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/services/agent_run_service_test.go

@@ -17,25 +17,23 @@ import (
 	"gorm.io/gorm/schema"
 )
 
-func TestAgentRunServiceFindsWorkflowAuditDetail(t *testing.T) {
+func TestAgentRunServiceFindsAuditDetail(t *testing.T) {
 	db := setupAgentRunServiceTestDB(t)
 	now := time.Now()
 	endedAt := now.Add(time.Second)
 	run := &models.AgentRun{
 		ConversationID: 11,
 		AIAgentID:      12,
-		WorkflowRunID:  13,
-
-		Status:    "completed",
-		StartedAt: now,
-		EndedAt:   &endedAt,
-		CreatedAt: now,
-		UpdatedAt: now,
+		Status:         "completed",
+		StartedAt:      now,
+		EndedAt:        &endedAt,
+		CreatedAt:      now,
+		UpdatedAt:      now,
 	}
 	if err := db.Create(run).Error; err != nil {
 		t.Fatalf("create agent run: %v", err)
 	}
-	if err := db.Create(&models.AgentStep{AgentRunID: run.ID, StepType: "workflow", Status: "completed", StartedAt: now, EndedAt: &endedAt, CreatedAt: now}).Error; err != nil {
+	if err := db.Create(&models.AgentStep{AgentRunID: run.ID, StepType: "tool", Status: "completed", StartedAt: now, EndedAt: &endedAt, CreatedAt: now}).Error; err != nil {
 		t.Fatalf("create agent step: %v", err)
 	}
 	if err := db.Create(&models.AgentToolCall{AgentRunID: run.ID, ToolCode: "knowledge.retrieve", Status: "completed", CreatedAt: now}).Error; err != nil {
@@ -75,26 +73,30 @@ func TestAgentRunServiceRecordsAgentLoopToolCall(t *testing.T) {
 	}
 }
 
-func TestAgentRunServiceRecordsResumedToolCall(t *testing.T) {
+func TestAgentRunServiceRecallsLatestBusinessToolResultPerConversation(t *testing.T) {
 	db := setupAgentRunServiceTestDB(t)
 	now := time.Now()
-	run := &models.AgentRun{Status: "interrupted", StartedAt: now, CreatedAt: now, UpdatedAt: now}
-	if err := db.Create(run).Error; err != nil {
-		t.Fatalf("create interrupted run: %v", err)
+	runs := []models.AgentRun{
+		{ConversationID: 21, Status: "completed", StartedAt: now, CreatedAt: now, UpdatedAt: now},
+		{ConversationID: 21, Status: "completed", StartedAt: now.Add(time.Second), CreatedAt: now, UpdatedAt: now},
+		{ConversationID: 22, Status: "completed", StartedAt: now, CreatedAt: now, UpdatedAt: now},
 	}
-	err := AgentRunService.RecordResume(db, run.ID, 0, "completed", "操作已执行", &AgentLoopToolCallInput{
-		ToolCode: "crm/update_customer", RiskLevel: "write", RequireConfirm: true,
-		Status: "completed", ArgumentsPreview: `{"name":"Ada"}`, ResultPreview: "updated",
-	})
-	if err != nil {
-		t.Fatalf("RecordResume returned error: %v", err)
+	if err := db.Create(&runs).Error; err != nil {
+		t.Fatalf("create runs: %v", err)
 	}
-	item, steps, toolCalls := AgentRunService.GetDetail(run.ID)
-	if item == nil || item.Status != "completed" || len(steps) != 1 || steps[0].StepType != "resume" {
-		t.Fatalf("unexpected resumed run audit: item=%#v steps=%#v", item, steps)
+	calls := []models.AgentToolCall{
+		{AgentRunID: runs[0].ID, ToolCode: "business/card_package_catalog", Status: "completed", ResultPreview: `[{"sequence":1,"current_start_at":"old"}]`, CreatedAt: now},
+		{AgentRunID: runs[1].ID, ToolCode: "business/card_package_catalog", Status: "completed", ResultPreview: `[{"sequence":1,"current_start_at":"new"}]`, CreatedAt: now},
+		{AgentRunID: runs[1].ID, ToolCode: "builtin/conversation_context", Status: "completed", ResultPreview: "ignore", CreatedAt: now},
+		{AgentRunID: runs[1].ID, ToolCode: "business/card_auto_renewal_catalog", Status: "completed", ResultPreview: "stale", CreatedAt: now.Add(-20 * time.Minute)},
+		{AgentRunID: runs[2].ID, ToolCode: "business/card_package_catalog", Status: "completed", ResultPreview: "other conversation", CreatedAt: now},
 	}
-	if len(toolCalls) != 1 || toolCalls[0].AgentStepID != steps[0].ID || !toolCalls[0].RequireConfirm || toolCalls[0].Status != "completed" {
-		t.Fatalf("unexpected resumed tool audit: %#v", toolCalls)
+	if err := db.Create(&calls).Error; err != nil {
+		t.Fatalf("create calls: %v", err)
+	}
+	memory := AgentRunService.FindRecentBusinessToolMemory(21, 4)
+	if len(memory) != 1 || memory[0].ToolCode != "business/card_package_catalog" || !strings.Contains(memory[0].Result, "new") {
+		t.Fatalf("unexpected business memory: %#v", memory)
 	}
 }