🤖 fix: restore model favorites in ChatInput

The ORPC migration PR accidentally removed the model favorites integration
from ChatInput. Restored:
- defaultModel and setDefaultModel from useModelLRU()
- useEffect to reset model to default when entering creation mode
- defaultModel and onSetDefaultModel props passed to ModelSelector

Author: ethanndickson

src/browser/components/ChatInput/index.tsx

@@ -140,7 +140,7 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
   const inputRef = useRef<HTMLTextAreaElement>(null);
   const modelSelectorRef = useRef<ModelSelectorRef>(null);
   const [mode, setMode] = useMode();
-  const { recentModels, addModel, evictModel } = useModelLRU();
+  const { recentModels, addModel, evictModel, defaultModel, setDefaultModel } = useModelLRU();
   const commandListId = useId();
   const telemetry = useTelemetry();
   const [vimEnabled, setVimEnabled] = usePersistedState<boolean>(VIM_ENABLED_KEY, false, {
@@ -178,6 +178,16 @@ 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.
+  useEffect(() => {
+    if (variant === "creation" && defaultModel) {
+      updatePersistedState(storageKeys.modelKey, defaultModel);
+    }
+  }, [variant, defaultModel, storageKeys.modelKey]);
+
   // Creation-specific state (hook always called, but only used when variant === "creation")
   // This avoids conditional hook calls which violate React rules
   const creationState = useCreationWorkspace(
@@ -972,6 +982,8 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
                   recentModels={recentModels}
                   onRemoveModel={evictModel}
                   onComplete={() => inputRef.current?.focus()}
+                  defaultModel={defaultModel}
+                  onSetDefaultModel={setDefaultModel}
                 />
                 <TooltipWrapper inline>
                   <HelpIndicator>?</HelpIndicator>