# Phase 11 Implementation Report

## 1. Executive summary

Phase 11 implements the production foundation for RentalDriveGo design tokens, themes, localization, directionality, route generation, metadata, typography, responsive layout, application shell, accessibility utilities, and global route states.

The implementation is integrated into the Phase 10 repository and packaged as a complete repository. Nine static repository gates pass. All 62 TypeScript and TSX source/test files pass a syntax transpilation scan.

**Formal acceptance remains blocked.** The local host exposes Node.js 22.16.0 instead of the pinned 24.17.0, and `corepack prepare pnpm@11.9.0 --activate` could not fetch the pnpm package. Consequently, frozen installation, Prettier, ESLint, strict TypeScript 6.0.3, Vitest, production build, audit, Playwright, axe execution, and screenshot generation were not run. These are explicit P11 release gates, not imaginary green checks.

## 2. Input files reviewed

Primary Phase 10 inputs reviewed:

- `docs/PHASE_10_HANDOFF_v1.0.md`
- `docs/PHASE_10_IMPLEMENTATION_REPORT_v1.0.md`
- `docs/architecture/ADR-0001_REPOSITORY_FOUNDATION.md`
- `docs/DEPENDENCY_MANIFEST_v1.0.md`
- `docs/IMPLEMENTATION_ISSUE_REGISTER_v1.0.csv`
- `PHASE_10_PACKAGE_MANIFEST_v1.0.json`
- `.github/workflows/ci.yml`
- `README.md`
- `package.json` and `pnpm-lock.yaml`

Phase 9 authorities reviewed or consumed:

- developer handoff and decision log;
- definition of done and open issue register;
- route manifest and localization implementation;
- English, French, and Arabic catalogs;
- design tokens, semantic token CSS, and token usage rules;
- component contracts, state matrix, responsive matrix, and RTL/theme matrix;
- accessibility, browser, performance, Playwright, and visual-regression specifications.

## 3. Baseline validation results

The Phase 10 report records a successful static/unit/build baseline with browser-environment exceptions. In this Phase 11 environment:

```bash
node --version
# v22.16.0

corepack prepare pnpm@11.9.0 --activate
# failed fetching the pnpm tarball from registry.npmjs.org
```

Because the approved package manager could not be activated, Phase 10 dependency-driven commands were not rerun. The immutable Phase 9 package validator was rerun successfully and all 61 manifested payload checksums match.

No `.env`, secret, cache, build output, coverage output, browser report, or test-result directory is included in the repository manifest.

## 4. Architecture decisions applied

`docs/architecture/ADR-0002_PHASE_11_FOUNDATIONS.md` records:

- additive component-token layering without modifying Phase 9;
- cookie-canonical theme persistence with local-storage continuity;
- nonce-bearing pre-paint resolution plus CSS-only system fallback;
- route-ID-driven locale switching and metadata;
- typed server catalogs and a minimal client shell-catalog boundary;
- explicit market inputs for formatting;
- local variable font packages with script-specific metrics;
- server-first shell composition with interaction-only client boundaries;
- native dialog mobile navigation;
- noindex pending route shells instead of invented destinations;
- production-route Playwright fixtures instead of a new Storybook dependency.

## 5. Token implementation

The traceable token flow is:

```text
Phase 9 raw token JSON
-> immutable Phase 9 semantic CSS
-> Phase 11 component-facing token layer
-> global styles and CSS Modules
```

`src/styles/component-tokens.css` adds required surface, text, border, interactive, focus, status, overlay, disabled, selection, skeleton, shadow, container, layering, typography, and layout roles.

No Phase 9 token was removed, renamed, or corrected. Phase 11 additions are documented in `docs/TOKEN_IMPLEMENTATION_v1.0.md` and enforced by `scripts/validate-phase11-foundation.mjs`.

## 6. Theme implementation

Implemented preferences:

- `light`
- `dark`
- `system`

Behavior:

- server reads `hpc-theme`;
- initial HTML exposes `data-theme-preference` and `data-theme`;
- a nonce-bearing head bootstrap resolves storage and system preference before interaction;
- explicit preferences ignore later operating-system changes;
- system mode tracks operating-system changes;
- cookie and local storage persist selection;
- same-window controls synchronize through a custom event;
- cross-tab changes synchronize through the storage event;
- a CSS media fallback keeps system-dark pages readable without JavaScript;
- no global theme transition is introduced.

