fix(client): review fixes for invocation rendering and turn boundaries

The user-turn predicate (opensUserTurn) unifies the three parallel
consumers a new node kind silently missed — produced-files turn reset,
retry liveness, own-words force-scroll — so a skill invocation behaves as
the turn opener it is. The menu marker resolves through ctx.locale.bind
instead of a hand-rolled snapshot lookup; the dead legacy <skill> render
arm goes with the removal cut; command-over-skill name precedence is now
documented at the matchEnter seam; and the emptied replacement catalog
keeps the no-reload sentence, with the never-published residual recorded
in the Agent Note.

packages/client/ui-skill/tests/browser-plugin.spec.ts

@@ -53,7 +53,8 @@ function providePresentation(ctx: Context): PresentationCapture {
       capture.dictionaries.push({ namespace, dictionaries })
       return () => { capture.localeDisposed = true }
     },
-    getSnapshot: () => ({ active: 'zh', locales: ['zh', 'en'], revision: 0 }),
+    // Minimal bound-translate fake: zh dictionary lookup, key passthrough on miss.
+    bind: () => (key: string) => key === 'menu.userOnly' ? '仅用户' : key,
   })
   return capture
 }