Fix RemoteConfigLoader to use Kotlin's built-in Result type

Changed from custom Result sealed class to kotlin.Result which has
proper success/failure factory methods. Updated pattern matching to
use getOrElse for cleaner error handling.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/src/main/kotlin/uk/silverlabs/silverdroid/config/RemoteConfigLoader.kt

@@ -24,7 +24,7 @@ object RemoteConfigLoader {
     suspend fun fetchConfig(
         remoteSettings: RemoteConfigSettings,
         userId: String? = null
-    ): Result<AppConfig> = withContext(Dispatchers.IO) {
+    ): kotlin.Result<AppConfig> = withContext(Dispatchers.IO) {
         try {
             val url = buildConfigUrl(remoteSettings, userId)
             Log.i(TAG, "Fetching config from: $url")
@@ -50,15 +50,15 @@ object RemoteConfigLoader {
                 val config = json.decodeFromString<AppConfig>(response)
 
                 Log.i(TAG, "Successfully loaded remote config for: ${config.appName}")
-                Result.success(config)
+                kotlin.Result.success(config)
             } else {
                 val error = "HTTP $responseCode: ${connection.responseMessage}"
                 Log.e(TAG, "Failed to fetch config: $error")
-                Result.failure(Exception(error))
+                kotlin.Result.failure(Exception(error))
             }
         } catch (e: Exception) {
             Log.e(TAG, "Error fetching remote config", e)
-            Result.failure(e)
+            kotlin.Result.failure(e)
         }
     }
 
@@ -98,14 +98,12 @@ object RemoteConfigLoader {
         }
 
         // Fetch remote config
-        return when (val result = fetchConfig(remoteSettings, userId)) {
-            is Result.Success -> {
-                Log.i(TAG, "Using remote configuration")
-                result.value
-            }
-            is Result.Failure -> {
-                Log.w(TAG, "Remote config failed, falling back to local", result.error)
+        return fetchConfig(remoteSettings, userId).getOrElse { error ->
+            Log.w(TAG, "Remote config failed, falling back to local", error)
             localConfig
+        }.also {
+            if (it != localConfig) {
+                Log.i(TAG, "Using remote configuration")
             }
         }
     }
@@ -114,8 +112,3 @@ object RemoteConfigLoader {
         private const val TAG = "RemoteConfigLoader"
     }
 }
-
-sealed class Result<out T> {
-    data class Success<T>(val value: T) : Result<T>()
-    data class Failure(val error: Exception) : Result<Nothing>()
-}