refactor(admin): split industry-templates page.tsx into colocated components

Split 879-LOC page.tsx into 187 LOC with 11 colocated components,
_types.ts and _constants.ts for the industry templates module.
Behavior preserved.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/app/sdk/industry-templates/_components/ErrorPanel.tsx

@@ -0,0 +1,19 @@
+export function ErrorPanel({ message, onRetry }: { message: string; onRetry: () => void }) {
+  return (
+    <div className="bg-red-50 border border-red-200 rounded-xl p-5 flex items-start gap-3">
+      <svg className="w-5 h-5 text-red-500 flex-shrink-0 mt-0.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+      </svg>
+      <div className="flex-1">
+        <p className="text-red-700 font-medium">Fehler</p>
+        <p className="text-red-600 text-sm mt-1">{message}</p>
+      </div>
+      <button
+        onClick={onRetry}
+        className="px-4 py-1.5 text-sm font-medium text-red-700 bg-red-100 hover:bg-red-200 rounded-lg transition-colors"
+      >
+        Erneut versuchen
+      </button>
+    </div>
+  )
+}