feat(sdk): add RegisterStopHandler/RunStopHandlers and wire stop cleanup into registry lifecycle

- SDK PluginSDK gains RegisterStopHandler(fn func()) + RunStopHandlers()
  (LIFO, idempotent, cleared after running); synced to third_party copy
- Registry keeps per-plugin SDK refs (sdkRefs); StopAll/ReloadOne/
  DisablePlugin run handlers before calling Stop()
- timer built-in plugin demonstrates handler-based shutdown cleanup
- z_bridge (linux/windows templates) runs handlers before plugin.Stop()

internal/config/registry.go

@@ -394,7 +394,6 @@ func (r *ConfigRegistry) seedDBValues(dataDir string) {
 	set("core.memory.text", filepath.Join(dataDir, "memory", "text"))
 	set("core.memory.documents", filepath.Join(dataDir, "memory", "documents"))
 	set("core.knowledge.path", filepath.Join(dataDir, "knowledge"))
-	set("core.skills.path", filepath.Join(dataDir, "skills"))
 	set("core.log.path", filepath.Join(dataDir, "log"))
 
 	set("core.agent.max_tool_turns", "10")
@@ -488,7 +487,6 @@ func (r *ConfigRegistry) seedCoreDefs(dataDir string) {
 	reg(ConfigDef{Key: "core.memory.text", Default: filepath.Join(dataDir, "memory", "text"), Type: "string", DisplayName: "文本记忆路径", Description: "短期文本记忆存储目录", Category: "paths"})
 	reg(ConfigDef{Key: "core.memory.documents", Default: filepath.Join(dataDir, "memory", "documents"), Type: "string", DisplayName: "文档记忆路径", Description: "文档记忆存储目录", Category: "paths"})
 	reg(ConfigDef{Key: "core.knowledge.path", Default: filepath.Join(dataDir, "knowledge"), Type: "string", DisplayName: "知识库路径", Description: "知识库存储目录", Category: "paths"})
-	reg(ConfigDef{Key: "core.skills.path", Default: filepath.Join(dataDir, "skills"), Type: "string", DisplayName: "技能目录", Description: "OpenClaw 技能存储目录", Category: "paths"})
 	reg(ConfigDef{Key: "core.log.path", Default: filepath.Join(dataDir, "log"), Type: "string", DisplayName: "日志目录", Description: "日志文件输出目录", Category: "paths"})
 
 	reg(ConfigDef{Key: "core.agent.max_tool_turns", Default: "10", Type: "int", DisplayName: "最大工具轮次", Description: "单次请求允许的最大工具调用轮数", Category: "agent"})

internal/plugin/registry.go

@@ -68,6 +68,7 @@ type Registry struct {
 	factories map[string]NativeFactory
 
 	pluginAutoRestart map[string]bool
+	sdkRefs           map[string]*sdk.PluginSDK
 
 	iom       *agentIO.IOManager
 	evBus     *events.Bus
@@ -103,6 +104,7 @@ func NewRegistry() *Registry {
 		plugins:           make(map[string]sdk.Plugin),
 		factories:         make(map[string]NativeFactory),
 		pluginAutoRestart: make(map[string]bool),
+		sdkRefs:           make(map[string]*sdk.PluginSDK),
 		knownDisabled:     make(map[string]bool),
 	}
 }
@@ -378,16 +380,25 @@ func (r *Registry) loadOne(plgDir, name string) bool {
 	r.mu.Lock()
 	r.plugins[name] = plg
 	r.pluginAutoRestart[name] = plgSDK.AutoRestart()
+	r.sdkRefs[name] = plgSDK
 	r.instances = append(r.instances, plg)
 	r.mu.Unlock()
 	log.Printf("[plugin] loaded: %s", name)
 	return true
 }
 
