build(lint): 引入 ESLint 工具链与 flat config 最小规则集

- devDependencies: eslint 10 / typescript-eslint 8 / eslint-plugin-react-hooks 7 / globals / @eslint/js（ESLint 10 起 @eslint/js 不再随 eslint 自带，需显式安装）
- eslint.config.js：@eslint/js recommended + typescript-eslint recommended（非 type-checked）+ react-hooks recommended（v7 的 React Compiler 语义规则档整体关闭——57 处存量误报，保留经典 rules-of-hooks / exhaustive-deps 双规则）
- globals 分域：src/client → browser；src 根 / scripts / 根级 config → node；tests → node+browser
- reportUnusedDisableDirectives: error 揪孤儿豁免；no-unused-vars 对齐仓库既有 _ 前缀占位约定
- package.json 增加 lint script（eslint .）

package.json

@@ -82,7 +82,8 @@
     "test:mount": "bash scripts/e2e-mount.sh",
     "test:mount:aggregate": "bash scripts/e2e-aggregate-mount.sh",
     "clean": "node -e \"require('node:fs').rmSync('lib',{recursive:true,force:true})\"",
-    "check:consumer-types": "bash scripts/check-consumer-types.sh"
+    "check:consumer-types": "bash scripts/check-consumer-types.sh",
+    "lint": "eslint ."
   },
   "license": "MIT",
   "peerDependencies": {
@@ -179,6 +180,11 @@
     "tsdown": "^0.22.2",
     "typescript": "^5.6.0",
     "unrun": "^0.2.39",
-    "vitest": "^4.1.8"
+    "vitest": "^4.1.8",
+    "@eslint/js": "^10.0.1",
+    "eslint": "^10.9.1",
+    "eslint-plugin-react-hooks": "^7.1.1",
+    "globals": "^17.12.0",
+    "typescript-eslint": "^8.69.0"
   }
 }