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## Summary by cubic
Updates app branding to icon set v2 and switches the in-app logo to SVG
for sharper rendering.

- **Refactors**
  - Use assets/logo.svg in TitleBar instead of logo_transparent.png.
- Add assets/logo.svg; remove legacy PNGs (logo.png,
logo_transparent.png).
- Refresh platform icon files (logo.icns, logo.ico,
assets/icon/logo.png).

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