+// runStopHandlers 执行插件注册的停止清理回调（SDK 层），须在调用插件 Stop() 之前执行。
+func (r *Registry) runStopHandlers(name string) {
+	if sdk, ok := r.sdkRefs[name]; ok {
+		sdk.RunStopHandlers()
+	}
+}
+
 func (r *Registry) StopAll() {
 	r.mu.Lock()
 	defer r.mu.Unlock()
 	for _, p := range r.instances {
+		r.runStopHandlers(p.Name())
 		if err := p.Stop(); err != nil {
 			log.Printf("[plugin] stop %s: %v", p.Name(), err)
 		}
@@ -395,6 +406,7 @@ func (r *Registry) StopAll() {
 	r.plugins = make(map[string]sdk.Plugin)
 	r.instances = nil
 	r.pluginAutoRestart = make(map[string]bool)
+	r.sdkRefs = make(map[string]*sdk.PluginSDK)
 }
 
 func (r *Registry) Reload(dir string) (string, error) {
@@ -410,10 +422,12 @@ func (r *Registry) ReloadOne(name string) error {
 
 	r.mu.Lock()
 	if p, ok := r.plugins[name]; ok {
+		r.runStopHandlers(name)
 		if err := p.Stop(); err != nil {
 			log.Printf("[plugin] stop %s for reload: %v", name, err)
 		}
 		delete(r.plugins, name)
+		delete(r.sdkRefs, name)
 		for i, inst := range r.instances {
 			if inst.Name() == name {
 				r.instances = append(r.instances[:i], r.instances[i+1:]...)
@@ -481,10 +495,12 @@ func (r *Registry) Disable(name string) error {
 	r.mu.Lock()
 	p, ok := r.plugins[name]
 	if ok {
+		r.runStopHandlers(name)
 		if err := p.Stop(); err != nil {
 			log.Printf("[plugin] stop %s for disable: %v", name, err)
 		}
 		delete(r.plugins, name)
+		delete(r.sdkRefs, name)
 		for i, inst := range r.instances {
 			if inst.Name() == name {
 				r.instances = append(r.instances[:i], r.instances[i+1:]...)
@@ -539,10 +555,12 @@ func (r *Registry) DisablePlugin(name, by string) error {
 	r.mu.Lock()
 	p, ok := r.plugins[name]
 	if ok {
+		r.runStopHandlers(name)
 		if err := p.Stop(); err != nil {
 			log.Printf("[plugin] stop %s for disable: %v", name, err)
 		}
 		delete(r.plugins, name)
+		delete(r.sdkRefs, name)
 		for i, inst := range r.instances {
 			if inst.Name() == name {
 				r.instances = append(r.instances[:i], r.instances[i+1:]...)

internal/plugins/timer/plugin.go

@@ -42,6 +42,8 @@ func (p *Plugin) Name() string { return p.name }
 func (p *Plugin) Start(s *sdk.PluginSDK) error {
 	s.SetAutoRestart(true)
 	p.maxDur = 24 * time.Hour
+	// 停止清理（取消倒计时）交由 stop handler：内核在调用 Stop() 之前执行。
+	s.RegisterStopHandler(func() { close(p.stopCh) })
 	s.Settings().RegisterDef(sdk.ConfigDef{
 		Key: "max_duration", Type: "string", DisplayName: "最大定时时长",
 		Description: "允许设置的最大定时时长，例如 24h, 7d, 1h（默认 24h）",
@@ -118,7 +120,6 @@ func (p *Plugin) Start(s *sdk.PluginSDK) error {
 }
 
 func (p *Plugin) Stop() error {
-	close(p.stopCh)
 	p.wg.Wait()
 	return nil
 }

internal/plugins/webui/dashboard.html

@@ -258,9 +258,11 @@ code { font-family:monospace; font-size:12px; color:var(--pre-color) }
   .msg { max-width:95% }
 }
 @media(max-width:768px) {
-  nav { padding:0 8px; gap:2px }
-  nav h1 { font-size:13px; margin-right:8px }
-  nav a { padding:8px 6px; font-size:11px }
+  nav { padding:0 6px; gap:2px; overflow-x:auto; scrollbar-width:none; -ms-overflow-style:none; flex-wrap:nowrap }
+  nav::-webkit-scrollbar { display:none }
+  nav h1 { font-size:0; margin-right:6px; color:var(--accent) }
+  nav a { padding:10px 8px; font-size:12px; white-space:nowrap; flex-shrink:0 }
+  nav > div { flex-shrink:0 }
   .container { padding:12px }
   .card { padding:12px }
   .grid-2,.grid-3,.grid-4 { grid-template-columns:1fr }