fix: stabilize local folder AI document workflow

- scope local-folder PageTree revision and document sidebar rendering to fileTreeScope

- preserve projected table/image attrs for local Markdown aggregate fallback

- avoid FileTree restore forced layouts on cold design open

- add API ChatOnly provider runtime and local OCR task handling regressions

scripts/task522-page-aggregate-compat-fallback-contract.js

@@ -28,6 +28,10 @@ function paragraphText(doc) {
   return doc?.content?.[0]?.content?.[0]?.text || "";
 }
 
+function firstTableCellText(doc) {
+  return doc?.content?.[0]?.content?.[0]?.content?.[0]?.content?.[0]?.content?.[0]?.text || "";
+}
+
 const {
   pageBodyTiptapDocumentSource,
   pageBodyTiptapDocument,
@@ -62,6 +66,39 @@ assert.equal(
   "Block truth",
 );
 
+const localWithProjectedTable = {
+  projectionSource: "local_markdown.content",
+  blockDocument: {
+    documentId: "local-md:design~2F07-ai~2Fdone~2F7-45-chatonly-api-provider-runtime-v1.md",
+    rootBlockIds: ["table-1"],
+    blocks: [{
+      blockId: "table-1",
+      type: "table",
+      attrs: {
+        tiptapTable: {
+          type: "table",
+          content: [{
+            type: "tableRow",
+            content: [{
+              type: "tableCell",
+              attrs: { colspan: 1, rowspan: 1, colwidth: null },
+              content: [{
+                type: "paragraph",
+                content: [{ type: "text", text: "Provider 类别" }],
+              }],
+            }],
+          }],
+        },
+      },
+      contentNodes: [],
+    }],
+  },
+};
+assert.equal(
+  firstTableCellText(pageBodyTiptapDocument(localWithProjectedTable)),
+  "Provider 类别",
+);
+
 const localLegacyOnly = {
   projectionSource: "local_markdown.content",
   content: legacyContent,