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/components/SpaceChatPanel.tsx

@@ -50,6 +50,7 @@ export function SpaceChatPanel({
     dismissNotice,
     openRecharge,
     uploadChatImage,
+    uploadChatAttachment,
     retryConnect,
   } = chat;
   const { capabilities, grantedSkills } = mainChat;
@@ -142,7 +143,12 @@ export function SpaceChatPanel({
           chatBridge
             ? void submit(
                 text,
-                { ...context, messageId: options?.messageId, forceDeepReasoning: options?.forceDeepReasoning },
+                {
+                  ...context,
+                  messageId: options?.messageId,
+                  forceDeepReasoning: options?.forceDeepReasoning,
+                  fileAttachments: options?.fileAttachments,
+                },
                 imageUrls,
                 previewImageUrls,
               )
@@ -152,6 +158,7 @@ export function SpaceChatPanel({
                   mindspaceContext: context,
                   messageId: options?.messageId,
                   forceDeepReasoning: options?.forceDeepReasoning,
+                  fileAttachments: options?.fileAttachments,
                 },
                 imageUrls,
                 previewImageUrls,
@@ -160,6 +167,9 @@ export function SpaceChatPanel({
         onUploadImage={(file, onProgress, options) =>
           uploadChatImage(file, onProgress, { messageId: options?.messageId })
         }
+        onUploadFile={(file, onProgress, options) =>
+          uploadChatAttachment(file, onProgress, { messageId: options?.messageId })
+        }
         onStop={stop}
         onApproveTool={approveTool}
         onPageSaved={onPageSaved}