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

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

frontend/core/auth/build.gradle.kts

@@ -10,13 +10,11 @@ version = "1.0.0"
 
 kotlin {
   jvm()
-  js {
-    binaries.library()
-    browser {
-      testTask {
-        enabled = false
-      }
-    }
+  js(IR) {
+    browser()
+  }
+  wasmJs {
+    browser()
   }
 
   sourceSets {
@@ -63,6 +61,11 @@ kotlin {
       implementation(libs.ktor.client.cio)
     }
 
+    wasmJsMain.dependencies {
+      implementation("org.jetbrains.kotlin:kotlin-stdlib-wasm-js:2.3.20")
+      implementation(libs.ktor.client.js)
+    }
+
     jsMain.dependencies {
       implementation(libs.ktor.client.js)
     }