fix: 计划模块弹窗完整修复

- 弹窗HTML从finance.js干净复制, 结构完全对齐
- 25个modal ID加plan_前缀, 与实际模块零冲突
- 16个window函数+4个全局函数加plan前缀, 避免覆盖
- closePlanModal关闭后调用render()清理DOM
- CSS 5条规则加上#planModal选择器
- isUnsigned=false, 表格14列+卡片14个
- 版本号 v1.0.0.20

static/styles.css

@@ -96,26 +96,26 @@ body {
 }
 
 /* 详情弹窗固定高度，tab 切换不抖动 */
-#financeModal > div {
+#financeModal > div, #planModal > div {
   height: 650px;
   display: flex;
   flex-direction: column;
 }
-#financeModal .finance-tabs { flex-shrink: 0; }
-#financeModal form {
+#financeModal .finance-tabs, #planModal .finance-tabs { flex-shrink: 0; }
+#financeModal form, #planModal form {
   flex: 1;
   min-height: 0;
   display: flex;
   flex-direction: column;
   overflow: hidden;
 }
-#financeModal .finance-tab-body {
+#financeModal .finance-tab-body, #planModal .finance-tab-body {
   flex: 1;
   min-height: 0;
   overflow-y: auto;
   padding: 32px;
 }
-#financeModal .finance-form-actions {
+#financeModal .finance-form-actions, #planModal .finance-form-actions {
   flex-shrink: 0;
   background: #fff;
   padding: 12px 32px 8px;