Update .gitignore to exclude Android/Gradle files and enhance TimeEntryController and TimefixService for better error handling and performance. Refactor frontend components to use AppBrand for consistent branding across views.

.gitignore

@@ -46,6 +46,12 @@ tmp/
 temp/
 *.tmp
 
+# Android / Gradle
+.gradle/
+*/.gradle/
+local.properties
+*/local.properties
+
 # SQL scripts (optional - nur wenn sie sensible Daten enthalten)
 # backend/*.sql