完善图片画布素材库持久化

新增账号级素材文件夹和素材表，并接入 SpacetimeDB procedure、spacetime-client facade 与 api-server BFF。

编辑器素材栏支持文件夹新建、折叠、重命名、删除、多文件上传、拖拽定向上传、框选和批量删除。

画布支持拖拽上传落点创建图层、图层打组、小地图拖拽、普通滚轮纵向滚动和 Ctrl 滚轮缩放。

更新图片画布技术方案、后端数据契约、TRACKING 和团队决策记录。

server-rs/crates/spacetime-client/src/mapper.rs

@@ -43,8 +43,11 @@ pub use self::combat::{
     ResolveCombatActionRecord,
 };
 pub use self::editor_project::{
-    EditorCanvasRecord, EditorCanvasViewportRecord, EditorProjectCreateRecordInput,
-    EditorProjectDeleteRecordInput, EditorProjectGetRecordInput,
+    EditorAssetCreateRecordInput, EditorAssetDeleteRecordInput, EditorAssetFolderCreateRecordInput,
+    EditorAssetFolderDeleteRecordInput, EditorAssetFolderRecord, EditorAssetFolderUpdateRecordInput,
+    EditorAssetLibraryRecord, EditorAssetRecord, EditorAssetUpdateRecordInput, EditorCanvasRecord,
+    EditorCanvasViewportRecord, EditorProjectCreateRecordInput, EditorProjectDeleteRecordInput,
+    EditorProjectGetRecordInput,
     EditorProjectLayoutSaveRecordInput, EditorProjectRecord, EditorProjectRenameRecordInput,
     EditorProjectResourceCreateRecordInput, EditorProjectResourceRecord,
 };
@@ -194,9 +197,11 @@ pub(crate) use self::custom_world::{
     parse_rpg_agent_stage_record,
 };
 pub(crate) use self::editor_project::{
-    map_editor_project_delete_procedure_result, map_editor_project_list_procedure_result,
-    map_editor_project_optional_procedure_result, map_editor_project_required_procedure_result,
-    map_editor_project_resource_procedure_result,
+    map_editor_asset_folder_library_procedure_result,
+    map_editor_asset_folder_procedure_result, map_editor_asset_library_procedure_result,
+    map_editor_asset_procedure_result, map_editor_project_delete_procedure_result,
+    map_editor_project_list_procedure_result, map_editor_project_optional_procedure_result,
+    map_editor_project_required_procedure_result, map_editor_project_resource_procedure_result,
 };
 pub(crate) use self::external_generation::{
     map_external_generation_job_claim_result, map_external_generation_job_procedure_result,