Implement per-user post permissions and move stats into dedicated pages

2026-03-20 11:51:58 +08:00
parent 17f5f6adcb
commit 466b7c3fb6
29 changed files with 1416 additions and 475 deletions
--- a/app/admin/edit/[slug]/page.tsx
+++ b/app/admin/edit/[slug]/page.tsx
@@ -1,32 +1,32 @@
-import { getDb } from "@/lib/mongo";
+import { cookies } from "next/headers";
 import { notFound } from "next/navigation";
 import { EditPostForm } from "@/components/EditPostForm";
+import { cookieName, verifySession } from "@/lib/auth";
+import { getDb } from "@/lib/mongo";
+import { canEditPost, serializePost } from "@/lib/posts";
 import { Post } from "@/types/post";
-import { DEFAULT_OPC_SIGNAL } from "@/lib/opc";

 export const dynamic = "force-dynamic";

-async function fetchPost(slug: string): Promise<Post | null> {
+async function fetchPost(
+  slug: string,
+  session: Awaited<ReturnType<typeof verifySession>>
+): Promise<Post | null> {
  const db = await getDb();
  const post = await db.collection("posts").findOne({ slug });
-  if (!post) return null;
-  return {
-    _id: post._id?.toString(),
-    title: post.title ?? "",
-    slug: post.slug ?? slug,
-    markdown: post.markdown ?? "",
-    cover: post.cover,
-    tags: post.tags ?? [],
-    signal: post.signal ?? DEFAULT_OPC_SIGNAL,
-    author: post.author ?? "佚名",
-    createdAt: post.createdAt ?? new Date().toISOString(),
-    updatedAt: post.updatedAt ?? post.createdAt ?? new Date().toISOString(),
-    views: post.views ?? 0
-  };
+
+  if (!post || !canEditPost(post, session)) {
+    return null;
+  }
+
+  return serializePost(post);
 }

 export default async function EditPostPage({ params }: { params: { slug: string } }) {
-  const post = await fetchPost(params.slug);
+  const token = cookies().get(cookieName)?.value;
+  const session = await verifySession(token);
+  const post = await fetchPost(params.slug, session);
+
  if (!post) {
    notFound();
  }
--- a/app/admin/page.tsx
+++ b/app/admin/page.tsx
@@ -1,264 +1,181 @@
-import { CreatePostForm } from "@/components/CreatePostForm";
+import { cookies } from "next/headers";
 import { AdminPostList } from "@/components/AdminPostList";
+import { AdminUserManager } from "@/components/AdminUserManager";
+import { CreatePostForm } from "@/components/CreatePostForm";
+import { cookieName, isAdminSession, verifySession } from "@/lib/auth";
 import { getDb } from "@/lib/mongo";
+import { buildOwnedPostFilter, serializePost } from "@/lib/posts";
+import { findUserById, getEffectiveDailyPostLimit, getShanghaiDayRange } from "@/lib/users";

 export const dynamic = "force-dynamic";

-const cardClass =
-  "rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100 transition-[transform,box-shadow] duration-300 will-change-transform transform-gpu hover:shadow-lg hover:[transform:perspective(900px)_translateY(-4px)_rotateX(2deg)_rotateY(-2deg)]";
+type ManagedUser = {
+  id: string;
+  username: string;
+  displayName: string;
+  role: "admin" | "user";
+  dailyPostLimit: number;
+  postCount: number;
+  todayPostCount: number;
+  posts: Array<{ slug: string; title: string; createdAt: string }>;
+};

-async function fetchStats() {
-  const db = await getDb();
-  const collection = db.collection("posts");
-  const total = await collection.countDocuments();
-  const latest = await collection
-    .find({}, { projection: { title: 1, createdAt: 1 } })
-    .sort({ createdAt: -1 })
-    .limit(1)
-    .toArray();
-  const top = await collection
-    .find({}, { projection: { title: 1, views: 1, slug: 1 } })
-    .sort({ views: -1 })
-    .limit(3)
-    .toArray();
-  const viewsAgg = await collection
-    .aggregate([{ $group: { _id: null, totalViews: { $sum: { $ifNull: ["$views", 0] } } } }])
-    .toArray();
-  const totalViews = viewsAgg[0]?.totalViews ?? 0;
-  const avgViews = total > 0 ? Math.round(totalViews / total) : 0;
-  const tagCount = (await collection.distinct("tags")).filter(Boolean).length;
-  const authorCount = (await collection.distinct("author")).filter(Boolean).length;
-
-  return {
-    total,
-    latest: latest[0] || null,
-    top,
-    totalViews,
-    avgViews,
-    tagCount,
-    authorCount
-  };
-}
-
-async function fetchRecentPosts() {
+async function fetchRecentPosts(session: Awaited<ReturnType<typeof verifySession>>) {
  const db = await getDb();
  const posts = await db
    .collection("posts")
-    .find({}, { projection: { markdown: 0 } })
+    .find(buildOwnedPostFilter(session), { projection: { markdown: 0 } })
    .sort({ createdAt: -1 })
    .limit(20)
    .toArray();
-  return posts.map((p: any) => ({
-    ...p,
-    _id: p._id?.toString(),
-    author: p.author ?? "佚名",
-    createdAtText: new Date(p.createdAt).toLocaleString("zh-CN", {
+
+  return posts.map((post: any) => ({
+    ...serializePost(post),
+    createdAtText: new Date(post.createdAt).toLocaleString("zh-CN", {
      hour12: false,
      timeZone: "Asia/Shanghai"
    })
  }));
 }

-async function fetchAllTags() {
+async function fetchAvailableTags(session: Awaited<ReturnType<typeof verifySession>>) {
  const db = await getDb();
  const tags = await db
    .collection("posts")
    .aggregate([
+      { $match: buildOwnedPostFilter(session) },
      { $unwind: "$tags" },
      { $group: { _id: "$tags", count: { $sum: 1 } } },
      { $sort: { count: -1, _id: 1 } }
    ])
    .toArray();
-  return tags.map((t: any) => t._id).filter(Boolean);
+
+  return tags.map((item: any) => item._id).filter(Boolean);
 }

-async function fetchTagStats() {
-  const db = await getDb();
-  const tags = await db
-    .collection("posts")
-    .aggregate([
-      { $unwind: "$tags" },
-      { $group: { _id: "$tags", count: { $sum: 1 } } },
-      { $sort: { count: -1, _id: 1 } },
-      { $limit: 12 }
-    ])
-    .toArray();
-  return tags.map((t: any) => ({ tag: t._id, count: t.count }));
+async function fetchPublishQuota(session: Awaited<ReturnType<typeof verifySession>>) {
+  const user = await findUserById(session?.uid);
+  const limit = getEffectiveDailyPostLimit(user || undefined);
+  const { startIso, endIso } = getShanghaiDayRange();
+  const todayCount = session?.uid
+    ? await getDb().then((db) =>
+        db.collection("posts").countDocuments({
+          ownerId: session.uid,
+          createdAt: { $gte: startIso, $lt: endIso }
+        })
+      )
+    : 0;
+
+  return { limit, todayCount };
 }

-async function fetchAuthorStats() {
+async function fetchManagedUsers(): Promise<ManagedUser[]> {
  const db = await getDb();
-  const authors = await db
-    .collection("posts")
-    .aggregate([
-      { $group: { _id: { $ifNull: ["$author", "佚名"] }, count: { $sum: 1 } } },
-      { $sort: { count: -1, _id: 1 } },
-      { $limit: 10 }
-    ])
+  const { startIso, endIso } = getShanghaiDayRange();
+  const users = await db
+    .collection("users")
+    .find(
+      {},
+      {
+        projection: {
+          username: 1,
+          displayName: 1,
+          role: 1,
+          dailyPostLimit: 1
+        }
+      }
+    )
+    .sort({ createdAt: 1 })
    .toArray();
-  return authors.map((a: any) => ({ author: a._id, count: a.count }));
-}

-async function fetchDailyStats() {
-  const db = await getDb();
-  const now = new Date();
-  const days: { key: string; label: string }[] = [];
-  for (let i = 6; i >= 0; i -= 1) {
-    const d = new Date(now);
-    d.setDate(now.getDate() - i);
-    const key = d.toISOString().slice(0, 10);
-    const label = `${d.getMonth() + 1}/${d.getDate()}`;
-    days.push({ key, label });
-  }
-  const since = `${days[0].key}T00:00:00.000Z`;
-  const raw = await db
+  const posts = await db
    .collection("posts")
-    .aggregate([
-      { $match: { createdAt: { $gte: since } } },
-      { $addFields: { day: { $dateToString: { format: "%Y-%m-%d", date: { $toDate: "$createdAt" } } } } },
-      { $group: { _id: "$day", count: { $sum: 1 } } }
-    ])
+    .find({}, { projection: { slug: 1, title: 1, createdAt: 1, ownerId: 1, author: 1 } })
+    .sort({ createdAt: -1 })
    .toArray();
-  const map = new Map<string, number>();
-  raw.forEach((item: any) => map.set(item._id, item.count));
-  return days.map((d) => ({ label: d.label, count: map.get(d.key) ?? 0 }));
+
+  const authorToUserId = new Map<string, string>();
+  users.forEach((user: any) => {
+    const id = user._id?.toString();
+    if (!id) return;
+    if (user.username) authorToUserId.set(String(user.username).trim().toLowerCase(), id);
+    if (user.displayName) authorToUserId.set(String(user.displayName).trim().toLowerCase(), id);
+  });
+
+  const postCountMap = new Map<string, number>();
+  const todayCountMap = new Map<string, number>();
+  const postsByOwner = new Map<string, Array<{ slug: string; title: string; createdAt: string }>>();
+
+  posts.forEach((post: any) => {
+    const resolvedOwnerId =
+      post.ownerId || authorToUserId.get(String(post.author || "").trim().toLowerCase());
+    if (!resolvedOwnerId) return;
+
+    const list = postsByOwner.get(resolvedOwnerId) ?? [];
+    list.push({
+      slug: post.slug,
+      title: post.title ?? "未命名",
+      createdAt: post.createdAt ?? new Date().toISOString()
+    });
+    postsByOwner.set(resolvedOwnerId, list);
+    postCountMap.set(resolvedOwnerId, (postCountMap.get(resolvedOwnerId) ?? 0) + 1);
+
+    if (post.createdAt >= startIso && post.createdAt < endIso) {
+      todayCountMap.set(resolvedOwnerId, (todayCountMap.get(resolvedOwnerId) ?? 0) + 1);
+    }
+  });
+
+  return users
+    .map((user: any) => {
+      const id = user._id?.toString();
+      if (!id) return null;
+
+      return {
+        id,
+        username: user.username ?? "",
+        displayName: user.displayName ?? user.username ?? "",
+        role: user.role === "admin" ? "admin" : "user",
+        dailyPostLimit: getEffectiveDailyPostLimit(user),
+        postCount: postCountMap.get(id) ?? 0,
+        todayPostCount: todayCountMap.get(id) ?? 0,
+        posts: postsByOwner.get(id) ?? []
+      };
+    })
+    .filter(Boolean) as ManagedUser[];
 }

