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Dave b3dd5f5670 Story 20: New Session button to clear chat history

- Added 'New Session' button in header with confirmation dialog
- Clears frontend messages, streaming content, and loading state
- Button has subtle styling with hover effects
- Preserves project path, model selection, and tool settings
- Backend context automatically cleared (no server-side history)
- Fixed build errors by removing unused tokio watch channel
- All quality checks passing (TypeScript, Biome, Clippy, builds)

Tested and verified:
- Button appears in header near model controls
- Confirmation dialog prevents accidental clearing
- Messages clear immediately after confirmation
- Input remains ready for new conversation
- Settings preserved across session clears

2025-12-27 17:01:55 +00:00

2.1 KiB

Raw Blame History

Story 20: Start New Session / Clear Chat History

User Story

As a user, I want to be able to start a fresh conversation without restarting the entire application, so that I can begin a new task with completely clean context (both frontend and backend) while keeping the same project open.

Acceptance Criteria

There is a visible "New Session" or "Clear Chat" button in the UI
Clicking the button clears all messages from the chat history (frontend)
The backend conversation context is also cleared (no message history retained)
The input field remains enabled and ready for a new message
The button asks for confirmation before clearing (to prevent accidental data loss)
After clearing, the chat shows an empty state or welcome message
The project path and model settings are preserved (only messages are cleared)
Any ongoing streaming or tool execution is cancelled before clearing
The action is immediate and provides visual feedback

Out of Scope

Saving/exporting previous sessions before clearing
Multiple concurrent chat sessions or tabs
Undo functionality after clearing
Automatic session management or limits
Session history or recovery

Technical Notes

Frontend state (messages and streamingContent) needs to be cleared
Backend conversation history must be cleared (no retained context from previous messages)
Backend may need a clear_session or reset_context command
Cancel any in-flight operations before clearing
Should integrate with the cancellation mechanism from Story 13 (if implemented)
Button should be placed in the header area near the model selector
Consider using a modal dialog for confirmation
State: setMessages([]) to clear the frontend array
Backend: Clear the message history that gets sent to the LLM

Design Considerations

Button placement: Header area (top right or near model controls)
Button style: Secondary/subtle to avoid accidental clicks
Confirmation dialog: "Are you sure? This will clear all messages and reset the conversation context."
Icon suggestion: 🔄 or "New" text label

2.1 KiB Raw Blame History