chore(格式): Prettier 统一到全仓，后端和契约一次性格式化

原来只有 `apps/web` 在 Prettier 下（配置在 `apps/web/.prettierrc.toml`、脚本在
web 的 package.json），后端和契约从来没格式化过 —— 手写在 100 列上下，`db/schema.ts`
还是 drizzle-kit pull 留下的 tab 缩进。两套口径分叉久了，跨端改一处就得记着「这边
什么风格」。

- 配置搬到根目录 `.prettierrc.toml`，内容不变（`semi=false`，其余全默认，
  printWidth 80 —— 和前端已有的格式一致，不另立一套宽度）；
- 脚本统一成根目录 `bun run fmt`，覆盖 `apps/*/src`、`apps/web/tests` 和两个构建
  配置；web 自己那份 `fmt` 和重复的 prettier 依赖删掉；
- `.prettierignore` 挡掉两类不该碰的：drizzle-kit 生成的 `src/db/meta/` 结构快照
  （它是 db:generate 的比对输入，只该由 drizzle-kit 写）、unplugin 每次 dev 都会
  重写的 `auto-imports.d.ts` / `components.d.ts`；
- 全量跑了一遍。纯格式，无行为改动：api typecheck / check:routes / check:ast、
  前端 type-check 全过，起 api 打了接口确认正常。前端这 39 个文件的小改动是
  prettier 版本漂移（类型断言的换行口径变了），不是新配置带来的。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/api/src/index.ts

@@ -44,16 +44,16 @@ app.route("/api", judgeServerRoutes)
 app.route("/api/admin", adminRoutes)
 
 app.onError((error, c) => {
-	console.error(error)
-	return c.json(
-		{ error: { code: "internal-error", message: "Internal server error" } },
-		500,
-	)
+  console.error(error)
+  return c.json(
+    { error: { code: "internal-error", message: "Internal server error" } },
+    500,
+  )
 })
 
 /** 头像取不到时的占位图，避免每个没设头像的学生都打一次 404 */
 const DEFAULT_AVATAR_SVG =
-	'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><rect width="128" height="128" rx="64" fill="#e2e8f0"/><circle cx="64" cy="48" r="24" fill="#94a3b8"/><path d="M20 120c4-28 22-42 44-42s40 14 44 42" fill="#94a3b8"/></svg>'
+  '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><rect width="128" height="128" rx="64" fill="#e2e8f0"/><circle cx="64" cy="48" r="24" fill="#94a3b8"/><path d="M20 120c4-28 22-42 44-42s40 14 44 42" fill="#94a3b8"/></svg>'
 
 /**
  * 伺服 /public 下的用户上传文件。
@@ -64,76 +64,92 @@ const DEFAULT_AVATAR_SVG =
  * 生产环境这些请求也走后端（Caddy 把 /public/* 整段反代过来），不让 Caddy 直接读盘：
  * 这样开发（Vite 代理）和生产是同一条代码路径，少一处只在服务器上才出错的差异。
  */
-async function serveUpload(pathname: string, prefix: string, directory: string) {
-	const decoded = decodeURIComponent(pathname)
-	const filename = basename(decoded)
-	if (!filename || filename !== decoded.slice(prefix.length + 1)) {
-		return new Response("Not found", { status: 404 })
-	}
-	const file = Bun.file(resolve(directory, filename))
-	if (await file.exists()) {
-		// 文件名由后端生成且内容不变，可以放心长缓存
-		return new Response(file, { headers: { "cache-control": "public, max-age=86400" } })
-	}
-	return null
+async function serveUpload(
+  pathname: string,
+  prefix: string,
+  directory: string,
+) {
+  const decoded = decodeURIComponent(pathname)
+  const filename = basename(decoded)
+  if (!filename || filename !== decoded.slice(prefix.length + 1)) {
+    return new Response("Not found", { status: 404 })
+  }
+  const file = Bun.file(resolve(directory, filename))
+  if (await file.exists()) {
+    // 文件名由后端生成且内容不变，可以放心长缓存
+    return new Response(file, {
+      headers: { "cache-control": "public, max-age=86400" },
+    })
+  }
+  return null
 }
 
