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/ai/runtime/graphs/triage_service_request_graph.go

@@ -12,16 +12,14 @@ import (
 
 type TriageServiceRequestInput struct {
 	Goal              string `json:"goal"`
-	ObservedIssue     string `json:"observedIssue"`
-	NeedTicket        bool   `json:"needTicket"`
-	NeedHumanHandoff  bool   `json:"needHumanHandoff"`
-	AdditionalContext string `json:"additionalContext"`
+	ObservedIssue     string `json:"observed_issue"`
+	NeedHumanHandoff  bool   `json:"need_human_handoff"`
+	AdditionalContext string `json:"additional_context"`
 }
 
 type TriageServiceRequestResult struct {
 	Analysis          AnalyzeConversationResult `json:"analysis"`
-	TicketDraft       *PrepareTicketDraftResult `json:"ticketDraft,omitempty"`
-	RecommendedAction string                    `json:"recommendedAction"`
+	RecommendedAction string                    `json:"recommended_action"`
 	Ready             bool                      `json:"ready"`
 }
 
@@ -42,7 +40,6 @@ func (g *TriageServiceRequestGraph) Run(_ context.Context, argumentsInJSON strin
 	analysis := buildAnalyzeConversationResult(g.conversation, messages, AnalyzeConversationInput{
 		Goal:              input.Goal,
 		ObservedIssue:     input.ObservedIssue,
-		NeedTicket:        input.NeedTicket,
 		NeedHumanHandoff:  input.NeedHumanHandoff,
 		AdditionalContext: input.AdditionalContext,
 	})
@@ -51,13 +48,6 @@ func (g *TriageServiceRequestGraph) Run(_ context.Context, argumentsInJSON strin
 		RecommendedAction: analysis.RecommendedNextAction,
 		Ready:             analysis.RecommendedNextAction == "continue_answering" || analysis.RecommendedNextAction == "handoff_to_human",
 	}
-	if analysis.RecommendedNextAction == "prepare_ticket" {
-		draft := buildPrepareTicketDraftResult(g.conversation, messages, PrepareTicketDraftInput{
-			Issue: input.ObservedIssue,
-		})
-		result.TicketDraft = &draft
-		result.Ready = draft.Ready
-	}
 	buf, err := json.Marshal(result)
 	if err != nil {
 		return "", err