feat(android): replace WebView with tested native Compose API slice

Add real native onboarding/auth/dashboard/tasks/notes/shopping, origin-bound HTTPS and encrypted AndroidKeyStore session persistence. Archive the superseded browser renderer and tests. Verify 10 JVM tests, 6 native API-35 emulator tests, lintDebug/lintRelease and debug/unsigned release APK/AAB builds; the real upstream suite passes 7 tests and exports a nonblank native fixture screenshot. Tink host-tool update removes the old generated-protobuf warning. Full module/visual parity remains explicitly incomplete.

legacy/android/strings.xml

@@ -0,0 +1,5 @@
+<resources>
+    <string name="app_name">Yuvomi Mobile</string>
+    <string name="checking_server">Checking your server…</string>
+    <string name="probe_failed">Cannot verify a compatible Yuvomi server. Check the URL, TLS certificate, VPN, and reverse-proxy access.</string>
+</resources>