feat(css): SCSS foundation with Bootstrap 5.3.7 source, new dark navy theme, Inter font
- Add AspNetCore.SassCompiler v1.101.0 (MSBuild-only, no hosted service)
- Vendor Bootstrap 5.3.7 SCSS source into Styles/bootstrap/
- Create _variables.scss with adjustable accent, dark navy palette
- Create _gradients.scss with aggressive gradient mixins
- Create _custom.scss (scrollbar, validation, shared sortable, fonts)
- Wire up sasscompiler.json for Debug expanded / Release compressed
- Replace Helvetica with Inter (Google Fonts CDN)
- Delete all precompiled Bootstrap CSS (lib/css/*) - keep JS
- Delete MilkyShot.css, Milky.styles.css, app.css (now SCSS-compiled)
- Update MilkStream.csproj - remove CSS None entries, keep JS entries
- 0 errors, 0 warnings build
REDCODE
7686f04023