docs: update PROJECT_STATE and README for the final localization round

PROJECT_STATE.md: fix the stale "Product name: MobilityOps."/"PoC only"
locked-decisions lines (predate the Fleet Ops rebrand), fix the "Fleet
Ops correction" section header still reading "IN PROGRESS .../Not yet
merged to master" when it was in fact already merged (de0bdea, evidence
commit f780557), and append a new dated entry for this correction round
with commits and gate evidence so far.

README.md: reference docs/fleet-ops-final-localization/ alongside the
existing docs/fleet-ops-correction/ link, refresh the stale Playwright
test count (113 -> 138).

README.md

@@ -9,7 +9,10 @@ knowledge base, and this documentation. "MobilityOps" remains the technical
 identifier only — the repository name, local directory, package/module names, Docker
 Compose project, deployment directory, and database names. The UI is fully trilingual
 (nl-BE default, en-GB, fr-BE); see `docs/fleet-ops-correction/` for the localization
-architecture, the vehicle-status decision table, and the correction evidence.
+architecture, the vehicle-status decision table, and the correction evidence, and
+`docs/fleet-ops-final-localization/` for the follow-up correction round (remaining
+NL/FR translation gaps, centralized API-error localization, the time-dependent
+Europe/Brussels dashboard greeting).
 
 The web application uses the premium responsive **Control Rail** interface: a compact
 operations-first workspace with persisted readiness metrics, evidence-led exceptions,
@@ -123,7 +126,7 @@ All defaults are configurable via `.env` (see `.env.example`).
 ```bash
 make test    # backend: pytest (151 tests)
 make lint    # backend: ruff + mypy (strict, zero errors)
-make e2e     # frontend: Playwright end-to-end (113 tests, live stack required)
+make e2e     # frontend: Playwright end-to-end (138 tests, live stack required)
 ```
 
 Frontend build/typecheck: `cd frontend && npm run build` (`tsc -b && vite build`).