适配 Bailian WebParser 兼容接入并完善 sidecar 文档。

新增 WebParser 兼容工具与 MCP health/tools-sync 兼容模式，让 WebParser/sse 可注册到 agent 并暴露明确 schema；同时修复 mcp argv 环境变量展开并补齐微信 sidecar 纯本地化安装与文档说明。

Made-with: Cursor

runtime/operations/scripts/weixin_login.ps1

@@ -23,6 +23,8 @@ New-Item -ItemType Directory -Force -Path $stateDir | Out-Null
 Push-Location $sidecarRoot
 try {
   $env:OCLAW_STATE_DIR = $stateDir
+  # Ensure the official plugin stores state under the sidecar.
+  $env:OPENCLAW_STATE_DIR = $stateDir
   if (Test-Path (Join-Path $sidecarRoot "login.ts")) {
     npm.cmd exec -- tsx login.ts
     exit 0