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/network/build.gradle.kts

@@ -1,3 +1,7 @@
+@file:OptIn(ExperimentalWasmDsl::class)
+
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+
 plugins {
   alias(libs.plugins.kotlinMultiplatform)
   alias(libs.plugins.kotlinSerialization)
@@ -5,13 +9,11 @@ plugins {
 
 kotlin {
   jvm()
-  js {
-    binaries.library()
-    browser {
-      testTask {
-        enabled = false
-      }
-    }
+  js(IR) {
+    browser()
+  }
+  wasmJs {
+    browser()
   }
 
   sourceSets {
@@ -38,6 +40,12 @@ kotlin {
       implementation(libs.jmdns)
     }
 
+    wasmJsMain.dependencies {
+      implementation(libs.kotlin.stdlib.wasm.js)
+      implementation(libs.ktor.client.js)
+      implementation(libs.kotlinx.coroutines.core)
+    }
+
     jsMain.dependencies {
       implementation(libs.ktor.client.js)
     }