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.

package.json

@@ -27,8 +27,8 @@
     "auto-run:android": "./scripts/auto-run.sh --platform=android",
     "auto-run:electron": "./scripts/auto-run.sh --platform=electron",
     "build:capacitor": "VITE_GIT_HASH=`git log -1 --pretty=format:%h` vite build --mode capacitor --config vite.config.capacitor.mts",
-    "build:capacitor:sync": "npm run build:capacitor && npx cap sync",
-    "build:native": "vite build && npx cap sync && npx capacitor-assets generate",
+    "build:capacitor:sync": "npm run build:capacitor && npx cap sync && node scripts/restore-local-plugins.js",
+    "build:native": "vite build && npx cap sync && node scripts/restore-local-plugins.js && npx capacitor-assets generate",
     "assets:config": "npx tsx scripts/assets-config.ts",
     "assets:validate": "npx tsx scripts/assets-validator.ts",
     "assets:validate:android": "./scripts/build-android.sh --assets-only",