增加ai配置和ai广场功能

go/models/init.go

@@ -148,6 +148,10 @@ func Init(_ string) {
 		new(ErpFundBill),
 		new(ErpFundSettle),
 		new(BackendAiProvider),
+		// 平台级 AI 服务商配置（docs/sql/create_platform_ai_provider.sql）
+		new(PlatformAiProvider),
+		new(PlatformAiChatSession),
+		new(PlatformAiChatMessage),
 		new(BackendAiChatSession),
 		new(BackendAiChatMessage),
 		new(BackendAiChatPreset),

go/models/platform_ai_chat.go

@@ -0,0 +1,30 @@
+package models
+
+import "time"
+
+// PlatformAiChatSession 平台 AI Playground 会话
+type PlatformAiChatSession struct {
+	ID         uint64     `orm:"column(id);pk;auto" json:"id"`
+	Title      string     `orm:"column(title);size(100)" json:"title"`
+	ProviderID uint64     `orm:"column(provider_id)" json:"provider_id"`
+	Model      string     `orm:"column(model);size(100)" json:"model"`
+	IsTop      int8       `orm:"column(is_top);default(0)" json:"is_top"` // 1-置顶
+	CreateTime time.Time  `orm:"column(create_time);auto_now_add;type(datetime)" json:"create_time"`
+	UpdateTime time.Time  `orm:"column(update_time);auto_now;type(datetime)" json:"update_time"`
+	DeleteTime *time.Time `orm:"column(delete_time);type(datetime);null" json:"delete_time"`
+}
+
+func (m *PlatformAiChatSession) TableName() string { return "yz_platform_ai_chat_session" }
+
+// PlatformAiChatMessage 平台 AI 会话消息
+type PlatformAiChatMessage struct {
+	ID         uint64    `orm:"column(id);pk;auto" json:"id"`
+	SessionID  uint64    `orm:"column(session_id)" json:"session_id"`
+	Role       string    `orm:"column(role);size(20)" json:"role"`
+	Content    string    `orm:"column(content);type(text)" json:"content"` // user 存原始 content JSON（含附件）；assistant 存纯文本
+	Think      string    `orm:"column(think);type(text)" json:"think"`     // assistant 思考过程
+	Seq        int       `orm:"column(seq)" json:"seq"`
+	CreateTime time.Time `orm:"column(create_time);auto_now_add;type(datetime)" json:"create_time"`
+}
+
+func (m *PlatformAiChatMessage) TableName() string { return "yz_platform_ai_chat_message" }

go/models/platform_ai_provider.go

@@ -0,0 +1,34 @@
+package models
+
+import "time"
+
+// AiModelItem 模型条目：模型 ID + 展示名称
+type AiModelItem struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}
+
+// PlatformAiProvider 平台级 AI 服务商配置（DeepSeek / 豆包 / Codex 等）
+// 表：yz_platform_ai_provider，建表 SQL 见 docs/sql/create_platform_ai_provider.sql
+type PlatformAiProvider struct {
+	ID           uint64     `orm:"column(id);pk;auto" json:"id"`
+	ProviderType string     `orm:"column(provider_type);size(30)" json:"provider_type"` // 预设分类：deepseek / doubao / codex / custom
+	ApiType      string     `orm:"column(api_type);size(30)" json:"api_type"`           // 协议类型：chat_completions / responses / anthropic
+	Name         string     `orm:"column(name);size(100)" json:"name"`
+	ApiBase      string     `orm:"column(api_base);size(255)" json:"api_base"`
+	ApiKey       string     `orm:"column(api_key);size(500)" json:"-"` // 不回传前端
+	ApiKeyMasked string     `orm:"-" json:"api_key_masked"`            // 回显掩码，如 sk-***abcd
+	Models       string     `orm:"column(models);type(text)" json:"-"` // JSON数组
+	ModelsList   []AiModelItem `orm:"-" json:"models"`
+	DefaultModel string     `orm:"column(default_model);size(255)" json:"default_model"`
+	IsDefault    int8       `orm:"column(is_default);default(0)" json:"is_default"`
+	Status       int8       `orm:"column(status);default(1)" json:"status"` // 0-禁用 1-启用
+	Remark       string     `orm:"column(remark);size(255)" json:"remark"`
+	CreateTime   time.Time  `orm:"column(create_time);auto_now_add;type(datetime)" json:"create_time"`
+	UpdateTime   time.Time  `orm:"column(update_time);auto_now;type(datetime)" json:"update_time"`
+	DeleteTime   *time.Time `orm:"column(delete_time);type(datetime);null" json:"delete_time"`
+}
+
+func (m *PlatformAiProvider) TableName() string {
+	return "yz_platform_ai_provider"
+}