chore: remove unused SCSS and fix component styles

- remove unused z-index and word-break SCSS utility files and their imports from src/static/scss/index.scss
- standardize padding unit notation to [px] format in ChatQuickAccess component
- reformat long class attributes and clean up whitespace in GeneratorPhotoComponent
- fix trailing whitespace and formatting for the navigateTo call in GeneratorPhotoComponent

src/static/scss/index.scss

@@ -17,10 +17,8 @@
 @import "./overflow.scss";
 @import "./scroll.scss";
 @import "./width.scss";
-@import "./z-index.scss";
 @import "./white-space.scss";
 @import "./box-sizing.scss";
-@import "./word-break.scss";
 @import "./min-height.scss";
 @import "./min-width.scss";
 @import "./gap.scss";