feat(v2/approvals): per-card titles and structured options

Approval cards now carry a required title (Add MCP Request, Install
Packages Request, Rebuild Request, Credentials Request) and structured
options with distinct pre-click label, post-click selectedLabel (e.g.
"✅ Approved" / "❌ Rejected"), and value used for click routing. The
title and normalized options are persisted in pending_questions so the
post-click card edit can render the correct per-type title and selected
label on both chat-sdk channels and Discord interactions.

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

docs/v2-agent-runner-details.md

@@ -512,8 +512,9 @@ Send an interactive question and wait for the user's response. This is a **block
 {
   name: 'ask_user_question',
   params: {
+    title: string,         // short card title, e.g. "Confirm deletion"
     question: string,
-    options: string[],     // button labels
+    options: (string | { label: string; selectedLabel?: string; value?: string })[],
     timeout?: number,      // seconds (default: 300)
   }
 }