Update front-facing metrics implementation

- Enhanced shoulder tilt calculation with 3D world coordinate support
- Improved wrist hinge measurements with P3 and top-of-swing analysis
- Added comprehensive metric validation and quality checks
- Refined hip turn and sway calculations for better accuracy

app/models/front_facing_metrics.py

@@ -413,7 +413,7 @@ def pelvis_hat(world_frame):
 def _pelvis_rel_to_target(world_frame, target_hat):
     """Get pelvis orientation relative to target axis"""
     ph = pelvis_hat(world_frame)
-    return None if ph is None else wrap180(signed_angle2(target_hat, ph))
+    return None if ph is None else wrap180(signed_angle2(ph, target_hat))
 
 def _address_pelvis_rel(world_landmarks, setup_frames, target_hat):
     """Calculate median pelvis orientation relative to target at address"""
@@ -941,13 +941,13 @@ def calculate_hip_turn_at_impact(
         for f in impact_frames_nearby:
             ph = pelvis_hat(world_landmarks[f])
             if ph is not None:
-                impact_rels.append(signed_angle2(target_hat, ph))
+                impact_rels.append(signed_angle2(ph, target_hat))
         if impact_rels:
             impact_rel = np.median(impact_rels)
         else:
-            impact_rel = signed_angle2(target_hat, impact_pelvis_hat)
+            impact_rel = signed_angle2(impact_pelvis_hat, target_hat)
     else:
-        impact_rel = signed_angle2(target_hat, impact_pelvis_hat)
+        impact_rel = signed_angle2(impact_pelvis_hat, target_hat)
     
     # Hip orientation (absolute) vs target at impact
     hip_turn_abs = wrap180(impact_rel)
@@ -1145,7 +1145,7 @@ def _calculate_hip_turn_2d_fallback(pose_data: Dict[int, List], swing_phases: Di
             return None
         
         # Absolute target-relative angle at impact (not delta from setup)
-        impact_rel = signed_angle2(target_hat_2d, impact_pelvis_hat)
+        impact_rel = signed_angle2(impact_pelvis_hat, target_hat_2d)
         turn_2d = wrap180(impact_rel)