Quellen-Health UI: Tab, API-Endpunkte, Vorschläge

- Neuer Sub-Tab "Quellen-Health" mit Vorschlägen + Check-Ergebnissen
- API: GET /health, GET /suggestions, PUT /suggestions/{id}, POST /health/run
- Vorschläge annehmen/ablehnen mit Auto-Ausführung
- Badge-Styles für Health-Status und Prioritäten
- Umlaute in Source-Modal und Dashboard korrigiert

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/static/css/style.css

@@ -651,3 +651,55 @@ tr:hover td {
   line-height: 1.6;
   margin-bottom: 8px;
 }
+
+
+/* --- Health & Suggestion Badges --- */
+.badge-health-error {
+  background: rgba(239, 68, 68, 0.2);
+  color: #fca5a5;
+}
+
+.badge-health-warning {
+  background: rgba(245, 158, 11, 0.2);
+  color: #fcd34d;
+}
+
+.badge-health-ok {
+  background: rgba(34, 197, 94, 0.2);
+  color: #86efac;
+}
+
+.badge-suggestion-add_source {
+  background: rgba(59, 130, 246, 0.2);
+  color: #93c5fd;
+}
+
+.badge-suggestion-deactivate_source {
+  background: rgba(245, 158, 11, 0.2);
+  color: #fcd34d;
+}
+
+.badge-suggestion-remove_source {
+  background: rgba(239, 68, 68, 0.2);
+  color: #fca5a5;
+}
+
+.badge-suggestion-fix_url {
+  background: rgba(168, 85, 247, 0.2);
+  color: #d8b4fe;
+}
+
+.badge-priority-high {
+  background: rgba(239, 68, 68, 0.2);
+  color: #fca5a5;
+}
+
+.badge-priority-medium {
+  background: rgba(245, 158, 11, 0.2);
+  color: #fcd34d;
+}
+
+.badge-priority-low {
+  background: rgba(100, 116, 139, 0.2);
+  color: #94a3b8;
+}