feat: complete section color coding with logo, hints, editor themes, and footers

- Add section-specific CodeMirror syntax highlighting (purple selectors for CSS)
- Logo now uses section colors (CSS purple as default, changes per section)
- Add section color coding for hints
- Add full footer to section and reference pages
- Fix nav highlight updates for sidebar and prev/next navigation
- Change welcome module mode to CSS for purple theme on first lesson
- Rebrand "Code Crispies" to "CODE CRISPIES" across all translations
- Fix scroll to top on section page navigation
- Change HTML section color to raspberry (#c75b7a)

src/config/sections.js

@@ -15,7 +15,7 @@ export const sections = {
 		id: "html",
 		title: "HTML",
 		description: "Semantic markup and native elements",
-		color: "#d4637b",
+		color: "#c75b7a",
 		order: 2
 	},
 	tailwind: {