feat: add sessions endpoint with session management enhancements (#8596)

* 📝 (monitor.py): Add endpoint to get sessions and handle session_id encoding for API requests
📝 (use-get-messages-mutation.ts): Implement a mutation function to fetch messages with query parameters and handle session_id encoding for API requests
📝 (use-get-messages-polling.ts): Ensure proper encoding of session_id for API requests in polling mutation
📝 (use-get-messages.ts): Handle session_id encoding for API requests in messages query
📝 (new-modal.tsx): Implement functions to handle session deletion and proper encoding of session_id for API requests
📝 (utils.ts): Add functions to encode, decode, validate, format, and prepare session IDs for API requests

* 📝 (constants.ts): Add SESSIONS constant to API URLs for monitoring sessions
🔧 (use-delete-messages.ts): Add queryClient to UseRequestProcessor to invalidate sessions query
✨ (use-get-sessions-from-flow.ts): Introduce useGetSessionsFromFlowQuery to fetch sessions from flow
🔧 (use-rename-session.ts): Change refetchQueries to invalidateQueries for useGetSessionsFromFlowQuery
🔧 (custom-new-modal.tsx): Update import path for IOModal to playground-modal
🔧 (session-selector.tsx): Add setActiveSession function to handle setting active session
🔧 (sidebar-open-view.tsx): Add setActiveSession function to handle setting active session
♻️ (new-modal.tsx): Refactor IOModal into playground-modal and update functionality
♻️ (playground-modal.tsx): Refactor IOModal to handle playground-specific functionality
⬆️ (flowStore.ts): Add newChatOnPlayground state and setNewChatOnPlayground function
⬆️ (index.ts): Update FlowStoreType to include newChatOnPlayground and setNewChatOnPlayground

* 🔧 (pyproject.toml): update testpaths to point to the correct directory for tests
✨ (test_session_endpoint.py): add unit tests for sessions endpoint with flow_id filtering
♻️ (session-selector.tsx): refactor to trim editedSession before setting it
♻️ (sidebar-open-view.tsx): refactor to set visibleSession instead of activeSession

* ✨ (use-get-sessions-from-flow.ts): Always include the flow ID as the default session if it's not already present
♻️ (playground-modal.tsx): Refactor setting sessions to include currentFlowId as the default session if not present, and handle visibility of sessions more efficiently

* ♻️ (use-get-messages-mutation.ts): remove unused imports and refactor code for better readability and maintainability

* ✨ (test_session_endpoint.py): refactor test function names for better clarity and consistency

* ✨ (create-new-session-name.ts): add function to generate a new session name based on the current date and time
🔧 (playground-modal.tsx): import createNewSessionName function to dynamically set a new session name when no session is visible

* [autofix.ci] apply automated fixes

* ✨ (monitor.py): rename get_sessions endpoint to get_message_sessions for clarity and consistency
🔧 (constants.ts): remove unused SESSIONS constant from API URLs
🔧 (use-delete-messages.ts): remove commented out code and unnecessary comments
✨ (use-delete-sessions.ts): add functionality to delete sessions in frontend
🔧 (use-get-sessions-from-flow.ts): update API endpoint for getting sessions to match backend changes
🔧 (playground-modal.tsx): add functionality to delete sessions and associated messages in the UI, update UI optimistically, and handle errors appropriately

* [autofix.ci] apply automated fixes

* 🐛 (monitor.py): Fix type hinting issue in delete_messages function
📝 (monitor.py): Add comments and improve readability in test_messages_endpoints.py
📝 (session_endpoint.py): Update endpoint paths for consistency and clarity in test_session_endpoint.py

* [autofix.ci] apply automated fixes

* fix: update SQL statement to use col() for session_id filtering in get_message_sessions function

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

pyproject.toml

@@ -233,7 +233,7 @@ ignore-regex = '.*(Stati Uniti|Tense=Pres).*'
 timeout = 120
 timeout_method = "signal"
 minversion = "6.0"
-testpaths = ["tests", "integration"]
+testpaths = ["src/backend/tests"]
 console_output_style = "progress"
 filterwarnings = ["ignore::DeprecationWarning", "ignore::ResourceWarning"]
 log_cli = true