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openspec/changes/enterprise-react-pdf/tasks.md

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+# Tasks: enterprise-react-pdf
+
+**Change ID**: enterprise-react-pdf
+**Package**: `@suaveplan/react-pdf`
+**Target path**: `react/media/react-pdf`
+**Prerequisite packages on Verdaccio**: `@suaveplan/error`, `@suaveplan/react-translate`
+
+---
+
+## 0. Pre-flight (non-negotiable)
+
+- [ ] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
+- [ ] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
+- [ ] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.
+
+## 1. Scaffold
+
+- [ ] Create directory tree. Write `package.json` at `0.1.0`, `tsconfig.json`, `vitest.config.ts`, scripts.
+- [ ] Dependencies: `@suaveplan/error workspace:^`, `@suaveplan/react-translate workspace:^`, `pdfjs-dist catalog:documents`, `zod catalog:forms`, `tslib catalog:build`.
+
+---
+
+## 2. Error codes and types
+
+- [ ] Define `PdfError`; codes: `PDF_LOAD_FAILED`, `PDF_RENDER_FAILED`.
+- [ ] Define `PdfViewerProps` (with `mode?: 'native' | 'pdfjs'`), `PdfToolbarProps`, `NativePdfViewerProps`, `PdfJsViewerProps`.
+
+---
+
+## 3. PdfToolbar
+
+- [ ] Props: `currentPage`, `totalPages`, `onPageChange(n)`, `zoom`, `onZoomChange(z)`.
+- [ ] Bug fix: `totalPages` accepts `0` and displays "–" (not "0 pages") when page count is unknown.
+- [ ] `useTranslation` for all button aria-labels and display strings.
+- [ ] Write test + stories (known-pages, unknown-pages, zoomed, playground) + md.
+
+---
+
+## 4. NativePdfViewer
+
+- [ ] Renders `<object type="application/pdf">` with fallback. Passes `#page=N` fragment.
+- [ ] `totalPages` is always `null` (browser does not expose it); `PdfToolbar` shows "–".
+- [ ] Write test + md.
+
+---
+
+## 5. PdfJsViewer
+
+- [ ] Loads PDF via `pdfjs-dist` `getDocument(url)`; reads `pdf.numPages`.
+- [ ] Renders current page on `<canvas>` with correct `devicePixelRatio` scaling.
+- [ ] Text layer: `PDFPageView.renderTextLayer()` for screen reader access.
+- [ ] `onPageChange(n)` re-renders page.
+- [ ] Throws `PdfError(PDF_LOAD_FAILED)` on `getDocument` failure; `PdfError(PDF_RENDER_FAILED)` on render failure.
+- [ ] Write `pdf-js-viewer.test.tsx` (≤500 lines): load PDF (DI-injected mock `pdfjs-dist`), page count read, page navigation, error states. `{ timeout: 10000 }`.
+- [ ] Write `pdf-js-viewer.md`.
+
+---
+
+## 6. PdfViewer (composite)
+
+- [ ] `mode: 'native' | 'pdfjs'` prop (default `'pdfjs'`); renders correct tier + `PdfToolbar`.
+- [ ] Write test + stories (native, pdfjs, loading, error, playground) + md.
+
+---
+
+## 7. E2E
+
+- [ ] `e2e/pdf.spec.ts` — Playwright:
+  - Render `PdfViewer` in pdfjs mode with a test PDF, verify page count displayed.
+  - Click Next in toolbar, verify current page increments.
+  - Render in native mode, verify `<object>` element present.
+
+---
+
+## 8. Verify and publish
+
+- [ ] `bunx turbo lint typecheck test --filter=@suaveplan/react-pdf` — green.
+- [ ] `bunx turbo test:coverage --filter=@suaveplan/react-pdf` — 100%.
+- [ ] `bun scripts/publish.ts --package @suaveplan/react-pdf`.
+- [ ] Archive change folder.