feat: 实现ID生成器并重构模型ID生成逻辑

refactor: 统一ID生成方式，使用新的idGenerator模块
refactor: 重构模型ID生成逻辑，允许空ID并在创建前自动生成
fix(roomSchema): 使机房ID字段变为可选并更新前端表单验证
style: 格式化代码并优化导入语句
test: 添加操作日志集成测试文件
docs: 添加错误处理模块文档

backend/utils/idGenerator.js

@@ -0,0 +1,71 @@
+
+const DEFAULT_CONFIG = {
+  prefix: '',
+  timestampBase: 36,
+  timestampUpperCase: true,
+  randomLength: 4,
+  randomBase: 36,
+  randomUpperCase: true,
+};
+
+function generateId(config = {}) {
+  const {
+    prefix,
+    timestampBase,
+    timestampUpperCase,
+    randomLength,
+    randomBase,
+    randomUpperCase,
+  } = { ...DEFAULT_CONFIG, ...config };
+
+  const timestamp = Date.now().toString(timestampBase);
+  const formattedTimestamp = timestampUpperCase ? timestamp.toUpperCase() : timestamp;
+
+  let randomStr = '';
+  for (let i = 0; i < randomLength; i++) {
+    randomStr += Math.floor(Math.random() * randomBase).toString(randomBase);
+  }
+  const formattedRandom = randomUpperCase ? randomStr.toUpperCase() : randomStr;
+
+  return `${prefix}${formattedTimestamp}${formattedRandom}`;
+}
+
+function generateTicketId() {
+  return generateId({ prefix: 'TKT', randomLength: 4 });
+}
+
+function generateRoleId() {
+  return generateId({ 
+    prefix: 'role_', 
+    timestampUpperCase: false, 
+    randomLength: 9, 
+    randomUpperCase: false 
+  });
+}
+
+function generatePlanId() {
+  return generateId({ prefix: 'PLAN', randomLength: 4 });
+}
+
+function generateTaskId() {
+  return generateId({ prefix: 'TASK', randomLength: 4 });
+}
+
+function generateRecordId() {
+  return generateId({ prefix: 'REC', randomLength: 6 });
+}
+
+function generatePendingId() {
+  return generateId({ prefix: 'PEND', randomLength: 4 });
+}
+
+module.exports = {
+  generateId,
+  generateTicketId,
+  generateRoleId,
+  generatePlanId,
+  generateTaskId,
+  generateRecordId,
+  generatePendingId,
+  DEFAULT_CONFIG,
+};