Remove the build credit from the footer

Drops "Hecho con Angular, Analog y Nx." and the API link beside it,
leaving the copyright line on its own.

`footer.built` goes with it in all three locales. So does `footer.api`,
which was already dead -- declared and translated, never rendered.

The row's flex and space-between existed only to push the credit to the
far end, so they go too.

Verified in es/en/ca: no trace of the credit or the docs link in the
served HTML, and the copyright line renders in each.

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

landing/src/app/core/copy.ts

@@ -89,7 +89,7 @@ export interface Copy {
     error: string;
     closed: string;
   };
-  footer: { built: string; api: string; rights: string };
+  footer: { rights: string };
   maintenance: { title: string; back: string; until: string };
 }
 
@@ -180,8 +180,6 @@ const es: Copy = {
     closed: 'El formulario está cerrado temporalmente.',
   },
   footer: {
-    built: 'Hecho con Angular, Analog y Nx.',
-    api: 'Contenido servido por la API pública de Pireon.',
     rights: 'Todos los derechos reservados.',
   },
   maintenance: {
@@ -278,8 +276,6 @@ const en: Copy = {
     closed: 'The form is temporarily closed.',
   },
   footer: {
-    built: 'Built with Angular, Analog and Nx.',
-    api: 'Content served by the Pireon public API.',
     rights: 'All rights reserved.',
   },
   maintenance: {
@@ -376,8 +372,6 @@ const ca: Copy = {
     closed: 'El formulari està tancat temporalment.',
   },
   footer: {
-    built: 'Fet amb Angular, Analog i Nx.',
-    api: 'Contingut servit per l’API pública de Pireon.',
     rights: 'Tots els drets reservats.',
   },
   maintenance: {

landing/src/app/ui/site-footer.scss

@@ -2,19 +2,12 @@
   padding-block: 2.5rem 3rem;
 }
 
+// One line now. The flex row and its space-between existed to push the credit
+// to the far end; with a single child they only complicate the rule.
 .landing-footer__row {
-  display: flex;
-  flex-direction: column;
-  gap: 0.5rem;
-  justify-content: space-between;
   margin-top: 1.5rem;
 
   p {
     margin: 0;
   }
-
-  @media (min-width: 768px) {
-    flex-direction: row;
-    align-items: center;
-  }
 }

landing/src/app/ui/site-footer.ts

@@ -17,15 +17,8 @@ import type { Copy } from '../core/copy';
       <div class="landing-shell">
         <pi-divider color="grey" width="large" />
         <div class="landing-footer__row">
-          <p s pi-color color="grey">© {{ year }} Pireon. {{ copy().footer.rights }}</p>
           <p s pi-color color="grey">
-            {{ copy().footer.built }}
-            <a
-              href="https://landing-api.pireon.dev/docs/api"
-              target="_blank"
-              rel="noopener noreferrer"
-              >API ↗</a
-            >
+            © {{ year }} Pireon. {{ copy().footer.rights }}
           </p>
         </div>
       </div>