🤖 fix: prevent model selection reset in creation mode

The useEffect that initialized the project-scoped model in creation
mode was incorrectly re-running whenever `defaultModel` changed. This
meant if a user selected a different model from the dropdown and then
any storage event triggered a defaultModel update, their selection would
be silently overwritten with the favorite/default model.

Fix: Track initialization state with a ref so the model is only set once
per entry into creation mode, not on every defaultModel change. Reset
the ref when leaving creation mode so re-entering properly initializes.

_Generated with `mux`_

Author: ibetitsmike

src/browser/components/ChatInput/index.tsx

@@ -182,12 +182,21 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
     [storageKeys.modelKey, addModel]
   );
 
-  // When entering creation mode (or when the default model changes), reset the
-  // project-scoped model to the explicit default so manual picks don't bleed
-  // into subsequent creation flows.
+  // When entering creation mode, initialize the project-scoped model to the
+  // default so previous manual picks don't bleed into new creation flows.
+  // Only runs once per creation session (not when defaultModel changes, which
+  // would clobber the user's intentional model selection).
+  const creationModelInitialized = useRef<string | null>(null);
   useEffect(() => {
     if (variant === "creation" && defaultModel) {
-      updatePersistedState(storageKeys.modelKey, defaultModel);
+      // Only initialize once per project scope
+      if (creationModelInitialized.current !== storageKeys.modelKey) {
+        creationModelInitialized.current = storageKeys.modelKey;
+        updatePersistedState(storageKeys.modelKey, defaultModel);
+      }
+    } else if (variant !== "creation") {
+      // Reset when leaving creation mode so re-entering triggers initialization
+      creationModelInitialized.current = null;
     }
   }, [variant, defaultModel, storageKeys.modelKey]);