Add smart ACK provider for WeChat MP replies

Replace fixed ackText with a rule-based AckProvider that picks
response templates by message type and intent (translate, summary,
rewrite, poster, ppt, mindmap, code, search, schedule). Pure sync,
zero I/O, auto-falls back to config.ackText on any error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/.releaseignore-prod

@@ -0,0 +1,24 @@
+.git
+.gitignore
+.DS_Store
+.env
+.h5.pid
+.plaza.pid
+.claude
+.local
+.codex-backups
+MindSpace
+data
+users
+.tailscale
+node_modules
+ops/node_modules
+dist
+ops/dist
+temp
+logs
+*.log
+h5.log
+h5-prod.log
+server.mjs.bak-*
+*.bak-20*