dev 分支暂存

backend/ai-core/internal/model/memory.go

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+package model
+
+import "time"
+
+// MemoryPriority 记忆优先级
+type MemoryPriority int
+
+const (
+	MemoryTemp     MemoryPriority = 0 // 临时记忆 (会话内)
+	MemoryNormal   MemoryPriority = 1 // 普通记忆
+	MemoryImportant MemoryPriority = 2 // 重要记忆
+	MemoryCore     MemoryPriority = 3 // 核心记忆 (永远保留)
+)
+
+// String 返回优先级的中文描述
+func (p MemoryPriority) String() string {
+	switch p {
+	case MemoryCore:
+		return "核心"
+	case MemoryImportant:
+		return "重要"
+	case MemoryNormal:
+		return "普通"
+	case MemoryTemp:
+		return "临时"
+	default:
+		return "未知"
+	}
+}
+
+// MemoryCategory 记忆分类
+type MemoryCategory string
+
+const (
+	CategoryPreference  MemoryCategory = "preference"   // 喜好/偏好
+	CategoryFact        MemoryCategory = "fact"         // 事实信息
+	CategoryEvent       MemoryCategory = "event"        // 事件/经历
+	CategoryRelationship MemoryCategory = "relationship" // 关系/情感
+	CategoryHabit       MemoryCategory = "habit"        // 习惯
+	CategoryOther       MemoryCategory = "other"        // 其他
+)
+
+// MemoryEntry 记忆条目
+type MemoryEntry struct {
+	ID        string          `json:"id" db:"id"`
+	UserID    string          `json:"user_id" db:"user_id"`
+	Content   string          `json:"content" db:"content"`
+	Summary   string          `json:"summary" db:"summary"`   // 简短摘要
+	Category  MemoryCategory  `json:"category" db:"category"`
+	Priority  MemoryPriority  `json:"priority" db:"priority"`
+	SessionID string          `json:"session_id" db:"session_id"` // 来源会话
+	Source    string          `json:"source" db:"source"`         // 来源文本片断
+	Embedding []float32       `json:"-" db:"embedding"`           // 向量 (pgvector)
+	AccessCount int           `json:"access_count" db:"access_count"`
+	LastAccess  time.Time     `json:"last_access" db:"last_access"`
+	CreatedAt   time.Time     `json:"created_at" db:"created_at"`
+	ExpiresAt   *time.Time    `json:"expires_at,omitempty" db:"expires_at"` // 临时记忆过期时间
+}
+
+// MemoryQuery 记忆查询参数
+type MemoryQuery struct {
+	UserID   string
+	Query    string   // 查询文本
+	Category MemoryCategory
+	Priority MemoryPriority
+	Limit    int
+	Offset   int
+}

backend/ai-core/internal/model/message.go

@@ -0,0 +1,54 @@
+package model
+
+import "time"
+
+// Role 消息角色
+type Role string
+
+const (
+	RoleSystem    Role = "system"
+	RoleUser      Role = "user"
+	RoleAssistant Role = "assistant"
+	RoleTool      Role = "tool"
+)
+
+// LLMMessage 发送给LLM的消息
+type LLMMessage struct {
+	Role       Role   `json:"role"`
+	Content    string `json:"content"`
+	Name       string `json:"name,omitempty"`        // 可选发送者名称
+	ToolCallID string `json:"tool_call_id,omitempty"` // 工具调用关联ID
+}
+
+// ChatMessage 数据库存储的对话消息
+type ChatMessage struct {
+	ID        string    `json:"id" db:"id"`
+	SessionID string    `json:"session_id" db:"session_id"`
+	UserID    string    `json:"user_id" db:"user_id"`
+	Role      Role      `json:"role" db:"role"`
+	Content   string    `json:"content" db:"content"`
+	Mode      string    `json:"mode" db:"mode"` // text | voice_msg | voice_assistant
+	CreatedAt time.Time `json:"created_at" db:"created_at"`
+}
+
+// LLMResponse LLM返回的响应
+type LLMResponse struct {
+	Content      string      `json:"content"`
+	FinishReason string      `json:"finish_reason"` // stop | length | tool_calls
+	ToolCalls    []ToolCall  `json:"tool_calls,omitempty"`
+	Usage        Usage       `json:"usage,omitempty"`
+}
+
+// ToolCall 工具调用
+type ToolCall struct {
+	ID        string `json:"id"`
+	Name      string `json:"name"`
+	Arguments string `json:"arguments"`
+}
+
+// Usage token用量统计
+type Usage struct {
+	PromptTokens     int `json:"prompt_tokens"`
+	CompletionTokens int `json:"completion_tokens"`
+	TotalTokens      int `json:"total_tokens"`
+}

backend/ai-core/internal/model/session.go

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+package model
+
+import "time"
+
+// Session 对话会话
+type Session struct {
+	ID          string    `json:"id" db:"id"`
+	UserID      string    `json:"user_id" db:"user_id"`
+	Title       string    `json:"title" db:"title"`
+	Persona     string    `json:"persona" db:"persona"` // cyrene | ...
+	Mode        string    `json:"mode" db:"mode"`       // text | voice_assistant
+	MessageCount int      `json:"message_count" db:"message_count"`
+	IsActive    bool      `json:"is_active" db:"is_active"`
+	CreatedAt   time.Time `json:"created_at" db:"created_at"`
+	UpdatedAt   time.Time `json:"updated_at" db:"updated_at"`
+}
+
+// SessionCreateParams 创建会话参数
+type SessionCreateParams struct {
+	UserID  string `json:"user_id"`
+	Title   string `json:"title"`
+	Persona string `json:"persona"`
+	Mode    string `json:"mode"`
+}