feat: 更新 Server 后端服务

- 更新 agent handler 和 service 层
- 新增 chat_group handler 和 service
- 删除废弃的 chat_handler
- 更新 tool 相关处理
- 更新 API 文档和依赖

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/internal/repository/agent_repo.go

@@ -39,6 +39,13 @@ func (r *AgentRepository) FindAll() ([]model.Agent, error) {
 	return agents, err
 }
 
+// FindByIDs 根据多个ID查询
+func (r *AgentRepository) FindByIDs(ids []string) ([]model.Agent, error) {
+	var agents []model.Agent
+	err := r.db.Where("id IN ?", ids).Find(&agents).Error
+	return agents, err
+}
+
 func (r *AgentRepository) Update(agent *model.Agent) error {
 	return r.db.Save(agent).Error
 }
@@ -101,6 +108,103 @@ func (r *AgentRepository) DeleteMemory(id string) error {
 	return r.db.Delete(&model.AgentMemory{}, "id = ?", id).Error
 }
 
+// FindMemories 通用查询记忆，支持分类和类型过滤
+func (r *AgentRepository) FindMemories(agentID, userID, category, memoryType string, limit, offset int) ([]model.AgentMemory, int64, error) {
+	var memories []model.AgentMemory
+	query := r.db.Model(&model.AgentMemory{})
+
+	if agentID != "" {
+		query = query.Where("agent_id = ?", agentID)
+	}
+	if userID != "" {
+		query = query.Where("user_id = ?", userID)
+	}
+	if category != "" {
+		query = query.Where("category = ?", category)
+	}
+	if memoryType != "" {
+		query = query.Where("memory_type = ?", memoryType)
+	}
+
+	// 统计总数
+	var total int64
+	countQuery := query
+	if err := countQuery.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	// 置顶的记忆优先，然后按重要性降序，最后按创建时间降序
+	err := query.Order("is_pinned DESC, importance DESC, created_at DESC").Limit(limit).Offset(offset).Find(&memories).Error
+	return memories, total, err
+}
+
+// SearchMemories 搜索记忆
+func (r *AgentRepository) SearchMemories(agentID, userID, keyword, tags, category, memoryType string, minScore, limit, offset int) ([]model.AgentMemory, int64, error) {
+	var memories []model.AgentMemory
+	query := r.db.Model(&model.AgentMemory{})
+
+	if agentID != "" {
+		query = query.Where("agent_id = ?", agentID)
+	}
+	if userID != "" {
+		query = query.Where("user_id = ?", userID)
+	}
+	if keyword != "" {
+		keyword = "%" + keyword + "%"
+		query = query.Where("content LIKE ? OR keywords LIKE ? OR tags LIKE ?", keyword, keyword, keyword)
+	}
+	if category != "" {
+		query = query.Where("category = ?", category)
+	}
+	if memoryType != "" {
+		query = query.Where("memory_type = ?", memoryType)
+	}
+	if minScore > 0 {
+		query = query.Where("importance >= ?", minScore)
+	}
+
+	// 统计总数
+	var total int64
+	countQuery := query
+	if err := countQuery.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	err := query.Order("is_pinned DESC, importance DESC, created_at DESC").Limit(limit).Offset(offset).Find(&memories).Error
+	return memories, total, err
+}
+
+// FindMemoryByID 根据ID查询记忆
+func (r *AgentRepository) FindMemoryByID(id string) (*model.AgentMemory, error) {
+	var memory model.AgentMemory
+	err := r.db.Where("id = ?", id).First(&memory).Error
+	if err != nil {
+		return nil, err
+	}
+	return &memory, nil
+}
+
+// UpdateMemory 更新记忆
+func (r *AgentRepository) UpdateMemory(memory *model.AgentMemory) error {
+	return r.db.Save(memory).Error
+}
+
+// FindMemoryCategories 获取记忆分类列表
+func (r *AgentRepository) FindMemoryCategories(agentID, userID string) ([]string, error) {
+	var categories []string
+	query := r.db.Model(&model.AgentMemory{}).Distinct("category")
+
+	if agentID != "" {
+		query = query.Where("agent_id = ?", agentID)
+	}
+	if userID != "" {
+		query = query.Where("user_id = ?", userID)
+	}
+
+	err := query.Pluck("category", &categories).Error
+	return categories, err
+}
+
 // AgentTeam 相关方法
 
 func (r *AgentRepository) CreateAgentTeam(team *model.AgentTeam) error {

server/internal/repository/tool_repo.go

@@ -44,6 +44,15 @@ func (r *ToolRepository) FindByID(id string) (*model.Tool, error) {
 	return &tool, nil
 }
 
+func (r *ToolRepository) FindByName(name string) (*model.Tool, error) {
+	var tool model.Tool
+	err := r.db.First(&tool, "name = ?", name).Error
+	if err != nil {
+		return nil, err
+	}
+	return &tool, nil
+}
+
 func (r *ToolRepository) Update(tool *model.Tool) error {
 	return r.db.Save(tool).Error
 }