fix(chat): stop loading bubble early, no tab switch on inject, convert md->html in richtext

memento-note/components/contextual-ai-chat.tsx

@@ -151,7 +151,9 @@ export function ContextualAIChat({
 
   const { messages, sendMessage, status, stop } = useChat({ transport })
 
-  const isLoading = status === 'submitted' || status === 'streaming'
+  const lastMsg = messages[messages.length - 1]
+  const lastMsgHasContent = lastMsg?.role === 'assistant' && !!getMessageContent(lastMsg)
+  const isLoading = (status === 'submitted' || status === 'streaming') && !lastMsgHasContent
 
   useEffect(() => {
     messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' })
@@ -304,16 +306,15 @@ export function ContextualAIChat({
   /** Called from chat hover-actions: inject a chat message into the note */
   const handleInjectFromChat = async (msgText: string, mode: 'replace' | 'complete' | 'merge') => {
     if (mode === 'replace') {
+      // Stay on chat tab — show preview inline via resourcePreview without switching tabs
       setResourceText(msgText)
       setResourceMode('replace')
       setResourcePreview({ text: msgText, source: 'chat' })
-      setActiveTab('resource')
       return
     }
     setResourceText(msgText)
     setResourceMode(mode)
-    setActiveTab('resource')
-    // Auto-launch enrichment
+    // Do NOT switch tabs — enrich and show preview in current tab
     setResourceEnriching(true)
     try {
       const res = await fetch('/api/ai/enrich-from-resource', {