feat: add admin disclosures page for reviewing data access requests

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

frontend/src/pages/DisclosuresPage.tsx

@@ -0,0 +1,94 @@
+import { useState, useEffect } from 'react'
+import { Check, X } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
+import { Badge } from '@/components/ui/badge'
+import { Skeleton } from '@/components/ui/skeleton'
+import type { DisclosureRequest } from '@/types'
+import { getDisclosureRequests, reviewDisclosure } from '@/services/disclosureService'
+
+export function DisclosuresPage() {
+  const [requests, setRequests] = useState<DisclosureRequest[]>([])
+  const [loading, setLoading] = useState(true)
+
+  const load = () => {
+    setLoading(true)
+    getDisclosureRequests('pending')
+      .then(setRequests)
+      .catch(() => setRequests([]))
+      .finally(() => setLoading(false))
+  }
+
+  useEffect(() => { load() }, [])
+
+  const handleReview = async (id: number, status: 'approved' | 'rejected') => {
+    try {
+      await reviewDisclosure(id, status)
+      load()
+    } catch {
+      // Silently reload on error
+      load()
+    }
+  }
+
+  return (
+    <div className="p-6 space-y-4">
+      <h1 className="text-2xl font-bold">Freigabe-Anfragen</h1>
+
+      {loading ? (
+        <div className="space-y-2">
+          {[1, 2, 3].map((i) => (
+            <Skeleton key={i} className="h-24 w-full" />
+          ))}
+        </div>
+      ) : requests.length === 0 ? (
+        <p className="text-muted-foreground">Keine offenen Anfragen.</p>
+      ) : (
+        <div className="space-y-3">
+          {requests.map((dr) => (
+            <Card key={dr.id}>
+              <CardHeader className="pb-2">
+                <div className="flex items-center justify-between">
+                  <CardTitle className="text-base">
+                    Fall {dr.fall_id || dr.case_id}
+                  </CardTitle>
+                  <Badge variant="outline">{dr.status}</Badge>
+                </div>
+              </CardHeader>
+              <CardContent className="space-y-2">
+                <p className="text-sm">
+                  <span className="text-muted-foreground">Angefragt von:</span>{' '}
+                  {dr.requester_username || `User #${dr.requester_id}`}
+                </p>
+                <p className="text-sm">
+                  <span className="text-muted-foreground">Begründung:</span>{' '}
+                  {dr.reason}
+                </p>
+                <p className="text-xs text-muted-foreground">
+                  {new Date(dr.created_at).toLocaleString('de-DE')}
+                </p>
+                <div className="flex gap-2 pt-1">
+                  <Button
+                    size="sm"
+                    onClick={() => handleReview(dr.id, 'approved')}
+                  >
+                    <Check className="size-4 mr-1" />
+                    Genehmigen
+                  </Button>
+                  <Button
+                    size="sm"
+                    variant="destructive"
+                    onClick={() => handleReview(dr.id, 'rejected')}
+                  >
+                    <X className="size-4 mr-1" />
+                    Ablehnen
+                  </Button>
+                </div>
+              </CardContent>
+            </Card>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}