Remove schedule-specific styles, use shared mpr-dropdown-preview

Schedule preview now uses mpr-dropdown-preview from prestashop-admin package.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sources/scss/components/_list-preview.scss

@@ -518,72 +518,4 @@
     }
 }
 
-// =============================================================================
-// Schedule Preview Dropdown (for admin list columns)
-// =============================================================================
-
-.schedule-preview-dropdown {
-    display: none;
-    position: absolute;
-    top: 100%;
-    left: 50%;
-    transform: translateX(-50%);
-    margin-top: 4px;
-    z-index: 1000;
-    min-width: 180px;
-    padding: $es-spacing-sm;
-    background: $es-white;
-    border: 1px solid $es-border-color;
-    border-radius: $es-radius-md;
-    box-shadow: $es-shadow-lg;
-    font-size: $es-font-size-sm;
-    text-align: left;
-    white-space: nowrap;
-}
-
-.schedule-preview-item {
-    display: flex;
-    align-items: flex-start;
-    gap: $es-spacing-sm;
-    padding: $es-spacing-xs 0;
-    color: $es-text-primary;
-
-    .material-icons {
-        flex-shrink: 0;
-        font-size: 16px;
-        color: $es-text-muted;
-    }
-
-    strong {
-        font-weight: $es-font-weight-semibold;
-    }
-
-    .schedule-time {
-        color: $es-text-muted;
-    }
-}
-
-// Badge trigger for schedule preview
-.btn-schedule-preview {
-    position: relative;
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    gap: 0.25rem;
-    min-width: 20px;
-    height: 20px;
-    padding: 0 0.5rem;
-    background: $es-primary;
-    color: $es-white;
-    font-size: $es-font-size-xs;
-    font-weight: $es-font-weight-semibold;
-    border-radius: 50rem;
-    cursor: pointer;
-    text-transform: none;
-
-    .icon-eye {
-        font-size: 10px;
-        line-height: 1;
-        opacity: 0.8;
-    }
-}
+// Schedule Preview - uses shared mpr-dropdown-preview from prestashop-admin