Clarify logout and invite voluntary Open Food Facts contributions

frontend/app/page.tsx

@@ -43,7 +43,7 @@ export default function Home() {
       </div>
 
       <footer
-        className="mx-auto mt-5 flex w-full max-w-3xl flex-col gap-2 rounded-2xl border border-brand-secondary/15 bg-white/95 px-5 py-4 text-xs text-brand-secondary/80 shadow-sm sm:flex-row sm:items-center sm:justify-between"
+        className="mx-auto mt-5 flex w-full max-w-3xl flex-col gap-2 rounded-2xl border border-brand-secondary/15 bg-white/95 px-5 py-4 text-xs leading-relaxed text-brand-secondary/80 shadow-sm"
         aria-label="Product scope and data attribution"
       >
         <p className="font-semibold text-brand-primary">
@@ -69,6 +69,20 @@ export default function Home() {
             ODbL
           </a>
         </p>
+        <div className="mt-2 flex flex-col gap-2 border-t border-brand-secondary/10 pt-3 sm:flex-row sm:items-center sm:justify-between sm:gap-5">
+          <p>
+            Thank you to the Open Food Facts community for making open food data
+            available. Want to help? Contributions are always voluntary.
+          </p>
+          <a
+            href="https://connect.openfoodfacts.org/join-the-contributor-skill-pool-open-food-facts"
+            target="_blank"
+            rel="noopener noreferrer"
+            className="inline-flex min-h-11 shrink-0 items-center gap-1 self-start rounded-lg px-2 py-2 font-semibold text-brand-primary underline decoration-brand-primary/30 underline-offset-4 transition hover:decoration-brand-primary focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand-primary sm:self-auto"
+          >
+            Contribute to Open Food Facts <span aria-hidden="true">↗</span>
+          </a>
+        </div>
       </footer>
     </main>
   );

frontend/components/XamanLoginPanel.tsx

@@ -1615,8 +1615,8 @@ export function XamanLoginPanel() {
               </p>
               <p className="mt-0.5 text-xs leading-relaxed text-brand-secondary/75">
                 {loginSurfaceMode === "embedded"
-                  ? "One button safely ends both sessions."
-                  : "Sign out on this device when you’re finished."}
+                  ? "Log out of CalorieToken.net and CalorieApp on this device."
+                  : "Log out on this device when you’re finished."}
               </p>
             </div>
             <button
@@ -1625,11 +1625,7 @@ export function XamanLoginPanel() {
               disabled={isLoggingOut}
               className="inline-flex min-h-11 items-center justify-center rounded-full bg-brand-primary px-5 py-2.5 text-sm font-bold text-white shadow-sm transition hover:-translate-y-0.5 hover:opacity-90 hover:shadow-md disabled:cursor-not-allowed disabled:opacity-70"
             >
-              {isLoggingOut
-                ? "Signing out..."
-                : loginSurfaceMode === "embedded"
-                  ? "Sign out everywhere"
-                  : "Sign out"}
+              {isLoggingOut ? "Logging out..." : "Log out"}
             </button>
           </div>
 

tools/tests/xaman_login_start_retry.test.mjs

@@ -87,7 +87,7 @@ test("login surface fails closed until an embedded parent is trusted", async ()
   assert.match(source, /type:\s*"calorieapp:bridge:initialized"/);
   assert.match(source, /event\.data\?\.type === "calorieapp:logout"/);
   assert.match(source, /type:\s*"calorieapp:logout:request"/);
-  assert.match(source, /Sign out everywhere/);
+  assert.match(source, /Log out of CalorieToken\.net and CalorieApp on this device\./);
   assert.match(source, /requestCalorieAppLogout\(\)/);
 });