feat: Add conversation history management and fix WebSocket/Docker networking issues

[vedant-theagentic]

Summary

This PR adds conversation history management functionality to the frontend and fixes critical WebSocket and Docker networking issues in the backend.

Features Added

1. Conversation History Management

• Automatic Persistence: Conversations are automatically saved to browser localStorage
• Conversation List: View, load, and delete saved conversations via sidebar
• Export Functionality: Export conversations as JSON or Markdown
• UI Components:
  • History button in header (clock icon)
  • Conversation sidebar with metadata (title, date, message count)
  • Hover actions for quick export/delete

2. Technical Improvements

• Redux middleware for automatic localStorage persistence
• React context for managing conversation list state
• Conversation management utilities (save, load, delete, export)
• Auto-cleanup when storage quota exceeded (keeps 50 most recent)

Bug Fixes

1. WebSocket Connection Errors

Problem: WebSocket errors when clients disconnect - "Cannot call 'send' once a close message has been sent" and "WebSocket is not connected" errors.

Solution:

• Added proper WebSocketDisconnect exception handling in cortex_on/main.py
• Implemented connection state checks before sending messages
• Added graceful cleanup in finally block
• Prevents crashes when clients disconnect during task execution

Files Changed:

• cortex_on/main.py - Enhanced WebSocket endpoint with proper error handling

2. Docker Networking Connection Error

Problem: cortex_on service couldn't connect to agentic_browser service - "Cannot connect to host localhost:8000" errors.

Solution:

• Changed hardcoded localhost:8000 to use Docker service name agentic_browser:8000
• Added support for AGENTIC_BROWSER_URL environment variable
• Defaults to Docker service name for containerized deployments
• Falls back to localhost for local development

Files Changed:

• cortex_on/agents/web_surfer.py - Dynamic API URL configuration
• cortex_on/agents/orchestrator_agent.py - Updated WebSurfer initialization

3. Minor Fixes

• Fixed typo: a500 → 500 in orchestrator_agent.py

Files Changed

New Files

• frontend/src/dataStore/persistenceMiddleware.ts - Redux middleware for localStorage
• frontend/src/utils/conversationUtils.ts - Conversation management utilities
• frontend/src/components/home/ConversationList.tsx - Conversation sidebar component
• frontend/src/contexts/ConversationContext.tsx - React context for state management

Modified Files

• frontend/src/dataStore/store.ts - Added persistence middleware
• frontend/src/dataStore/messagesSlice.ts - Added clearMessages action, localStorage loading
• frontend/src/components/home/Header.tsx - Added History button
• frontend/src/components/home/Chat.tsx - Integrated ConversationList
• frontend/src/App.tsx - Added ConversationProvider
• cortex_on/main.py - Fixed WebSocket error handling
• cortex_on/agents/web_surfer.py - Fixed Docker networking
• cortex_on/agents/orchestrator_agent.py - Updated WebSurfer init, fixed typo