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/translate.json

@@ -49,12 +49,8 @@
   "translate.glossary.targetWarningBut": "mais votre document cible",
   "translate.glossary.targetWarningEnd": "Les termes risquent de ne pas être pertinents.",
   "translate.header.processing": "Traitement en cours",
-  "translate.header.aiActive": "Analyse IA active",
   "translate.header.aiActiveDesc": "Votre mise en page est en cours de préservation par notre moteur contextuel.",
   "translate.header.completed": "Complété",
-  "translate.header.completedTitle": "Traduction terminée",
-  "translate.header.proSpace": "Espace Pro",
-  "translate.header.translateDoc": "Traduire un document",
   "translate.header.translateDocDesc": "Conservez la mise en page d'origine grâce au moteur de traduction ultra-haute fidélité.",
   "translate.upload.nativeFormat": "Format natif",
   "translate.fileType.word": "Word (.docx)",
@@ -68,12 +64,7 @@
   "translate.contextEngineActive": "Moteur contextuel actif",
   "translate.phase1": "Phase 1 : Initialisation",
   "translate.phase2": "Phase 2 : Reconstruction contextuelle",
-  "translate.stat.segments": "segments",
-  "translate.stat.precision": "précision",
-  "translate.stat.speedLabel": "vitesse",
-  "translate.stat.turbo": "Turbo",
   "translate.stat.time": "temps",
-  "translate.complete.masterQuality": "✓ Qualité Maître",
   "translate.download": "Télécharger",
   "translate.newTranslation": "+ Nouvelle traduction",
   "translate.failedTitle": "Erreur lors de la traduction",
@@ -81,10 +72,6 @@
   "translate.uploadAnother": "Téléverser un autre fichier",
   "translate.monitor": "Moniteur IA",
   "translate.summary": "Récapitulatif",
-  "translate.cancelProcess": "⟳ Annuler le processus",
-  "translate.layoutIntegrity": "Intégrité Layout",
-  "translate.secureHundred": "100% SÉCURISÉ",
-  "translate.okHundred": "100% OK",
   "translate.preserveLayout": "Conserver la mise en page",
   "translate.preserveLayoutDesc": "Conserver la mise en page",
   "translate.textOnly": "Texte brut",