fix: correct page directory casing for case-sensitive filesystems

Rename admin/ → Admin/ and swagger/ → Swagger/ to match router imports.
Windows is case-insensitive so the mismatch was invisible locally.

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

ui/src/pages/Swagger/SwaggerPage.tsx

@@ -0,0 +1,29 @@
+import { useEffect, useRef } from 'react';
+import { config } from '../../config';
+
+export default function SwaggerPage() {
+  const containerRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    let cleanup: (() => void) | undefined;
+
+    import('swagger-ui-dist/swagger-ui-bundle').then(({ default: SwaggerUIBundle }) => {
+      if (!containerRef.current) return;
+      SwaggerUIBundle({
+        url: `${config.apiBaseUrl}/api-docs`,
+        domNode: containerRef.current,
+        presets: [],
+        layout: 'BaseLayout',
+      });
+    });
+
+    return () => cleanup?.();
+  }, []);
+
+  return (
+    <div>
+      <h2 style={{ marginBottom: '1rem' }}>API Documentation</h2>
+      <div ref={containerRef} />
+    </div>
+  );
+}