style: force 2-column grid on watch section (ia page)

auto-fill was creating 3+1 layout on wide screens. Fixed to repeat(2, 1fr)
for symmetric 2×2. Mobile stays 1-column via existing media query.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Author: ferr079

src/pages/fr/ia.astro

@@ -458,7 +458,7 @@ import StatsBar from '../../components/StatsBar.astro';
   /* Watch grid */
   .watch-grid {
     display: grid;
-    grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
+    grid-template-columns: repeat(2, 1fr);
     gap: 1rem;
   }
 

src/pages/ia.astro

@@ -458,7 +458,7 @@ import StatsBar from '../components/StatsBar.astro';
   /* Watch grid */
   .watch-grid {
     display: grid;
-    grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
+    grid-template-columns: repeat(2, 1fr);
     gap: 1rem;
   }