fix: add missing filler_ratio and update WITHOUT reference scoring ranges

- Add filler_ratio back to detect_filler_words() return value
- Update WITHOUT reference scoring: 81-100%=5, 61-80%=4, 41-60%=3, 21-40%=2, 0-20%=1
- Show percentage in reason message for clarity

app/services/articulation.py

@@ -384,25 +384,28 @@ class ArticulationService:
                 energy_score * weights['energy']
             )
             
-            # Convert to 1-5 scale
-            score_5 = int(np.clip(total_score / 20, 1, 5))
-            
-            # Category
-            if score_5 >= 5:
+            # Convert to 1-5 scale based on percentage ranges
+            # 81-100% = 5, 61-80% = 4, 41-60% = 3, 21-40% = 2, 0-20% = 1
+            if total_score >= 81:
+                score_5 = 5
                 category = "Sempurna"
-                reason = "Artikulasi sangat jelas dan konsisten"
-            elif score_5 >= 4:
+                reason = f"Artikulasi sangat jelas ({total_score:.1f}%) dan konsisten"
+            elif total_score >= 61:
+                score_5 = 4
                 category = "Baik"
-                reason = "Artikulasi jelas dengan tempo stabil"
-            elif score_5 >= 3:
+                reason = f"Artikulasi jelas ({total_score:.1f}%) dengan tempo stabil"
+            elif total_score >= 41:
+                score_5 = 3
                 category = "Cukup"
-                reason = "Artikulasi cukup jelas, ada sedikit variasi tempo"
-            elif score_5 >= 2:
+                reason = f"Artikulasi cukup jelas ({total_score:.1f}%), ada sedikit variasi tempo"
+            elif total_score >= 21:
+                score_5 = 2
                 category = "Kurang"
-                reason = "Artikulasi kurang jelas, tempo tidak stabil"
+                reason = f"Artikulasi kurang jelas ({total_score:.1f}%), tempo tidak stabil"
             else:
+                score_5 = 1
                 category = "Buruk"
-                reason = "Artikulasi tidak jelas dan sulit dipahami"
+                reason = f"Artikulasi tidak jelas ({total_score:.1f}%) dan sulit dipahami"
             
             print(f"\n📊 Score Breakdown (WITHOUT REFERENCE):")
             print(f"   Clarity:   {clarity_score:.1f}% (weight: {weights['clarity']*100:.0f}%)")