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/app/src/main/java/ai/hesychia/chat/MainActivity.java

@@ -1,4 +1,4 @@
-package com.aimloperations.chat;
+package ai.hesychia.chat;
 
 import com.getcapacitor.BridgeActivity;
 

llm-fe/android/app/src/main/res/values/strings.xml

@@ -2,6 +2,6 @@
 <resources>
     <string name="app_name">Hesychia</string>
     <string name="title_activity_main">Hesychia</string>
-    <string name="package_name">com.aimloperations.chat</string>
-    <string name="custom_url_scheme">com.aimloperations.chat</string>
+    <string name="package_name">ai.hesychia.chat</string>
+    <string name="custom_url_scheme">ai.hesychia.chat</string>
 </resources>