refactor: eliminate remaining Task 2/6/8 issues

- Route fetch('/.auth/me') through platformClient (HttpClient with empty baseUrl)
- Un-export parseTextContent/resolveImageUrl (module-internal only)
- DRY userId || 'anonymous' x6 into normalizeUserId() helper
- Remove redundant duplicate prompt field from WelcomeCard suggestions

Author: Shubhangi-Microsoft

content-gen/src/app/frontend/src/api/httpClient.ts

@@ -163,6 +163,12 @@ export class HttpClient {
 
 const httpClient = new HttpClient('/api');
 
+/**
+ * Client for Azure platform endpoints (/.auth/me, etc.) — no base URL prefix.
+ * Shares the same interceptor pattern but targets the host root.
+ */
+export const platformClient = new HttpClient('', 10_000);
+
 // ---- request interceptor: auth headers ----
 httpClient.onRequest((_url, init) => {
   const headers = new Headers(init.headers);

content-gen/src/app/frontend/src/api/index.ts

@@ -13,6 +13,11 @@ import httpClient from './httpClient';
 export { default as httpClient } from './httpClient';
 import { parseSSEStream, getGenerationStage } from '../utils';
 
+/** Normalize optional userId to a safe fallback. */
+function normalizeUserId(userId?: string): string {
+  return userId || 'anonymous';
+}
+
 /**
  * Get application configuration including feature flags
  */
@@ -32,7 +37,7 @@ export async function parseBrief(
   return httpClient.post<ParsedBriefResponse>('/brief/parse', {
     brief_text: briefText,
     conversation_id: conversationId,
-    user_id: userId || 'anonymous',
+    user_id: normalizeUserId(userId),
   }, { signal });
 }
 
@@ -47,7 +52,7 @@ export async function confirmBrief(
   return httpClient.post('/brief/confirm', {
     brief,
     conversation_id: conversationId,
-    user_id: userId || 'anonymous',
+    user_id: normalizeUserId(userId),
   });
 }
 
@@ -65,7 +70,7 @@ export async function selectProducts(
     request,
     current_products: currentProducts,
     conversation_id: conversationId,
-    user_id: userId || 'anonymous',
+    user_id: normalizeUserId(userId),
   }, { signal });
 }
 
@@ -85,7 +90,7 @@ export async function* streamChat(
     body: JSON.stringify({
       message,
       conversation_id: conversationId,
-      user_id: userId || 'anonymous',
+      user_id: normalizeUserId(userId),
     }),
   });
 
@@ -118,7 +123,7 @@ export async function* streamGenerateContent(
     products: products || [],
     generate_images: generateImages,
     conversation_id: conversationId,
-    user_id: userId || 'anonymous',
+    user_id: normalizeUserId(userId),
   }, { signal });
   const taskId = startData.task_id;
 
@@ -210,7 +215,7 @@ export async function* streamRegenerateImage(
       products: products || [],
       previous_image_prompt: previousImagePrompt,
       conversation_id: conversationId,
-      user_id: userId || 'anonymous',
+      user_id: normalizeUserId(userId),
     }),
   });
 

content-gen/src/app/frontend/src/components/WelcomeCard.tsx

@@ -9,19 +9,16 @@ import SecondPromptIcon from '../styles/images/secondprompt.png';
 
 interface SuggestionData {
   title: string;
-  prompt: string;
   icon: string;
 }
 
 const suggestions: SuggestionData[] = [
   {
     title: "I need to create a social media post about paint products for home remodels. The campaign is titled \"Brighten Your Springtime\" and the audience is new homeowners. I need marketing copy plus an image. The image should be an informal living room with tasteful furnishings.",
-    prompt: "I need to create a social media post about paint products for home remodels. The campaign is titled \"Brighten Your Springtime\" and the audience is new homeowners. I need marketing copy plus an image. The image should be an informal living room with tasteful furnishings.",
     icon: FirstPromptIcon,
   },
   {
     title: "Generate a social media campaign with ad copy and an image. This is for \"Back to School\" and the audience is parents of school age children. Tone is playful and humorous. The image must have minimal kids accessories in a children's bedroom. Show the room in a wide view.",
-    prompt: "Generate a social media campaign with ad copy and an image. This is for \"Back to School\" and the audience is parents of school age children. Tone is playful and humorous. The image must have minimal kids accessories in a children's bedroom. Show the room in a wide view.",
     icon: SecondPromptIcon,
   }
 ];
@@ -33,7 +30,7 @@ interface WelcomeCardProps {
 
 export const WelcomeCard = memo(function WelcomeCard({ onSuggestionClick, currentInput = '' }: WelcomeCardProps) {
   const selectedIndex = useMemo(
-    () => suggestions.findIndex(s => s.prompt === currentInput),
+    () => suggestions.findIndex(s => s.title === currentInput),
     [currentInput],
   );
 
@@ -99,7 +96,7 @@ export const WelcomeCard = memo(function WelcomeCard({ onSuggestionClick, curren
               title={suggestion.title}
               icon={suggestion.icon}
               isSelected={isSelected}
-              onClick={() => onSuggestionClick(suggestion.prompt)}
+              onClick={() => onSuggestionClick(suggestion.title)}
             />
             );
           })}

content-gen/src/app/frontend/src/store/appSlice.ts

@@ -61,7 +61,8 @@ export const fetchAppConfig = createAsyncThunk(
 export const fetchUserInfo = createAsyncThunk(
   'app/fetchUserInfo',
   async () => {
-    const response = await fetch('/.auth/me');
+    const { platformClient } = await import('../api/httpClient');
+    const response = await platformClient.raw('/.auth/me');
     if (!response.ok) return { userId: 'anonymous', userName: '' };
 
     const payload = await response.json();

content-gen/src/app/frontend/src/utils/contentParsing.ts

@@ -25,14 +25,14 @@ function rewriteBlobUrl(url: string): string {
 }
 
 /* ------------------------------------------------------------------ */
-/*  Exported utilities                                                 */
+/*  Parsing helpers (module-internal — not re-exported)                */
 /* ------------------------------------------------------------------ */
 
 /**
  * Parse `text_content` which may arrive as a JSON string or an object.
  * Returns an object with known fields, or `undefined` if unusable.
  */
-export function parseTextContent(
+function parseTextContent(
   raw: unknown,
 ): { headline?: string; body?: string; cta_text?: string; tagline?: string } | undefined {
   let textContent = raw;
@@ -64,7 +64,7 @@ export function parseTextContent(
  * Pass `rewriteBlobs: true` (default) when restoring from a saved
  * conversation; `false` when the response just came from the live API.
  */
-export function resolveImageUrl(
+function resolveImageUrl(
   raw: { image_url?: string; image_base64?: string },
   rewriteBlobs = false,
 ): string | undefined {