 export default async function AdminPage() {
-  const stats = await fetchStats();
-  const recentPosts = await fetchRecentPosts();
-  const availableTags = await fetchAllTags();
-  const tagStats = await fetchTagStats();
-  const authorStats = await fetchAuthorStats();
-  const dailyStats = await fetchDailyStats();
-  const tagMax = Math.max(...tagStats.map((t) => t.count), 1);
-  const authorMax = Math.max(...authorStats.map((a) => a.count), 1);
-  const dailyMax = Math.max(...dailyStats.map((d) => d.count), 1);
+  const token = cookies().get(cookieName)?.value;
+  const session = await verifySession(token);
+  const adminView = isAdminSession(session);
+
+  const [recentPosts, availableTags, publishQuota, managedUsers] = await Promise.all([
+    fetchRecentPosts(session),
+    fetchAvailableTags(session),
+    fetchPublishQuota(session),
+    adminView ? fetchManagedUsers() : Promise.resolve([] as ManagedUser[])
+  ]);

  return (
    <div className="space-y-6">
-      <section className="grid gap-4 sm:grid-cols-3">
-        <div className={cardClass}>
-          <p className="text-sm text-slate-500">总内容数</p>
-          <p className="mt-1 text-3xl font-semibold">{stats.total}</p>
-        </div>
-        <div className={cardClass}>
-          <p className="text-sm text-slate-500">最新发布</p>
-          <p className="mt-1 text-base font-semibold">{stats.latest?.title ?? "暂无"}</p>
-          <p className="text-xs text-slate-500">
-            {stats.latest?.createdAt
-              ? new Date(stats.latest.createdAt).toLocaleString("zh-CN", { hour12: false })
-              : ""}
+      <section className="rounded-2xl bg-white/80 p-5 shadow-sm ring-1 ring-slate-100">
+        <div className="space-y-2">
+          <h1 className="text-2xl font-semibold text-slate-900">内容后台</h1>
+          <p className="text-sm text-slate-500">
+            登录用户只能发布和修改自己的内容；删除内容、删除用户和设置发布额度仅管理员可操作。
          </p>
        </div>
-        <div className={cardClass}>
-          <p className="text-sm text-slate-500">Top 阅读</p>
-          <ul className="mt-1 space-y-1 text-sm">
-            {stats.top.map((item: any) => (
-              <li key={item.slug} className="flex items-center justify-between">
-                <span className="truncate">{item.title}</span>
-                <span className="text-slate-500">{item.views ?? 0} 阅读</span>
-              </li>
-            ))}
-          </ul>
-        </div>
      </section>

-      <section className="rounded-2xl bg-white/80 p-5 shadow-sm ring-1 ring-slate-100">
-        <h3 className="text-lg font-semibold">统计面板</h3>
-        <div className="mt-4 grid gap-3 sm:grid-cols-2 lg:grid-cols-4">
-          <div className={cardClass}>
-            <p className="text-sm text-slate-500">总阅读</p>
-            <p className="mt-1 text-2xl font-semibold">{stats.totalViews}</p>
-          </div>
-          <div className={cardClass}>
-            <p className="text-sm text-slate-500">平均阅读</p>
-            <p className="mt-1 text-2xl font-semibold">{stats.avgViews}</p>
-          </div>
-          <div className={cardClass}>
-            <p className="text-sm text-slate-500">标签数量</p>
-            <p className="mt-1 text-2xl font-semibold">{stats.tagCount}</p>
-          </div>
-          <div className={cardClass}>
-            <p className="text-sm text-slate-500">作者数量</p>
-            <p className="mt-1 text-2xl font-semibold">{stats.authorCount}</p>
-          </div>
-        </div>
+      <CreatePostForm
+        availableTags={availableTags}
+        publishLimit={publishQuota.limit}
+        todayCount={publishQuota.todayCount}
+      />

-        <div className="mt-6 grid gap-4 lg:grid-cols-2">
-          <div className="rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100">
-            <h4 className="text-sm font-semibold text-slate-700">标签分布</h4>
-            <div className="mt-3 space-y-3">
-              {tagStats.length === 0 ? (
-                <p className="text-xs text-slate-500">暂无标签数据</p>
-              ) : (
-                tagStats.map((item) => (
-                  <div key={item.tag} className="space-y-1">
-                    <div className="flex items-center justify-between text-xs text-slate-600">
-                      <span>#{item.tag}</span>
-                      <span>{item.count}</span>
-                    </div>
-                    <div className="h-2 rounded-full bg-slate-100">
-                      <div
-                        className="h-2 rounded-full bg-brand-500/80"
-                        style={{ width: `${(item.count / tagMax) * 100}%` }}
-                      />
-                    </div>
-                  </div>
-                ))
-              )}
-            </div>
-          </div>
+      <AdminPostList initialPosts={recentPosts} canDelete={false} />

-          <div className="rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100">
-            <h4 className="text-sm font-semibold text-slate-700">作者分布</h4>
-            <div className="mt-3 space-y-3">
-              {authorStats.length === 0 ? (
-                <p className="text-xs text-slate-500">暂无作者数据</p>
-              ) : (
-                authorStats.map((item) => (
-                  <div key={item.author} className="space-y-1">
-                    <div className="flex items-center justify-between text-xs text-slate-600">
-                      <span>{item.author}</span>
-                      <span>{item.count}</span>
-                    </div>
-                    <div className="h-2 rounded-full bg-slate-100">
-                      <div
-                        className="h-2 rounded-full bg-indigo-500/80"
-                        style={{ width: `${(item.count / authorMax) * 100}%` }}
-                      />
-                    </div>
-                  </div>
-                ))
-              )}
-            </div>
-          </div>
-        </div>
-
-        <div className="mt-6 rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100">
-          <h4 className="text-sm font-semibold text-slate-700">近 7 天发布</h4>
-          <div className="mt-3 space-y-3">
-            {dailyStats.map((item) => (
-              <div key={item.label} className="space-y-1">
-                <div className="flex items-center justify-between text-xs text-slate-600">
-                  <span>{item.label}</span>
-                  <span>{item.count}</span>
-                </div>
-                <div className="h-2 rounded-full bg-slate-100">
-                  <div
-                    className="h-2 rounded-full bg-emerald-500/80"
-                    style={{ width: `${(item.count / dailyMax) * 100}%` }}
-                  />
-                </div>
-              </div>
-            ))}
-          </div>
-        </div>
-      </section>
-
-      <CreatePostForm availableTags={availableTags} />
-
-      <AdminPostList initialPosts={recentPosts} />
+      {adminView ? <AdminUserManager initialUsers={managedUsers} currentUserId={session?.uid || ""} /> : null}
    </div>
  );
 }
--- a/app/api/admin/stats/route.ts
+++ b/app/api/admin/stats/route.ts
@@ -1,16 +1,27 @@
-import { NextResponse } from "next/server";
-import { getDb } from "@/lib/mongo";
+import { NextRequest, NextResponse } from "next/server";
+import { cookieName, isAdminSession, verifySession } from "@/lib/auth";
+import { buildOwnedPostFilter } from "@/lib/posts";
+import { fetchAuthorBreakdown, fetchDailyStats, fetchStatsSummary, fetchTagStats } from "@/lib/stats";

-export async function GET() {
-  const db = await getDb();
-  const collection = db.collection("posts");
-  const total = await collection.countDocuments();
-  const latest = await collection.find({}, { projection: { title: 1, createdAt: 1 } }).sort({ createdAt: -1 }).limit(1).toArray();
-  const top = await collection.find({}, { projection: { title: 1, views: 1, slug: 1 } }).sort({ views: -1 }).limit(3).toArray();
+export async function GET(req: NextRequest) {
+  const token = req.cookies.get(cookieName)?.value;
+  const session = await verifySession(token);
+  const personalFilter = buildOwnedPostFilter(session);
+  const adminView = isAdminSession(session);
+
+  const [mine, overall, myTags, myDaily, authors] = await Promise.all([
+    fetchStatsSummary(personalFilter),
+    fetchStatsSummary({}),
+    fetchTagStats(personalFilter, 8),
+    fetchDailyStats(personalFilter, 7),
+    adminView ? fetchAuthorBreakdown() : Promise.resolve([])
+  ]);

