feat: 插件-工具合并 — 创建 pkg/plugins 共享模块并移除 tool-engine

- 新增 backend/pkg/plugins/ 共享模块：SDK 接口、PluginManager、ToolRegistry（含环形缓冲区调用日志）
- 13 个通用插件从 plugin-manager 迁移至共享模块（import 路径统一）
- ai-core 切换至共享 ToolRegistry，进程内执行（零网络开销），包装 6 个专属工具
- plugin-manager 迁移至共享模块，保留管理 REST API
- 新增 DevTools 插件管理面板（侧边栏 → 🔌 插件管理）
- 移除 tool-engine 服务（从 go.work、DevTools 配置、编译系统）
- 工具调用记录 API 从 Tool-Engine 迁至 AI-Core（/api/v1/tools/calls）
- ai-core ContextStore 启动时从 PostgreSQL 恢复会话历史
- 清理所有过时引用和备份文件

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/gateway/internal/router/router.go

@@ -15,7 +15,7 @@ import (
 )
 
 // Setup 注册所有路由
-func Setup(r *gin.Engine, hub *ws.Hub, cfg *config.Config, sessionStore *store.SessionStore, reminderStore *store.ReminderStore, briefingStore *store.BriefingStore, automationStore *store.AutomationStore, fileStore *store.FileStore, ruleEngine *engine.RuleEngine, knowledgeStore *store.KnowledgeStore, imageHandler *handler.ImageHandler, db interface{}, modelConfigStore *config.ModelsConfigStore) {
+func Setup(r *gin.Engine, hub *ws.Hub, cfg *config.Config, sessionStore *store.SessionStore, reminderStore *store.ReminderStore, briefingStore *store.BriefingStore, automationStore *store.AutomationStore, fileStore *store.FileStore, ruleEngine *engine.RuleEngine, knowledgeStore *store.KnowledgeStore, imageHandler *handler.ImageHandler, db interface{}, modelConfigStore *config.ModelsConfigStore, thinkingScheduleStore *config.ThinkingScheduleStore) {
 	// 限流器
 	rateLimiter := middleware.NewRateLimiter(10, 20) // 每秒10个请求，突发20
 
@@ -37,6 +37,7 @@ func Setup(r *gin.Engine, hub *ws.Hub, cfg *config.Config, sessionStore *store.S
 	automationHandler := handler.NewAutomationHandler(automationStore, ruleEngine)
 	knowledgeHandler := handler.NewKnowledgeHandler(knowledgeStore, fileStore)
 	modelConfigHandler := handler.NewModelConfigHandler(modelConfigStore)
+	thinkingScheduleHandler := handler.NewThinkingScheduleHandler(thinkingScheduleStore)
 	if imageHandler == nil {
 		imageHandler = handler.NewImageHandler(cfg, fileStore)
 	}
@@ -226,6 +227,13 @@ func Setup(r *gin.Engine, hub *ws.Hub, cfg *config.Config, sessionStore *store.S
 				models.POST("/health-check", modelConfigHandler.TestProvider)
 				models.GET("/fetch-models/:name", modelConfigHandler.ProxyListModels)
 			}
+
+			// 思考调度配置
+			thinkingSchedule := admin.Group("/thinking-schedule")
+			{
+				thinkingSchedule.GET("", thinkingScheduleHandler.GetSchedule)
+				thinkingSchedule.PUT("", thinkingScheduleHandler.SetSchedule)
+			}
 		}
 	}