Add public curator notes and U-shaped hall wall hang.

Paintings get editable curator notes with brass plates in the 3D hall, and visit order now uses the far/end wall between left and right.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -16,8 +16,9 @@ TRUST_PROXY=true
 IMAGE_DIR=./data/images
 
 # Curator auth (run npm run dev:migrate after setting CURATOR_PASSWORD)
+# Reset password anytime: npm run dev:reset-curator
 SESSION_SECRET=change-me-to-a-long-random-string
-SESSION_COOKIE_SECURE=false
+# Omit SESSION_COOKIE_SECURE for auto (HTTPS via proxy → Secure cookie). Set true/false to force.
 CURATOR_USERNAME=curator
 CURATOR_PASSWORD=