  return NextResponse.json({
-    total,
-    latest: latest[0] || null,
-    top
+    mine,
+    overall,
+    myTags,
+    myDaily,
+    authors
  });
 }
--- a/app/api/admin/users/[userId]/route.ts
+++ b/app/api/admin/users/[userId]/route.ts
@@ -0,0 +1,86 @@
+import { NextRequest, NextResponse } from "next/server";
+import { ObjectId } from "mongodb";
+import { z } from "zod";
+import { cookieName, isAdminSession, verifySession } from "@/lib/auth";
+import { getDb } from "@/lib/mongo";
+import { DEFAULT_DAILY_POST_LIMIT } from "@/lib/users";
+
+async function requireAdmin(req: NextRequest) {
+  const token = req.cookies.get(cookieName)?.value;
+  const session = await verifySession(token);
+  if (!isAdminSession(session)) {
+    return null;
+  }
+  return session;
+}
+
+export async function PATCH(req: NextRequest, { params }: { params: { userId: string } }) {
+  const session = await requireAdmin(req);
+  if (!session) {
+    return NextResponse.json({ error: "未授权" }, { status: 401 });
+  }
+  if (!ObjectId.isValid(params.userId)) {
+    return NextResponse.json({ error: "用户 ID 无效" }, { status: 400 });
+  }
+
+  const body = await req.json().catch(() => ({}));
+  const schema = z.object({
+    dailyPostLimit: z.number().int().min(0).max(1000)
+  });
+  const parsed = schema.safeParse(body);
+  if (!parsed.success) {
+    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
+  }
+
+  const db = await getDb();
+  const result = await db.collection("users").updateOne(
+    { _id: new ObjectId(params.userId) },
+    { $set: { dailyPostLimit: parsed.data.dailyPostLimit } }
+  );
+  if (result.matchedCount === 0) {
+    return NextResponse.json({ error: "用户不存在" }, { status: 404 });
+  }
+
+  return NextResponse.json({
+    ok: true,
+    dailyPostLimit: parsed.data.dailyPostLimit ?? DEFAULT_DAILY_POST_LIMIT
+  });
+}
+
+export async function DELETE(req: NextRequest, { params }: { params: { userId: string } }) {
+  const session = await requireAdmin(req);
+  if (!session) {
+    return NextResponse.json({ error: "未授权" }, { status: 401 });
+  }
+  if (!ObjectId.isValid(params.userId)) {
+    return NextResponse.json({ error: "用户 ID 无效" }, { status: 400 });
+  }
+  if (session.uid === params.userId) {
+    return NextResponse.json({ error: "不能删除当前登录的管理员账号" }, { status: 400 });
+  }
+
+  const db = await getDb();
+  const user = await db.collection("users").findOne({ _id: new ObjectId(params.userId) });
+  if (!user) {
+    return NextResponse.json({ error: "用户不存在" }, { status: 404 });
+  }
+
+  await db.collection("posts").deleteMany({
+    $or: [
+      { ownerId: params.userId },
+      {
+        $and: [
+          { $or: [{ ownerId: { $exists: false } }, { ownerId: null }] },
+          {
+            author: {
+              $in: [user.displayName, user.username].filter(Boolean)
+            }
+          }
+        ]
+      }
+    ]
+  });
+  await db.collection("users").deleteOne({ _id: new ObjectId(params.userId) });
+
+  return NextResponse.json({ ok: true });
+}
--- a/app/api/login/route.ts
+++ b/app/api/login/route.ts
@@ -1,8 +1,8 @@
 import { NextRequest, NextResponse } from "next/server";
-import { signSession, cookieName } from "@/lib/auth";
+import { z } from "zod";
+import { signSession, cookieName, isAdminName } from "@/lib/auth";
 import { getDb } from "@/lib/mongo";
 import { verifyPassword } from "@/lib/password";
-import { z } from "zod";

 export async function POST(req: NextRequest) {
  const body = await req.json().catch(() => ({}));
@@ -13,7 +13,7 @@ export async function POST(req: NextRequest) {
  const parsed = schema.safeParse(body);

  if (!parsed.success) {
-    return NextResponse.json({ error: "请输入正确的用户名与密码" }, { status: 400 });
+    return NextResponse.json({ error: "用户名或密码格式不正确" }, { status: 400 });
  }

  const { username, password } = parsed.data;
@@ -29,13 +29,20 @@ export async function POST(req: NextRequest) {
  }

  const name = user.displayName || user.username || username;
+  const role =
+    user.role === "admin" || user.role === "user"
+      ? user.role
+      : isAdminName(user.username) || isAdminName(name)
+        ? "admin"
+        : "user";
  const exp = Date.now() + 24 * 60 * 60 * 1000;
  const token = await signSession({
-    role: "admin",
+    role,
    iat: Date.now(),
    exp,
    uid: user._id?.toString(),
-    name
+    name,
+    username: user.username || username
  });
  const res = NextResponse.json({ ok: true, name });
  res.cookies.set(cookieName, token, {
--- a/app/api/posts/[slug]/route.ts
+++ b/app/api/posts/[slug]/route.ts
@@ -1,29 +1,30 @@
 import { NextRequest, NextResponse } from "next/server";
-import { getDb } from "@/lib/mongo";
-import { ObjectId } from "mongodb";
 import { z } from "zod";
+import { cookieName, verifySession } from "@/lib/auth";
+import { getDb } from "@/lib/mongo";
 import { OPC_SIGNAL_VALUES } from "@/lib/opc";
+import { canDeletePost, canEditPost, serializePost } from "@/lib/posts";
+
+async function getSessionFromRequest(req: NextRequest) {
+  const token = req.cookies.get(cookieName)?.value;
+  return verifySession(token);
+}

 export async function GET(_: NextRequest, { params }: { params: { slug: string } }) {
  const db = await getDb();
-  const post = await db.collection("posts").findOneAndUpdate(
-    { slug: params.slug },
-    { $inc: { views: 1 } },
-    { returnDocument: "after" }
-  );
+  const post = await db.collection("posts").findOne({ slug: params.slug });

-  if (!post || !post.value) {
-    return NextResponse.json({ error: "Not found" }, { status: 404 });
+  if (!post) {
+    return NextResponse.json({ error: "内容不存在" }, { status: 404 });
  }

-  return NextResponse.json({
-    ...post.value,
-    author: post.value.author ?? "佚名",
-    _id: (post.value._id as ObjectId)?.toString()
-  });
+  await db.collection("posts").updateOne({ _id: post._id }, { $inc: { views: 1 } });
+  return NextResponse.json(serializePost({ ...post, views: (post.views ?? 0) + 1 }));
 }

 export async function PATCH(req: NextRequest, { params }: { params: { slug: string } }) {
+  const session = await getSessionFromRequest(req);
+  const db = await getDb();
  const body = await req.json().catch(() => ({}));
  const schema = z.object({
    title: z.string().min(2).max(80).optional(),
@@ -37,6 +38,14 @@ export async function PATCH(req: NextRequest, { params }: { params: { slug: stri
    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
  }

+  const existingPost = await db.collection("posts").findOne({ slug: params.slug });
+  if (!existingPost) {
+    return NextResponse.json({ error: "内容不存在" }, { status: 404 });
+  }
+  if (!canEditPost(existingPost, session)) {
+    return NextResponse.json({ error: "只能修改自己发布的内容" }, { status: 403 });
+  }
+
  const data = parsed.data;
  const set: Record<string, unknown> = {
    updatedAt: new Date().toISOString()
@@ -54,21 +63,26 @@ export async function PATCH(req: NextRequest, { params }: { params: { slug: stri
  if (typeof data.signal === "string") set.signal = data.signal;

  const update: Record<string, unknown> = { $set: set };
-  if (Object.keys(unset).length > 0) update.$unset = unset;
-
-  const db = await getDb();
-  const result = await db.collection("posts").updateOne({ slug: params.slug }, update);
-  if (result.matchedCount === 0) {
-    return NextResponse.json({ error: "Not found" }, { status: 404 });
+  if (Object.keys(unset).length > 0) {
+    update.$unset = unset;
  }
+
+  await db.collection("posts").updateOne({ _id: existingPost._id }, update);
  return NextResponse.json({ ok: true });
 }

-export async function DELETE(_: NextRequest, { params }: { params: { slug: string } }) {
+export async function DELETE(req: NextRequest, { params }: { params: { slug: string } }) {
+  const session = await getSessionFromRequest(req);
  const db = await getDb();
-  const result = await db.collection("posts").deleteOne({ slug: params.slug });
-  if (result.deletedCount === 0) {
-    return NextResponse.json({ error: "Not found" }, { status: 404 });
+  const existingPost = await db.collection("posts").findOne({ slug: params.slug });
+
+  if (!existingPost) {
+    return NextResponse.json({ error: "内容不存在" }, { status: 404 });
  }
+  if (!canDeletePost(existingPost, session)) {
+    return NextResponse.json({ error: "只有管理员可以删除内容" }, { status: 403 });
+  }
+
+  await db.collection("posts").deleteOne({ _id: existingPost._id });
  return NextResponse.json({ ok: true });
 }
--- a/app/api/posts/route.ts
+++ b/app/api/posts/route.ts
@@ -1,9 +1,10 @@
 import { NextRequest, NextResponse } from "next/server";
-import { getDb } from "@/lib/mongo";
 import { z } from "zod";
-import { generateSlug } from "@/lib/slug";
-import { DEFAULT_OPC_SIGNAL, OPC_SIGNAL_VALUES } from "@/lib/opc";
 import { cookieName, verifySession } from "@/lib/auth";
+import { getDb } from "@/lib/mongo";
+import { DEFAULT_OPC_SIGNAL, OPC_SIGNAL_VALUES } from "@/lib/opc";
+import { generateSlug } from "@/lib/slug";
+import { findUserById, getEffectiveDailyPostLimit, getShanghaiDayRange } from "@/lib/users";

 const postSchema = z.object({
  title: z.string().min(2).max(80),
@@ -23,10 +24,10 @@ export async function GET() {
    .toArray();

  return NextResponse.json(
-    posts.map((p) => ({
-      ...p,
-      author: p.author ?? "佚名",
-      _id: p._id?.toString()
+    posts.map((post) => ({
+      ...post,
+      author: post.author ?? "匿名",
+      _id: post._id?.toString()
    }))
  );
 }
@@ -39,36 +40,53 @@ export async function POST(req: NextRequest) {
    return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
  }

