## Context
More groundwork for the Explorer - this one's focused on initializing
the valtio store for managing notebooks
Store architecture will follow closely with the existing
sql-editor-store
No data persistence yet, but can test creating a new notebook
<img width="195" height="143" alt="image"
src="https://github.com/user-attachments/assets/8656fb5b-3a8e-4f71-b2ce-d2f34ca9b552"
/>
Which should open a placeholder page
<img width="1387" height="527" alt="image"
src="https://github.com/user-attachments/assets/4a81b1ae-a740-40e6-9d33-29fa4f83b541"
/>
Closing the notebook brings you back to the explorer home page
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added support for creating and opening project notebooks from the
Explorer.
* Added notebook tabs alongside existing entity and SQL tabs.
* Added notebook management, including loading, renaming, removing,
editing cells, and tracking unsaved changes.
* Added support for SQL, logs, and Markdown notebook cells.
* Added dedicated notebook routes and an initial notebook editor view.
* Added notebook icons throughout the Explorer interface.
* **Documentation**
* Documented session-scoped notebook state for query results and row
limits.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
More groundwork for the Explorer - initializing the home page
Note that nothing here is functional, all just visual still
<img width="1387" height="960" alt="image"
src="https://github.com/user-attachments/assets/d4967578-edbd-476f-8150-d9d5e9d66666"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a new Explorer landing page with an assistant chat form.
* Added quick actions for creating notebooks and SQL work.
* Added notebook and chat template cards for faster project exploration.
* **Improvements**
* Explorer content now fills the available page height.
* Assistant send button styling now reflects whether submission is
available.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Resolves FE-4074
Just adds scaffolding for the explorer UI - no data fetching yet.
Initializes the page + side nav, based off Saxon's POC in
`poc/explorer-prototype`
<img width="1389" height="500" alt="image"
src="https://github.com/user-attachments/assets/8f293992-97d9-403e-91d6-2e104cd20eb5"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## New Features
- Added a project Explorer page accessible from
`/project/:ref/explorer`.
- Added navigation for browsing notebooks and chats.
- Added search fields, back navigation, animated transitions, and empty
states for Explorer sections.
- Added a conditional Explorer link to the SQL Editor menu when enabled.
## Documentation
- Marked the Explorer route migration as complete in the migration
checklist.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Joshen Lim