diff --git a/frontend/app/middleware/legacy-redirects.global.ts b/frontend/app/middleware/legacy-redirects.global.ts
new file mode 100644
index 0000000..4350559
--- /dev/null
+++ b/frontend/app/middleware/legacy-redirects.global.ts
@@ -0,0 +1,24 @@
+export default defineNuxtRouteMiddleware((to) => {
+  const redirects: Record<string, string> = {
+    '/component-catalog': '/catalogues/composants',
+    '/pieces-catalog': '/catalogues/pieces',
+    '/product-catalog': '/catalogues/produits',
+  }
+
+  // Exact path match redirects
+  const redirect = redirects[to.path]
+  if (redirect) {
+    return navigateTo({ path: redirect, query: to.query }, { redirectCode: 301 })
+  }
+
+  // Category index redirects (add tab=categories query param)
+  if (to.path === '/component-category') {
+    return navigateTo({ path: '/catalogues/composants', query: { ...to.query, tab: 'categories' } }, { redirectCode: 301 })
+  }
+  if (to.path === '/piece-category') {
+    return navigateTo({ path: '/catalogues/pieces', query: { ...to.query, tab: 'categories' } }, { redirectCode: 301 })
+  }
+  if (to.path === '/product-category') {
+    return navigateTo({ path: '/catalogues/produits', query: { ...to.query, tab: 'categories' } }, { redirectCode: 301 })
+  }
+})