feat: expand local operator controls across CLI and WebUI

- Add structured CLI commands for status/kernel/settings/plugins/memory/knowledge/agents
- Inject core dependencies directly into CLI plugin for non-HTTP operator workflows
- Add plugin management panel and API proxy endpoints to WebUI
- Let cmd_run inherit default workdir from core.agent.workdir
- Use fixed loopback address for pluginmgr API
- Remove stale MaxToolTurns config usage from homed wiring

internal/plugins/pluginmgr/plugin.go

@@ -22,7 +22,7 @@ import (
 var (
 	PluginDir string          // 由 main.go 设置
 	Reg       *plugin.Registry // 由 main.go 设置
-	HTTPAddr  = "127.0.0.1:0" // 监听地址，可被 main.go 覆写
+	HTTPAddr  = "127.0.0.1:9876" // 监听地址，可被 main.go 覆写或 settings 配置
 )
 
 func init() {