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/readtools/graph_executor.go

@@ -18,7 +18,7 @@ import (
 
 func ExecuteGraphTool(ctx context.Context, conversation models.Conversation, toolCode string, arguments map[string]any, policy aitooling.Policy) (aitooling.Definition, string, error) {
 	toolCode = toolx.NormalizeToolCodeAlias(strings.TrimSpace(toolCode))
-	if toolCode != toolx.GraphTriageServiceRequest.Code && toolCode != toolx.GraphAnalyzeConversation.Code && toolCode != toolx.GraphPrepareTicketDraft.Code {
+	if toolCode != toolx.GraphTriageServiceRequest.Code && toolCode != toolx.GraphAnalyzeConversation.Code {
 		return aitooling.Definition{}, "", fmt.Errorf("tool is not a graph read tool")
 	}
 	definition, err := aitooling.DefaultRegistry.Resolve(toolCode)
@@ -48,10 +48,8 @@ func ExecuteGraphTool(ctx context.Context, conversation models.Conversation, too
 	case toolx.GraphAnalyzeConversation.Code:
 		result, err := graphs.NewAnalyzeConversationGraph(conversation).Run(ctx, string(data))
 		return definition, result, err
-	default:
-		result, err := graphs.NewPrepareTicketDraftGraph(conversation).Run(ctx, string(data))
-		return definition, result, err
 	}
+	return definition, "", fmt.Errorf("tool is not a graph read tool")
 }
 
 // RetrieveKnowledge executes the built-in knowledge tool after the same
@@ -61,7 +59,7 @@ func RetrieveKnowledge(ctx context.Context, agent models.AIAgent, knowledgeBaseI
 	if err != nil {
 		return aitooling.Definition{}, nil, err
 	}
-	arguments := map[string]any{"query": strings.TrimSpace(query), "knowledgeBaseIds": knowledgeBaseIDs}
+	arguments := map[string]any{"query": strings.TrimSpace(query), "knowledge_base_ids": knowledgeBaseIDs}
 	if err := aitooling.DefaultPolicyGuard.Authorize(aitooling.Invocation{
 		Definition: definition,
 		Arguments:  arguments,

internal/ai/runtime/readtools/graph_executor_test.go

@@ -11,9 +11,9 @@ import (
 
 func TestExecuteGraphToolRejectsDisallowedToolBeforeGraphExecution(t *testing.T) {
 	definition, _, err := ExecuteGraphTool(context.Background(), models.Conversation{}, toolx.GraphAnalyzeConversation.Code, map[string]any{
-		"observedIssue": "需要分析的问题",
+		"observed_issue": "需要分析的问题",
 	}, aitooling.Policy{
-		AllowedToolCodes:  []string{toolx.GraphPrepareTicketDraft.Code},
+		AllowedToolCodes:  []string{toolx.GraphTriageServiceRequest.Code},
 		AllowedRiskLevels: []string{aitooling.RiskLevelRead},
 		Confirmed:         true,
 	})