草稿计划支持选择场次后“批量移除已选场次”，一次最多 100 个。

批量操作会完整校验：包含不存在、其他计划或已发布计划的场次时整批拒绝，不会部分删除。[ExamsController.cs (line 384)](E:/jiaowu/src/Jiaowu.Api/Controllers/ExamsController.cs:384)
草稿计划新增“删除草稿”按钮，删除前显示计划名称及场次数量确认。[ExamsView.vue (line 292)](E:/jiaowu/web/src/views/ExamsView.vue:292)
删除草稿计划会级联清理场次和监考关联；已发布计划不能删除。[ExamsController.cs (line 81)](E:/jiaowu/src/Jiaowu.Api/Controllers/ExamsController.cs:81)
删除后会自动切换到其他计划；没有剩余计划时正确显示空状态。
新增草稿、已发布、跨计划混选及级联删除测试。[ExamDeletionControllerTests.cs (line 17)](E:/jiaowu/tests/Jiaowu.Api.Tests/ExamDeletionControllerTests.cs:17)

src/Jiaowu.Api/Controllers/ExamsController.cs

@@ -76,6 +76,33 @@ public sealed class ExamsController(
         return await SaveAsync(plan.Id, true, cancellationToken);
     }
 
+    [HttpDelete("plans/{id:guid}")]
+    [Authorize(Roles = Managers)]
+    public async Task<ActionResult> DeletePlan(
+        Guid id,
+        CancellationToken cancellationToken)
+    {
+        var plan = await db.ExamPlans
+            .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
+        if (plan is null) return NotFound();
+        if (plan.Status != ExamPlanStatus.Draft)
+            return ConflictProblem("只有草稿考试计划可以删除。");
+
+        db.ExamPlans.Remove(plan);
+        try
+        {
+            await db.SaveChangesAsync(cancellationToken);
+            await cache.RemoveByTagAsync(
+                AppCacheTags.Timetables,
+                cancellationToken);
+            return NoContent();
+        }
+        catch (DbUpdateException)
+        {
+            return ConflictProblem("删除考试计划失败，关联数据可能已发生变化。");
+        }
+    }
+
     [HttpGet("plans/{id:guid}")]
     public async Task<ActionResult> GetPlan(Guid id, CancellationToken cancellationToken)
     {
@@ -354,6 +381,48 @@ public sealed class ExamsController(
         return await SaveAsync(id, false, cancellationToken);
     }
 
+    [HttpPost("plans/{planId:guid}/sessions/batch-remove")]
+    [Authorize(Roles = Managers)]
+    public async Task<ActionResult> RemoveSessionsBatch(
+        Guid planId,
+        RemoveExamSessionsBatchRequest request,
+        CancellationToken cancellationToken)
+    {
+        var sessionIds = request.SessionIds.Distinct().ToArray();
+        if (sessionIds.Length == 0)
+            return ValidationProblem("请至少选择一个考试场次。");
+        if (sessionIds.Length > 100)
+            return ValidationProblem("一次最多移除100个考试场次。");
+
+        var plan = await db.ExamPlans.AsNoTracking()
+            .FirstOrDefaultAsync(x => x.Id == planId, cancellationToken);
+        if (plan is null) return NotFound();
+        if (plan.Status != ExamPlanStatus.Draft)
+            return ConflictProblem("已发布的考试计划不能调整场次。");
+
+        var sessions = await db.ExamSessions
+            .Where(x => x.ExamPlanId == planId)
+            .WhereIn(sessionIds, x => x.Id)
+            .ToListAsync(cancellationToken);
+        if (sessions.Count != sessionIds.Length)
+            return ConflictProblem(
+                "所选考试场次包含不存在或不属于当前计划的记录，请刷新后重新选择。");
+
+        db.ExamSessions.RemoveRange(sessions);
+        try
+        {
+            await db.SaveChangesAsync(cancellationToken);
+            await cache.RemoveByTagAsync(
+                AppCacheTags.Timetables,
+                cancellationToken);
+            return Ok(new { removedCount = sessions.Count });
+        }
+        catch (DbUpdateException)
+        {
+            return ConflictProblem("批量移除考试场次失败，关联数据可能已发生变化。");
+        }
+    }
+
     // ═══════════════════════════════════════════
     //  Auto-arrange
     // ═══════════════════════════════════════════
@@ -958,6 +1027,9 @@ public sealed record CreateExamSessionsBatchRequest(
     [Range(1, 10)] int RequiredInvigilatorCount,
     [MaxLength(500)] string? Notes);
 
+public sealed record RemoveExamSessionsBatchRequest(
+    [Required] IReadOnlyCollection<Guid> SessionIds);
+
 public sealed record ExamAutoArrangeRequest(
     IReadOnlyCollection<Guid>? SessionIds = null,
     bool AssignClassrooms = true,