fix(import+screening): GET-Alias, DELETE-Endpoint, ehrlicher Scan-Status

Import-Backend:
- GET /v1/import (Root-Alias) → list_documents; behebt URL-Mismatch im Proxy
- DELETE /v1/import/{document_id} → löscht Dokument + Gap-Analyse (mit Tenant-Isolierung)
- 6 neue Tests (65 total, alle grün)

Screening-Frontend:
- Simulierten Fortschrittsbalken (Math.random) entfernt — war inhaltlich falsch
- Ersetzt durch indeterminate Spinner + rotierende ehrliche Status-Texte
  (z.B. "OSV.dev Datenbank wird abgefragt...") im 2-Sek.-Takt
- Kein scanProgress-State mehr benötigt

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

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

@@ -8,38 +8,18 @@ import { useSDK, ScreeningResult, SecurityIssue, SBOMComponent, BacklogItem } fr
 // COMPONENTS
 // =============================================================================
 
-function ScanProgress({ progress, status }: { progress: number; status: string }) {
+function ScanProgress({ status }: { status: string }) {
   return (
     <div className="bg-white rounded-xl border border-gray-200 p-6">
       <div className="flex items-center gap-4">
-        <div className="relative w-16 h-16">
-          <svg className="w-16 h-16 transform -rotate-90">
-            <circle cx="32" cy="32" r="28" stroke="#e5e7eb" strokeWidth="4" fill="none" />
-            <circle
-              cx="32"
-              cy="32"
-              r="28"
-              stroke="#9333ea"
-              strokeWidth="4"
-              fill="none"
-              strokeDasharray={`${progress * 1.76} 176`}
-              strokeLinecap="round"
-            />
-          </svg>
-          <span className="absolute inset-0 flex items-center justify-center text-sm font-bold text-gray-900">
-            {progress}%
-          </span>
-        </div>
+        <div className="w-10 h-10 border-4 border-gray-200 border-t-purple-600 rounded-full animate-spin flex-shrink-0" />
         <div>
-          <h3 className="font-semibold text-gray-900">Scanning...</h3>
+          <h3 className="font-semibold text-gray-900">Scan läuft...</h3>
           <p className="text-sm text-gray-500">{status}</p>
         </div>
       </div>
-      <div className="mt-4 h-2 bg-gray-100 rounded-full overflow-hidden">
-        <div
-          className="h-full bg-purple-600 rounded-full transition-all duration-500"
-          style={{ width: `${progress}%` }}
-        />
+      <div className="mt-4 h-1.5 bg-gray-100 rounded-full overflow-hidden">
+        <div className="h-full bg-purple-600 rounded-full animate-pulse w-full" />
       </div>
     </div>
   )
@@ -166,7 +146,6 @@ export default function ScreeningPage() {
   const { state, dispatch } = useSDK()
   const router = useRouter()
   const [isScanning, setIsScanning] = useState(false)
-  const [scanProgress, setScanProgress] = useState(0)
   const [scanStatus, setScanStatus] = useState('')
   const [scanError, setScanError] = useState<string | null>(null)
   const [scanHistory, setScanHistory] = useState<any[]>([])
@@ -214,27 +193,22 @@ export default function ScreeningPage() {
 
   const startScan = async (file: File) => {
     setIsScanning(true)
-    setScanProgress(0)
-    setScanStatus('Initialisierung...')
+    setScanStatus('Abhängigkeiten werden analysiert...')
     setScanError(null)
 
-    // Show progress steps while API processes
-    const progressInterval = setInterval(() => {
-      setScanProgress(prev => {
-        if (prev >= 90) return prev
-        const step = Math.random() * 15 + 5
-        const next = Math.min(prev + step, 90)
-        const statuses = [
-          'Abhaengigkeiten werden analysiert...',
-          'SBOM wird generiert...',
-          'Schwachstellenscan laeuft...',
-          'OSV.dev Datenbank wird abgefragt...',
-          'Lizenzpruefung...',
-        ]
-        setScanStatus(statuses[Math.min(Math.floor(next / 20), statuses.length - 1)])
-        return next
-      })
-    }, 600)
+    // Rotate through honest status messages while backend processes
+    const statusMessages = [
+      'Abhängigkeiten werden analysiert...',
+      'SBOM wird generiert...',
+      'Schwachstellenscan läuft...',
+      'OSV.dev Datenbank wird abgefragt...',
+      'Lizenzprüfung...',
+    ]
+    let statusIdx = 0
+    const statusInterval = setInterval(() => {
+      statusIdx = (statusIdx + 1) % statusMessages.length
+      setScanStatus(statusMessages[statusIdx])
+    }, 2000)
 
     try {
       const formData = new FormData()
@@ -246,7 +220,7 @@ export default function ScreeningPage() {
         body: formData,
       })
 
-      clearInterval(progressInterval)
+      clearInterval(statusInterval)
 
       if (!response.ok) {
         const err = await response.json().catch(() => ({ error: 'Unknown error' }))
@@ -255,7 +229,6 @@ export default function ScreeningPage() {
 
       const data = await response.json()
 
-      setScanProgress(100)
       setScanStatus('Abgeschlossen!')
 
       // Map backend response to ScreeningResult
@@ -308,10 +281,9 @@ export default function ScreeningPage() {
         dispatch({ type: 'ADD_SECURITY_ISSUE', payload: issue })
       })
     } catch (error: any) {
-      clearInterval(progressInterval)
+      clearInterval(statusInterval)
       console.error('Screening scan failed:', error)
       setScanError(error.message || 'Scan fehlgeschlagen')
-      setScanProgress(0)
       setScanStatus('')
     } finally {
       setIsScanning(false)
@@ -369,7 +341,7 @@ export default function ScreeningPage() {
       )}
 
       {/* Scan Progress */}
-      {isScanning && <ScanProgress progress={scanProgress} status={scanStatus} />}
+      {isScanning && <ScanProgress status={scanStatus} />}
 
       {/* Results */}
       {state.screening && state.screening.status === 'COMPLETED' && (