## 7. Localization and routing implementation

Implemented:

- locale roots `/en`, `/fr`, and `/ar`;
- route-manifest generation for home, login, privacy, terms, and accessibility;
- semantic route resolution from localized slugs and pathnames;
- locale switching that preserves only approved campaign parameters and valid hashes;
- locale cookie persistence;
- exact shell key parity across all three locales;
- typed server catalog loading;
- localized pending routes for unresolved approved paths;
- no hidden English fallback.

Root detection remains cookie, then `Accept-Language`, then English.

## 8. RTL implementation

Arabic receives server-rendered `lang="ar"` and `dir="rtl"` before hydration. Application CSS passed the logical-property validator across 12 CSS files. The mobile drawer uses logical margins so its origin follows direction. Brand identity is not mirrored.

`BidiText` and identifier-preservation utilities support mixed Latin/Arabic plates, VINs, phones, reservation IDs, URLs, and similar atomic values.

## 9. Typography implementation

- Inter Variable for English and French.
- Noto Sans Arabic Variable for Arabic.
- Component-facing display, heading, body, label, caption, line-height, and tracking roles.
- Arabic-specific line height and no forced Latin tracking.
- Semantic heading hierarchy independent of visual token size.
- Content-driven block sizing and browser zoom compatibility foundations.

## 10. Application-shell implementation

Header:

- provisional text brand identity under the existing P10-002 gate;
- route-manifest home navigation;
- locale and theme controls;
- explicit unavailable login and demo treatments;
- sticky responsive composition;
- native modal mobile drawer below 1120 CSS px;
- Escape close, focus containment, background scroll lock, and focus return.

Footer:

- localized semantic groups;
- internal hash destinations from the home route;
- route-manifest legal and login links that open noindex pending shells;
- disabled contact and demo items rather than invented integrations;
- responsive stacked/grouped layout.

The homepage remains a Phase 11 foundation matrix, not the complete production marketing homepage. Approved navigation hashes point to clearly marked deferred-section fixtures.

## 11. Accessibility implementation

Implemented:

- skip link and stable `#main-content` target;
- visible `:focus-visible` treatment;
- semantic header, nav, main, sections, and footer landmarks;
- forced-colors focus support;
- reduced-motion behavior;
- visually hidden utility;
- accessible icon wrapper;
- live-region primitive;
- bidi isolation primitive;
- named icon-only controls;
- native dialog mobile navigation;
- localized loading, error, not-found, and pending states.

Automated axe tests are authored for all locale/theme combinations. Execution remains P11-001.

## 12. Metadata and SEO implementation

`src/lib/metadata/build-metadata.ts` generates server metadata from locale and route ID:

- localized title and description;
- self-referential canonical;
- reciprocal English, French, Arabic, and `x-default` alternates;
- Open Graph title, description, URL, site name, locale, and alternates;
- social summary metadata;
- release-safe robots behavior.

Pending destinations are always noindex. No organization, review, rating, pricing, legal, address, phone, or contact structured data is emitted.

## 13. Automated test results

Executed:

```bash
node scripts/run-validations.mjs
```

Result: **9 passed repository gates**.

- Phase 9 immutable contract: pass, 61 checksums.
- Runtime and direct-dependency pins: pass, Node 24.17.0, pnpm 11.9.0, and 25 exact direct versions represented in the lockfile.
- Locale key/direction parity: pass.
- Route/runtime/hash/query/`hreflang` parity: pass, 5 route IDs.
- Phase 9 token integrity: pass.
- Phase 11 foundation token/shell integrity: pass.
- Logical CSS: pass, 12 files.
- Prohibited content: pass.
- Metadata foundation: pass.

Executed syntax scan:

- 62 TypeScript/TSX files transpiled without syntax errors using host TypeScript 5.8.3.

Not executed because dependency installation was unavailable:

- Prettier check;
- ESLint;
- strict TypeScript 6.0.3 project check;
- Vitest and coverage;
- production build;
- pnpm audit;
- Playwright functional suites;
- axe execution;
- visual snapshot comparison.

Authored tests cover formatting, route resolution, theme persistence/system behavior, initial HTML, metadata, locale switching, pending routes, mobile navigation, skip focus, no-JavaScript behavior, responsive overflow, text expansion, accessibility, and visual matrices.

