refactor: 将客服后端重构为宿主可嵌入模块

- 注入数据库、运行时配置、统一响应、文件存储和平台 AI 能力，补充业务读写工具与客户快捷操作契约。

- 移除模块内重复的组织、客户、工单、标签、技能、旧工作流、MCP 和迁移实现，将身份权限与业务主体交由宿主管理。

- 使用 libSQL 重构向量存储，并完善图片消息、访客身份、排队调度、企业微信和支持聊天页面。

- 统一 HTTP、DTO 与 WebSocket 的 snake_case 协议，补齐模块初始化、业务动作和公共载荷等回归测试。

internal/pkg/toolx/builtin_tools.go

@@ -103,34 +103,6 @@ var (
 		Appendix:       i18nx.Get("tool.graph.analyzeConversation.appendix"),
 		AppendixKey:    "tool.graph.analyzeConversation.appendix",
 	}
-	GraphPrepareTicketDraft = ToolSpec{
-		Code:           "graph/prepare_ticket_draft",
-		ServerCode:     "graph",
-		Name:           "prepare_ticket_draft",
-		Title:          i18nx.Get("tool.graph.prepareTicketDraft.title"),
-		TitleKey:       "tool.graph.prepareTicketDraft.title",
-		Description:    i18nx.Get("tool.graph.prepareTicketDraft.description"),
-		DescriptionKey: "tool.graph.prepareTicketDraft.description",
-		SourceType:     enums.ToolSourceTypeGraph,
-		DirectAccess:   true,
-		RuntimeStatic:  true,
-		Appendix:       i18nx.Get("tool.graph.prepareTicketDraft.appendix"),
-		AppendixKey:    "tool.graph.prepareTicketDraft.appendix",
-	}
-	GraphCreateTicketConfirm = ToolSpec{
-		Code:           "graph/create_ticket_with_confirmation",
-		ServerCode:     "graph",
-		Name:           "create_ticket_with_confirmation",
-		Title:          i18nx.Get("tool.graph.createTicketConfirm.title"),
-		TitleKey:       "tool.graph.createTicketConfirm.title",
-		Description:    i18nx.Get("tool.graph.createTicketConfirm.description"),
-		DescriptionKey: "tool.graph.createTicketConfirm.description",
-		SourceType:     enums.ToolSourceTypeGraph,
-		RuntimeStatic:  true,
-		Aliases:        []string{"builtin/create_ticket_with_confirmation"},
-		Appendix:       i18nx.Get("tool.graph.createTicketConfirm.appendix"),
-		AppendixKey:    "tool.graph.createTicketConfirm.appendix",
-	}
 	GraphHandoffConversation = ToolSpec{
 		Code:           "graph/handoff_to_human",
 		ServerCode:     "graph",
@@ -151,8 +123,6 @@ var (
 		BuiltinKnowledgeRetrieve,
 		GraphTriageServiceRequest,
 		GraphAnalyzeConversation,
-		GraphPrepareTicketDraft,
-		GraphCreateTicketConfirm,
 		GraphHandoffConversation,
 	}
 )
@@ -401,15 +371,9 @@ func IsImpliedAllowedToolCode(toolCode string, allowedToolCodes map[string]struc
 	}
 	switch toolCode {
 	case GraphTriageServiceRequest.Code, GraphAnalyzeConversation.Code:
-		if _, ok := allowedToolCodes[GraphCreateTicketConfirm.Code]; ok {
-			return true
-		}
 		if _, ok := allowedToolCodes[GraphHandoffConversation.Code]; ok {
 			return true
 		}
-	case GraphPrepareTicketDraft.Code:
-		_, ok := allowedToolCodes[GraphCreateTicketConfirm.Code]
-		return ok
 	}
 	return false
 }