Implement profiles management and settings API

- Added Profile and ProfileList structs to manage user profiles with unique IDs and nicknames.
- Introduced endpoints for CRUD operations on profiles: `/api/profiles` for managing profiles and `/api/profiles/switch` for switching active profiles.
- Implemented settings management with an endpoint `/api/settings` to handle user preferences like font size and debug mode.
- Enhanced the server to load and save profiles from a `profiles.json` file.
- Updated the fetcher initialization to respect the active profile's configuration.
- Added comprehensive end-to-end tests for profiles and settings APIs to ensure functionality and persistence.

android/app/src/main/java/com/thefeed/android/MainActivity.kt

@@ -65,7 +65,7 @@ class MainActivity : ComponentActivity() {
         webView.webViewClient = object : WebViewClient() {
             override fun onPageFinished(view: WebView?, url: String?) {
                 if (url != null && url.startsWith("http://127.0.0.1")) {
-                    txtStatus.text = "Connected"
+                    txtStatus.text = ""
                     retryCount = 0
                 }
             }
@@ -128,7 +128,7 @@ class MainActivity : ComponentActivity() {
 
     companion object {
         private const val MAX_RETRIES = 25
-        private const val RETRY_DELAY_MS = 2000L
-        private const val INITIAL_DELAY_MS = 5000L
+        private const val RETRY_DELAY_MS = 10000L
+        private const val INITIAL_DELAY_MS = 15000L
     }
 }