Refactor: Improve admin settings layout for better responsiveness

Co-authored-by: mathieumoran1 <[email protected]>

public/control.html

@@ -135,9 +135,11 @@
                 Pilote tout le site (films, checklist, statistiques).
               </div>
               <label for="active_oscar_year" class="form-label">Année active</label>
-              <div class="input-group">
-                <select class="form-select" id="active_oscar_year"></select>
-                <button type="button" id="save-active-year" class="btn btn-warning">Appliquer</button>
+              <div class="admin-settings-narrow">
+                <div class="input-group">
+                  <select class="form-select" id="active_oscar_year"></select>
+                  <button type="button" id="save-active-year" class="btn btn-warning">Appliquer</button>
+                </div>
               </div>
               <div class="form-text">Basé sur les années présentes dans les films.</div>
             </div>

public/css/app.css

@@ -320,4 +320,15 @@ footer {
     width: 18px;
     height: 18px;
     margin-left: 0;
+  }
+
+  /* Admin → Settings: keep controls compact */
+  .admin-settings-narrow {
+    max-width: 520px;
+  }
+
+  @media (max-width: 576px) {
+    .admin-settings-narrow {
+      max-width: 100%;
+    }
   }