Retarget attribution integration test imports to @quarto/preview-renderer

Two PR-#190 integration tests imported the framework + previewRegistry
via relative paths that were valid before the ts-packages reorg:

- q2-debug/attribution.integration.test.tsx — `Ast` from `'../framework'`
- q2-preview/attribution.integration.test.tsx — same, plus
  `previewRegistry` from `'./registry'`

Both paths point at locations the feature branch moved into
ts-packages/preview-renderer. The standalone `tsc --noEmit` runs and
`cargo xtask verify --skip-hub-tests` missed it because
`vitest.integration.config.ts` only picks these files up via
`test:integration` / `test:ci`. CI surfaced it on PR #214 (q2-debug +
q2-preview attribution test files: 2 failed, 6 passed).

Retarget both:
- `Ast` → `@quarto/preview-renderer/framework`
- `previewRegistry` → `@quarto/preview-renderer/q2-preview`

`q2DebugRegistry` stays on its relative `./registry` import — q2-debug
itself didn't move with the framework extraction.

Full `cargo xtask verify` (including `test:integration` + `test:ci`)
now green locally; the hub-client suite reports 66 integration tests
and 79 CI tests passing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: cscheid

hub-client/src/components/render/q2-debug/attribution.integration.test.tsx

@@ -3,7 +3,7 @@
  */
 import { describe, it, expect, afterEach } from 'vitest';
 import { render, cleanup, fireEvent } from '@testing-library/react';
-import { Ast } from '../framework';
+import { Ast } from '@quarto/preview-renderer/framework';
 import { q2DebugRegistry } from './registry';
 
 afterEach(() => {

hub-client/src/components/render/q2-preview/attribution.integration.test.tsx

@@ -3,8 +3,8 @@
  */
 import { describe, it, expect, afterEach } from 'vitest';
 import { render, cleanup, fireEvent } from '@testing-library/react';
-import { Ast } from '../framework';
-import { previewRegistry } from './registry';
+import { Ast } from '@quarto/preview-renderer/framework';
+import { previewRegistry } from '@quarto/preview-renderer/q2-preview';
 
 afterEach(() => {
   cleanup();