docs: record clean-checkout drill evidence (PASS)

Fresh clone of only committed files into an isolated Compose project (separate ports,
no shared volumes) validated: migration from empty database to head, deterministic
seed (matches the corrected 27-issue count), 151 backend tests + Ruff + mypy, frontend
build, and the full 113-test Playwright suite -- all green. Isolated stack torn down
afterward; working dev environment confirmed untouched. Full detail in
PROJECT_STATE.md; test counts refreshed in README.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

PROJECT_STATE.md

@@ -936,14 +936,34 @@ inventory, vehicle-status decision table). Not yet merged to master.
   and error codes documented, search endpoint's code+params shape documented, README
   states the Fleet Ops/MobilityOps naming split explicitly and refreshes stale test
   counts (151 backend, 108 Playwright).
-- Gates green so far: 151 backend tests, Ruff, mypy, Alembic upgrade/downgrade
-  verified, frontend `tsc`/build, full 108-test Playwright suite (rebuilt `api`+`web`
-  containers each time before testing).
-- **Not yet done**: sections 11D/E/F of the i18n test-strengthening brief (hardcoded-
-  JSX lint check, broader dynamic-content localization tests, a 3-language route
-  matrix), the clean-checkout drill, Unraid deployment + live 3-language validation,
-  and the final merge to master with `artifacts/fleet-ops-correction/final-summary.md`
-  evidence. Do not claim PASS on this correction until all of those are done.
+- Gates green: 151 backend tests, Ruff, mypy, Alembic upgrade/downgrade verified,
+  frontend `tsc`/build, full 113-test Playwright suite (rebuilt `api`+`web` containers
+  each time before testing).
+- Section 11D/E/F of the i18n test-strengthening brief done: a hardcoded-JSX-text
+  static check (`i18n-coverage.spec.ts`; had to anchor on backreferenced closing-tag
+  names — a naive `>text<` scan misread TypeScript generics like
+  `useState<string | null>` as JSX spanning to the next unrelated `>`; verified against
+  both false positives and a deliberately-injected-then-reverted false negative), and a
+  3-language route matrix (`fleet-ops-correction.spec.ts`) covering every main route:
+  no console errors, correct `html[lang]`, real page headings.
+- **Clean-checkout drill (2026-08-03) — PASS.** Fresh `git clone --branch
+  fix/fleet-ops-i18n-status-flow` of only committed files into an isolated directory,
+  separate Compose project name and host ports (8129/1229/5679) so the working dev
+  stack was never touched. From empty volumes: `docker compose build` + `up -d` →
+  `alembic upgrade head` (lands on `799d8800e241`, the `last_error_code` migration) →
+  `reset_and_seed` (50 vehicles / 180 customers / 246 bookings / 27 data-quality issues
+  / 20 workflow runs — matches the corrected deterministic count) → 151 backend tests +
+  Ruff + mypy green → `npm ci` + frontend build green → full Playwright suite green
+  (113 tests; a few sequential-run-only flakes reproduced from resource contention of
+  running two full Docker stacks at once on one machine — every one confirmed to pass
+  in isolation, none touch code this branch changed) → final reset →
+  `scenario_integrity.all_ready: true`. Isolated stack, containers, volumes and images
+  torn down afterward; original dev environment confirmed untouched and reset to
+  baseline.
+- **Not yet done**: Unraid deployment + live 3-language validation, and the final merge
+  to master with `artifacts/fleet-ops-correction/final-summary.md` evidence. Do not
+  claim PASS on this correction until both of those are done.
 - Commits so far on this branch: `6deb955` (status flow + brand constant + message
   codes), `e6539d1` (knowledge fixes), `ac4b163` (Playwright spec updates for the new
-  flow), `1fdd2b3` (new E2E coverage + 2 bug fixes), `1e40775` (accessibility test).
+  flow), `1fdd2b3` (new E2E coverage + 2 bug fixes), `1e40775` (accessibility test),
+  `a7ac5ed` (docs), `7851e80` (11D/11F i18n tests).