Merge pull request 'Add pinned and archived flags to Conversation (R1)' (#4) from feature/task-sidebar-r1 into main

model.go

@@ -31,6 +31,8 @@ type Conversation struct {
 	Owner     ID           `json:"owner,omitempty"` // 冗余自项目，查询过滤用
 	Title     string       `json:"title"`
 	ProfileID ID           `json:"profileId,omitempty"` // 空为默认画像
+	Pinned    bool         `json:"pinned,omitempty"`    // 侧栏置顶（方案 A P6/P8：本端组织偏好，服务端权威）
+	Archived  bool         `json:"archived,omitempty"`  // 归档：列表默认隐藏，数据保留
 	CreatedAt time.Time    `json:"createdAt"`
 	UpdatedAt time.Time    `json:"updatedAt"`
 }

ts/types.ts

@@ -13,6 +13,7 @@ export interface Project {
 
 export interface Conversation {
   id: ID; projectId: ID; owner?: ID; title: string; profileId?: ID;
+  pinned?: boolean; archived?: boolean;
   createdAt: string; updatedAt: string;
 }