Revert "fix: address PR review - ChatInput event type, userId fallback, contentParsing docstring"

This reverts commit f6722be.

Author: Shubhangi-Microsoft

src/App/src/api/httpClient.ts

@@ -178,7 +178,7 @@ httpClient.onRequest(async (_url, init) => {
   try {
     const { store } = await import('../store/store');
     const state = store?.getState?.();
-    const userId: string = state?.app?.userId || 'anonymous';
+    const userId: string = state?.app?.userId ?? 'anonymous';
     headers.set('X-Ms-Client-Principal-Id', userId);
   } catch {
     headers.set('X-Ms-Client-Principal-Id', 'anonymous');

src/App/src/components/ChatInput.tsx

@@ -43,7 +43,8 @@ export const ChatInput = memo(function ChatInput({
     if (controlledValue === undefined) setInternalValue(v);
   }, [controlledOnChange, controlledValue]);
 
-  const handleSubmit = useCallback(() => {
+  const handleSubmit = useCallback((e: React.FormEvent) => {
+    e.preventDefault();
     if (inputValue.trim() && !disabled) {
       onSendMessage(inputValue.trim());
       setInputValue('');
@@ -53,7 +54,7 @@ export const ChatInput = memo(function ChatInput({
   const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
     if (e.key === 'Enter' && !e.shiftKey) {
       e.preventDefault();
-      handleSubmit();
+      handleSubmit(e);
     }
   }, [handleSubmit]);
 

src/App/src/utils/contentParsing.ts

@@ -61,8 +61,8 @@ function parseTextContent(
  * Resolve the best available image URL from a raw API response.
  *
  * Priority: explicit `image_url` (with blob rewrite) → base64 data URI.
- * Pass `rewriteBlobs: true` when restoring from a saved
- * conversation; `false` (default) when the response just came from the live API.
+ * Pass `rewriteBlobs: true` (default) when restoring from a saved
+ * conversation; `false` when the response just came from the live API.
  */
 function resolveImageUrl(
   raw: { image_url?: string; image_base64?: string },