## Summary
Adds support for creating Chatterbox TTS nodes when clicking Chatterbox
models in the Cloud asset browser.
## Changes
### modelToNodeStore.ts
- Add `findProvidersWithFallback()` helper for hierarchical model type
lookups (e.g., `parent/child` falls back to `parent`)
- Register 4 Chatterbox model directories with empty widget keys:
- `chatterbox/chatterbox` → `FL_ChatterboxTTS`
- `chatterbox/chatterbox_turbo` → `FL_ChatterboxTurboTTS`
- `chatterbox/chatterbox_multilingual` → `FL_ChatterboxMultilingualTTS`
- `chatterbox/chatterbox_vc` → `FL_ChatterboxVC`
### createModelNodeFromAsset.ts
- Skip widget assignment when `provider.key` is empty (for nodes that
auto-load models without a widget selector)
### Tests
- Add tests for hierarchical fallback behavior
- Add tests for empty widget key (auto-load nodes)
- Add Chatterbox node types to mock data
## Notes
- Empty `key` convention: Chatterbox nodes auto-load their models and
don't have a model selector widget, so we register them with `key: ''`
and skip the widget assignment step
- Hierarchical fallback only goes one level deep (`a/b/c` → `a`, not
`a/b`)
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8418-feat-add-Chatterbox-model-support-for-Cloud-asset-browser-2f76d73d365081be822bc369b155f099)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Subagent 5 <subagent@example.com>
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: GitHub Action <action@github.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>
