feat(api): add controller infrastructure, Swagger, remove inline /api/audit

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

MoneyMap/MoneyMap.csproj

@@ -26,6 +26,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="10.1.7" />
   </ItemGroup>
 
   <ItemGroup>

MoneyMap/Program.cs

@@ -27,6 +27,10 @@ builder.Services.AddSession(options =>
 builder.Services.AddRazorPages()
     .AddSessionStateTempDataProvider();
 
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
 // Receipt parse queue and background worker
 builder.Services.AddSingleton<IReceiptParseQueue, ReceiptParseQueue>();
 builder.Services.AddHostedService<ReceiptParseWorkerService>();
@@ -70,21 +74,13 @@ app.UseSession();
 
 app.UseAuthorization();
 
-app.MapRazorPages();
-
-// Financial Audit API endpoint
-app.MapGet("/api/audit", async (
-    IFinancialAuditService auditService,
-    DateTime? startDate,
-    DateTime? endDate,
-    bool includeTransactions = false) =>
+if (app.Environment.IsDevelopment())
 {
-    var end = endDate ?? DateTime.Today;
-    var start = startDate ?? end.AddDays(-90);
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
 
-    var result = await auditService.GenerateAuditAsync(start, end, includeTransactions);
-    return Results.Ok(result);
-})
-.WithName("GetFinancialAudit");
+app.MapRazorPages();
+app.MapControllers();
 
 app.Run();