feat: add new-tab links and removable media previews (1.7.3)

public/assets/admin.css

@@ -708,6 +708,7 @@ details.card > summary:hover { background: #fafbf8 }
 
 /* Search and forms share usable widths throughout administration. */
 .field-wide{grid-column:1/-1;min-width:0}.field-wide textarea{width:100%;min-height:100px;resize:vertical}
+.selected-media-preview{margin:12px 0;padding:10px;border:1px solid var(--line);border-radius:9px;background:#fff;min-width:0}.selected-media-preview img{display:block;width:100%;height:140px;object-fit:contain;background:repeating-conic-gradient(#eef1eb 0% 25%,#fff 0% 50%) 0 0/16px 16px}.selected-media-preview figcaption{font-size:12px;line-height:1.5;overflow-wrap:anywhere;margin-top:8px;color:var(--muted)}
 .live-search-ready .search-submit{display:none}.search-status{min-height:20px;margin:-12px 0 0}#list-results{scroll-margin-top:16px}#list-results>.section-head{margin-top:0}#list-results:focus-visible{outline:2px solid var(--accent);outline-offset:5px}#search-error p{margin-top:0}
 .list-toolbar{display:flex;flex-wrap:wrap;align-items:end;gap:14px;padding:18px;margin:24px 0;background:var(--paper,#fff);border:1px solid var(--line,#dce3da);border-radius:12px}
 .list-toolbar>div{min-width:140px}.list-toolbar .list-search{flex:1;min-width:220px}.list-toolbar input,.list-toolbar select{width:100%}