fix: analytics avg_daily_expense uses selected month/year instead of current

internal/handler/finance.go

@@ -253,11 +253,21 @@ func (h *FinanceHandler) Analytics(w http.ResponseWriter, r *http.Request) {
 	if !ok {
 		return
 	}
-	months, _ := strconv.Atoi(r.URL.Query().Get("months"))
+	q := r.URL.Query()
+	months, _ := strconv.Atoi(q.Get("months"))
 	if months <= 0 {
 		months = 6
 	}
-	analytics, err := h.svc.GetAnalytics(userID, months)
+	now := time.Now()
+	month, _ := strconv.Atoi(q.Get("month"))
+	year, _ := strconv.Atoi(q.Get("year"))
+	if month <= 0 {
+		month = int(now.Month())
+	}
+	if year <= 0 {
+		year = now.Year()
+	}
+	analytics, err := h.svc.GetAnalytics(userID, months, month, year)
 	if err != nil {
 		writeError(w, "failed to get analytics", http.StatusInternalServerError)
 		return