feat: complete tree shell cutover and regression coverage

wolai-frontend/src/lib/sidebar-data.test.ts

@@ -221,11 +221,32 @@ describe("buildSidebarInitialData", () => {
             nodeId: "doc_1",
             parentNodeId: null,
             nodeType: "page",
+            projectionKind: "sidebar_tree",
             title: "页面 1",
             depth: 0,
             position: 1,
             childCount: 0,
+            expandable: false,
             expandedByDefault: true,
+            capabilities: [
+              "open",
+              "drag",
+              "drop",
+              "select",
+              "create-child",
+              "rename",
+              "archive",
+              "restore",
+              "context-menu",
+              "reorder",
+            ],
+            resourceMeta: {
+              resourceKind: "document",
+              documentId: "doc_1",
+              workspaceId: "ws_1",
+              iconHint: "page",
+            },
+            iconHint: "page",
           },
         ],
         edges: [],
@@ -276,11 +297,32 @@ describe("buildSidebarInitialData", () => {
             nodeId: "doc_1",
             parentNodeId: null,
             nodeType: "page",
+            projectionKind: "sidebar_tree",
             title: "页面 1",
             depth: 0,
             position: 1,
             childCount: 0,
+            expandable: false,
             expandedByDefault: true,
+            capabilities: [
+              "open",
+              "drag",
+              "drop",
+              "select",
+              "create-child",
+              "rename",
+              "archive",
+              "restore",
+              "context-menu",
+              "reorder",
+            ],
+            resourceMeta: {
+              resourceKind: "document",
+              documentId: "doc_1",
+              workspaceId: "ws_1",
+              iconHint: "page",
+            },
+            iconHint: "page",
           },
         ],
         edges: [],
@@ -319,7 +361,7 @@ describe("buildSidebarInitialData", () => {
     });
   });
 
-  it("缺少 kernel projection 时不再本地补真相，而是返回空契约 projection", () => {
+  it("缺少 kernel projection 时会按 documents 重建 projection 并保留层级", () => {
     expect(
       mapSidebarDatasetListQueryResultToInitialData({
         active_workspace_id: "ws_1",
@@ -337,6 +379,18 @@ describe("buildSidebarInitialData", () => {
             created_at: "2026-04-14T00:00:00Z",
             updated_at: null,
           },
+          {
+            id: "doc_2",
+            workspace_id: "ws_1",
+            title: "页面 2",
+            parent_id: "doc_1",
+            sort_order: 0,
+            is_starred: false,
+            access_scope: "private",
+            is_template: false,
+            created_at: "2026-04-14T00:01:00Z",
+            updated_at: null,
+          },
         ],
         trashed_documents: [],
         media_assets: [],
@@ -351,13 +405,16 @@ describe("buildSidebarInitialData", () => {
     ).toMatchObject({
       activeWorkspaceId: "ws_1",
       kernelSidebarProjection: {
-        projectionId: "kernel_projection:sidebar_tree:missing",
-        items: [],
-        edges: [],
+        projectionId: "kernel_projection:sidebar_tree:workspace_root",
       },
       kernelSidebarTree: [
         {
           id: "doc_1",
+          children: [
+            {
+              id: "doc_2",
+            },
+          ],
         },
       ],
     });