chore(turnier-feature): remove unused ViewModels and UI components

- Removed `AbteilungViewModel`, `BewerbAnlegenViewModel`, `BewerbViewModel`, and `CreateBewerbWizardScreen`.
- Cleaned up related imports and unused domain models.

frontend/shells/meldestelle-desktop/build.gradle.kts

@@ -21,7 +21,7 @@ plugins {
   alias(libs.plugins.composeCompiler)
   alias(libs.plugins.composeMultiplatform)
   alias(libs.plugins.kotlinSerialization)
-  id("org.jetbrains.compose.hot-reload")
+  // id("org.jetbrains.compose.hot-reload")
 }
 
 // ---------------------------------------------------------------
@@ -30,9 +30,9 @@ plugins {
 val versionProps = Properties().also { props ->
   rootProject.file("version.properties").inputStream().use { props.load(it) }
 }
-val vMajor = versionProps.getProperty("VERSION_MAJOR", "1")
-val vMinor = versionProps.getProperty("VERSION_MINOR", "0")
-val vPatch = versionProps.getProperty("VERSION_PATCH", "0")
+val vMajor: String? = versionProps.getProperty("VERSION_MAJOR", "1")
+val vMinor: String? = versionProps.getProperty("VERSION_MINOR", "0")
+val vPatch: String? = versionProps.getProperty("VERSION_PATCH", "0")
 // nativeDistributions erwartet reines "MAJOR.MINOR.PATCH" (kein Qualifier)
 val packageVer = "$vMajor.$vMinor.$vPatch"