feat(sources): Review-Queue-UI fuer LLM-Klassifikations-Vorschlaege (Admin)

- Tab-Schalter im Quellen-Modal: "Quellenliste" vs. "Klassifikations-Review"
  (Review-Tab nur fuer org_admin sichtbar, mit Pending-Counter-Badge).
- Review-Karten zeigen Diff aktueller Wert -> LLM-Vorschlag pro Achse,
  Konfidenz-Indikator (gruen/gelb/rot), LLM-Begruendung, Buttons fuer
  Uebernehmen / Verwerfen / Neu klassifizieren.
- Toolbar: Konfidenz-Filter, "Klassifikation starten" (Bulk im Hintergrund),
  "Alle >= 0.85 genehmigen" (Bulk-Approve).
- API-Wrapper in api.js fuer alle 6 neuen Endpoints + erweiterte listSources-Filter.
- Backend-Endpoint POST /api/sources/classification/bulk-approve (Admin-only).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/static/js/app.js

@@ -2702,6 +2702,12 @@ async handleRefresh() {
     async openSourceManagement() {
         openModal('modal-sources');
         await this.loadSources();
+        // Admin sieht den Review-Tab
+        const reviewTab = document.getElementById('sources-tab-review');
+        if (reviewTab && this.user && this.user.role === 'org_admin') {
+            reviewTab.style.display = '';
+            this._refreshReviewBadge().catch(() => {});
+        }
     },
 
     async loadSources() {
@@ -2722,6 +2728,112 @@ async handleRefresh() {
         }
     },
 
+    async _refreshReviewBadge() {
+        try {
+            const stats = await API.getClassificationStats();
+            const badge = document.getElementById('sources-review-count');
+            if (badge) badge.textContent = String(stats.pending_review || 0);
+        } catch (_) { /* still ok */ }
+    },
+
+    switchSourcesTab(tab) {
+        const listView = document.getElementById('sources-list-view');
+        const reviewView = document.getElementById('sources-review-view');
+        const tabList = document.getElementById('sources-tab-list');
+        const tabReview = document.getElementById('sources-tab-review');
+        if (!listView || !reviewView) return;
+        if (tab === 'review') {
+            listView.style.display = 'none';
+            reviewView.style.display = '';
+            if (tabList) { tabList.classList.remove('active'); tabList.setAttribute('aria-selected', 'false'); }
+            if (tabReview) { tabReview.classList.add('active'); tabReview.setAttribute('aria-selected', 'true'); }
+            this.loadClassificationQueue();
+        } else {
+            listView.style.display = '';
+            reviewView.style.display = 'none';
+            if (tabList) { tabList.classList.add('active'); tabList.setAttribute('aria-selected', 'true'); }
+            if (tabReview) { tabReview.classList.remove('active'); tabReview.setAttribute('aria-selected', 'false'); }
+        }
+    },
+
+    async loadClassificationQueue() {
+        const list = document.getElementById('sources-review-list');
+        if (!list) return;
+        const minConf = parseFloat(document.getElementById('review-min-confidence')?.value || '0');
+        list.innerHTML = '<div class="empty-state-text" style="padding:var(--sp-3xl);text-align:center;">Lade...</div>';
+        try {
+            const items = await API.getClassificationQueue(200, minConf);
+            this._reviewItems = items;
+            const countEl = document.getElementById('review-pending-count');
+            if (countEl) countEl.textContent = String(items.length);
+            if (items.length === 0) {
+                list.innerHTML = '<div class="empty-state-text" style="padding:var(--sp-3xl);text-align:center;">Keine ausstehenden Vorschlaege.</div>';
+                return;
+            }
+            list.innerHTML = items.map(item => UI.renderClassificationQueueItem(item)).join('');
+        } catch (err) {
+            list.innerHTML = `<div class="empty-state-text" style="padding:var(--sp-3xl);text-align:center;color:var(--danger);">Fehler: ${err.message}</div>`;
+        }
+    },
+
+    async approveClassification(id) {
+        try {
+            await API.approveClassification(id);
+            UI.showToast('Klassifikation uebernommen.', 'success');
+            await this.loadClassificationQueue();
+            this._refreshReviewBadge();
+        } catch (err) {
+            UI.showToast('Approve fehlgeschlagen: ' + err.message, 'error');
+        }
+    },
+
+    async rejectClassification(id) {
+        try {
+            await API.rejectClassification(id);
+            UI.showToast('Vorschlag verworfen.', 'success');
+            await this.loadClassificationQueue();
+            this._refreshReviewBadge();
+        } catch (err) {
+            UI.showToast('Reject fehlgeschlagen: ' + err.message, 'error');
+        }
+    },
+
+    async reclassifySource(id) {
+        const btn = document.querySelector(`[data-reclassify-id="${id}"]`);
+        if (btn) { btn.disabled = true; btn.textContent = '...'; }
+        try {
+            await API.reclassifySource(id);
+            UI.showToast('Neu klassifiziert.', 'success');
+            await this.loadClassificationQueue();
+        } catch (err) {
+            UI.showToast('Reclassify fehlgeschlagen: ' + err.message, 'error');
+        } finally {
+            if (btn) { btn.disabled = false; btn.textContent = 'Neu klassifizieren'; }
+        }
+    },
+
+    async triggerBulkClassify() {
+        if (!confirm('Bulk-Klassifikation aller noch nicht klassifizierten Quellen starten? Lauft im Hintergrund (~3-5 Sek pro Quelle, ~0.02 USD pro Quelle).')) return;
+        try {
+            const r = await API.triggerBulkClassify(500, true);
+            UI.showToast(`Bulk-Klassifikation gestartet (limit=${r.limit}). Nachschauen mit Reload.`, 'info');
+        } catch (err) {
+            UI.showToast('Start fehlgeschlagen: ' + err.message, 'error');
+        }
+    },
+
+    async bulkApproveHighConfidence() {
+        if (!confirm('Alle Vorschlaege mit Konfidenz >= 0.85 genehmigen?')) return;
+        try {
+            const r = await API.bulkApproveClassifications(0.85);
+            UI.showToast(`${r.approved_count} Vorschlaege uebernommen.`, 'success');
+            await this.loadClassificationQueue();
+            this._refreshReviewBadge();
+        } catch (err) {
+            UI.showToast('Bulk-Approve fehlgeschlagen: ' + err.message, 'error');
+        }
+    },
+
     renderSourceStats(stats) {
         const bar = document.getElementById('sources-stats-bar');
         if (!bar) return;