Improve: Default transaction date filter and LLM response viewer

Transactions page now defaults to last 30 days when no date filters are
set. ViewReceipt page adds collapsible raw LLM response payload on
parse logs for debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

MoneyMap/Pages/Transactions.cshtml.cs

@@ -54,6 +54,13 @@ namespace MoneyMap.Pages
 
         public async Task OnGetAsync()
         {
+            // Default to last 30 days if no date filters provided
+            if (!StartDate.HasValue && !EndDate.HasValue)
+            {
+                StartDate = DateTime.Today.AddDays(-30);
+                EndDate = DateTime.Today;
+            }
+
             var query = _db.Transactions
                 .Include(t => t.Card)
                     .ThenInclude(c => c!.Account)

MoneyMap/Pages/ViewReceipt.cshtml

@@ -214,6 +214,15 @@
                             {
                                 <div class="small text-danger mt-1">@log.Error</div>
                             }
+                            @if (!string.IsNullOrWhiteSpace(log.RawProviderPayloadJson) && log.RawProviderPayloadJson != "{}")
+                            {
+                                <a class="small" data-bs-toggle="collapse" href="#rawPayload@(log.Id)" role="button" aria-expanded="false">
+                                    Show LLM Response
+                                </a>
+                                <div class="collapse mt-1" id="rawPayload@(log.Id)">
+                                    <pre class="bg-body-secondary p-2 rounded small" style="max-height: 400px; overflow: auto; white-space: pre-wrap; word-break: break-word;">@log.RawProviderPayloadJson</pre>
+                                </div>
+                            }
                         </div>
                     }
                 </div>