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Saxon Fletcher 78bd0e066b chore(studio): align query results grid typography with table editor (#49752)
## Summary
- Match Explorer/SQL query results table typography to Table Editor:
sans cells at `text-grid`, headers at `text-xs` / `text-foreground`
- Reuse Table Editor `NullValue` for null cells so empty results read
the same way
- When the Explorer feature preview is on, the inline editor "expand"
action opens a new Explorer query tab (same pattern as the assistant)
instead of the SQL Editor

## Test plan
- [ ] Run a query in Explorer and confirm header/cell font, size, and
color match Table Editor
- [ ] Confirm `NULL` cells use the same faded treatment as Table Editor
- [ ] Check the SQL Editor results pane (shared `DataGridResults`) still
looks correct
- [ ] With Explorer feature preview on, expand the inline editor and
confirm it creates an Explorer query tab with the current SQL, then
closes the panel
- [ ] With Explorer feature preview off, expand the inline editor and
confirm it still opens a SQL Editor snippet

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## New Features
- Added the ability to open SQL directly in Explorer from the editor
panel.
- Run SQL actions now create a query draft and navigate to the query
tab.

## Style
- Improved data grid readability with clearer text, left-aligned
headers, truncated labels, and selectable content.
- Added dedicated styling for null values.
- Updated empty-results messaging with standard sans-serif text.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: Cursor <cursoragent@cursor.com>
2026-08-31 18:38:30 +10:00
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