fix(ipx): ensure leading slash is added to ipx url

Author: pi0

src/runtime/ipx.ts

@@ -1,5 +1,6 @@
 import { fileURLToPath } from 'node:url'
 import { createIPX, createIPXMiddleware } from 'ipx'
+import { withLeadingSlash } from 'ufo'
 import { eventHandler, lazyEventHandler } from 'h3'
 import { useRuntimeConfig } from '#imports'
 
@@ -14,7 +15,7 @@ export default lazyEventHandler(() => {
   const middleware = createIPXMiddleware(ipx)
 
   return eventHandler(async (event) => {
-    event.req.url = event.context.params._
+    event.req.url = withLeadingSlash(event.context.params._)
     await middleware(event.req, event.res)
   })
 })