Use the websocket infra for sending requests when feature flag is turned on

[dkhalife]

No description provided.

[Copilot]

Pull request overview

This PR implements WebSocket-based request/response infrastructure controlled by a new sendViaWebsocket feature flag. When enabled (and WebSocket is connected), API requests are sent via WebSocket instead of HTTP, maintaining backward compatibility through a transport abstraction layer.

Key changes:

• Added sendViaWebsocket feature flag and transport abstraction layer that conditionally routes requests through WebSocket or HTTP
• Implemented request/response pattern in WebSocketManager with timeout handling, pending request tracking, and error handling
• Migrated all API endpoints (tasks, labels, tokens, notifications) to use the transport layer with corresponding WebSocket action definitions
• Changed token ID type from string to number for consistency across the codebase

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
frontend/src/constants/featureFlags.ts	Added new sendViaWebsocket feature flag definition
frontend/test/constants/featureFlags.test.ts	Updated test to include the new feature flag
frontend/src/api/transport.ts	New transport abstraction that routes requests to WebSocket or HTTP based on feature flag and connection state
frontend/src/utils/websocket.ts	Added request/response handling with pending request tracking, timeout management, and error handling
frontend/src/models/websocket.ts	Extended WebSocket action/payload definitions for all API operations and updated token ID types to number
frontend/src/api/tasks.ts	Migrated all task endpoints to use transport layer with WebSocket support
frontend/src/api/labels.ts	Migrated all label endpoints to use transport layer with WebSocket support
frontend/src/api/tokens.ts	Migrated all token endpoints to use transport layer with WebSocket support, updated token ID type to number
frontend/src/api/users.ts	Migrated notification settings endpoint to use transport layer with WebSocket support
frontend/src/utils/marshalling.ts	Made MarshallLabels generic to work with both Task and Omit<Task, 'id'> types
frontend/src/models/token.ts	Changed token ID type from string to number and added optional scopes field
frontend/src/store/tokensSlice.ts	Updated deleteToken parameter type from string to number
frontend/src/views/Settings/APITokenSettings.tsx	Updated token ID types from string to number

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