fix(ft8): restore Look4Sat Pro label/icon, add AppCompat theme

User reported the app installed as "FT8CN" with the FT8CN icon and
FT8 not opening. Root causes (verified by aapt badging on the release
APK):
1. module values/strings.xml carried <string name="app_name">FT8CN
   which won the resource merge -> application-label became FT8CN.
   Removed it; dialogs that referenced R.string.app_name now use a
   module-local ft8cn_app_name (HelpDialog/ClearCacheDataDialog).
2. module shipped its own mipmap ic_launcher* (8 files) which
   overrode our launcher icon -> deleted all of them.
3. MainActivity extends AppCompatActivity but the module's
   <application> lost android:theme when the conflicting attributes
   were stripped -> startup crash. Re-added android:theme=Theme.Ft8CN
   (MaterialComponents) on the module application element.
Verified: processReleaseManifest/Resources + ft8 javac + app kotlin
BUILD SUCCESSFUL. Plan: .hermes/plans/2026-08-05_150000-v455-fix-plan.md

feature/ft8/src/main/AndroidManifest.xml

@@ -19,7 +19,7 @@
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
 
-    <application>
+    <application android:theme="@style/Theme.Ft8CN">
         <activity
             android:name=".grid_tracker.GridTrackerMainActivity"
             android:screenOrientation="sensorLandscape"

feature/ft8/src/main/java/com/bg7yoz/ft8cn/ui/ClearCacheDataDialog.java

@@ -90,7 +90,7 @@ public class ClearCacheDataDialog extends Dialog {
         scrollView = (ScrollView) findViewById(R.id.helpScrollView);
         upImageView.setVisibility(View.INVISIBLE);
         downImageView.setVisibility(View.INVISIBLE);
-        appNameTextView.setText(GeneralVariables.getStringFromResource(R.string.app_name));
+        appNameTextView.setText(GeneralVariables.getStringFromResource(R.string.ft8cn_app_name));
         buildVersionTextView.setText(BuildConfig.VERSION_NAME);
 
         Button cancelButton=(Button) findViewById(R.id.cancelClearButton);

feature/ft8/src/main/java/com/bg7yoz/ft8cn/ui/HelpDialog.java

@@ -89,7 +89,7 @@ public class HelpDialog extends Dialog {
         scrollView = (ScrollView) findViewById(R.id.helpScrollView);
         upImageView.setVisibility(View.INVISIBLE);
         downImageView.setVisibility(View.INVISIBLE);
-        appNameTextView.setText(GeneralVariables.getStringFromResource(R.string.app_name));
+        appNameTextView.setText(GeneralVariables.getStringFromResource(R.string.ft8cn_app_name));
         buildVersionTextView.setText(BuildConfig.VERSION_NAME);
 
         scrollView.setOnScrollChangeListener(new View.OnScrollChangeListener() {

feature/ft8/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

feature/ft8/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
-</adaptive-icon>

feature/ft8/src/main/res/values/strings.xml

@@ -1,5 +1,5 @@
 <resources>
-    <string name="app_name">FT8CN</string>
+    <string name="ft8cn_app_name">FT8CN</string>
     <string name="nav_menu_title_call_list">Content</string>
     <string name="nav_menu_title_decode_list">Decode</string>
     <string name="nav_menu_title_my_calling">Calling</string>