-  const data = parsed.data;
  const token = req.cookies.get(cookieName)?.value;
  const session = await verifySession(token);
-  if (!session) {
-    return NextResponse.json({ error: "未登录" }, { status: 401 });
+  if (!session?.uid) {
+    return NextResponse.json({ error: "请先登录后再发布" }, { status: 401 });
  }
-  const author = session.name ?? "佚名";
+
+  const user = await findUserById(session.uid);
+  if (!user) {
+    return NextResponse.json({ error: "用户不存在或已被删除" }, { status: 401 });
+  }
+
+  const limit = getEffectiveDailyPostLimit(user);
+  const { startIso, endIso } = getShanghaiDayRange();
+  const db = await getDb();
+  const todayCount = await db.collection("posts").countDocuments({
+    ownerId: session.uid,
+    createdAt: { $gte: startIso, $lt: endIso }
+  });
+  if (todayCount >= limit) {
+    return NextResponse.json({ error: `今日发布数量已达到上限（${limit}）` }, { status: 429 });
+  }
+
+  const data = parsed.data;
+  const author = session.name ?? "匿名";
  const now = new Date().toISOString();
  let slug = generateSlug();
-  const db = await getDb();

  for (let attempt = 0; attempt < 5; attempt += 1) {
    const exists = await db.collection("posts").findOne({ slug });
    if (!exists) break;
    slug = generateSlug();
  }
+
  const existsAfter = await db.collection("posts").findOne({ slug });
  if (existsAfter) {
-    return NextResponse.json({ error: "Failed to allocate slug" }, { status: 500 });
+    return NextResponse.json({ error: "生成内容标识失败" }, { status: 500 });
  }

-  const doc = {
+  await db.collection("posts").insertOne({
    ...data,
    author,
+    ownerId: session.uid,
    slug,
    createdAt: now,
    updatedAt: now,
    views: 0
-  };
+  });

-  await db.collection("posts").insertOne(doc);
-  return NextResponse.json({ ok: true, slug });
+  return NextResponse.json({ ok: true, slug, todayCount: todayCount + 1, limit });
 }
--- a/app/api/register/route.ts
+++ b/app/api/register/route.ts
@@ -1,8 +1,9 @@
 import { NextRequest, NextResponse } from "next/server";
+import { z } from "zod";
+import { signSession, cookieName, isAdminName } from "@/lib/auth";
+import { DEFAULT_DAILY_POST_LIMIT } from "@/lib/users";
 import { getDb } from "@/lib/mongo";
 import { hashPassword } from "@/lib/password";
-import { signSession, cookieName } from "@/lib/auth";
-import { z } from "zod";

 export async function POST(req: NextRequest) {
  const body = await req.json().catch(() => ({}));
@@ -13,11 +14,13 @@ export async function POST(req: NextRequest) {
  });
  const parsed = schema.safeParse(body);
  if (!parsed.success) {
-    return NextResponse.json({ error: "请填写有效的用户名与密码" }, { status: 400 });
+    return NextResponse.json({ error: "用户名或密码格式不正确" }, { status: 400 });
  }

  const { username, password, displayName } = parsed.data;
  const usernameLower = username.toLowerCase();
+  const resolvedDisplayName = displayName || username;
+  const role = isAdminName(username) || isAdminName(resolvedDisplayName) ? "admin" : "user";
  const db = await getDb();

  const exists = await db.collection("users").findOne({ usernameLower });
@@ -30,7 +33,9 @@ export async function POST(req: NextRequest) {
  const doc = {
    username,
    usernameLower,
-    displayName: displayName || username,
+    displayName: resolvedDisplayName,
+    role,
+    dailyPostLimit: DEFAULT_DAILY_POST_LIMIT,
    passwordHash: hash,
    passwordSalt: salt,
    createdAt: now
@@ -41,11 +46,12 @@ export async function POST(req: NextRequest) {
  const name = doc.displayName;
  const exp = Date.now() + 24 * 60 * 60 * 1000;
  const token = await signSession({
-    role: "admin",
+    role,
    iat: Date.now(),
    exp,
    uid: result.insertedId?.toString(),
-    name
+    name,
+    username
  });
  const res = NextResponse.json({ ok: true, name });
  res.cookies.set(cookieName, token, {
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -3,17 +3,17 @@ import type { Metadata } from "next";
 import Link from "next/link";
 import { ReactNode } from "react";
 import { cookies } from "next/headers";
-import { cookieName, getAdminName, verifySession } from "@/lib/auth";
+import { cookieName, verifySession } from "@/lib/auth";

 export const metadata: Metadata = {
  title: "OPC Solo Feed",
-  description: "轻量信息流发布平台，支持 Markdown 与多端浏览。"
+  description: "一个支持公开浏览、用户发布和个人管理的轻量信息流。"
 };

 export default async function RootLayout({ children }: { children: ReactNode }) {
  const token = cookies().get(cookieName)?.value;
  const session = await verifySession(token);
-  const userName = session?.name ?? getAdminName();
+  const userName = session?.name ?? "访客";

  return (
    <html lang="zh-CN">
@@ -24,8 +24,9 @@ export default async function RootLayout({ children }: { children: ReactNode })
              <span className="rounded-xl bg-brand-100 px-2 py-1 text-xs font-bold uppercase text-brand-700">
                Solo
              </span>
-              <span>solo-feed</span>
+              <span>信息流</span>
            </Link>
+
            <div className="flex items-center gap-3 text-sm text-slate-600">
              <nav className="flex items-center gap-3">
                <Link href="/" className="hover:text-brand-600">
@@ -34,28 +35,42 @@ export default async function RootLayout({ children }: { children: ReactNode })
                <Link href="/tags" className="hover:text-brand-600">
                  标签
                </Link>
+                <Link href="/stats" className="hover:text-brand-600">
+                  统计
+                </Link>
                <Link href="/admin" className="hover:text-brand-600">
                  后台
                </Link>
              </nav>
+
              {session ? (
                <span className="rounded-full bg-slate-100 px-3 py-1 text-xs font-medium text-slate-700">
                  {userName}
                </span>
              ) : (
-                <Link
-                  href="/login"
-                  className="rounded-full bg-slate-100 px-3 py-1 text-xs font-medium text-slate-700 hover:text-brand-600"
-                >
-                  登录
-                </Link>
+                <div className="flex items-center gap-2">
+                  <Link
+                    href="/login"
+                    className="rounded-full bg-slate-100 px-3 py-1 text-xs font-medium text-slate-700 hover:text-brand-600"
+                  >
+                    登录
+                  </Link>
+                  <Link
+                    href="/register"
+                    className="rounded-full bg-brand-600 px-3 py-1 text-xs font-medium text-white hover:bg-brand-700"
+                  >
+                    注册
+                  </Link>
+                </div>
              )}
            </div>
          </header>
+
          <main className="flex-1">{children}</main>
+
          <footer className="mt-10 flex items-center justify-between border-t border-slate-200 pt-6 text-xs text-slate-500">
-            <span>素材来自 img.020417.xyz</span>
-            <span>为朋友制作 · {new Date().getFullYear()}</span>
+            <span>Solo company feed 信息流</span>
+            <span>{new Date().getFullYear()}</span>
          </footer>
        </div>
      </body>
--- a/app/login/page.tsx
+++ b/app/login/page.tsx
@@ -7,15 +7,17 @@ export const metadata = {
 export default function LoginPage() {
  return (
    <div className="mx-auto max-w-md rounded-2xl bg-white/90 p-8 shadow-sm ring-1 ring-slate-100">
-      <h1 className="text-2xl font-semibold text-slate-900">管理员登录</h1>
-      <p className="mt-2 text-sm text-slate-600">使用已注册账号登录。</p>
+      <h1 className="text-2xl font-semibold text-slate-900">登录</h1>
+      <p className="mt-2 text-sm text-slate-600">
+        登录后可以发布内容、修改自己的内容，并查看个人统计。
+      </p>
      <div className="mt-6">
        <LoginForm />
      </div>
      <p className="mt-4 text-sm text-slate-500">
        还没有账号？{" "}
        <a href="/register" className="text-brand-600 hover:text-brand-700">
-          去注册
+          立即注册
        </a>
      </p>
    </div>
--- a/app/p/[slug]/page.tsx
+++ b/app/p/[slug]/page.tsx
@@ -1,11 +1,10 @@
-import { getDb } from "@/lib/mongo";
-import { MarkdownViewer } from "@/components/MarkdownViewer";
 import { notFound } from "next/navigation";
-import { normalizeImageUrl } from "@/lib/normalize";
-import { Post } from "@/types/post";
+import { MarkdownViewer } from "@/components/MarkdownViewer";
 import { SharePanel } from "@/components/SharePanel";
+import { getDb } from "@/lib/mongo";
+import { serializePost } from "@/lib/posts";
+import { normalizeImageUrl } from "@/lib/normalize";
 import { getSiteUrl } from "@/lib/site";
-import { DEFAULT_OPC_SIGNAL } from "@/lib/opc";

 export const dynamic = "force-dynamic";

@@ -13,33 +12,23 @@ type Props = {
  params: { slug: string };
 };

-async function fetchPost(slug: string): Promise<Post | null> {
+async function fetchPost(slug: string) {
  const db = await getDb();
  const doc = await db.collection("posts").findOne({ slug });
-  if (!doc) return null;
-  // fire-and-forget view increment
-  db.collection("posts").updateOne({ slug }, { $inc: { views: 1 } }).catch(() => {});
-  return {
-    _id: doc._id?.toString(),
-    title: doc.title ?? "",
-    slug: doc.slug ?? slug,
-    markdown: doc.markdown ?? "",
-    cover: doc.cover,
-    tags: doc.tags ?? [],
-    signal: doc.signal ?? DEFAULT_OPC_SIGNAL,
-    author: doc.author ?? "佚名",
-    createdAt: doc.createdAt ?? new Date().toISOString(),
-    updatedAt: doc.updatedAt ?? doc.createdAt ?? new Date().toISOString(),
-    views: doc.views ?? 0
-  };
+  if (!doc) {
+    return null;
+  }
+
+  db.collection("posts").updateOne({ _id: doc._id }, { $inc: { views: 1 } }).catch(() => {});
+  return serializePost({ ...doc, views: (doc.views ?? 0) + 1 });
 }

 export default async function PostPage({ params }: Props) {
  const post = await fetchPost(params.slug);
-
  if (!post) {
    notFound();
  }
+
  const coverUrl = normalizeImageUrl(post.cover);
  const shareUrl = `${getSiteUrl()}/p/${post.slug}`;

