Migrate Prompt Playwright test to gallery

[heswell]

Summary

• add the Rsbuild human-readable component gallery backed by showcase examples
• migrate the Prompt component test to the gallery mount API
• run the migrated Prompt test in Chromium, Firefox, and WebKit projects
• build the gallery once in CI and reuse it across browser jobs
• remove the obsolete experimental Playwright CT dependency and scripts to prevent duplicate Playwright runtimes

Validation

• npm run playwright:gallery:build
• PLAYWRIGHT_GALLERY=production npm exec -- playwright test --config=playwright.config.ts --project=components-chromium --project=components-firefox --project=components-webkit
• 9 passed

The migration remains intentionally limited to the Prompt test. The failed Rspack webpackContext story-loader change was not included.

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[heswell]

Lint cleanup pushed in 6b8e2ab: replaced all remaining @playwright/experimental-ct-react and @playwright/experimental-ct-core imports across the vuu-ui component-test scope with @playwright/test types/APIs, including shared assertions/config and MountResult type references. No test bodies or showcase locations were changed. Results: npm run lint:error passed; npm run typecheck passed; gallery build plus exact Chromium/Firefox/WebKit matrix passed 9/9.

[heswell]

Migrated all 10 Playwright component test files under vuu-ui/packages/vuu-table plus TableOM to the standard gallery story-ID API. Showcase examples remain in place; gallery now registers the basket module needed by sizing stories; component projects include the vuu-table test glob. Removed experimental CT imports/usages in this package. Commit: facafe10c.

Validation: npm run lint:error passed; npm run typecheck passed; gallery build passed with the existing dynamic-import warning. Full 267-test Chromium/Firefox/WebKit matrix reached 252 passed, 13 skipped, 2 failed. The remaining failures are browser-flaky focus/selection assertions: Chromium Table-selection shift-click range selection and Firefox Table-scrolling page-down/page-up focus restoration. No failures were masked.

[heswell]

Completed repository-wide migration of remaining Playwright component tests to the standard gallery in commit 73dc4027a. Migrated 24 remaining test files outside Prompt/vuu-table, updated component project discovery to all **/*.playwright.test.tsx, preserved showcase examples in place, and moved the selection matcher into the standard Playwright config. No experimental CT imports/usages remain outside dependency guidance files.

Also fixed migration synchronization issues: awaited vuu-table selection assertions and added virtualization waits around Page Up/Page Down. Validation: npm run lint:error passed; npm run typecheck passed; gallery build passed (existing Feature.tsx dynamic-import warning); complete matrix ran 831 tests with 803 passed, 24 skipped, and 4 unresolved failures. Remaining failures: Chart EditableChart sizing in Chromium and Firefox (equal-height behavior), and FilterPill menu visibility in WebKit (both tests). A targeted FilterPill rerun reproduced the WebKit behavior; assertions were not weakened or masked.

[heswell]

Compared current workflow/config against the known-good gallery implementation. The build-once/reuse flow is already present and complete in the PR: playwright-gallery-build builds playwright/gallery/dist once and uploads a one-day artifact; the three browser jobs depend on it, download the artifact, serve it through playwright:gallery:serve, and run components-${{ matrix.browser }} using playwright.config.ts. No Rspack webpackContext loader is present. No additional workflow code was necessary.

Validated workflow YAML syntax successfully. Local production-gallery path is coherent: gallery build completed successfully, then Chromium ran 277 tests (274 passed, 2 skipped, 1 existing Chart EditableChart sizing failure) in 53.5s. Existing full matrix result remains 831 total: 803 passed, 24 skipped, 4 unresolved browser-specific failures.

[heswell]

Added Istanbul coverage in commit 8f12961e2 while preserving the build-once gallery flow. Instrumentation uses @rsbuild/plugin-babel + babel-plugin-istanbul; Playwright collects Chromium window.__coverage__ data, and istanbul-lib-*/istanbul-reports generate JSON, JSON summary, HTML, LCOV, text summary, aggregate totals, and one row for every direct vuu-ui/packages/* directory. CI builds the instrumented gallery once, uploads it, collects coverage only in the Chromium matrix job, downloads/merges coverage in the report job, uploads the coverage artifact, and appends the Istanbul summary to the job summary. No V8 reporting was retained.

Validation: npm ci --dry-run --ignore-scripts, workflow YAML parse, npm run lint:error, npm run typecheck, instrumented gallery build, and representative Prompt + vuu-table Chromium run (6/6) all passed. Istanbul report generated successfully: aggregate Lines 19.0% (4439/23400), Functions 10.1% (520/5131), Branches 7.7% (1050/13663), Statements 18.7% (4487/23959), with 28 package rows including zero-coverage packages. Existing limitation: coverage is collected from Chromium only to avoid triplicating instrumentation data across browser jobs; the full matrix retains previously reported browser-specific failures.

[heswell]

Fixed artifact action pins in commit 605b87289. Replaced all four actions/upload-artifact references that used the failing 330a01c490aca151604b8cf639adc76d48f6c5d4/typo variant with verified immutable commit 043fb46d1a93c77aae656e7c1c64a875d1fc6a0a (upload-artifact v7.0.1, Node 24-compatible). Verified download pins too: 3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c (v8.0.1) and 018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 (v6.0.0) both exist upstream. Workflow YAML parses successfully; no other artifact references remain invalid.

[heswell]

Superseded by #2355, which uses the finos/vuu branch.