fix:禁工作台跳系统管理

frontend/app/components/admin/ProjectManagementPage.tsx

@@ -391,8 +391,8 @@ export function ProjectManagementPage({
               </div>
               <button className="icon-button" type="button" onClick={() => setImportMemberDialogOpen(false)}><Icon name="close" /></button>
             </div>
-            <div style={{ padding: "20px 24px 110px" }}>
-              <label className="form-field">
+            <form >
+              <label className="form-field"  style={{ paddingBottom: 120 }}>
                 <span>选择用户<span className="required">*</span></span>
                 <UserMultiSelect
                   users={availableUsers}
@@ -401,13 +401,13 @@ export function ProjectManagementPage({
                   existingMemberIds={currentProjectMembers.map((m) => m.user_id)}
                 />
               </label>
-            </div>
-            <div style={{ display: "flex", justifyContent: "flex-end", gap: "8px", padding: "16px 24px", borderTop: "1px solid #e8e8e8" }}>
-              <button className="secondary-button" type="button" onClick={() => setImportMemberDialogOpen(false)}>取消</button>
-              <button className="primary-button" type="button" disabled={saving || selectedUserIds.length === 0} onClick={() => void importMember()}>
-                {saving ? "添加中…" : `添加 (${selectedUserIds.length})`}
-              </button>
-            </div>
+              <div className="modal__footer">
+                <button className="secondary-button" type="button" onClick={() => setImportMemberDialogOpen(false)}>取消</button>
+                <button className="primary-button" type="button" disabled={saving || selectedUserIds.length === 0} onClick={() => void importMember()}>
+                  {saving ? "添加中…" : `添加 (${selectedUserIds.length})`}
+                </button>
+              </div>
+            </form>
           </section>
         </div>
       )}