fix(frontend): align Settings desktop labels on French (#78)

UX decision (carnet #78): the human UI of IdeA is French by default,
uniform per surface — proper nouns and technical acronyms (URL, LAN,
IP/CIDR, HTTPS, API, CLI…) stay as-is. Settings mixed English (AI
Profiles, Deployment) with French (Appareils, frozen by UX for #77).

Renames the Settings menu/nav, the Profils IA and Déploiement panels
(titles, actions, states, help text) to French, per the carnet's
exhaustive list. Updates the affected tests accordingly.

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

frontend/src/features/first-run/ProfilesSettings.tsx

@@ -57,10 +57,10 @@ export function ProfilesSettings() {
   return (
     <Panel
       aria-label="ai profiles settings"
-      title="AI Profiles"
+      title="Profils IA"
       actions={
         <Button size="sm" onClick={() => setEditing(true)}>
-          Configure profiles
+          Configurer les profils
         </Button>
       }
     >
@@ -72,7 +72,7 @@ export function ProfilesSettings() {
         )}
 
         {profiles.length === 0 ? (
-          <p className="text-sm text-muted">No profiles configured.</p>
+          <p className="text-sm text-muted">Aucun profil configuré.</p>
         ) : (
           <ul className="flex flex-col divide-y divide-border">
             {profiles.map((p) => (
@@ -87,10 +87,10 @@ export function ProfilesSettings() {
                 <Button
                   size="sm"
                   variant="ghost"
-                  aria-label={`delete ${p.name}`}
+                  aria-label={`supprimer ${p.name}`}
                   onClick={() => void del(p.id)}
                 >
-                  Delete
+                  Supprimer
                 </Button>
               </li>
             ))}