Project Tree View, Prompt Input Expansion, and Node Editing Improvements

· Update

1. New project tree view for managing complex projects

Click the lower-left corner to expand the project tree view.

2. Node generation prompt input supports expansion

3. New nodes reuse the previous model and parameters by default

When creating a new node, the selected model and parameters are selected from the last-used settings by default.

4. Copying nodes can retain input-node connections

Ctrl+V: paste the node only.

Ctrl+Shift+V: paste the node together with the original input-node connection.

5. Optimized real-time credit balance feedback

Credit balance feedback has been optimized so creators can understand usage in time.