feat: 增强报名管理功能，新增删除课程学习记录API，优化受众选择弹窗的多选逻辑和搜索功能

(cherry picked from commit 5f518b713a)

src/components/signup/SignupModal.vue

@@ -35,7 +35,7 @@
                 <el-button type="primary" size="small" @click="onSearchStu">
                   搜索
                 </el-button>
-                <el-button type="primary" size="small" @click="resetStu">重置</el-button>
+                <el-button size="small" @click="resetStu">重置</el-button>
               </div>
             <div class="split">
                 <div class="left-tree">
@@ -43,8 +43,15 @@
                     @node-click="onOrgSelect" />
                 </div>
                 <div class="table-area">
-                  <el-table class="use-table" border :data="stuTable.list" 
-                    @selection-change="onStuSelectionChange" :row-key="row => row.id || row.userId">
+                  <el-table
+                    ref="stuTable"
+                    class="use-table"
+                    border
+                    :data="stuTable.list"
+                    @selection-change="onStuSelectionChange"
+                    :row-key="row => row.id || row.userId"
+                    :reserve-selection="true"
+                  >
                     <el-table-column type="selection" width="50" />
                     <el-table-column prop="realName" label="姓名" width="120" />
                     <el-table-column prop="userNo" label="工号" width="120" />
@@ -83,8 +90,15 @@
               </el-button>
               <el-button size="small" @click="resetAudienceInfo">重置</el-button>
             </div>
-            <el-table class="use-table" border :data="audienceTable.list" @selection-change="onAudienceSelectionChange"
-              :row-key="row => row.id">
+            <el-table
+              ref="audienceTable"
+              class="use-table"
+              border
+              :data="audienceTable.list"
+              @selection-change="onAudienceSelectionChange"
+              :row-key="row => row.id"
+              :reserve-selection="true"
+            >
               <el-table-column type="selection" width="50" />
               <el-table-column prop="audienceName" label="受众名称" min-width="220" />
               <el-table-column prop="totalMember" label="总人数" width="100" />
@@ -309,6 +323,8 @@ export default {
     visible(val) {
       if (val) {
         this.initData();
+      } else {
+        this.resetState();
       }
     },
   },
@@ -318,6 +334,30 @@ export default {
     }
   },
   methods: {
+    // 参考 CommonStudent.vue，在关闭弹窗时清空各种选中与搜索条件
+    resetState() {
+      this.projectParams.studentName = "";
+      this.nameSearch = { keyword: "", departId: "" };
+      this.audienceName = { keyword: "" };
+      this.searchOrgName = { keyword: "", pageNo: 1, pageSize: 200 };
+      this.projectSelectRows = [];
+      this.stuSelectRows = [];
+      this.auditSelectRows = [];
+      this.deptList = [];
+      this.selectedOrgKeys = [];
+      this.member = false;
+      this.dept = false;
+      this.person = false;
+      this.group = false;
+
+      // 清空表格勾选
+      if (this.$refs.stuTable && this.$refs.stuTable.clearSelection) {
+        this.$refs.stuTable.clearSelection();
+      }
+      if (this.$refs.audienceTable && this.$refs.audienceTable.clearSelection) {
+        this.$refs.audienceTable.clearSelection();
+      }
+    },
     initData() {
       this.courseDetail = JSON.parse(sessionStorage.getItem("courseDetail") || "{}");
       this.projectParams = {
@@ -374,6 +414,10 @@ export default {
         console.log("res", res);
         this.stuTable.list = res.data?.list || [];
         this.stuTable.total = res.data?.total || 0;
+        // 根据右侧已选，恢复当前页的勾选状态
+        this.$nextTick(() => {
+          this.syncStuTableSelection();
+        });
       });
     },
     onStuPageChange(page) {
@@ -381,7 +425,22 @@ export default {
       this.onSearchStu();
     },
     onStuSelectionChange(list) {
-      this.stuSelectRows = list;
+      // Element 表格在翻页时会把当前页的 selection 通过 list 传进来
+      // 为了保留其他页已选，这里做合并而不是直接覆盖
+      const currentPageIds = this.stuTable.list.map((r) => r.id || r.userId);
+      // 先保留非当前页的已选
+      const otherPageSelected = this.stuSelectRows.filter(
+        (r) => !currentPageIds.includes(r.id || r.userId)
+      );
+      const merged = [...otherPageSelected, ...list];
+      // 根据 id/userId 去重
+      const seen = new Set();
+      this.stuSelectRows = merged.filter((r) => {
+        const key = r.id || r.userId;
+        if (!key || seen.has(key)) return false;
+        seen.add(key);
+        return true;
+      });
     },
     resetStu() {
       this.nameSearch = { keyword: "", departId: "" };
@@ -444,6 +503,10 @@ export default {
         console.log('searchAudience', res);
         this.audienceTable.list = res.data?.list || [];
         this.audienceTable.total = res.data?.total || 0;
+        // 根据右侧已选，恢复当前页的受众勾选状态
+        this.$nextTick(() => {
+          this.syncAudienceTableSelection();
+        });
       });
     },
     onAudiencePageChange(page) {
@@ -451,7 +514,50 @@ export default {
       this.searchAudience();
     },
     onAudienceSelectionChange(list) {
-      this.auditSelectRows = list;
+      const currentPageIds = this.audienceTable.list.map((r) => r.id);
+      const otherPageSelected = this.auditSelectRows.filter(
+        (r) => !currentPageIds.includes(r.id)
+      );
+      const merged = [...otherPageSelected, ...list];
+      const seen = new Set();
+      this.auditSelectRows = merged.filter((r) => {
+        const key = r.id;
+        if (!key || seen.has(key)) return false;
+        seen.add(key);
+        return true;
+      });
+    },
+    // 根据 stuSelectRows 恢复当前页表格里的勾选
+    syncStuTableSelection() {
+      if (!this.$refs.stuTable) return;
+      const table = this.$refs.stuTable;
+      if (!table.clearSelection || !table.toggleRowSelection) return;
+      const selectedMap = new Set(
+        (this.stuSelectRows || []).map((r) => r.id || r.userId)
+      );
+      table.clearSelection();
+      this.stuTable.list.forEach((row) => {
+        const key = row.id || row.userId;
+        if (key && selectedMap.has(key)) {
+          table.toggleRowSelection(row, true);
+        }
+      });
+    },
+    // 根据 auditSelectRows 恢复当前页受众表格里的勾选
+    syncAudienceTableSelection() {
+      if (!this.$refs.audienceTable) return;
+      const table = this.$refs.audienceTable;
+      if (!table.clearSelection || !table.toggleRowSelection) return;
+      const selectedMap = new Set(
+        (this.auditSelectRows || []).map((r) => r.id)
+      );
+      table.clearSelection();
+      this.audienceTable.list.forEach((row) => {
+        const key = row.id;
+        if (key && selectedMap.has(key)) {
+          table.toggleRowSelection(row, true);
+        }
+      });
     },
     resetAudienceInfo() {
       this.audienceName.keyword = "";