Disable reasoning by default across clients

platform/openwebui/filters/auto_tool_selector.py

@@ -18,7 +18,9 @@ class Filter:
         enabled: bool = True
         max_automatic_tools: int = 8
         show_selection_status: bool = True
-        enable_multidomain_reasoning: bool = True
+        # Never enable reasoning merely because several tools are selected.
+        # Thinking remains an explicit user choice for the current request.
+        enable_multidomain_reasoning: bool = False
         multidomain_reasoning_effort: str = "medium"
         multidomain_reasoning_budget: int = 3072