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/css/style.css

@@ -3503,6 +3503,204 @@ a.dev-source-pill:hover {
     color: var(--info);
 }
 
+/* Sources-Modal: Tabs */
+.sources-tabs {
+    display: flex;
+    gap: 2px;
+    border-bottom: 1px solid var(--border-color, rgba(0,0,0,0.1));
+    margin-bottom: 12px;
+}
+.sources-tab {
+    background: transparent;
+    border: none;
+    padding: 8px 16px;
+    font-size: 13px;
+    font-weight: 500;
+    color: var(--text-secondary, #555);
+    cursor: pointer;
+    border-bottom: 2px solid transparent;
+    margin-bottom: -1px;
+    display: inline-flex;
+    align-items: center;
+    gap: 8px;
+}
+.sources-tab:hover {
+    color: var(--text-primary, #222);
+}
+.sources-tab.active {
+    color: var(--primary, #2a81cb);
+    border-bottom-color: var(--primary, #2a81cb);
+}
+.sources-tab-badge {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    min-width: 20px;
+    padding: 0 6px;
+    height: 18px;
+    border-radius: 9px;
+    background: var(--primary, #2a81cb);
+    color: #fff;
+    font-size: 10px;
+    font-weight: 700;
+}
+
+/* Review-Queue */
+.review-toolbar {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 8px 12px;
+    background: var(--cat-sonstige-bg, #f6f6fa);
+    border-radius: var(--radius);
+    margin-bottom: 12px;
+    flex-wrap: wrap;
+    gap: 12px;
+}
+.review-toolbar-info {
+    display: flex;
+    align-items: center;
+    gap: 16px;
+    font-size: 13px;
+}
+.review-conf-filter {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 12px;
+    color: var(--text-secondary, #555);
+}
+.review-conf-filter select {
+    padding: 2px 6px;
+    font-size: 12px;
+    border-radius: var(--radius);
+    border: 1px solid var(--border-color, rgba(0,0,0,0.15));
+}
+.review-toolbar-actions {
+    display: flex;
+    gap: 6px;
+}
+
+.review-list {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+}
+.review-card {
+    background: var(--surface, #fff);
+    border: 1px solid var(--border-color, rgba(0,0,0,0.08));
+    border-radius: var(--radius);
+    padding: 12px 14px;
+}
+.review-card-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: flex-start;
+    gap: 12px;
+    margin-bottom: 10px;
+}
+.review-card-title {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    gap: 8px;
+}
+.review-card-name {
+    font-weight: 600;
+    font-size: 14px;
+}
+.review-card-domain {
+    font-size: 11px;
+    color: var(--text-disabled, #888);
+}
+.review-global-badge {
+    display: inline-flex;
+    align-items: center;
+    padding: 1px 6px;
+    border-radius: var(--radius);
+    background: #5e35b1;
+    color: #fff;
+    font-size: 9px;
+    font-weight: 600;
+    letter-spacing: 0.3px;
+    text-transform: uppercase;
+}
+.review-card-confidence {
+    display: inline-flex;
+    flex-direction: column;
+    align-items: center;
+    padding: 4px 10px;
+    border-radius: var(--radius);
+    min-width: 60px;
+}
+.review-card-confidence .conf-value {
+    font-size: 14px;
+    font-weight: 700;
+}
+.review-card-confidence .conf-label {
+    font-size: 9px;
+    text-transform: uppercase;
+    letter-spacing: 0.3px;
+    opacity: 0.8;
+}
+.review-card-confidence.conf-high { background: #e8f5e9; color: #2e7d32; }
+.review-card-confidence.conf-medium { background: #fff8e1; color: #ef6c00; }
+.review-card-confidence.conf-low { background: #ffebee; color: #c62828; }
+
+.review-card-diff {
+    display: grid;
+    grid-template-columns: 1fr;
+    gap: 4px;
+    font-size: 12px;
+    margin-bottom: 10px;
+}
+.review-diff-row {
+    display: grid;
+    grid-template-columns: 110px 1fr 24px 1fr;
+    align-items: center;
+    gap: 8px;
+    padding: 3px 6px;
+    border-radius: 3px;
+}
+.review-diff-row.changed {
+    background: #fff8e1;
+}
+.review-diff-label {
+    color: var(--text-secondary, #555);
+    font-weight: 500;
+}
+.review-diff-current {
+    color: var(--text-disabled, #888);
+}
+.review-diff-arrow {
+    text-align: center;
+    color: var(--text-disabled, #888);
+    font-weight: 600;
+}
+.review-diff-proposed {
+    color: var(--text-primary, #222);
+    font-weight: 500;
+}
+.review-diff-row.changed .review-diff-proposed {
+    color: #ef6c00;
+    font-weight: 600;
+}
+
+.review-card-reasoning {
+    font-size: 12px;
+    color: var(--text-secondary, #555);
+    background: var(--cat-sonstige-bg, #f6f6fa);
+    padding: 8px 10px;
+    border-radius: var(--radius);
+    margin-bottom: 10px;
+    line-height: 1.5;
+}
+.review-card-actions {
+    display: flex;
+    gap: 6px;
+    flex-wrap: wrap;
+}
+
 /* Klassifikations-Badges (politisch / reliability / alignments / state) */
 .source-classification-badges {
     display: inline-flex;