refactor: standardize background color to #121212

- Replaced inconsistent gray-900 and #171717 background colors with unified #121212 across all pages
- Removed unused imports from multiple component files
- Cleaned up trailing spaces in className attributes

src/pages/storage/StorageOverview.tsx

@@ -1,4 +1,4 @@
-import { Eyebrow, SectionHeader, P, Small } from '@/components/Texts'
+import { Small } from '@/components/Texts'
 
 const highlights = [
   {