@@ -51,7 +40,11 @@ export default async function PostPage({ params }: Props) {
          <SharePanel url={shareUrl} />
        </div>
        <p className="mt-2 text-sm text-slate-500">
-          {post.author || "佚名"} · {new Date(post.createdAt).toLocaleString("zh-CN", { hour12: false })}
+          {post.author || "匿名"} |{" "}
+          {new Date(post.createdAt).toLocaleString("zh-CN", {
+            hour12: false,
+            timeZone: "Asia/Shanghai"
+          })}
        </p>
        {coverUrl ? (
          <img
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -1,7 +1,8 @@
-import { getDb } from "@/lib/mongo";
 import { PostCard } from "@/components/PostCard";
-import { Post } from "@/types/post";
+import { getDb } from "@/lib/mongo";
+import { serializePost } from "@/lib/posts";
 import { buildSearchFilter } from "@/lib/search";
+import { Post } from "@/types/post";

 export const dynamic = "force-dynamic";

@@ -14,13 +15,16 @@ async function fetchPosts(params: {
 }): Promise<{ posts: Post[]; total: number; page: number; totalPages: number }> {
  const db = await getDb();
  const filters: Record<string, unknown>[] = [];
+
  if (params.tag) {
    filters.push({ tags: params.tag });
  }
+
  const searchFilter = buildSearchFilter(params.q);
  if (searchFilter) {
    filters.push(searchFilter as Record<string, unknown>);
  }
+
  const filter = filters.length > 0 ? { $and: filters } : {};
  const total = await db.collection("posts").countDocuments(filter);
  const totalPages = Math.max(1, Math.ceil(total / PAGE_SIZE));
@@ -32,12 +36,9 @@ async function fetchPosts(params: {
    .skip((page - 1) * PAGE_SIZE)
    .limit(PAGE_SIZE)
    .toArray();
+
  return {
-    posts: docs.map((d: any) => ({
-      ...d,
-      author: d.author ?? "佚名",
-      _id: d._id?.toString()
-    })),
+    posts: docs.map((doc: any) => serializePost(doc)),
    total,
    page,
    totalPages
@@ -80,9 +81,9 @@ export default async function HomePage({
  return (
    <div className="space-y-6">
      <div className="rounded-2xl bg-gradient-to-r from-brand-500 to-brand-700 p-6 text-white shadow-lg">
-        <h1 className="text-2xl font-semibold">OPC 信息流</h1>
+        <h1 className="text-2xl font-semibold">OPC Feed</h1>
        <p className="mt-2 text-sm text-white/80">
-          用 Markdown 记录进展、发布动态，让一人公司也有自己的信息流平台。
+          未登录用户可以浏览全部内容；登录用户只能发布和修改自己的内容。
        </p>
        {tag ? (
          <div className="mt-3 inline-flex items-center gap-2 rounded-full bg-white/15 px-3 py-1 text-xs font-medium">
@@ -124,9 +125,7 @@ export default async function HomePage({
      </form>

      {posts.length === 0 ? (
-        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">
-          暂无内容，去后台发布吧。
-        </p>
+        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">暂无内容。</p>
      ) : (
        <div className="grid gap-4">
          {posts.map((post) => (
@@ -142,13 +141,21 @@ export default async function HomePage({
        <div className="flex items-center gap-2">
          <a
            href={buildHref(Math.max(1, currentPage - 1))}
-            className={`rounded-full px-3 py-1 ${currentPage <= 1 ? "pointer-events-none text-slate-300" : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"}`}
+            className={`rounded-full px-3 py-1 ${
+              currentPage <= 1
+                ? "pointer-events-none text-slate-300"
+                : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"
+            }`}
          >
            上一页
          </a>
          <a
            href={buildHref(Math.min(totalPages, currentPage + 1))}
-            className={`rounded-full px-3 py-1 ${currentPage >= totalPages ? "pointer-events-none text-slate-300" : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"}`}
+            className={`rounded-full px-3 py-1 ${
+              currentPage >= totalPages
+                ? "pointer-events-none text-slate-300"
+                : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"
+            }`}
          >
            下一页
          </a>
--- a/app/register/page.tsx
+++ b/app/register/page.tsx
@@ -7,8 +7,10 @@ export const metadata = {
 export default function RegisterPage() {
  return (
    <div className="mx-auto max-w-md rounded-2xl bg-white/90 p-8 shadow-sm ring-1 ring-slate-100">
-      <h1 className="text-2xl font-semibold text-slate-900">注册账号</h1>
-      <p className="mt-2 text-sm text-slate-600">注册后 24 小时内有效，过期需重新登录。</p>
+      <h1 className="text-2xl font-semibold text-slate-900">注册</h1>
+      <p className="mt-2 text-sm text-slate-600">
+        注册后可以发布和修改自己的内容，默认每个用户每天最多发布 10 条。
+      </p>
      <div className="mt-6">
        <RegisterForm />
      </div>
--- a/app/register/register-form.tsx
+++ b/app/register/register-form.tsx
@@ -58,7 +58,7 @@ export default function RegisterForm() {
          value={displayName}
          onChange={(e) => setDisplayName(e.target.value)}
          className="w-full rounded-xl border border-slate-200 bg-white px-3 py-2 text-sm shadow-inner focus:border-brand-500 focus:outline-none"
-          placeholder="不填则使用用户名"
+          placeholder="用于内容展示的名称"
        />
      </label>

--- a/app/rss/route.ts
+++ b/app/rss/route.ts
@@ -3,7 +3,7 @@ import { getSiteUrl } from "@/lib/site";

 export const dynamic = "force-dynamic";

-function escapeXml(input: string): string {
+function escapeXml(input: string) {
  return input
    .replace(/&/g, "&amp;")
    .replace(/</g, "&lt;")
@@ -12,12 +12,12 @@ function escapeXml(input: string): string {
    .replace(/'/g, "&apos;");
 }

