- Group 13 tools into 4 color-coded categories (Images/Code/Web/Utils)
- Personalized greeting with user name from /auth/me
- About section with service description and stats (13 tools, 4 categories, free)
- Each category has icon, title, count badge, description
- Category-specific accent colors (blue/green/purple/yellow)
- Extract shared CSS (sidebar, theme vars, layout) into shared.css
- Extract shared JS (tailwind config, sidebar injection, theme toggle) into shared.js
- Remove ~1200 lines of duplicated code across 13 HTML pages
- Standardize all titles to format: Tool Name — WA Dev Tools
- Standardize page headers (h1 + description) across all tools
- Standardize container padding (tool-container class)
- Sidebar now injected via JS — single source of truth
- Use CSS variables for accent colors everywhere (no more hardcoded #0054e6)
