chore(frontend): wire lint+format into check gate, changelog (B1 done)

docs/CHANGELOG_web.md

@@ -10,6 +10,12 @@ The format loosely follows Keep a Changelog and can be adapted to the team's hab
 
 ### Added / 新增
 
+- Developer tooling: ESLint (flat config, typescript-eslint + react-hooks + jsx-a11y) and Prettier are now part of `npm run check` and CI; the whole codebase passes with zero eslint errors.
+- 开发工具链：ESLint（flat config，typescript-eslint + react-hooks + jsx-a11y）与 Prettier 纳入 `npm run check` 和 CI；全库 0 eslint error。
+
+- Lint toolchain note: TypeScript runs side-by-side (`typescript` = TS 6.0.2 JS API for tooling, `@typescript/native` = native 7.0.2 for `tsc`) because typescript-eslint does not support TS 7 yet; do not alias `typescript` to 7.x until typescript-eslint ships TS 7 support.
+- 工具链备注：TypeScript 双轨并存（`typescript` = TS 6.0.2 JS API 供 lint 工具链，`@typescript/native` = native 7.0.2 提供 `tsc`），因 typescript-eslint 暂不支持 TS 7；待其支持前勿把 `typescript` 别名改回 7.x。
+
 - CBZ reader is now chapter-scoped: a chapter's images flow as one continuous strip and scrolling stops at an 本章完 · 下一章 card (only chapter buttons / TOC / slider / bookmarks cross the boundary); a 连读 toggle makes scrolling flow across chapters, and a configurable 0–3-chapter prefetch pre-mounts upcoming chapters for instant switching — the old 连读/整页/适高 mode cycle is gone.
 - CBZ 阅读器改为以章为单位:一章图片是一段连续长卷,滚动止于「本章完 · 下一章」卡片(跨章只能靠章节按钮/目录/滑条/书签);「连读」开关让滑动贯穿章节,预读 0–3 章可配置、提前挂载解码实现切章零白屏;移除原 连读/整页/适高 三档循环。
 

frontend/package.json

@@ -8,7 +8,7 @@
     "dev": "vite",
     "build": "tsc --noEmit && vite build",
     "preview": "vite preview",
-    "check": "tsc --noEmit && vitest run && vite build",
+    "check": "tsc --noEmit && eslint . && prettier --check . && vitest run && vite build",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "format": "prettier --write .",