feat(admin): consentement aux annonces et désabonnement sans connexion

Les comptes déjà créés ne sont pas inscrits. Le choix est facultatif à l’inscription et dans les paramètres. Un lien public demande confirmation avant d’arrêter les actualités, sans toucher aux messages de compte.

memento-note/locales/en.json

@@ -1,4 +1,16 @@
 {
+  "unsubscribe": {
+    "title": "Stop news and offers?",
+    "body": "This only stops announcements and offers. Account, billing, and password messages are unchanged. Confirm with the button — opening this page is not enough.",
+    "confirm": "Stop announcements",
+    "keep": "Keep receiving them",
+    "successTitle": "You are unsubscribed",
+    "successBody": "You will no longer receive Memento news and offers at this address. Essential service messages may still arrive.",
+    "invalidTitle": "This link is not valid",
+    "invalidBody": "The link is missing or outdated. You can also stop announcements in Settings.",
+    "openSettings": "Open settings",
+    "backToSignIn": "Sign in"
+  },
   "auth": {
     "signIn": "Sign In",
     "signUp": "Sign Up",
@@ -14,6 +26,7 @@
     "forgotPassword": "Forgot password?",
     "noAccount": "Don't have an account?",
     "hasAccount": "Already have an account?",
+    "marketingConsent": "I agree to receive occasional Memento news and offers (optional). Essential messages about my account will continue.",
     "signInToAccount": "Sign in to your account",
     "createAccount": "Create your account",
     "rememberMe": "Remember me",
@@ -1092,6 +1105,11 @@
     "about": "About",
     "version": "Version",
     "settingsSaved": "Settings saved",
+    "marketingTitle": "News and offers",
+    "marketingDescription": "Receive occasional Memento news and offers. This is optional and separate from account, billing, and password messages.",
+    "marketingLegal": "You can stop at any time. A campaign already handed to the mail service cannot be pulled back.",
+    "marketingBlocked": "This address cannot receive announcements (complaint or permanent delivery failure).",
+    "settingsSaveFailed": "Could not save this choice.",
     "cardSizeMode": "Note Size",
     "cardSizeModeDescription": "Choose between variable sizes or uniform size",
     "selectCardSizeMode": "Select display mode",