chore: 强化代码质量与风格检查体系

ESLint 升级到 recommended-type-checked + stylistic-type-checked，
引入 perfectionist 导入排序和 import 插件导入验证。

Prettier 显式声明全部格式化参数，消除跨环境差异。
TypeScript 启用 noUnusedLocals 和 noPropertyAccessFromIndexSignature。
完善 ignore 列表，排除 .agents/、bun.lock、data/ 等。
引入 husky + lint-staged（pre-commit）+ commitlint（commit-msg）。
更新 DEVELOPMENT.md 代码质量章节。
修复所有新增规则检测到的类型和风格违规。

tests/server/checker/runner/shared/failure.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, test } from "bun:test";
-import { truncateActual, mismatchFailure, errorFailure } from "../../../../../src/server/checker/runner/shared/failure";
+
+import { errorFailure, mismatchFailure, truncateActual } from "../../../../../src/server/checker/runner/shared/failure";
 
 describe("truncateActual", () => {
   test("短字符串不截断", () => {
@@ -43,12 +44,12 @@ describe("mismatchFailure", () => {
   test("返回正确的 mismatch 结构", () => {
     const f = mismatchFailure("status", "status", [200], 500, "status mismatch");
     expect(f).toEqual({
-      kind: "mismatch",
-      phase: "status",
-      path: "status",
-      expected: [200],
       actual: 500,
+      expected: [200],
+      kind: "mismatch",
       message: "status mismatch",
+      path: "status",
+      phase: "status",
     });
   });
 
@@ -65,9 +66,9 @@ describe("errorFailure", () => {
     const f = errorFailure("body", "body[0].json($.x)", "body is not valid JSON");
     expect(f).toEqual({
       kind: "error",
-      phase: "body",
-      path: "body[0].json($.x)",
       message: "body is not valid JSON",
+      path: "body[0].json($.x)",
+      phase: "body",
     });
   });