-function stripMarkdown(input: string): string {
+function stripMarkdown(input: string) {
  return input
    .replace(/```[\s\S]*?```/g, " ")
    .replace(/`[^`]*`/g, " ")
    .replace(/!\[[^\]]*]\([^)]+\)/g, " ")
-    .replace(/\[[^\]]*]\([^)]+\)/g, "$1")
+    .replace(/\[([^\]]*)\]\([^)]+\)/g, "$1")
    .replace(/[#>*_~\-]+/g, " ")
    .replace(/\s+/g, " ")
    .trim();
@@ -42,7 +42,7 @@ export async function GET() {
      const pubDate = new Date(post.createdAt || post.updatedAt || Date.now()).toUTCString();
      return [
        "<item>",
-        `<title>${escapeXml(post.title || "Untitled")}</title>`,
+        `<title>${escapeXml(post.title || "未命名")}</title>`,
        `<link>${escapeXml(link)}</link>`,
        `<guid>${escapeXml(link)}</guid>`,
        `<pubDate>${pubDate}</pubDate>`,
@@ -55,9 +55,9 @@ export async function GET() {
  const xml = `<?xml version="1.0" encoding="UTF-8"?>
 <rss version="2.0">
 <channel>
-<title>不务正业的木子</title>
+<title>OPC Feed</title>
 <link>${escapeXml(siteUrl)}</link>
-<description>less is more</description>
+<description>Public feed</description>
 <lastBuildDate>${now}</lastBuildDate>
 ${items}
 </channel>
--- a/app/stats/page.tsx
+++ b/app/stats/page.tsx
@@ -0,0 +1,248 @@
+import { cookies } from "next/headers";
+import { cookieName, isAdminSession, verifySession } from "@/lib/auth";
+import { buildOwnedPostFilter } from "@/lib/posts";
+import { fetchAuthorBreakdown, fetchDailyStats, fetchStatsSummary, fetchTagStats } from "@/lib/stats";
+
+export const dynamic = "force-dynamic";
+
+const cardClass = "rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100";
+
+function formatTime(input?: string | null) {
+  if (!input) {
+    return "暂无数据";
+  }
+
+  return new Date(input).toLocaleString("zh-CN", {
+    hour12: false,
+    timeZone: "Asia/Shanghai"
+  });
+}
+
+function MetricCard({
+  label,
+  value
+}: {
+  label: string;
+  value: number | string;
+}) {
+  return (
+    <div className={cardClass}>
+      <p className="text-sm text-slate-500">{label}</p>
+      <p className="mt-2 text-3xl font-semibold text-slate-900">{value}</p>
+    </div>
+  );
+}
+
+function ProgressList({
+  items,
+  emptyText,
+  colorClass,
+  valueLabel
+}: {
+  items: Array<{ label: string; count: number }>;
+  emptyText: string;
+  colorClass: string;
+  valueLabel?: (count: number) => string;
+}) {
+  const maxValue = Math.max(...items.map((item) => item.count), 1);
+
+  if (items.length === 0) {
+    return <p className="text-sm text-slate-500">{emptyText}</p>;
+  }
+
+  return (
+    <div className="space-y-3">
+      {items.map((item) => (
+        <div key={item.label} className="space-y-1">
+          <div className="flex items-center justify-between text-xs text-slate-600">
+            <span>{item.label}</span>
+            <span>{valueLabel ? valueLabel(item.count) : item.count}</span>
+          </div>
+          <div className="h-2 rounded-full bg-slate-100">
+            <div
+              className={`h-2 rounded-full ${colorClass}`}
+              style={{ width: `${(item.count / maxValue) * 100}%` }}
+            />
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+}
+
+function TopPosts({
+  title,
+  items,
+  latestText
+}: {
+  title: string;
+  items: Array<{ title: string; slug: string; views: number }>;
+  latestText: string;
+}) {
+  return (
+    <div className={cardClass}>
+      <h3 className="text-base font-semibold text-slate-900">{title}</h3>
+      <div className="mt-3 space-y-3">
+        {items.length === 0 ? (
+          <p className="text-sm text-slate-500">暂无内容。</p>
+        ) : (
+          items.map((item) => (
+            <div key={item.slug} className="flex items-center justify-between gap-3 text-sm">
+              <a href={`/p/${item.slug}`} className="truncate text-slate-800 hover:text-brand-600">
+                {item.title}
+              </a>
+              <span className="shrink-0 text-slate-500">{item.views} 次浏览</span>
+            </div>
+          ))
+        )}
+      </div>
+      <p className="mt-4 text-xs text-slate-500">{latestText}</p>
+    </div>
+  );
+}
+
+export default async function StatsPage() {
+  const token = cookies().get(cookieName)?.value;
+  const session = await verifySession(token);
+  const personalFilter = buildOwnedPostFilter(session);
+  const adminView = isAdminSession(session);
+
+  const [mySummary, overallSummary, myTags, myDaily, authorBreakdown] = await Promise.all([
+    fetchStatsSummary(personalFilter),
+    fetchStatsSummary({}),
+    fetchTagStats(personalFilter, 8),
+    fetchDailyStats(personalFilter, 7),
+    adminView ? fetchAuthorBreakdown() : Promise.resolve([])
+  ]);
+
+  return (
+    <div className="space-y-6">
+      <section className="rounded-2xl bg-white/80 p-6 shadow-sm ring-1 ring-slate-100">
+        <div className="flex flex-wrap items-center justify-between gap-3">
+          <div>
+            <h1 className="text-2xl font-semibold text-slate-900">统计中心</h1>
+            <p className="mt-2 text-sm text-slate-500">
+              登录用户可以查看自己的发布统计和全站汇总，管理员还可以查看所有用户的统计结果。
+            </p>
+          </div>
+          <a
+            href="/admin"
+            className="rounded-full bg-brand-50 px-4 py-2 text-sm font-medium text-brand-700 ring-1 ring-brand-100 hover:bg-brand-100"
+          >
+            返回后台
+          </a>
+        </div>
+      </section>
+
+      <section className="space-y-4">
+        <div className="flex items-center justify-between">
+          <h2 className="text-lg font-semibold text-slate-900">我的统计</h2>
+          <span className="text-sm text-slate-500">{session?.name || "未知用户"}</span>
+        </div>
+
+        <div className="grid gap-4 sm:grid-cols-2 xl:grid-cols-4">
+          <MetricCard label="我的发布数" value={mySummary.total} />
+          <MetricCard label="我的总浏览" value={mySummary.totalViews} />
+          <MetricCard label="篇均浏览" value={mySummary.avgViews} />
+          <MetricCard label="我的标签数" value={mySummary.tagCount} />
+        </div>
+
+        <div className="grid gap-4 lg:grid-cols-2">
+          <TopPosts
+            title="热门内容"
+            items={mySummary.top}
+            latestText={
+              mySummary.latest
+                ? `最近发布：${mySummary.latest.title} · ${formatTime(mySummary.latest.createdAt)}`
+                : "最近发布：暂无数据"
+            }
+          />
+
+          <div className={cardClass}>
+            <h3 className="text-base font-semibold text-slate-900">常用标签</h3>
+            <div className="mt-3">
+              <ProgressList
+                items={myTags.map((item) => ({ label: `#${item.tag}`, count: item.count }))}
+                emptyText="暂无标签统计。"
+                colorClass="bg-brand-500/80"
+              />
+            </div>
+          </div>
+        </div>
+
+        <div className={cardClass}>
+          <h3 className="text-base font-semibold text-slate-900">最近 7 天</h3>
+          <div className="mt-3">
+            <ProgressList
+              items={myDaily.map((item) => ({ label: item.label, count: item.count }))}
+              emptyText="最近 7 天暂无发布记录。"
+              colorClass="bg-emerald-500/80"
+            />
+          </div>
+        </div>
+      </section>
+
+      <section className="space-y-4">
+        <h2 className="text-lg font-semibold text-slate-900">全站统计</h2>
+
+        <div className="grid gap-4 sm:grid-cols-2 xl:grid-cols-5">
+          <MetricCard label="总发布数" value={overallSummary.total} />
+          <MetricCard label="总浏览数" value={overallSummary.totalViews} />
+          <MetricCard label="篇均浏览" value={overallSummary.avgViews} />
+          <MetricCard label="标签总数" value={overallSummary.tagCount} />
+          <MetricCard label="作者数" value={overallSummary.authorCount} />
+        </div>
+
+        <TopPosts
+          title="全站热门内容"
+          items={overallSummary.top}
+          latestText={
+            overallSummary.latest
+              ? `最近发布：${overallSummary.latest.title} · ${formatTime(overallSummary.latest.createdAt)}`
+              : "最近发布：暂无数据"
+          }
+        />
+      </section>
+
+      {adminView ? (
+        <section className={cardClass}>
+          <div className="flex flex-wrap items-center justify-between gap-3">
+            <div>
+              <h2 className="text-lg font-semibold text-slate-900">全用户统计</h2>
+              <p className="mt-1 text-sm text-slate-500">管理员可以在这里查看每个用户的发布量和浏览汇总。</p>
+            </div>
+          </div>
+
+          {authorBreakdown.length === 0 ? (
+            <p className="mt-4 text-sm text-slate-500">暂无用户统计数据。</p>
+          ) : (
+            <div className="mt-4 overflow-x-auto">
+              <table className="min-w-full text-left text-sm">
+                <thead>
+                  <tr className="border-b border-slate-100 text-slate-500">
+                    <th className="pb-3 pr-4 font-medium">用户</th>
+                    <th className="pb-3 pr-4 font-medium">发布数</th>
+                    <th className="pb-3 pr-4 font-medium">浏览数</th>
+                    <th className="pb-3 pr-4 font-medium">篇均浏览</th>
+                    <th className="pb-3 font-medium">最近发布时间</th>
+                  </tr>
+                </thead>
+                <tbody>
+                  {authorBreakdown.map((item) => (
+                    <tr key={`${item.ownerId || "legacy"}-${item.author}`} className="border-b border-slate-50">
+                      <td className="py-3 pr-4 text-slate-800">{item.author}</td>
+                      <td className="py-3 pr-4 text-slate-600">{item.count}</td>
+                      <td className="py-3 pr-4 text-slate-600">{item.totalViews}</td>
+                      <td className="py-3 pr-4 text-slate-600">{item.avgViews}</td>
+                      <td className="py-3 text-slate-600">{formatTime(item.latestCreatedAt)}</td>
+                    </tr>
+                  ))}
+                </tbody>
+              </table>
+            </div>
+          )}
+        </section>
+      ) : null}
+    </div>
+  );
+}
--- a/app/tags/[tag]/page.tsx
+++ b/app/tags/[tag]/page.tsx
@@ -1,7 +1,8 @@
-import { getDb } from "@/lib/mongo";
 import { PostCard } from "@/components/PostCard";
-import { Post } from "@/types/post";
+import { getDb } from "@/lib/mongo";
+import { serializePost } from "@/lib/posts";
 import { buildSearchFilter } from "@/lib/search";
+import { Post } from "@/types/post";

 export const dynamic = "force-dynamic";

@@ -18,6 +19,7 @@ async function fetchTagPosts(params: {
  if (searchFilter) {
    filters.push(searchFilter as Record<string, unknown>);
  }
+
  const filter = { $and: filters };
  const total = await db.collection("posts").countDocuments(filter);
  const totalPages = Math.max(1, Math.ceil(total / PAGE_SIZE));
@@ -29,12 +31,9 @@ async function fetchTagPosts(params: {
    .skip((page - 1) * PAGE_SIZE)
    .limit(PAGE_SIZE)
    .toArray();
+
  return {
-    posts: docs.map((d: any) => ({
-      ...d,
-      author: d.author ?? "佚名",
-      _id: d._id?.toString()
-    })),
+    posts: docs.map((doc: any) => serializePost(doc)),
    total,
    page,
    totalPages
@@ -64,7 +63,7 @@ export default async function TagDetailPage({
  return (
    <div className="space-y-6">
      <div className="rounded-2xl bg-white/80 p-6 shadow-sm ring-1 ring-slate-100">
-        <h1 className="text-2xl font-semibold">标签 · {tag}</h1>
+        <h1 className="text-2xl font-semibold">标签 / {tag}</h1>
        <p className="mt-2 text-sm text-slate-500">共 {total} 条内容</p>
      </div>

@@ -76,7 +75,7 @@ export default async function TagDetailPage({
        <input
          name="q"
          defaultValue={q || ""}
-          placeholder="在当前标签内搜索"
+          placeholder="在当前标签下搜索"
          className="min-w-[200px] flex-1 rounded-xl border border-slate-200 bg-white px-3 py-2 text-sm shadow-inner focus:border-brand-500 focus:outline-none"
        />
        <button
@@ -96,9 +95,7 @@ export default async function TagDetailPage({
      </form>

      {posts.length === 0 ? (
-        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">
-          暂无内容。
-        </p>
+        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">暂无内容。</p>
      ) : (
        <div className="grid gap-4">
          {posts.map((post) => (
@@ -114,13 +111,21 @@ export default async function TagDetailPage({
        <div className="flex items-center gap-2">
          <a
            href={buildHref(Math.max(1, currentPage - 1))}
-            className={`rounded-full px-3 py-1 ${currentPage <= 1 ? "pointer-events-none text-slate-300" : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"}`}
+            className={`rounded-full px-3 py-1 ${
+              currentPage <= 1
+                ? "pointer-events-none text-slate-300"
+                : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"
+            }`}
          >
            上一页
          </a>
          <a
            href={buildHref(Math.min(totalPages, currentPage + 1))}
-            className={`rounded-full px-3 py-1 ${currentPage >= totalPages ? "pointer-events-none text-slate-300" : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"}`}
+            className={`rounded-full px-3 py-1 ${
+              currentPage >= totalPages
+                ? "pointer-events-none text-slate-300"
+                : "bg-white/80 ring-1 ring-slate-200 hover:text-brand-600"
+            }`}
          >
            下一页
          </a>
--- a/app/tags/page.tsx
+++ b/app/tags/page.tsx
@@ -19,13 +19,11 @@ export default async function TagsPage() {
    <div className="space-y-6">
      <div className="rounded-2xl bg-white/80 p-6 shadow-sm ring-1 ring-slate-100">
        <h1 className="text-2xl font-semibold">标签</h1>
-        <p className="mt-2 text-sm text-slate-500">按标签浏览信息流内容。</p>
+        <p className="mt-2 text-sm text-slate-500">所有访客都可以按标签浏览内容。</p>
      </div>

