Version 1 (#160)

New front-end
Launch Chat API
Manage Sources
Enable re-embedding of all contents
Sources can be added without a notebook now
Improved settings
Enable model selector on all chats
Background processing for better experience
Dark mode
Improved Notes

Improved Docs: 
- Remove all Streamlit references from documentation
- Update deployment guides with React frontend setup
- Fix Docker environment variables format (SURREAL_URL, SURREAL_PASSWORD)
- Update docker image tag from :latest to :v1-latest
- Change navigation references (Settings → Models to just Models)
- Update development setup to include frontend npm commands
- Add MIGRATION.md guide for users upgrading from Streamlit
- Update quick-start guide with correct environment variables
- Add port 5055 documentation for API access
- Update project structure to reflect frontend/ directory
- Remove outdated source-chat documentation files

.env.example

@@ -1,4 +1,10 @@
 
+# API CONFIGURATION
+# URL where the API can be accessed by the browser
+# Default: http://localhost:5055 (works for most Docker setups)
+# Change this if you're running on a different host/port (e.g., http://your-server-ip:5055)
+API_URL=http://localhost:5055
+
 # SECURITY
 # Set this to protect your Open Notebook instance with a password (for public hosting)
 # OPEN_NOTEBOOK_PASSWORD=