feat: Initial commit for DorkNet Admin Mobile app

- Implemented main application structure using .NET MAUI.
- Added App class to manage navigation between Login and Admin pages.
- Created AppDesign class for consistent UI styling.
- Developed pages: LoginPage, DashboardPage, PlayersPage, RoomsPage, SettingsPage, and AdminTabbedPage.
- Integrated AdminApiClient for API interactions and SecureAdminSettings for secure storage of sensitive data.
- Configured Android and iOS platform-specific files including manifest and app delegate.
- Added README with build instructions and authentication details.

DorkNet.AdminMobile/Services/SecureAdminSettings.cs

@@ -0,0 +1,50 @@
+using Microsoft.Maui.Storage;
+
+namespace DorkNet.AdminMobile.Services;
+
+public sealed record AdminConnectionSettings(
+    string BaseUrl,
+    string CloudflareAccessClientId,
+    string CloudflareAccessClientSecret,
+    string CloudflareAccessJwt);
+
+public sealed class SecureAdminSettings
+{
+    private const string BaseUrlKey = "admin.baseUrl";
+    private const string JwtKey = "admin.jwt";
+    private const string RefreshKey = "admin.refresh";
+    private const string CfClientIdKey = "cf.access.clientId";
+    private const string CfClientSecretKey = "cf.access.clientSecret";
+    private const string CfJwtKey = "cf.access.jwt";
+
+    public async Task<AdminConnectionSettings> LoadConnectionAsync()
+    {
+        var baseUrl = await SecureStorage.GetAsync(BaseUrlKey) ?? "https://admin.rec.net";
+        var cfId = await SecureStorage.GetAsync(CfClientIdKey) ?? string.Empty;
+        var cfSecret = await SecureStorage.GetAsync(CfClientSecretKey) ?? string.Empty;
+        var cfJwt = await SecureStorage.GetAsync(CfJwtKey) ?? string.Empty;
+        return new AdminConnectionSettings(baseUrl, cfId, cfSecret, cfJwt);
+    }
+
+    public async Task SaveConnectionAsync(AdminConnectionSettings settings)
+    {
+        await SecureStorage.SetAsync(BaseUrlKey, settings.BaseUrl.TrimEnd('/'));
+        await SecureStorage.SetAsync(CfClientIdKey, settings.CloudflareAccessClientId.Trim());
+        await SecureStorage.SetAsync(CfClientSecretKey, settings.CloudflareAccessClientSecret.Trim());
+        await SecureStorage.SetAsync(CfJwtKey, settings.CloudflareAccessJwt.Trim());
+    }
+
+    public Task<string?> GetJwtAsync() => SecureStorage.GetAsync(JwtKey);
+
+    public async Task SaveSessionAsync(string accessToken, string refreshToken)
+    {
+        await SecureStorage.SetAsync(JwtKey, accessToken);
+        await SecureStorage.SetAsync(RefreshKey, refreshToken);
+    }
+
+    public void ClearSession()
+    {
+        SecureStorage.Remove(JwtKey);
+        SecureStorage.Remove(RefreshKey);
+    }
+}