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/checker/config-loader.ts

@@ -1,11 +1,7 @@
-import type {
-  DefaultsConfig,
-  ProbeConfig,
-  ResolvedTarget,
-  EngineRuntimeConfig,
-  TargetConfig,
-} from "./types";
 import { dirname, resolve } from "node:path";
+
+import type { DefaultsConfig, EngineRuntimeConfig, ProbeConfig, ResolvedTarget, TargetConfig } from "./types";
+
 import { checkerRegistry } from "./runner";
 
 const DEFAULT_HOST = "127.0.0.1";
@@ -16,11 +12,11 @@ const DEFAULT_TIMEOUT = "10s";
 const DEFAULT_MAX_CONCURRENT_CHECKS = 20;
 
 export interface ResolvedConfig {
-  host: string;
-  port: number;
-  dataDir: string;
   configDir: string;
+  dataDir: string;
+  host: string;
   maxConcurrentChecks: number;
+  port: number;
   targets: ResolvedTarget[];
 }
 
@@ -32,7 +28,7 @@ export async function loadConfig(configPath: string): Promise<ResolvedConfig> {
   }
 
   const content = await file.text();
-  const raw = Bun.YAML.parse(content) as ProbeConfig | null;
+  const raw = Bun.YAML.parse(content) as null | ProbeConfig;
 
   if (!raw) {
     throw new Error("配置文件内容为空或格式无效");
@@ -61,21 +57,7 @@ export async function loadConfig(configPath: string): Promise<ResolvedConfig> {
     resolveTarget(target, defaults, defaultIntervalMs, defaultTimeoutMs, configDir),
   );
 
-  return { host, port, dataDir, configDir, maxConcurrentChecks, targets };
-}
-
-function validateRuntime(runtime: EngineRuntimeConfig): number {
-  if (runtime.maxConcurrentChecks === undefined) return DEFAULT_MAX_CONCURRENT_CHECKS;
-
-  if (
-    typeof runtime.maxConcurrentChecks !== "number" ||
-    !Number.isInteger(runtime.maxConcurrentChecks) ||
-    runtime.maxConcurrentChecks <= 0
-  ) {
-    throw new Error("runtime.maxConcurrentChecks 必须为正整数");
-  }
-
-  return runtime.maxConcurrentChecks;
+  return { configDir, dataDir, host, maxConcurrentChecks, port, targets };
 }
 
 function resolveTarget(
@@ -89,7 +71,7 @@ function resolveTarget(
   const timeoutMs = parseDuration(target.timeout ?? defaults.timeout ?? DEFAULT_TIMEOUT);
 
   const checker = checkerRegistry.get(target.type);
-  const result = checker.resolve(target, { defaults, configDir, defaultIntervalMs, defaultTimeoutMs });
+  const result = checker.resolve(target, { configDir, defaultIntervalMs, defaults, defaultTimeoutMs });
 
   result.intervalMs = intervalMs;
   result.timeoutMs = timeoutMs;
@@ -109,7 +91,7 @@ function validateConfig(config: ProbeConfig): void {
     const raw = config.targets[i] as unknown as Record<string, unknown>;
 
     const name = raw["name"];
-    if (!name || typeof name !== "string" || (name as string).trim() === "") {
+    if (!name || typeof name !== "string" || name.trim() === "") {
       throw new Error(`第 ${i + 1} 个 target 缺少 name 字段`);
     }
 
@@ -127,14 +109,28 @@ function validateConfig(config: ProbeConfig): void {
       throw new Error(`target "${name}" 的 group 字段必须为字符串`);
     }
 
-    if (names.has(name as string)) {
+    if (names.has(name)) {
       throw new Error(`target name 重复: "${name}"`);
     }
 
-    names.add(name as string);
+    names.add(name);
   }
 }
 
+function validateRuntime(runtime: EngineRuntimeConfig): number {
+  if (runtime.maxConcurrentChecks === undefined) return DEFAULT_MAX_CONCURRENT_CHECKS;
+
+  if (
+    typeof runtime.maxConcurrentChecks !== "number" ||
+    !Number.isInteger(runtime.maxConcurrentChecks) ||
+    runtime.maxConcurrentChecks <= 0
+  ) {
+    throw new Error("runtime.maxConcurrentChecks 必须为正整数");
+  }
+
+  return runtime.maxConcurrentChecks;
+}
+
 const DURATION_REGEX = /^(\d+(?:\.\d+)?)(ms|s|m)$/;
 
 export function parseDuration(value: string): number {