feat: add visibility and author_name to TreeListItem type and list API params

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

frontend/src/types/tree.ts

@@ -164,6 +164,7 @@ export interface TreeListItem {
   category_info: CategoryInfo | null
   tags: string[]
   author_id: string | null
+  author_name: string | null
   account_id: string | null
   is_active: boolean
   is_public: boolean
@@ -173,6 +174,7 @@ export interface TreeListItem {
   usage_count: number
   created_at: string
   updated_at: string
+  visibility: 'private' | 'team' | 'link' | 'public'
 }
 
 export interface TreeCreate {
@@ -215,6 +217,7 @@ export interface TreeFilters {
   is_active?: boolean
   author_id?: string
   is_public?: boolean
+  visibility?: 'private' | 'team' | 'link' | 'public'
   sort_by?: 'usage_count' | 'updated_at' | 'created_at' | 'name' | 'name_desc' | 'version'
   skip?: number
   limit?: number