🎨 Palette: WebUI/UX Enhancement

[tryigit]

As requested, I found and fixed a micro-UX flaw in the CleveresTricky WebUI.

The toast notification overlay (.island-container) correctly uses pointer-events: none; to ensure it doesn't block background clicks on the page, but the close button (.island-close) previously did not explicitly declare pointer-events: auto;. This inherited the parent's none styling, making the button unclickable and causing click events to be swallowed.

By injecting pointer-events: auto; into the .island-close class in WebServer.kt, the button can now be properly tapped on mobile without breaking the background's clickability.

Tested successfully locally using the provided test suites.

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PR created automatically by Jules for task 10531736750236563628 started by @tryigit

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