feat(cursor): wire executor through portal, admin, and wechat routes

Register cursor in LLM executor bindings, route page/code tasks through
cursor runtime selection, and bootstrap wechat cursor policy services.

Co-authored-by: Cursor <cursoragent@cursor.com>

wechat/handlers/page-generate.mjs

@@ -47,6 +47,7 @@ export function resolvePageGenerateOutcome({
   replyHasPublicLinks = false,
   topic = '',
   repairContext = {},
+  wechatCursorChannel = false,
 }) {
   const context = {
     topic: String(topic || repairContext.topic || '').trim(),
@@ -64,6 +65,17 @@ export function resolvePageGenerateOutcome({
     return { action: 'send', artifacts: sendable };
   }
 
+  if (wechatCursorChannel) {
+    const cursorCandidates = selectSendableHtmlArtifacts({
+      verifiedArtifacts,
+      confirmedArtifacts,
+      publishDir: context.publishDir,
+    }).filter((artifact) => verifyPageArtifactContent(artifact, previewOptions).ok);
+    if (cursorCandidates.length > 0) {
+      return { action: 'send', artifacts: cursorCandidates };
+    }
+  }
+
   if (
     suspiciousPublishClaim ||
     bareCompletionReply ||