fix: Resolve Tailwind CSS v4/v3 compatibility issues for deployment

- Downgrade @astrojs/tailwind to v5.1.1 for v3 compatibility
- Remove @tailwindcss/vite dependency (v4 specific)
- Update tailwindcss to v3.4.17
- Fix astro.config.mjs to use standard Tailwind integration
- Update CSS imports to use v3 @tailwind directives

Fixes server deployment build failures due to dependency conflicts.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -19,7 +19,7 @@
     "@astrojs/check": "^0.9.4",
     "@astrojs/node": "^9.3.0",
     "@astrojs/react": "^4.3.0",
-    "@astrojs/tailwind": "^6.0.2",
+    "@astrojs/tailwind": "^5.1.1",
     "@craftjs/core": "^0.2.12",
     "@craftjs/utils": "^0.2.5",
     "@modelcontextprotocol/sdk": "^1.0.3",
@@ -28,7 +28,6 @@
     "@stripe/connect-js": "^3.3.25",
     "@supabase/ssr": "^0.0.10",
     "@supabase/supabase-js": "^2.50.3",
-    "@tailwindcss/vite": "^4.1.11",
     "@types/bcrypt": "^5.0.2",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
@@ -45,7 +44,7 @@
     "react-easy-crop": "^5.4.2",
     "resend": "^4.6.0",
     "stripe": "^18.3.0",
-    "tailwindcss": "^4.1.11",
+    "tailwindcss": "^3.4.17",
     "uuid": "^11.1.0",
     "winston": "^3.17.0",
     "zod": "^3.25.75"