Dexi Desktop UI patch v0.1.14

Updates:
- Replaces the header logo with a transparent-background PNG so it blends into the dark/glass app header.
- Keeps the v0.1.13 rounded glass cards, collapsible sections, larger chat boxes, and uniform blue pill buttons.
- Keeps the link code hidden by default.

Apply this patch over the root of your full Dexi Desktop portable folder, then run START-HERE-DEXI-DESKTOP.bat.
