Previously, the script always launched a new Chrome instance, which failed
when Chrome was already running due to profile lock conflicts on macOS.
Users had to close all Chrome windows before publishing.
This change adds auto-detection of existing Chrome debug ports and reuses
an already-logged-in WeChat tab when available, falling back to launching
a new instance only when no existing Chrome is found.
Changes:
- cdp.ts: add tryConnectExisting() and findExistingChromeDebugPort()
- wechat-article.ts: try existing Chrome before launching new one,
reuse logged-in WeChat tab (identified by token= in URL),
add waitForElement() for reliable menu detection,
add --cdp-port option for manual override,
fix process not exiting after completion
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>