 const server = Bun.serve<SubmissionSocketData>({
-	port: config.port,
-	async fetch(request, bunServer) {
-		const url = new URL(request.url)
-		if (url.pathname.startsWith(`${config.avatarUriPrefix}/`)) {
-			const hit = await serveUpload(url.pathname, config.avatarUriPrefix, config.avatarDirectory)
-			if (hit) return hit
-			if (basename(decodeURIComponent(url.pathname)) === "default.png") {
-				return new Response(DEFAULT_AVATAR_SVG, {
-					headers: { "content-type": "image/svg+xml", "cache-control": "public, max-age=3600" },
-				})
-			}
-			return new Response("Not found", { status: 404 })
-		}
-		// 题面里插的图片。原来没有这一段 —— 后台上传成功、返回 /public/upload/xxx，
-		// 但没有任何路由伺服它，题面图片一律 404。
-		if (url.pathname.startsWith(`${config.uploadUriPrefix}/`)) {
-			return (
-				(await serveUpload(url.pathname, config.uploadUriPrefix, config.uploadDirectory)) ??
-				new Response("Not found", { status: 404 })
-			)
-		}
-		if (
-			url.pathname === "/ws/submissions" ||
-			url.pathname === "/ws/config" ||
-			url.pathname === "/ws/collab"
-		) {
-			if (!isAllowedWebSocketOrigin(request.headers.get("origin"), url)) {
-				return new Response("Forbidden", { status: 403 })
-			}
-			const user = await getRequestSessionUser(request)
-			if (!user) return new Response("Unauthorized", { status: 401 })
-			const kind =
-				url.pathname === "/ws/config"
-					? "config"
-					: url.pathname === "/ws/collab"
-						? "collab"
-						: "submissions"
-			if (
-				bunServer.upgrade(request, {
-					data: {
-						userId: user.id,
-						kind,
-						token: readRequestSessionToken(request),
-						username: user.username,
-						adminType: user.adminType,
-					},
-				})
-			) {
-				return undefined
-			}
-			return new Response("WebSocket upgrade failed", { status: 400 })
-		}
-		return app.fetch(request)
-	},
-	websocket: submissionWebSocketHandler(),
+  port: config.port,
+  async fetch(request, bunServer) {
+    const url = new URL(request.url)
+    if (url.pathname.startsWith(`${config.avatarUriPrefix}/`)) {
+      const hit = await serveUpload(
+        url.pathname,
+        config.avatarUriPrefix,
+        config.avatarDirectory,
+      )
+      if (hit) return hit
+      if (basename(decodeURIComponent(url.pathname)) === "default.png") {
+        return new Response(DEFAULT_AVATAR_SVG, {
+          headers: {
+            "content-type": "image/svg+xml",
+            "cache-control": "public, max-age=3600",
+          },
+        })
+      }
+      return new Response("Not found", { status: 404 })
+    }
+    // 题面里插的图片。原来没有这一段 —— 后台上传成功、返回 /public/upload/xxx，
+    // 但没有任何路由伺服它，题面图片一律 404。
+    if (url.pathname.startsWith(`${config.uploadUriPrefix}/`)) {
+      return (
+        (await serveUpload(
+          url.pathname,
+          config.uploadUriPrefix,
+          config.uploadDirectory,
+        )) ?? new Response("Not found", { status: 404 })
+      )
+    }
+    if (
+      url.pathname === "/ws/submissions" ||
+      url.pathname === "/ws/config" ||
+      url.pathname === "/ws/collab"
+    ) {
+      if (!isAllowedWebSocketOrigin(request.headers.get("origin"), url)) {
+        return new Response("Forbidden", { status: 403 })
+      }
+      const user = await getRequestSessionUser(request)
+      if (!user) return new Response("Unauthorized", { status: 401 })
+      const kind =
+        url.pathname === "/ws/config"
+          ? "config"
+          : url.pathname === "/ws/collab"
+            ? "collab"
+            : "submissions"
+      if (
+        bunServer.upgrade(request, {
+          data: {
+            userId: user.id,
+            kind,
+            token: readRequestSessionToken(request),
+            username: user.username,
+            adminType: user.adminType,
+          },
+        })
+      ) {
+        return undefined
+      }
+      return new Response("WebSocket upgrade failed", { status: 400 })
+    }
+    return app.fetch(request)
+  },
+  websocket: submissionWebSocketHandler(),
 })
 
 await bridgeSubmissionEvents(server)