fix: address CodeRabbitAI review comments for conversation history

- Fix duplicate onConversationCreated callbacks by tracking activeConversationId
- Fix history loss when switching conversations with Map-based deduplication
- Disable input while conversation is loading to prevent message routing issues
- Gate WebSocket debug logs behind DEV flag (import.meta.env.DEV)
- Downgrade server logging from info to debug level for reduced noise
- Fix .gitignore prefixes for playwright paths (ui/playwright-report/, ui/test-results/)
- Remove debug console.log from ConversationHistory.tsx
- Add staleTime (30s) to single conversation query for better caching
- Increase history message cap from 20 to 35 for better context
- Replace fixed timeouts with condition-based waits in e2e tests

ui/src/hooks/useAssistantChat.ts

@@ -120,7 +120,9 @@ export function useAssistantChat({
     ws.onmessage = (event) => {
       try {
         const data = JSON.parse(event.data) as AssistantChatServerMessage;
-        console.log('[useAssistantChat] Received WebSocket message:', data.type, data);
+        if (import.meta.env.DEV) {
+          console.debug('[useAssistantChat] Received WebSocket message:', data.type, data);
+        }
 
         switch (data.type) {
           case "text": {
@@ -278,7 +280,9 @@ export function useAssistantChat({
             payload.conversation_id = existingConversationId;
             setConversationId(existingConversationId);
           }
-          console.log('[useAssistantChat] Sending start message:', payload);
+          if (import.meta.env.DEV) {
+            console.debug('[useAssistantChat] Sending start message:', payload);
+          }
           wsRef.current.send(JSON.stringify(payload));
         } else if (wsRef.current?.readyState === WebSocket.CONNECTING) {
           checkAndSendTimeoutRef.current = window.setTimeout(checkAndSend, 100);

ui/src/hooks/useConversations.ts

@@ -25,6 +25,7 @@ export function useConversation(projectName: string | null, conversationId: numb
     queryKey: ['conversation', projectName, conversationId],
     queryFn: () => api.getAssistantConversation(projectName!, conversationId!),
     enabled: !!projectName && !!conversationId,
+    staleTime: 30_000, // Cache for 30 seconds
   })
 }