fix: chuẩn hóa tên ảnh tour về ASCII (chua-thai-lac/01..26.jpg)

Tên thư mục/file Unicode tiếng Việt bị lệch chuẩn hóa (thư mục NFC, file NFD)
khiến URL ảnh 404 khi phục vụ tĩnh. Đổi sang đường dẫn ASCII ổn định, tránh
lỗi mã hóa khi triển khai trên mọi máy chủ/CDN. Cập nhật content.ts và
cấu hình tour theo số thứ tự cảnh; dọn scaffold svg mặc định.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

public/file.svg

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public/globe.svg

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public/next.svg

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public/vercel.svg

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-<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>

public/window.svg

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