fix(audit): Fortuna pass level, display-name persist, loadout & craft-timer queries

Audit of the emulator surface + 4 fixes:
- Fortuna pass level was frozen: nothing ever granted season XP. ClaimActiveContract
  now grants + persists FortunaPass{2,3}_SeasonXp (scaled to the contract's reputation)
  and returns the new total, so the pass level moves as you complete contracts.
- UpdateUserTitleDisplayName never persisted the rename (echoed back, lost on relog).
  Added DbUserService.UpdateDisplayNameAsync and call it.
- GetPlayerSets returned a blank loadout; now reads the persisted LOADOUT key.
- GetCraftingInProgressData was a stub; now returns the persisted CraftingTimer so an
  in-progress craft + remaining time survive a menu reopen/relog.

Remaining known gaps documented in Plane (need client data / multiplayer / out of scope).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Prospect.Server.Api/Controllers/ClientController.cs

@@ -274,8 +274,12 @@ public class ClientController : Controller
     [HttpPost("UpdateUserTitleDisplayName")]
     [Produces(MediaTypeNames.Application.Json)]
     [Authorize(AuthenticationSchemes = UserAuthenticationOptions.DefaultScheme)]
-    public IActionResult UpdateUserTitleDisplayName(FUpdateUserTitleDisplayNameRequest request)
+    public async Task<IActionResult> UpdateUserTitleDisplayName(FUpdateUserTitleDisplayNameRequest request)
     {
+        // Persist the rename, otherwise it is echoed back but lost on next login.
+        var userId = User.FindAuthUserId();
+        await _userService.UpdateDisplayNameAsync(userId, request.DisplayName);
+
         return Ok(new ClientResponse<FUpdateUserTitleDisplayNameResult>
         {
             Code = 200,