+The `capacitor.plugins.json` file is auto-generated by Capacitor during `npx cap sync` and gets overwritten, removing any manually added local plugins. This script automatically restores them.
+
+## Usage
+
+### Automatic (Recommended)
+
+The script is automatically run by:
+- `./scripts/build-android.sh` (after `cap sync`)
+- `npm run build:capacitor:sync`
+- `npm run build:native`
+
+### Manual
+
+If you run `npx cap sync android` directly, you can restore plugins manually:
+
+```bash
+node scripts/restore-local-plugins.js
+```
+
+## What It Does
+
+1. Reads `android/app/src/main/assets/capacitor.plugins.json`
+2. Checks if local plugins (`SafeArea` and `SharedImage`) are present
+3. Adds any missing local plugins
+4. Preserves the existing JSON format
+
+## Local Plugins
+
+The following local plugins are automatically restored:
+
+- **SafeArea**: `app.timesafari.safearea.SafeAreaPlugin`
+- **SharedImage**: `app.timesafari.sharedimage.SharedImagePlugin`
+
+## Adding New Local Plugins
+
+To add a new local plugin, edit `scripts/restore-local-plugins.js` and add it to the `LOCAL_PLUGINS` array:
+
+```javascript
+const LOCAL_PLUGINS = [
+  // ... existing plugins ...
+  {
+    pkg: 'YourPluginName',
+    classpath: 'app.timesafari.yourpackage.YourPluginClass'
+  }
+];
+```
+
+## Notes
+
+- The script is idempotent - running it multiple times won't create duplicates
+- The script preserves the existing JSON formatting (tabs, etc.)
+- If the plugins file doesn't exist, the script will exit with an error (run `npx cap sync android` first)