feat: background AI generation with session-level isolation and hard-…#349
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- Add BackgroundGenerationManager (asyncio.Semaphore(3)) so generation
tasks survive HTTP disconnects when users switch conversations
- Refactor /api/agent/chat/stream: separate background task writes to DB
while SSE generator relays from asyncio.Queue; return 429 when limit hit
- Add GET /api/agent/generation/status and DELETE /api/agent/generation/{sid}
- Add hard_delete_conversation (cascade: message_thinking -> messages ->
conversations) replacing soft delete; cancel background task before delete
- Frontend: per-conversation AbortController map so switching tabs does not
abort other conversations' background streams
- Redux: backgroundGeneratingConversations[] tracks active streams
- Chat history list item: Spin badge when conversation is generating,
dispatch deleteConversation action for immediate sidebar removal
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Description
Background Generation Tracking and State Management:
backgroundGeneratingConversationsarray to the Reduxchat-historystate to track which conversations have active background generation streams, along with actions and reducers to add or remove conversation IDs as streams start or stop. [1] [2] [3] [4]use-chat-streamhook to dispatch Redux actions when a conversation’s generation starts or ends, ensuring global state accurately reflects ongoing background activity. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]UI Improvements for Generation Status:
ChatHistoryListItemcomponent to display a spinner (Spin) next to conversations that are currently generating, based on Redux state, and to immediately remove conversations from the sidebar UI upon deletion. [1] [2] [3] [4]Chat Streaming Service Refactor:
ChatStreamServiceto maintain a map ofAbortControllerinstances per conversation, allowing independent start/stop of streams for each conversation and avoiding interference between simultaneous background generations. Added methods to abort streams for a specific conversation or all conversations, and to check if a conversation is currently streaming. [1] [2] [3]These changes collectively enable more reliable, responsive, and user-friendly background AI chat generation across multiple conversations.
Closes: #348