fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/astro/dist/runtime/client/dev-toolbar/ui-library/index.d.ts

@@ -0,0 +1,10 @@
+export { DevToolbarBadge } from './badge.js';
+export { DevToolbarButton } from './button.js';
+export { DevToolbarCard } from './card.js';
+export { DevToolbarHighlight } from './highlight.js';
+export { DevToolbarIcon } from './icon.js';
+export { DevToolbarRadioCheckbox } from './radio-checkbox.js';
+export { DevToolbarSelect } from './select.js';
+export { DevToolbarToggle } from './toggle.js';
+export { DevToolbarTooltip } from './tooltip.js';
+export { DevToolbarWindow } from './window.js';