预算选择默认年份规则调整

src/components/BudgetSourcePickerField.vue

@@ -606,9 +606,9 @@ export default {
       }
 
       if (!this.yearId && this.yearOptions.length > 0) {
-        // 尝试根据当前 value 反查 year_id（可选），否则默认第一项
+        // 尝试根据当前 value 反查 year_id；未命中时优先回退到当前自然年，再回退到第一项
         const fromValue = await this.tryResolveYearIdByValue();
-        this.yearId = fromValue || this.yearOptions[0].value;
+        this.yearId = fromValue || this.getCurrentYearOptionValue() || this.yearOptions[0].value;
       }
 
       if (this.yearId) {
@@ -629,6 +629,13 @@ export default {
         this.yearLoading = false;
       }
     },
+    getCurrentYearOptionValue() {
+      const currentYear = new Date().getFullYear();
+      const matched = (this.yearOptions || []).find(
+        (y) => String(y.year) === String(currentYear)
+      );
+      return matched ? matched.value : null;
+    },
     async tryResolveYearIdByValue() {
       if (!this.hasValue) return null;
       const idFromValue = this.budgetDataId || (this.budgetItems[0] && this.budgetItems[0].budget_data_id);
@@ -1135,7 +1142,10 @@ export default {
       // 尝试获取年份ID
       if (!this.yearId) {
         const fromValue = await this.tryResolveYearIdByValue();
-        this.yearId = fromValue || (this.yearOptions.length > 0 ? this.yearOptions[0].value : null);
+        this.yearId =
+          fromValue ||
+          this.getCurrentYearOptionValue() ||
+          (this.yearOptions.length > 0 ? this.yearOptions[0].value : null);
       }
 
       // 如果没有年份ID，无法生成显示文本