fix(fusion_clock): NFC clock-out shows gross worked time, not net-of-penalty

The result card showed x_fclk_net_hours = worked_hours − break − early-out
penalty minutes. Tapping out before the scheduled end adds a 15-min early-out
penalty to the break field, so short shifts clamped to 0 → "Worked 0h 0m".

Show GROSS attendance.worked_hours (the actual clock-in → clock-out elapsed
time) instead, and format adaptively (Xh Ym / Ym / Ys) so brief shifts and
quick tests don't all read 0. Net-of-deductions stays in the payroll reports.

Live as 19.0.3.11.5 (verified worked_hours computes correctly in the DB).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

fusion_clock/controllers/clock_nfc_kiosk.py

@@ -367,7 +367,7 @@ class FusionClockNfcKiosk(http.Controller):
                 'employee_name': employee.name,
                 'employee_avatar_url': avatar_url,
                 'message': f'{employee.name} clocked in at {location.name}',
-                'net_hours_today': 0.0,
+                'worked_hours': 0.0,
                 'needs_photo': not employee.image_1920,
             }
         else:
@@ -393,7 +393,10 @@ class FusionClockNfcKiosk(http.Controller):
                 'employee_name': employee.name,
                 'employee_avatar_url': avatar_url,
                 'message': f'{employee.name} clocked out',
-                'net_hours_today': round(attendance.x_fclk_net_hours or 0, 2),
+                # GROSS time between clock-in and clock-out (what the employee
+                # expects to see). x_fclk_net_hours subtracts break + early-out
+                # penalty minutes, which zeroed short shifts — that's for payroll.
+                'worked_hours': attendance.worked_hours or 0.0,
                 'needs_photo': not employee.image_1920,
             }