🎨 Fix: Add CSS import to BaseLayout + use standard Tailwind colors

- Added import '../styles/global.css' to BaseLayout.astro
- Changed custom colors to standard Tailwind (green-600, gray-600)
- CSS now properly bundled and served

Fixes:
✅ No styles applying to website
✅ Tailwind CSS now working
✅ Button and card styles functional

dist/manifest.json

@@ -1,26 +0,0 @@
-{
-  "name": "Deal Plus Tech",
-  "short_name": "DPT",
-  "description": "ผู้เชี่ยวชาญด้านระบบน้ำ จำหน่ายท่อ PPR, ท่อ HDPE, รั้วตาข่าย, อุปกรณ์ท่อน้ำ",
-  "start_url": "/",
-  "display": "standalone",
-  "background_color": "#ffffff",
-  "theme_color": "#1e40af",
-  "orientation": "portrait-primary",
-  "icons": [
-    {
-      "src": "/favicon-512.jpg",
-      "sizes": "512x512",
-      "type": "image/jpeg",
-      "purpose": "any maskable"
-    },
-    {
-      "src": "/favicon-512.jpg",
-      "sizes": "192x192",
-      "type": "image/jpeg"
-    }
-  ],
-  "categories": ["business", "shopping"],
-  "lang": "th",
-  "dir": "ltr"
-}