fix: improve crash reporting on Codeberg

- Pre-fill Codeberg issue with crash details (title and body).
- Remove unreliable canLaunchUrl check.
- Add SnackBar error handling if launch fails.
- Add https intent to Android queries manifest for better link visibility.
- Add widget test for CrashScreen.

android/app/src/main/AndroidManifest.xml

@@ -38,6 +38,10 @@
 
          In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
     <queries>
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="https" />
+        </intent>
         <intent>
             <action android:name="android.intent.action.PROCESS_TEXT"/>
             <data android:mimeType="text/plain"/>