## Context
Just realised that chats in the new Explorer UI have no delete
functionality so this patches it
<img width="296" height="184" alt="image"
src="https://github.com/user-attachments/assets/90a79b6b-55a8-4122-8cd8-05fc13e9f4a5"
/>
Also added a confirmation modal for deletion
<img width="473" height="266" alt="image"
src="https://github.com/user-attachments/assets/56a1e400-2a1c-48b7-b6b8-0104af49b1a9"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added an option to delete Explorer chats from the chat toolbar.
- Added a confirmation prompt before permanently deleting chat history.
- Added success feedback after deletion is completed.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<img width="1693" height="1038" alt="image"
src="https://github.com/user-attachments/assets/9ef52446-c517-4ea9-ada6-ac6dc57c8af4"
/>
## Summary
- add an Explorer-specific chat toolbar with rename, chat ID,
permission, and branching controls
- list searchable non-support chats in Explorer with reactive updates
and safe rehydrated-date sorting
- add chat creation entry points to Explorer home and navigation menus
- route chat recent items correctly and show chat icons across shared
tab surfaces
- make the assistant sidebar expand action open the active chat in
Explorer
This is PR 3 of 3 and is stacked on #49031. Review #48973 first, then
#49031, then this PR. Compared with its base, this PR contains only
discovery, toolbar, and cross-surface integration work.
## To Test
- visit /explorer
- Create a new chat either via home tab chat input OR the chats sidebar
- Validate chats show up in sidebar
- Validate chat conversation works
- Close the chat tab and open a chat via sidebar
- Change permission settings via the chat tab toolbar and verify it
persists
## Test plan
- `mise exec node@22 -- pnpm --dir apps/studio exec tsc --noEmit`
- focused Vitest suite: 4 files / 5 tests covering reactive chat lists,
navigation filtering and sorting, recent-item routing, and sidebar
handoff
- ESLint on changed TypeScript files
- Prettier check on changed source files
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added chat creation from the Explorer home, navigation, and new-tab
menu.
- Added an Explorer chat toolbar with editable names, ID copying,
permissions, shortcuts, and metadata warnings.
- Added searchable chat history with sorting, active-chat highlighting,
and clear empty states.
- Chats can now open directly in Explorer from the AI Assistant panel.
- Recent items now link correctly to chats and notebooks.
- **Bug Fixes**
- Improved chat list updates after creation, deletion, and restored
sessions.
- Added safer handling for chats without update timestamps.
- **Tests**
- Expanded coverage for chat navigation, creation, metadata warnings,
shortcuts, and recent-item links.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Joshen Lim