Fix: portfolio mobile layout adjustments

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

site/blueprints/pages/project.yml

@@ -47,6 +47,7 @@ columns:
               - strike
               - clear
               - link
+            maxlength: 500
             help: Description complète du projet
 
       images:

src/views/Portfolio.svelte

@@ -369,6 +369,9 @@
 
     .portfolio {
       background: transparent;
+      width: 100vw;
+      height: auto;
+      overflow: hidden;
     }
 
     /* Gallery over background, under content */
@@ -378,13 +381,6 @@
       z-index: 1;
       transform: translateX(0vw);
       width: 100vw;
-      transition: all .3s ease-in-out;
-    }
-
-    :global(.slide.active .portfolio-gallery.mobile-only) {
-      transform: translateX(-10vw);
-      width: 120vw;
-      transition: all .3s ease-in-out .8s;
     }
 
     .content-background {