## Summary
Extract internal logic from the 2 remaining VTU holdout components into
composables, enabling full VTL migration.
## Changes
- **What**: Extract `useProcessedWidgets` from `NodeWidgets.vue`
(486→135 LOC) and `useWidgetSelectItems`/`useWidgetSelectActions` from
`WidgetSelectDropdown.vue` (563→170 LOC). Rewrite both component test
files as composable unit tests + slim behavioral VTL tests. Remove
`@vue/test-utils` devDependency.
- **Dependencies**: Removes `@vue/test-utils`
## Review Focus
- Composable extraction is mechanical — no logic changes, just moving
code into testable units
- `useProcessedWidgets` handles widget deduplication, promotion border
styling, error detection, and identity resolution (~290 LOC)
- `useWidgetSelectItems` handles the full computed chain from widget
values → dropdown items including cloud asset mode and multi-output job
resolution (~350 LOC)
- `useWidgetSelectActions` handles selection resolution and file upload
(~120 LOC)
- 40 new composable-level unit tests replace 13 `wrapper.vm.*` accesses
across the 2 holdout files
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10966-refactor-extract-composables-from-VTU-holdout-components-complete-VTL-migration-33c6d73d36508148a3a4ccf346722d6d)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Amp <amp@ampcode.com>
## Summary
Migrates all unit tests from `tests-ui/` to colocate with their source
files in `src/`, improving discoverability and maintainability.
## Changes
- **What**: Relocated all unit tests to be adjacent to the code they
test, following the `<source>.test.ts` naming convention
- **Config**: Updated `vitest.config.ts` to remove `tests-ui` include
pattern and `@tests-ui` alias
- **Docs**: Moved testing documentation to `docs/testing/` with updated
paths and patterns
## Review Focus
- Migration patterns documented in
`temp/plans/migrate-tests-ui-to-src.md`
- Tests use `@/` path aliases instead of relative imports
- Shared fixtures placed in `__fixtures__/` directories
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7811-chore-migrate-tests-from-tests-ui-to-colocate-with-source-files-2da6d73d36508147a4cce85365dee614)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: GitHub Action <action@github.com>