## 14. Manual QA results

Manual results are recorded in `docs/quality/MANUAL_QA_RESULTS_v1.0.csv`.

Static inspections passed for route parity, document RTL, logical CSS, reduced-motion rules, bidi primitives, content-driven layouts, and locale expansion structure.

Browser, assistive-technology, zoom, back/forward, theme persistence, mobile dialog, and production-build checks remain blocked pending an executable pinned environment.

## 15. Visual-regression coverage

Defined canonical scenarios:

- desktop English light and dark;
- tablet French light and dark;
- mobile Arabic light and dark;
- mobile Arabic dark drawer open;
- desktop English keyboard focus.

Generated baselines: **0**.

No fake screenshots were created. The exact status is recorded in `docs/quality/VISUAL_REGRESSION_RESULTS_v1.0.json` and P11-002.

## 16. Performance observations

- No new runtime dependency was added.
- Server components remain the default.
- Client boundaries are limited to route-aware navigation, selectors, theme synchronization, global localized client states, and mobile navigation.
- Fonts remain self-hosted package assets.
- No analytics, CRM, media player, component-workbench, CSS-in-JS, or state-management runtime was introduced.
- Dynamic SSR remains inherited because request-specific CSP nonces are required.

Measured build size and runtime performance were not available because the production build could not execute.

## 17. Deviations from Phase 9 or Phase 10

Documented deviations/additions:

1. A Phase 11 component-facing token layer was added because Phase 9 does not expose all required status, overlay, disabled, selection, skeleton, layout, and typography roles.
2. Phase 10’s package manifest remains a historical input. It is not used as the active integrity gate after legitimate Phase 11 source changes. Phase 11 has its own generated manifest and validator.
3. Storybook was not added because Phase 10 did not approve a workbench dependency. Production-route Playwright matrices and `tests/fixtures/foundation-matrix.json` are the approved equivalent.
4. Route-manifest legal and login paths render explicit pending shells because final content/destinations remain unresolved.

No immutable Phase 9 file was changed.

## 18. Open issues and release blockers

The complete register is `docs/IMPLEMENTATION_ISSUE_REGISTER_v1.1.csv`.

Phase 11-specific blockers:

- P11-001: browser and accessibility execution;
- P11-002: screenshot generation and review;
- P11-003: exact Node 24.17.0/pnpm 11.9.0 verification;
- P11-004: native French and Arabic shell-copy review.

Inherited Critical/High product, research, evidence, legal, localization, CRM, analytics, identity, and canonical-origin gates remain open. `PUBLIC_RELEASE_APPROVED` must remain false.

## 19. Files added, modified, and removed

The machine-readable list is `docs/quality/PHASE_11_FILE_CHANGES_v1.0.txt`.

Against the Phase 10 ZIP, the final delta is 55 added files, 24 modified files, and 0 removed files. The exact list is `docs/quality/PHASE_11_FILE_CHANGES_v1.0.txt`; the generated Phase 11 package manifest is the authoritative complete inventory of 201 hashed payload files.

## 20. Exact commands

Install:

```bash
corepack enable
corepack prepare pnpm@11.9.0 --activate
pnpm install --frozen-lockfile
```

Validate static foundations:

```bash
pnpm validate
pnpm validate:package
```

Local package-manifest verification completed successfully for 201 payload files after generation.

Validate quality and unit behavior:

```bash
pnpm format:check
pnpm lint
pnpm typecheck
pnpm test:unit
pnpm audit --audit-level low
```

Build and run:

```bash
SITE_ORIGIN=http://127.0.0.1:3000 PUBLIC_RELEASE_APPROVED=false pnpm build
HOSTNAME=127.0.0.1 PORT=3000 SITE_ORIGIN=http://127.0.0.1:3000 PUBLIC_RELEASE_APPROVED=false pnpm start
```

Browser and accessibility tests:

```bash
pnpm exec playwright install --with-deps chromium firefox webkit
pnpm test:browser
pnpm test:a11y
pnpm test:e2e
```

Visual baselines:

```bash
pnpm test:visual:update --project=chromium
pnpm test:visual --project=chromium
```

Regenerate and verify the package manifest only after all reviewed changes:

```bash
pnpm manifest:generate
pnpm validate:package
```
