feat(ui): support question tool requests

Add question queue hydration, inline answering UI, and unify pending requests with permissions.

packages/ui/src/components/tool-call/renderers/question.tsx

@@ -0,0 +1,17 @@
+import type { ToolRenderer } from "../types"
+
+export const questionRenderer: ToolRenderer = {
+  tools: ["question"],
+  getAction: () => "Awaiting answers...",
+  getTitle({ toolState }) {
+    const state = toolState()
+    if (!state) return "Questions"
+    if (state.status === "completed") return "Questions"
+    return "Asking questions"
+  },
+  renderBody() {
+    // The question tool UI is rendered by ToolCall itself so
+    // it can share the same layout for pending/completed.
+    return null
+  },
+}