add app icon, fix manifest icon refs, server logs token on every startup

- mipmap-* and drawable/ icon resources from Image Asset tool
- ic_launcher_background.xml: solid #22569d (matches foreground design)
- AndroidManifest.xml: add android:icon and android:roundIcon attributes
- server/app/main.py: log token on every startup (not just first run)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

android/app/src/main/AndroidManifest.xml

@@ -9,8 +9,9 @@
         android:theme="@style/Theme.Synq"
         android:allowBackup="true"
         android:supportsRtl="true"
-        android:usesCleartextTraffic="true">
-
+        android:usesCleartextTraffic="true"
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher_round">
         <activity
             android:name=".MainActivity"
             android:exported="true"