feat(tailwind): add wood texture background utilities

- Add bg-wood-light, bg-wood-dark, bg-wood-mahogany utilities
- Reference texture files in web/static/textures/
- Extend theme.backgroundImage for seamless texture support

tailwind.config.ts

@@ -42,6 +42,11 @@ const config: Config = {
         'accent': 'var(--accent)',
         'border': 'var(--border)',
       },
+      backgroundImage: {
+        'wood-light': "url('/static/textures/wood-light.png')",
+        'wood-dark': "url('/static/textures/wood-dark.png')",
+        'wood-mahogany': "url('/static/textures/wood-mahogany.png')",
+      },
       typography: ({ theme }) => ({
         invert: {
           css: {