fix: poll for containers after route transition animation

Sidebar Right now polls every 100ms (up to 1s) for containers to
appear, instead of a single 200ms retry that missed animations.

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

neode-ui/src/composables/useControllerNav.ts

@@ -415,12 +415,19 @@ export function useControllerNav(containerRef?: { value: HTMLElement | null }) {
         if (dest) {
           focusEl(dest)
         } else {
-          // Containers may not be rendered yet (async load after route change)
-          // Retry after a short delay
-          setTimeout(() => {
+          // Containers not rendered yet (route transition / animation in progress)
+          // Poll until they appear, up to 1s
+          let attempts = 0
+          const poll = setInterval(() => {
+            attempts++
             const retryContainers = getContainers()
-            if (retryContainers[0]) focusEl(retryContainers[0])
-          }, 200)
+            if (retryContainers[0]) {
+              clearInterval(poll)
+              focusEl(retryContainers[0])
+            } else if (attempts >= 10) {
+              clearInterval(poll)
+            }
+          }, 100)
         }
         return
       }