fix: ora le ricerche lavorano nuovamente in cache. feat: aggiunto pulsante per eliminare rapidamente una ricerca testuale. feat: la ricerca in alto a destra rimanda alla ricerca spudorata ed il campo viene liberato.

public/index.html

@@ -197,13 +197,8 @@
             <input type="text" class="search-input" id="global-search"
               placeholder="Cerca ticket (numero, titolo o corpo)..." style="padding-right: 32px;" />
             <button id="global-search-clear"
-              style="position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: none; padding: 4px; cursor: pointer; color: var(--text-muted); display: none; align-items: center; justify-content: center;"
-              title="Cancella ricerca">
-              <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"
-                style="width:14px;height:14px;display:block;">
-                <path d="M18 6L6 18M6 6l12 12" />
-              </svg>
-            </button>
+              style="position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: none; padding: 0; cursor: pointer; color: var(--text-muted); display: none; align-items: center; justify-content: center; font-size: 13px; line-height: 1;"
+              title="Cancella ricerca">✕</button>
           </div>
           <button class="btn btn-primary btn-sm" id="topbar-new-ticket" onclick="window.location.hash='#/tickets/new'">
             <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="width:16px;height:16px;">