feat(email): add safe message detail

JobTrackerApi/Controllers/EmailController.cs

@@ -5,24 +5,24 @@ using Microsoft.AspNetCore.Mvc;
 
 namespace JobTrackerApi.Controllers;
 
+public sealed record EmailMessageDetailDto(
+    string Id,
+    string ThreadId,
+    string Subject,
+    string From,
+    string To,
+    DateTimeOffset? Date,
+    string Snippet,
+    string BodyText,
+    IReadOnlyList<string> Labels,
+    IReadOnlyList<EmailAttachmentRef> Attachments);
+
 [ApiController]
 [Route("api/email")]
 [Authorize(AuthenticationSchemes = "local")]
 public sealed class EmailController(IEmailProviderRegistry providers) : ControllerBase
 {
     public sealed record ProviderStatus(string Provider, string DisplayName, bool Connected, string? Address, bool CanRead, bool CanSend);
-    public sealed record MessageDetail(
-        string Id,
-        string ThreadId,
-        string Subject,
-        string From,
-        string To,
-        DateTimeOffset? Date,
-        string Snippet,
-        string BodyText,
-        IReadOnlyList<string> Labels,
-        IReadOnlyList<EmailAttachmentRef> Attachments);
-
     [HttpGet("providers")]
     public async Task<ActionResult<IReadOnlyList<ProviderStatus>>> GetProviders(CancellationToken cancellationToken)
     {
@@ -82,7 +82,7 @@ public sealed class EmailController(IEmailProviderRegistry providers) : Controll
     }
 
     [HttpGet("message")]
-    public async Task<ActionResult<MessageDetail>> GetMessage(
+    public async Task<ActionResult<EmailMessageDetailDto>> GetMessage(
         [FromQuery] string provider,
         [FromQuery] string messageId,
         CancellationToken cancellationToken)
@@ -97,7 +97,7 @@ public sealed class EmailController(IEmailProviderRegistry providers) : Controll
             return Conflict(new ProblemDetails { Title = "Email provider is not connected." });
 
         var detail = await resolved.GetMessageAsync(ownerUserId, messageId.Trim(), cancellationToken);
-        return Ok(new MessageDetail(
+        return Ok(new EmailMessageDetailDto(
             detail.Id,
             detail.ThreadId,
             detail.Subject,