chore: minor change

Author: NamesMT

apps/backend-convex/convex/http/ai.ts

@@ -149,7 +149,7 @@ aiApp
           threadId,
           role: 'user',
           content,
-          context: { ...context, uid: userIdentity?.subject ?? 'UNKNOWN' },
+          context: { ...context, uid: userIdentity?.subject ?? 'N/A' },
           provider,
           model,
           lockerKey,

apps/backend-convex/utils/message.ts

@@ -25,15 +25,15 @@ export function buildUserMessageContent({ content, context }: Pick<Doc<'messages
   let builtContent = ''
 
   if (context && Object.keys(context)) {
-    builtContent += `@--System context start@\n`
+    builtContent += `@--System Context Start@\n`
 
     if (context.from)
       builtContent += `From: "${context.from}"\n`
 
     if (context.uid)
       builtContent += `UID: "${context.uid}"\n`
 
-    builtContent += `@System context end--@\n\n`
+    builtContent += `@System Context End--@\n\n`
   }
 
   builtContent += content