Aug 5 - Add new design (switchable)

app/models/user.py

@@ -25,6 +25,15 @@ class User(UserMixin, db.Model):
     created_at    = db.Column(db.DateTime, default=now_eastern)
     active        = db.Column(db.Boolean, default=True, nullable=False)
 
+    # ── Web portal design preference (phase48 — design A/B test) ──────────
+    # 'classic' = the original top-navbar design (default for every account).
+    # 'modern'  = the sidebar design from the JQC_design deck.
+    # Drives base.html's layout dispatch via the inject_ui_theme() context
+    # processor.  Persisted per user so the choice survives logout and can be
+    # tallied as a vote (see /ui/theme-votes).
+    ui_theme      = db.Column(db.String(16), nullable=False,
+                              server_default='classic', default='classic')
+
     # ── Customer password-setup workflow ──────────────────────────────────
     # password_set: False for newly created customer accounts until they
     #               complete the set-password flow via emailed link.