### Context
Just some housekeeping/consolidate refactors. There's a number of places
where we render the same "no result" empty state for tables. So this PR
just consolidates that into a reusable component `TableRowNoResults` to
reduce duplication.
Opting to save this under `components/ui` instead of the `ui` package as
this is more of a derivation of `TableRow` than a primitive
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **UI Improvements**
- Standardized empty search-result messages across database, functions,
storage, and vector bucket tables.
- Search terms now appear consistently when no matching records are
found.
- Added an accessible label to the vector bucket row actions menu.
- Improved the storage explorer loading layout so content expands to use
available vertical space.
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