      {tags.length === 0 ? (
-        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">
-          暂无标签。
-        </p>
+        <p className="rounded-xl bg-white/70 p-4 text-sm text-slate-500 ring-1 ring-slate-100">暂无标签。</p>
      ) : (
        <div className="flex flex-wrap gap-3">
          {tags.map((tag) => (
--- a/components/AdminPostList.tsx
+++ b/components/AdminPostList.tsx
@@ -6,24 +6,32 @@ import { Post } from "@/types/post";

 type AdminPost = Post & { createdAtText?: string };

-export function AdminPostList({ initialPosts }: { initialPosts: AdminPost[] }) {
+export function AdminPostList({
+  initialPosts,
+  canDelete = false
+}: {
+  initialPosts: AdminPost[];
+  canDelete?: boolean;
+}) {
  const [posts, setPosts] = useState<AdminPost[]>(initialPosts);
  const [tagQuery, setTagQuery] = useState("");

  const visiblePosts = useMemo(() => {
-    const q = tagQuery.trim().toLowerCase();
-    if (!q) return posts;
-    return posts.filter((post) => post.tags?.some((tag) => tag.toLowerCase().includes(q)));
+    const query = tagQuery.trim().toLowerCase();
+    if (!query) return posts;
+    return posts.filter((post) => post.tags?.some((tag) => tag.toLowerCase().includes(query)));
  }, [posts, tagQuery]);

  async function handleDelete(slug: string) {
    if (!window.confirm("确定要删除这条内容吗？此操作不可恢复。")) return;
+
    const res = await fetch(`/api/posts/${slug}`, { method: "DELETE" });
    if (!res.ok) {
      const data = await res.json().catch(() => ({}));
      alert(data.error || "删除失败");
      return;
    }
+
    setPosts((prev) => prev.filter((post) => post.slug !== slug));
  }

@@ -35,7 +43,9 @@ export function AdminPostList({ initialPosts }: { initialPosts: AdminPost[] }) {
    );
  }

-  const summary = tagQuery ? `匹配 ${visiblePosts.length} / 总 ${posts.length}` : `共 ${posts.length} 条`;
+  const summary = tagQuery
+    ? `匹配 ${visiblePosts.length} / 共 ${posts.length} 条`
+    : `共 ${posts.length} 条`;

  return (
    <div className="space-y-3 rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100">
@@ -74,8 +84,8 @@ export function AdminPostList({ initialPosts }: { initialPosts: AdminPost[] }) {
                {post.title}
              </Link>
              <p className="text-xs text-slate-500">
-                {(post.author || "佚名") +
-                  " · " +
+                {(post.author || "匿名") +
+                  " | " +
                  (post.createdAtText ||
                    new Date(post.createdAt).toLocaleString("zh-CN", {
                      hour12: false,
@@ -99,13 +109,15 @@ export function AdminPostList({ initialPosts }: { initialPosts: AdminPost[] }) {
              >
                编辑
              </Link>
-              <button
-                type="button"
-                onClick={() => handleDelete(post.slug)}
-                className="rounded-full bg-red-50 px-3 py-1 text-xs font-medium text-red-600 ring-1 ring-red-100 hover:bg-red-100"
-              >
-                删除
-              </button>
+              {canDelete ? (
+                <button
+                  type="button"
+                  onClick={() => handleDelete(post.slug)}
+                  className="rounded-full bg-red-50 px-3 py-1 text-xs font-medium text-red-600 ring-1 ring-red-100 hover:bg-red-100"
+                >
+                  删除
+                </button>
+              ) : null}
            </div>
          </div>
        ))}
--- a/components/AdminUserManager.tsx
+++ b/components/AdminUserManager.tsx
@@ -0,0 +1,239 @@
+"use client";
+
+import { useMemo, useState } from "react";
+
+type ManagedPost = {
+  slug: string;
+  title: string;
+  createdAt: string;
+};
+
+type ManagedUser = {
+  id: string;
+  username: string;
+  displayName: string;
+  role: "admin" | "user";
+  dailyPostLimit: number;
+  postCount: number;
+  todayPostCount: number;
+  posts: ManagedPost[];
+};
+
+export function AdminUserManager({
+  initialUsers,
+  currentUserId
+}: {
+  initialUsers: ManagedUser[];
+  currentUserId: string;
+}) {
+  const [users, setUsers] = useState(initialUsers);
+  const [query, setQuery] = useState("");
+  const [savingId, setSavingId] = useState<string | null>(null);
+
+  const visibleUsers = useMemo(() => {
+    const keyword = query.trim().toLowerCase();
+    if (!keyword) return users;
+    return users.filter(
+      (user) =>
+        user.username.toLowerCase().includes(keyword) ||
+        user.displayName.toLowerCase().includes(keyword)
+    );
+  }, [query, users]);
+
+  async function handleDeletePost(slug: string) {
+    if (!window.confirm("确定要删除这条内容吗？")) return;
+
+    const res = await fetch(`/api/posts/${slug}`, { method: "DELETE" });
+    const data = await res.json().catch(() => ({}));
+    if (!res.ok) {
+      alert(data.error || "删除失败");
+      return;
+    }
+
+    setUsers((prev) =>
+      prev.map((user) => {
+        const target = user.posts.find((post) => post.slug === slug);
+        if (!target) return user;
+        return {
+          ...user,
+          postCount: Math.max(0, user.postCount - 1),
+          todayPostCount:
+            toShanghaiDateKey(target.createdAt) === toShanghaiDateKey(new Date().toISOString())
+              ? Math.max(0, user.todayPostCount - 1)
+              : user.todayPostCount,
+          posts: user.posts.filter((post) => post.slug !== slug)
+        };
+      })
+    );
+  }
+
+  async function handleSaveLimit(userId: string, dailyPostLimit: number) {
+    setSavingId(userId);
+    try {
+      const res = await fetch(`/api/admin/users/${userId}`, {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ dailyPostLimit })
+      });
+      const data = await res.json().catch(() => ({}));
+      if (!res.ok) {
+        alert(data.error || "保存失败");
+        return;
+      }
+
+      setUsers((prev) =>
+        prev.map((user) =>
+          user.id === userId ? { ...user, dailyPostLimit: data.dailyPostLimit ?? dailyPostLimit } : user
+        )
+      );
+    } finally {
+      setSavingId(null);
+    }
+  }
+
+  async function handleDeleteUser(userId: string) {
+    if (!window.confirm("确定要删除该用户及其全部内容吗？")) return;
+
+    const res = await fetch(`/api/admin/users/${userId}`, { method: "DELETE" });
+    const data = await res.json().catch(() => ({}));
+    if (!res.ok) {
+      alert(data.error || "删除失败");
+      return;
+    }
+
+    setUsers((prev) => prev.filter((user) => user.id !== userId));
+  }
+
+  return (
+    <section className="space-y-4 rounded-2xl bg-white/80 p-5 shadow-sm ring-1 ring-slate-100">
+      <div className="flex flex-wrap items-center justify-between gap-3">
+        <div>
+          <h3 className="text-lg font-semibold text-slate-900">用户管理</h3>
+          <p className="text-sm text-slate-500">按用户名搜索，删除指定内容、删除用户，并设置每日发布额度。</p>
+        </div>
+        <input
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          placeholder="搜索用户名"
+          className="w-44 rounded-full border border-slate-200 bg-white px-3 py-2 text-sm shadow-inner focus:border-brand-500 focus:outline-none"
+        />
+      </div>
+
+      <div className="space-y-4">
+        {visibleUsers.length === 0 ? (
+          <p className="text-sm text-slate-500">没有匹配的用户。</p>
+        ) : (
+          visibleUsers.map((user) => (
+            <AdminUserCard
+              key={user.id}
+              user={user}
+              currentUserId={currentUserId}
+              saving={savingId === user.id}
+              onDeletePost={handleDeletePost}
+              onDeleteUser={handleDeleteUser}
+              onSaveLimit={handleSaveLimit}
+            />
+          ))
+        )}
+      </div>
+    </section>
+  );
+}
+
+function toShanghaiDateKey(input: string) {
+  const date = new Date(input);
+  const shifted = new Date(date.getTime() + 8 * 60 * 60 * 1000);
+  return shifted.toISOString().slice(0, 10);
+}
+
+function AdminUserCard({
+  user,
+  currentUserId,
+  saving,
+  onDeletePost,
+  onDeleteUser,
+  onSaveLimit
+}: {
+  user: ManagedUser;
+  currentUserId: string;
+  saving: boolean;
+  onDeletePost: (slug: string) => Promise<void>;
+  onDeleteUser: (userId: string) => Promise<void>;
+  onSaveLimit: (userId: string, dailyPostLimit: number) => Promise<void>;
+}) {
+  const [limit, setLimit] = useState(user.dailyPostLimit);
+
+  return (
+    <div className="rounded-2xl border border-slate-100 bg-white/70 p-4">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div>
+          <h4 className="text-base font-semibold text-slate-900">
+            {user.displayName} <span className="text-sm font-normal text-slate-500">(@{user.username})</span>
+          </h4>
+          <p className="mt-1 text-sm text-slate-500">
+            角色：{user.role === "admin" ? "管理员" : "用户"} | 总发布：{user.postCount} | 今日发布：{user.todayPostCount}
+          </p>
+        </div>
+
+        <div className="flex flex-wrap items-center gap-2">
+          <input
+            type="number"
+            min={0}
+            value={limit}
+            onChange={(e) => setLimit(Number(e.target.value))}
+            className="w-24 rounded-full border border-slate-200 bg-white px-3 py-2 text-sm shadow-inner focus:border-brand-500 focus:outline-none"
+          />
+          <button
+            type="button"
+            disabled={saving}
+            onClick={() => onSaveLimit(user.id, limit)}
+            className="rounded-full bg-brand-50 px-3 py-2 text-xs font-medium text-brand-700 ring-1 ring-brand-100 hover:bg-brand-100 disabled:opacity-60"
+          >
+            保存额度
+          </button>
+          {user.id !== currentUserId ? (
+            <button
+              type="button"
+              onClick={() => onDeleteUser(user.id)}
+              className="rounded-full bg-red-50 px-3 py-2 text-xs font-medium text-red-600 ring-1 ring-red-100 hover:bg-red-100"
+            >
+              删除用户
+            </button>
+          ) : null}
+        </div>
+      </div>
+
+      <div className="mt-4 space-y-2">
+        {user.posts.length === 0 ? (
+          <p className="text-sm text-slate-500">该用户暂无内容。</p>
+        ) : (
+          user.posts.map((post) => (
+            <div
+              key={post.slug}
+              className="flex flex-wrap items-center justify-between gap-3 rounded-xl border border-slate-100 bg-white px-3 py-2"
+            >
+              <div>
+                <a href={`/p/${post.slug}`} className="text-sm font-medium text-slate-900 hover:text-brand-600">
+                  {post.title}
+                </a>
+                <p className="text-xs text-slate-500">
+                  {new Date(post.createdAt).toLocaleString("zh-CN", {
+                    hour12: false,
+                    timeZone: "Asia/Shanghai"
+                  })}
+                </p>
+              </div>
+              <button
+                type="button"
+                onClick={() => onDeletePost(post.slug)}
+                className="rounded-full bg-red-50 px-3 py-1 text-xs font-medium text-red-600 ring-1 ring-red-100 hover:bg-red-100"
+              >
+                删除内容
+              </button>
+            </div>
+          ))
+        )}
+      </div>
+    </div>
+  );
+}
--- a/components/CreatePostForm.tsx
+++ b/components/CreatePostForm.tsx
@@ -2,19 +2,26 @@

