feat: chat uploads, vision turn isolation, and MindSpace agent improvements

Add chat file/image upload UX, attachment proxying, vision thumbnails, and per-turn image scoping so agents only use the current upload. Extend MindSpace asset context, billing token state, OA/scenario verify scripts, and related runtime config.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/types.ts

@@ -22,6 +22,13 @@ export type MessageContent =
       };
     };
 
+export type ChatFileAttachment = {
+  assetId: string;
+  downloadUrl: string;
+  filename: string;
+  mimeType: string;
+};
+
 export type Message = {
   id?: string | null;
   role: Role;
@@ -33,6 +40,9 @@ export type Message = {
     displayText?: string;
     imageUrls?: string[];
     previewImageUrls?: string[];
+    archivedImageUrls?: string[];
+    archivedPreviewImageUrls?: string[];
+    fileAttachments?: ChatFileAttachment[];
   };
 };
 
@@ -424,6 +434,7 @@ export type MindSpaceAsset = {
   hasThumbnail?: boolean;
   publicUrl?: string | null;
   sourcePageId?: string | null;
+  workspaceRelativePath?: string | null;
   createdAt: number;
   updatedAt: number;
 };
@@ -796,6 +807,8 @@ export type MindSpacePage = {
   visibility: 'private' | 'internal' | 'public';
   publicationAccessMode?: 'public' | 'password' | 'private_link' | 'time_limited' | 'login_required' | 'owner_only' | null;
   publicationUrl?: string | null;
+  workspaceRelativePath?: string | null;
+  workspacePublicUrl?: string | null;
   currentVersionId: string;
   versionNo: number;
   content?: string;