Dexi Desktop UI readability patch v0.1.15

Apply over your full Dexi Desktop portable folder that already contains the runtime engine and model files.

Changes:
- Fixes the clipped helper text under the link-code area.
- Makes helper text bolder and slightly larger for easier reading.
- Keeps the transparent logo glass theme.
- Keeps collapsible sections, larger chat boxes, and uniform blue pill buttons.
- Keeps link code hidden by default.
