Fix: Abbrechen-Dialog, Overlay-Stacking, Queue-Cancel

1. Confirm-Dialog z-index ueber Progress-Popup (10000 > 9000)
2. Progress-Popup wird ausgeblendet waehrend Confirm-Dialog offen
3. Kein dunkler-werdendes Overlay bei mehrfachem Abbrechen-Klick
4. Abbrechen funktioniert jetzt auch fuer Lagen in der Warteschlange
   (werden direkt aus der Queue entfernt statt auf Start zu warten)
5. Cancel-Status wird im Popup-Titel angezeigt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/static/css/style.css

@@ -1710,7 +1710,7 @@ a:hover {
     inset: 0;
     background: var(--backdrop);
     backdrop-filter: blur(4px);
-    z-index: 100;
+    z-index: 10000;
     align-items: center;
     justify-content: center;
 }

src/static/js/app.js

@@ -2224,23 +2224,41 @@ async handleRefresh() {
 
     async cancelRefresh() {
         if (!this.currentIncidentId) return;
-        const ok = await confirmDialog('Laufende Recherche abbrechen?');
-        if (!ok) return;
 
+        // Temporarily hide progress popup so confirm dialog is fully visible
+        const progressOverlay = document.getElementById('progress-overlay');
+        if (progressOverlay) progressOverlay.style.display = 'none';
+
+        const ok = await confirmDialog('Laufende Recherche abbrechen?');
+
+        // Restore progress popup if not confirmed
+        if (!ok) {
+            const state = UI._progressState[this.currentIncidentId];
+            if (state && progressOverlay) progressOverlay.style.display = 'flex';
+            return;
+        }
+
+        // Show cancelling state in popup
+        if (progressOverlay) progressOverlay.style.display = 'flex';
         const btn = document.getElementById('progress-cancel-btn');
         if (btn) {
             btn.textContent = 'Wird abgebrochen...';
             btn.disabled = true;
         }
+        const titleEl = document.getElementById('progress-popup-title');
+        if (titleEl) titleEl.textContent = 'Wird abgebrochen...';
 
         try {
-            await API.cancelRefresh(this.currentIncidentId);
+            const result = await API.cancelRefresh(this.currentIncidentId);
+            if (!result) {
+                UI.showToast('Kein aktiver Refresh zum Abbrechen gefunden.', 'info');
+                if (btn) { btn.textContent = 'Abbrechen'; btn.disabled = false; }
+                if (titleEl) titleEl.textContent = 'Aktualisierung l\u00e4uft';
+            }
         } catch (err) {
             UI.showToast('Abbrechen fehlgeschlagen: ' + err.message, 'error');
-            if (btn) {
-                btn.textContent = 'Abbrechen';
-                btn.disabled = false;
-            }
+            if (btn) { btn.textContent = 'Abbrechen'; btn.disabled = false; }
+            if (titleEl) titleEl.textContent = 'Aktualisierung l\u00e4uft';
         }
     },