fix(tui): preserve selected model on refresh (#25993)

packages/opencode/src/cli/cmd/tui/context/local.tsx

@@ -397,23 +397,15 @@ export const { use: useLocal, provider: LocalProvider } = createSimpleContext({
       },
     }
 
-    // Automatically update model when agent changes
     createEffect(() => {
       const value = agent.current()
-      if (!value) return
-      if (value.model) {
-        if (isModelValid(value.model))
-          model.set({
-            providerID: value.model.providerID,
-            modelID: value.model.modelID,
-          })
-        else
-          toast.show({
-            variant: "warning",
-            message: `Agent ${value.name}'s configured model ${value.model.providerID}/${value.model.modelID} is not valid`,
-            duration: 3000,
-          })
-      }
+      if (!value?.model) return
+      if (isModelValid(value.model)) return
+      toast.show({
+        variant: "warning",
+        message: `Agent ${value.name}'s configured model ${value.model.providerID}/${value.model.modelID} is not valid`,
+        duration: 3000,
+      })
     })
 
     const result = {