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。

src/server/helpers.ts

@@ -1,6 +1,10 @@
 import type { ApiErrorResponse, CheckFailure, CheckResult, HealthResponse, RuntimeMode } from "../shared/api";
 import type { StoredCheckResult } from "./checker/types";
 
+export function allowsGetHead(method: string): boolean {
+  return method === "GET" || method === "HEAD";
+}
+
 export function createApiError(error: string, status: number): ApiErrorResponse {
   return { error, status };
 }
@@ -16,9 +20,23 @@ export function createHeaders(mode: RuntimeMode, init: HeadersInit): Headers {
   return headers;
 }
 
+export function createHealthResponse(): HealthResponse {
+  return {
+    ok: true,
+    service: "dial-server",
+    timestamp: new Date().toISOString(),
+  };
+}
+
+export function formatDuration(ms: number): string {
+  if (ms >= 60000 && ms % 60000 === 0) return `${ms / 60000}m`;
+  if (ms >= 1000 && ms % 1000 === 0) return `${ms / 1000}s`;
+  return `${ms}ms`;
+}
+
 export function jsonResponse(
   body: unknown,
-  options: { method?: string; mode: RuntimeMode; status?: number; headers?: HeadersInit },
+  options: { headers?: HeadersInit; method?: string; mode: RuntimeMode; status?: number },
 ): Response {
   const headers = createHeaders(options.mode, {
     "Content-Type": "application/json; charset=utf-8",
@@ -27,29 +45,11 @@ export function jsonResponse(
   const responseBody = options.method === "HEAD" ? null : JSON.stringify(body);
 
   return new Response(responseBody, {
-    status: options.status,
     headers,
+    status: options.status,
   });
 }
 
-export function methodNotAllowedResponse(allow: string[], mode: RuntimeMode): Response {
-  return jsonResponse(createApiError("Method not allowed", 405), {
-    mode,
-    status: 405,
-    headers: { Allow: allow.join(", ") },
-  });
-}
-
-export function allowsGetHead(method: string): boolean {
-  return method === "GET" || method === "HEAD";
-}
-
-export function formatDuration(ms: number): string {
-  if (ms >= 60000 && ms % 60000 === 0) return `${ms / 60000}m`;
-  if (ms >= 1000 && ms % 1000 === 0) return `${ms / 1000}s`;
-  return `${ms}ms`;
-}
-
 export function mapCheckResult(row: StoredCheckResult): CheckResult {
   let failure: CheckFailure | null = null;
   if (row.failure) {
@@ -62,18 +62,18 @@ export function mapCheckResult(row: StoredCheckResult): CheckResult {
   }
 
   return {
-    timestamp: row.timestamp,
-    matched: row.matched === 1,
     durationMs: row.duration_ms,
-    statusDetail: row.status_detail,
     failure,
+    matched: row.matched === 1,
+    statusDetail: row.status_detail,
+    timestamp: row.timestamp,
   };
 }
 
-export function createHealthResponse(): HealthResponse {
-  return {
-    ok: true,
-    service: "dial-server",
-    timestamp: new Date().toISOString(),
-  };
+export function methodNotAllowedResponse(allow: string[], mode: RuntimeMode): Response {
+  return jsonResponse(createApiError("Method not allowed", 405), {
+    headers: { Allow: allow.join(", ") },
+    mode,
+    status: 405,
+  });
 }