fix: Ensure current year is included in yearly stats even if no data

app/routers/stats.py

@@ -143,12 +143,17 @@ async def get_plant_stats(
                 year_key = date_str[:4]
                 yearly[year_key] = yearly.get(year_key, 0) + val
                 
-            sorted_keys = sorted(yearly.keys())
-            data = [
-                {"label": k, "value": round(yearly[k], 2)}
-                for k in sorted_keys
-                if k >= str(start_date.year)
-            ]
+            # 최근 10년 (또는 지정된 기간) 연도별 데이터 생성 (데이터 없으면 0)
+            data = []
+            target_start_year = start_date.year
+            current_year = today.year
+            
+            for y in range(target_start_year, current_year + 1):
+                y_str = str(y)
+                data.append({
+                    "label": y_str,
+                    "value": round(yearly.get(y_str, 0), 2)
+                })
 
         return {
             "status": "success",