feat(agents): SSE-Endpoint + Agent-Test-Tab (5-URL parallel)

Backend:
- specialist_agent_routes.py: GET /agents, POST /test/start (run_id),
  GET /test/stream/{run_id} (SSE), GET /run/{run_id}/result,
  GET /run/{run_id}/artifacts, GET /run/{run_id}/artifact/{path},
  DELETE /run/{run_id}, GET /runs.
- Per-URL async orchestrator: text fetch via consent-tester
  dsi-discovery → agent.evaluate() → vault.put_json + stream events.
- Tests: 7/7 grün.

Frontend:
- /api/sdk/v1/specialist-agent proxy mit SSE-passthrough.
- AgentTestTab.tsx: Agent-Wähler + 5 URL-Slots + Live-Events +
  Speedometer (OK/N-A/HIGH/MEDIUM/LOW) + Findings + Recommendations +
  Eskalations-Log + Artefakt-Link pro Slot.
- Neuer Tab "Agent-Test" in /sdk/agent.

User-Wunsch 2026-06-08: pro Agent isoliert testen, 5 URLs gleichzeitig,
Live-Updates statt Polling-Wartespiel.

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

admin-compliance/app/sdk/agent/page.tsx

@@ -5,13 +5,15 @@ import { ScanResult } from './_components/ScanResult'
 import { ComplianceCheckTab } from './_components/ComplianceCheckTab'
 import { BannerCheckTab } from './_components/BannerCheckTab'
 import { ComplianceFAQ } from './_components/ComplianceFAQ'
+import { AgentTestTab } from './_components/AgentTestTab'
 
-type AnalysisTab = 'scan' | 'compliance-check' | 'banner-check'
+type AnalysisTab = 'scan' | 'compliance-check' | 'banner-check' | 'agent-test'
 
 const TABS: { id: AnalysisTab; label: string; desc: string }[] = [
   { id: 'scan', label: 'Website-Scan', desc: 'Rechtliche Dokumente finden + Dienstleister erkennen' },
   { id: 'compliance-check', label: 'Compliance-Check', desc: 'Alle rechtlichen Dokumente zusammen pruefen' },
   { id: 'banner-check', label: 'Banner-Check', desc: 'Cookie-Banner auf DSGVO-Konformitaet testen' },
+  { id: 'agent-test', label: 'Agent-Test', desc: 'Specialist-Agent gegen 5 URLs isoliert testen' },
 ]
 
 export default function AgentPage() {
@@ -186,6 +188,7 @@ export default function AgentPage() {
 
       {tab === 'compliance-check' && <ComplianceCheckTab />}
       {tab === 'banner-check' && <BannerCheckTab />}
+      {tab === 'agent-test' && <AgentTestTab />}
 
       <ComplianceFAQ />
     </div>