### Check for duplicates - [ ] I have searched for similar issues before opening a new one. ### Component The trashcan icon is broken in the shared backpack demo. ### Description Expected trashcan icon, but icon was broken. ### Reproduction steps 1. Go to [backpack-demo/index.html](https://google.github.io/blockly-samples/examples/backpack-demo/index.html). 2. Observe broken trashcan icon. ### Stack trace ```shell ``` ### Screenshots <img width="1295" height="854" alt="Image" src="https://github.com/user-attachments/assets/9929fbf2-af87-40a0-9683-40b94fb963a3" />