fix(web-app): remove unused sqlite.worker.js and wasi-dummy.js, update Config.kt and service worker logic

- Deleted `sqlite.worker.js` and `wasi-dummy.js` to clean up outdated resources.
- Updated `Config.kt` to use a shared `Json` instance for deserialization.
- Revised service worker for cache versioning and to bypass caching of `web-app.js` and `.map` files.
- Enhanced debug logging and improved handling of uncaught errors in new `sqlite.worker.js`.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

frontend/shells/meldestelle-portal/src/jsMain/kotlin/Config.kt

@@ -3,6 +3,8 @@ import kotlinx.coroutines.await
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 
+private val AppJson = Json { ignoreUnknownKeys = true }
+
 @Serializable
 data class AppConfig(
   val apiBaseUrl: String,
@@ -18,7 +20,7 @@ suspend fun loadAppConfig(): AppConfig {
             return fallbackFromGlobal()
         }
         val text = response.text().await()
-        Json.decodeFromString(AppConfig.serializer(), text)
+      AppJson.decodeFromString(AppConfig.serializer(), text)
     } catch (e: dynamic) {
         console.error("[Config] Error loading config:", e)
         // Fallback: Caddy-injizierte Werte aus index.html (globalThis.API_BASE_URL / KEYCLOAK_URL)
@@ -28,10 +30,10 @@ suspend fun loadAppConfig(): AppConfig {
 
 private fun fallbackFromGlobal(): AppConfig {
     val apiBase = (js("globalThis.API_BASE_URL") as? String)
-        ?.takeIf { it.isNotBlank() && !it.startsWith("\${") }
+      ?.takeIf { it.isNotBlank() && !it.startsWith($$"${") }
         ?: window.location.origin
     val kcUrl = (js("globalThis.KEYCLOAK_URL") as? String)
-        ?.takeIf { it.isNotBlank() && !it.startsWith("\${") }
+      ?.takeIf { it.isNotBlank() && !it.startsWith($$"${") }
     console.log("[Config] Fallback: apiBaseUrl=$apiBase, keycloakUrl=$kcUrl")
     return AppConfig(apiBaseUrl = apiBase, keycloakUrl = kcUrl)
 }