feat(modules): add leave-requests, invitation-codes, and standards modules

- Add leave-requests module for staff and student leave request management

- Add invitation-codes module for class invitation code generation and redemption

- Add standards module for curriculum standards management

src/modules/standards/schema.ts

@@ -0,0 +1,68 @@
+/**
+ * M1 课标（Standards）模块 - Zod 验证 schema
+ *
+ * 所有错误消息使用 i18n 键，由 actions 层通过 translateFieldErrors() 翻译。
+ */
+import { z } from "zod";
+
+export const createStandardSchema = z.object({
+  code: z.string().min(1, "error.codeRequired").max(100, "error.codeTooLong"),
+  title: z.string().min(1, "error.titleRequired").max(255, "error.titleTooLong"),
+  description: z.string().max(2000, "error.descriptionTooLong").optional(),
+  level: z.enum(["national", "curriculum", "custom"]),
+  parentId: z.string().optional(),
+  subjectId: z.string().optional(),
+  gradeId: z.string().optional(),
+  stage: z.enum(["primary", "junior_high", "senior_high"]).optional(),
+  sortOrder: z.number().int().min(0).default(0),
+});
+
+export const updateStandardSchema = z.object({
+  id: z.string().min(1, "error.idRequired"),
+  title: z.string().min(1, "error.titleRequired").max(255, "error.titleTooLong").optional(),
+  description: z.string().max(2000, "error.descriptionTooLong").optional(),
+  parentId: z.string().optional(),
+  sortOrder: z.number().int().min(0).optional(),
+  isActive: z.boolean().optional(),
+});
+
+export const getStandardsParamsSchema = z.object({
+  level: z.enum(["national", "curriculum", "custom"]).optional(),
+  parentId: z.string().optional(),
+  subjectId: z.string().optional(),
+  gradeId: z.string().optional(),
+  stage: z.enum(["primary", "junior_high", "senior_high"]).optional(),
+  includeInactive: z.boolean().optional(),
+  asTree: z.boolean().optional(),
+});
+
+export const importStandardsSchema = z.object({
+  standards: z
+    .array(
+      z.object({
+        code: z.string().min(1, "error.codeRequired"),
+        title: z.string().min(1, "error.titleRequired"),
+        description: z.string().optional(),
+        level: z.enum(["national", "curriculum", "custom"]),
+        parentId: z.string().optional(),
+        subjectId: z.string().optional(),
+        gradeId: z.string().optional(),
+        stage: z.enum(["primary", "junior_high", "senior_high"]).optional(),
+        sortOrder: z.number().int().min(0).optional(),
+      }),
+    )
+    .min(1, "error.atLeastOneStandard"),
+  conflictStrategy: z.enum(["skip", "update", "fail"]).default("skip"),
+});
+
+export const linkPlanToStandardSchema = z.object({
+  planId: z.string().min(1, "error.planIdRequired"),
+  standardId: z.string().min(1, "error.standardIdRequired"),
+  relationType: z.enum(["primary", "related"]).default("primary"),
+});
+
+export type CreateStandardInput = z.infer<typeof createStandardSchema>;
+export type UpdateStandardInput = z.infer<typeof updateStandardSchema>;
+export type GetStandardsParamsInput = z.infer<typeof getStandardsParamsSchema>;
+export type ImportStandardsInputZod = z.infer<typeof importStandardsSchema>;
+export type LinkPlanToStandardInput = z.infer<typeof linkPlanToStandardSchema>;