feat(admin): refine header layout and logo placement

- Left-align logo across breakpoints; remove duplicate centered/mobile blocks
- Add date separator and spacing; keep header compact and readable

fix(admin): prevent category badge overlap in grid

- Move badge to top-left; make non-interactive; constrain width to avoid checkbox collisions

chore(docker): support ADMIN_PASSWORD in docker-compose

- Allow setting initial admin password via env for easier provisioning

chore(backend): normalize EOF newline in set-admin-password.js

Refs: admin-header-layout, category-badge-overlap, docker-admin-password

docker-compose.yml

@@ -11,6 +11,7 @@ services:
       - JWT_SECRET=${JWT_SECRET}
       - ADMIN_USERNAME=${ADMIN_USERNAME:-admin}
       - ADMIN_EMAIL=${ADMIN_EMAIL:[email protected]}
+      - ADMIN_PASSWORD=${ADMIN_PASSWORD}
       - DATABASE_CLIENT=pg
       - DATABASE_URL=postgresql://${DB_USER}:${DB_PASSWORD}@postgres:5432/${DB_NAME}
       - DB_TYPE=postgresql