diff --git a/src/server/index.ts b/src/server/index.ts
index 6d6aef6..379cec3 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -1803,7 +1803,9 @@ app.get('/src/i18n/*', serveStatic({ root: '.' }))
 
 // Admin HTML components - read file text explicitly to force Content-Length
 app.get('/admin/*', async (c) => {
-  const filePath = `./public${c.req.path}`
+  const path = c.req.path
+  // If path ends with /, it's a directory → serve admin SPA
+  const filePath = path.endsWith('/') ? './public/admin.html' : `./public${path}`
   const file = Bun.file(filePath)
   const text = await file.text()
   c.header('Content-Length', String(Buffer.byteLength(text, 'utf8')))