fix(ui): wave 2 from critique re-run — AA contrast, unified PageHeader, checkout confirm

Nav: teams/settings/services back out of the nav until product-ready (user
decision); teams page was already half-finished (UUID member display is a
backend limitation).

Payment: explicit confirmation dialog (plan, amount, billing period, Stripe
note) before any redirect; ?plan= URL now pre-opens the dialog instead of
triggering a silent checkout.

Contrast AA sweep (71 replacements): functional micro-labels raised to
>=60-65% opacity and >=10px across sidebar, header, pricing, landing;
decorative all-caps 'interface' label removed.

Design unification: new PageHeader component (accent pill + serif
base/accent title) applied to settings, services, reviews, teams; pricing
header returned to the editorial voice (serif + accent pill); dead
GlossaryCard deleted.

i18n residuals: suggestion chips, 'Standard' provider label, notification
close, model-combobox strings extracted (+broken bg-surface/border-border-
subtle tokens fixed); ~45 new keys EN+FR; 13 dead keys removed; zero
missing keys verified.

Reviews: icon-only row actions now carry visible text; 'Approve all' is
two-step armed-confirm.

Accelerators: Ctrl/Cmd+Enter submits; arrow-key navigation in the language
combobox; recent-jobs history cap 8->20 with per-job download; source=target
config rejected; empty 'Master Quality' badge removed.

Cookie consent: reopenable via footer link, emoji replaced with drawn icon.

Verified: build exit 0, vitest 9/9, eslint 64 errors = previous level,
0 missing i18n keys.

frontend/src/lib/i18n/messages/fr/cookieConsent.json

@@ -3,5 +3,6 @@
   "cookieConsent.description": "Nous utilisons des cookies strictement nécessaires au fonctionnement du service (session, sécurité, langue). Avec votre accord, nous pouvons aussi utiliser des cookies optionnels pour mesurer l'audience et améliorer le produit.",
   "cookieConsent.acceptAll": "Tout accepter",
   "cookieConsent.essentialOnly": "Nécessaires uniquement",
-  "cookieConsent.learnMore": "En savoir plus"
+  "cookieConsent.learnMore": "En savoir plus",
+  "cookieConsent.reopen": "Préférences cookies"
 }