feat: liquid glass UI, blob background, redesign home/portfolio/about pages

- Liquid glass effect on navbar/cards with backdrop-filter invert
- Animated blob gradient background (SVG-based)
- Portfolio section: scene-dark invert, show 5 items on home
- How Work section: step flow with numbers + connecting lines
- Hero: Decision snapshot replacing problem selector
- About page: inverted background with contrast fixes
- Fix parallax JS bundling via Astro
- Fix navbar fixed positioning after liquid glass CSS
- Submenu hover fix
- Clean up removed legacy files/assets

redesign-input/raw/src-content/portfolio/jet-industries.md

@@ -0,0 +1,12 @@
+---
+name: "Jet Industries"
+url: "https://jetindustries.co.th"
+category: "webdev"
+category_label: "Website Development"
+industry: "โรงงาน / B2B"
+what_we_did: "ออกแบบ + พัฒนาเว็บไซต์ B2B ทันสมัย"
+result: "เว็บไซต์ที่สื่อสารตรงกับกลุ่มลูกค้า B2B สมัครใช้งานง่ายขึ้น"
+thumbnail: "/images/portfolio/jetindustries.png"
+featured: true
+order: 18
+---