Rename Android application ID to ai.hesychia.chat (#68)

## Summary
- Closes #67
- Renames Android/Capacitor identity from `com.aimloperations.chat` → `ai.hesychia.chat`
- Updates `appId`, Gradle `applicationId`/`namespace`, `MainActivity` package path, `strings.xml` scheme, and Android README

## Notes
- New application ID installs as a separate app beside any old-ID install (expected for early builds).
- App already built and run on a physical device with this identity work in progress.

## Test plan
- [ ] `npx cap sync android` after web build
- [ ] Debug install on device — package shows `ai.hesychia.chat`
- [ ] App launches and reaches login / chat
- [ ] Confirm old `com.aimloperations.chat` install (if present) is separate and can be uninstalledReviewed-on: #68

llm-fe/android/README.md

@@ -1,6 +1,6 @@
 # Hesychia — Android
 
-Native Capacitor project for `com.aimloperations.chat`. Web UI comes from the CRA
+Native Capacitor project for `ai.hesychia.chat`. Web UI comes from the CRA
 `build/` output in the parent `llm-fe/` package (synced with `npx cap sync`).
 
 Broader Capacitor notes (env files, icons, QA): [`../ANDROID.md`](../ANDROID.md).
@@ -105,7 +105,7 @@ Without `keystore.properties`, release builds are unsigned; debug builds do not
 
 ## Deploy to Google Play
 
-1. [Play Console](https://play.google.com/console) → app **Hesychia** (`com.aimloperations.chat`).
+1. [Play Console](https://play.google.com/console) → app **Hesychia** (`ai.hesychia.chat`).
 2. Complete store listing: privacy policy URL, data-safety form, screenshots.
 3. **Testing → Internal testing** → create release → upload `app-release.aab`.
 4. Add testers, roll out internal track, verify on devices.
@@ -126,6 +126,6 @@ Each new upload needs a higher `versionCode`.
 
 | | |
 |--|--|
-| Application ID | `com.aimloperations.chat` |
+| Application ID | `ai.hesychia.chat` |
 | Display name | Hesychia |
 | Min / target SDK | 23 / 35 (see `variables.gradle`) |