Switch MAX bridge to PyMax only

server/QMax.Api/Infrastructure/Max/MockMaxBridgeClient.cs

@@ -15,7 +15,7 @@ public sealed class MockMaxBridgeClient : IMaxBridgeClient
                     "max",
                     "MAX",
                     false,
-                    "Mock mode is active. Switch QMax:MaxMode to Playwright for real web.max.ru.",
+                    "Mock mode is active. Switch QMax:MaxMode to Worker and use qmax-pymax-worker for real MAX traffic.",
                     DateTimeOffset.UtcNow)
             ])
     ];
@@ -110,6 +110,6 @@ public sealed class MockMaxBridgeClient : IMaxBridgeClient
 
     private static string MockChatUrl(string externalChatId)
     {
-        return $"https://web.max.ru/mock/{Uri.EscapeDataString(externalChatId)}";
+        return $"pymax://mock/{Uri.EscapeDataString(externalChatId)}";
     }
 }

server/QMax.Api/Infrastructure/Max/WorkerMaxBridgeClient.cs

@@ -40,7 +40,7 @@ public sealed class WorkerMaxBridgeClient(
     public async Task<IReadOnlyList<MaxChatUpdate>> FetchUpdatesAsync(CancellationToken cancellationToken)
     {
         return await SendAsync<IReadOnlyList<MaxChatUpdate>>(HttpMethod.Get, "/updates", null, cancellationToken)
-            ?? Array.Empty<MaxChatUpdate>();
+            ?? throw new InvalidOperationException("MAX worker returned an empty updates response.");
     }
 
     public async Task<MaxChatUpdate?> FetchChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)