feat(fusion_portal): Phase 2a - mobility scooter ADP type + power-mobility home-access rule

Adds 'scooter' as a 4th ADP equipment type with a lean Express-form section
(scooter type + max range) and the power-mobility home-accessibility hard rule
(scooter + powerchair): "is the home usable inside and outside, no lifting?" - if No,
prompts adding an accessibility item (ramp / porch lift). Captures
x_fc_power_home_accessible + notes; the section toggles via the existing
equipment-select JS; controller parses the new fields.

NOT YET: ADP multi-device + combination rules (the bigger restructure).
Untested locally (Enterprise dep) - to be verified on a westin-v19 clone.

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

fusion_portal/models/assessment.py

@@ -45,6 +45,7 @@ class FusionAssessment(models.Model):
         ('rollator', 'Rollator'),
         ('wheelchair', 'Wheelchair'),
         ('powerchair', 'Powerchair'),
+        ('scooter', 'Mobility Scooter'),
     ], string='Equipment Type', tracking=True, index=True)
     
     # Rollator Types
@@ -69,6 +70,31 @@ class FusionAssessment(models.Model):
         ('type_2', 'Adult Power Base Type 2'),
         ('type_3', 'Adult Power Base Type 3'),
     ], string='Powerchair Type')
+
+    # ===== MOBILITY SCOOTER (ADP) — 2026-06 Phase 2 =====
+    scooter_type = fields.Selection([
+        ('travel_3', '3-Wheel Travel/Portable'),
+        ('travel_4', '4-Wheel Travel/Portable'),
+        ('standard_3', '3-Wheel Standard'),
+        ('standard_4', '4-Wheel Standard'),
+        ('heavy_duty', 'Heavy-Duty / Bariatric'),
+    ], string='Scooter Type')
+    scooter_max_range = fields.Float(
+        string='Maximum Range Needed (km)', digits=(10, 1),
+        help='Maximum distance the client needs the scooter to travel on a charge.',
+    )
+
+    # ===== POWER-MOBILITY HOME ACCESSIBILITY (ADP hard rule) =====
+    # Applies to scooter + power wheelchair: ADP funds power mobility only if the
+    # device can enter and be used at the residence independently, without lifting.
+    x_fc_power_home_accessible = fields.Selection([
+        ('yes', 'Yes — usable inside and outside independently'),
+        ('no', 'No — home needs accessibility work'),
+    ], string='Home accessible for power-mobility device?',
+        help='ADP will not fund a scooter / power wheelchair if the home cannot '
+             'take it (device left outside or in the garage). If No, the home '
+             'needs an accessibility product (ramp / porch lift).')
+    x_fc_power_home_access_notes = fields.Text(string='Home Access Notes')
     
     # ===== EXPRESS FORM: ROLLATOR MEASUREMENTS =====
     rollator_handle_height = fields.Float(string='Handle Height (inches)', digits=(10, 2))