fix(keyword-detector): respect ultrawork config variant instead of hardcoding "max"

Closes #1966

src/plugin/ultrawork-model-override.ts

@@ -114,10 +114,12 @@ export function applyUltraworkModelOverrideOnMessage(
   const override = resolveUltraworkOverride(pluginConfig, inputAgentName, output, sessionID)
   if (!override) return
 
+  if (override.variant) {
+    output.message["variant"] = override.variant
+    output.message["thinking"] = override.variant
+  }
+
   if (!override.providerID || !override.modelID) {
-    if (override.variant) {
-      output.message["variant"] = override.variant
-    }
     return
   }
 
@@ -131,10 +133,8 @@ export function applyUltraworkModelOverrideOnMessage(
   if (!messageId) {
     log("[ultrawork-model-override] No message ID found, falling back to direct mutation")
     output.message.model = targetModel
-    if (override.variant) {
-      output.message["variant"] = override.variant
-    }
     return
+
   }
 
   const fromModel = (output.message.model as { modelID?: string } | undefined)?.modelID ?? "unknown"