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/ChatView.tsx

@@ -211,6 +211,7 @@ export function ChatView({
     openRecharge,
     openSubscribe,
     uploadChatImage,
+    uploadChatAttachment,
   } = useChat();
   const online = useNetworkStatus();
   const [sidebarOpen, setSidebarOpen] = useState(false);
@@ -543,7 +544,12 @@ export function ChatView({
           onSubmit={(text, imageUrls, previewImageUrls, options) =>
             void submit(
               text,
-              { messageId: options?.messageId, forceDeepReasoning: options?.forceDeepReasoning },
+              {
+                messageId: options?.messageId,
+                forceDeepReasoning: options?.forceDeepReasoning,
+                selectedChatSkill: options?.selectedChatSkill,
+                fileAttachments: options?.fileAttachments,
+              },
               imageUrls,
               previewImageUrls,
             )
@@ -551,6 +557,9 @@ export function ChatView({
           onUploadImage={(file, onProgress, options) =>
             uploadChatImage(file, onProgress, { messageId: options?.messageId })
           }
+          onUploadFile={(file, onProgress, options) =>
+            uploadChatAttachment(file, onProgress, { messageId: options?.messageId })
+          }
           onLoadOlderMessages={loadOlderMessages}
           onStop={stop}
           onApproveTool={approveTool}