Standardize error toast messages (#820)

code/backend/Cleanuparr.Api/Features/Auth/Contracts/Responses/PlexPinStatusResponse.cs

@@ -5,9 +5,3 @@ public sealed record PlexPinStatusResponse
     public required int PinId { get; init; }
     public required string AuthUrl { get; init; }
 }
-
-public sealed record PlexVerifyResponse
-{
-    public required bool Completed { get; init; }
-    public TokenResponse? Tokens { get; init; }
-}

code/backend/Cleanuparr.Api/Features/Auth/Contracts/Responses/PlexVerifyResponse.cs

@@ -0,0 +1,17 @@
+namespace Cleanuparr.Api.Features.Auth.Contracts.Responses;
+
+/// <summary>
+/// Result of polling a Plex PIN for authorization.
+/// </summary>
+public sealed record PlexVerifyResponse
+{
+    /// <summary>
+    /// Whether the user has authorized the PIN on Plex.
+    /// </summary>
+    public required bool Completed { get; init; }
+
+    /// <summary>
+    /// Session tokens, issued only when a Plex login completes.
+    /// </summary>
+    public TokenResponse? Tokens { get; init; }
+}