refactor(契约): 判题状态码收进契约唯一一份，并收紧 18 处 as any

- 状态码常量与 judgeStatusSchema 移到 packages/contract/src/judge-status.ts，
  后端 judge/status.ts 只再导出；前端 SubmissionStatus 枚举加编译期断言对齐契约
  （实测改坏一个码会当场类型检查失败）
- 类型逃逸 22 处降到 4 处：collab/handler、pagination、configUpdate、
  ExerciseManager、ProblemSubmission、pk.vue tooltip；剩下的是词云插件无类型、
  生成的 .d.ts、skulpt 和 TextEditor

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

packages/contract/src/submission.ts

@@ -1,23 +1,9 @@
 import { z } from "zod"
 
 import { paginatedSchema } from "./common"
+import { judgeStatusSchema, type JudgeStatus } from "./judge-status"
 import { problemLanguageSchema } from "./language"
 
-export const judgeStatusSchema = z.union([
-  z.literal(-2),
-  z.literal(-1),
-  z.literal(0),
-  z.literal(1),
-  z.literal(2),
-  z.literal(3),
-  z.literal(4),
-  z.literal(5),
-  z.literal(6),
-  z.literal(7),
-  z.literal(8),
-  z.literal(10),
-])
-
 /**
  * 判题机原始输出（`submission.info` 的 JSONB 原文）。**只是类型，不作运行时校验。**
  *
@@ -397,7 +383,6 @@ export const formatCodeRequestSchema = z.object({
 
 export const formatCodeResponseSchema = z.object({ code: z.string() })
 
-export type JudgeStatus = z.infer<typeof judgeStatusSchema>
 export type StatisticInfo = z.infer<typeof statisticInfoSchema>
 export type CreateSubmissionRequest = z.infer<
   typeof createSubmissionRequestSchema