 import { FormEvent, useState } from "react";
 import { useRouter } from "next/navigation";
-import { normalizeImageUrl } from "@/lib/normalize";
 import { MarkdownPreview } from "@/components/MarkdownPreview";
+import { normalizeImageUrl } from "@/lib/normalize";

-const defaultIntro = `## solo-feed 记录模板
+const defaultIntro = `## 今日进展

 - 今日目标：
- 产品/交付：
- 客户/收入：
- 增长/运营：
- 学习/复盘：
-`;
+- 产品 / 交付：
+- 客户 / 收入：
+- 增长 / 运营：
+- 学习 / 复盘：`;

-export function CreatePostForm({ availableTags = [] }: { availableTags?: string[] }) {
+export function CreatePostForm({
+  availableTags = [],
+  publishLimit = 10,
+  todayCount = 0
+}: {
+  availableTags?: string[];
+  publishLimit?: number;
+  todayCount?: number;
+}) {
  const [title, setTitle] = useState("");
  const [cover, setCover] = useState("");
  const [tags, setTags] = useState("");
@@ -27,7 +34,7 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
    const current = new Set(
      tags
        .split(",")
-        .map((t) => t.trim())
+        .map((item) => item.trim())
        .filter(Boolean)
    );
    current.add(tag);
@@ -50,7 +57,7 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
            new Set(
              tags
                .split(",")
-                .map((t) => t.trim())
+                .map((item) => item.trim())
                .filter(Boolean)
            )
          )
@@ -60,11 +67,12 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
      if (!res.ok) {
        const data = await res.json().catch(() => ({}));
        alert(data.error ? JSON.stringify(data.error) : "发布失败");
-      } else {
-        const data = await res.json();
-        router.push(`/p/${data.slug}`);
-        router.refresh();
+        return;
      }
+
+      const data = await res.json();
+      router.push(`/p/${data.slug}`);
+      router.refresh();
    } finally {
      setLoading(false);
    }
@@ -74,25 +82,12 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
    <form onSubmit={handleSubmit} className="space-y-4 rounded-2xl bg-white/80 p-5 shadow-sm ring-1 ring-slate-100">
      <div className="flex flex-wrap items-center justify-between gap-3">
        <div>
-          <h3 className="text-lg font-semibold">发布新内容</h3>
-          <p className="text-sm text-slate-500">以信息流的方式记录进展、沉淀经验。</p>
-        </div>
-        <div className="flex items-center gap-2">
-          <button
-            type="button"
-            onClick={() => setPreview((prev) => !prev)}
-            className="rounded-full bg-slate-100 px-4 py-2 text-sm font-medium text-slate-700 ring-1 ring-slate-200 hover:text-brand-600"
-          >
-            {preview ? "编辑" : "预览"}
-          </button>
-          <button
-            type="submit"
-            disabled={loading}
-            className="rounded-full bg-brand-600 px-4 py-2 text-sm font-medium text-white shadow hover:bg-brand-700 disabled:cursor-not-allowed disabled:opacity-60"
-          >
-            {loading ? "发布中..." : "发布"}
-          </button>
+          <h3 className="text-lg font-semibold">发布内容</h3>
+          <p className="text-sm text-slate-500">用信息流的形式记录今天的进展。</p>
        </div>
+        <span className="rounded-full bg-slate-100 px-3 py-1 text-xs text-slate-600 ring-1 ring-slate-200">
+          今日已发 {todayCount} / {publishLimit}
+        </span>
      </div>

      <label className="block space-y-1">
@@ -102,12 +97,12 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
          value={title}
          onChange={(e) => setTitle(e.target.value)}
          className="w-full rounded-xl border border-slate-200 bg-white px-3 py-2 text-sm shadow-inner focus:border-brand-500 focus:outline-none"
-          placeholder="例如：本周交付进展"
+          placeholder="例如：本周交付进度"
        />
      </label>

      <label className="block space-y-1">
-        <span className="text-sm font-medium text-slate-700">封面图片 URL（可选）</span>
+        <span className="text-sm font-medium text-slate-700">封面地址（可选）</span>
        <input
          value={cover}
          onChange={(e) => setCover(e.target.value)}
@@ -141,7 +136,26 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
      </label>

      <div className="space-y-1">
-        <span className="text-sm font-medium text-slate-700">Markdown 内容</span>
+        <div className="flex flex-wrap items-center justify-between gap-2">
+          <span className="text-sm font-medium text-slate-700">正文</span>
+          <div className="flex items-center gap-2">
+            <button
+              type="button"
+              onClick={() => setPreview((prev) => !prev)}
+              className="rounded-full bg-slate-100 px-4 py-2 text-sm font-medium text-slate-700 ring-1 ring-slate-200 hover:text-brand-600"
+            >
+              {preview ? "继续编辑" : "预览"}
+            </button>
+            <button
+              type="submit"
+              disabled={loading}
+              className="rounded-full bg-brand-600 px-4 py-2 text-sm font-medium text-white shadow hover:bg-brand-700 disabled:cursor-not-allowed disabled:opacity-60"
+            >
+              {loading ? "发布中..." : "发布"}
+            </button>
+          </div>
+        </div>
+
        {!preview ? (
          <textarea
            required
@@ -152,7 +166,7 @@ export function CreatePostForm({ availableTags = [] }: { availableTags?: string[
          />
        ) : (
          <div className="rounded-xl border border-slate-200 bg-white p-4">
-            <MarkdownPreview markdown={markdown || "(暂无内容)"} />
+            <MarkdownPreview markdown={markdown || "（空内容）"} />
          </div>
        )}
      </div>
--- a/components/EditPostForm.tsx
+++ b/components/EditPostForm.tsx
@@ -2,9 +2,9 @@

 import { useRouter } from "next/navigation";
 import { useState } from "react";
+import { MarkdownPreview } from "@/components/MarkdownPreview";
 import { normalizeImageUrl } from "@/lib/normalize";
 import { Post } from "@/types/post";
-import { MarkdownPreview } from "@/components/MarkdownPreview";

 export function EditPostForm({ post }: { post: Post }) {
  const router = useRouter();
@@ -31,7 +31,7 @@ export function EditPostForm({ post }: { post: Post }) {
            new Set(
              tags
                .split(",")
-                .map((t) => t.trim())
+                .map((item) => item.trim())
                .filter(Boolean)
            )
          )
@@ -49,41 +49,11 @@ export function EditPostForm({ post }: { post: Post }) {
    }
  }

-  async function handleDelete() {
-    if (!window.confirm("确定要删除这条内容吗？此操作不可恢复。")) return;
-    const res = await fetch(`/api/posts/${post.slug}`, { method: "DELETE" });
-    if (!res.ok) {
-      const data = await res.json().catch(() => ({}));
-      alert(data.error || "删除失败");
-      return;
-    }
-    router.push("/admin");
-    router.refresh();
-  }
-
  return (
    <form onSubmit={handleSave} className="space-y-4 rounded-2xl bg-white/80 p-5 shadow-sm ring-1 ring-slate-100">
-      <div className="flex flex-wrap items-center justify-between gap-3">
-        <div>
-          <h3 className="text-lg font-semibold">编辑内容</h3>
-          <p className="text-sm text-slate-500">更新信息流内容与标签。</p>
-        </div>
-        <div className="flex items-center gap-2">
-          <button
-            type="button"
-            onClick={handleDelete}
-            className="rounded-full bg-red-50 px-4 py-2 text-sm font-medium text-red-600 ring-1 ring-red-100 hover:bg-red-100"
-          >
-            删除
-          </button>
-          <button
-            type="submit"
-            disabled={loading}
-            className="rounded-full bg-brand-600 px-4 py-2 text-sm font-medium text-white shadow hover:bg-brand-700 disabled:cursor-not-allowed disabled:opacity-60"
-          >
-            {loading ? "保存中..." : "保存"}
-          </button>
-        </div>
+      <div className="space-y-1">
+        <h3 className="text-lg font-semibold">编辑内容</h3>
+        <p className="text-sm text-slate-500">你只能修改自己发布的内容。</p>
      </div>

      <label className="block space-y-1">
@@ -97,7 +67,7 @@ export function EditPostForm({ post }: { post: Post }) {
      </label>

      <label className="block space-y-1">
-        <span className="text-sm font-medium text-slate-700">封面图片 URL（可选）</span>
+        <span className="text-sm font-medium text-slate-700">封面地址（可选）</span>
        <input
          value={cover}
          onChange={(e) => setCover(e.target.value)}
@@ -117,15 +87,24 @@ export function EditPostForm({ post }: { post: Post }) {
      </label>

      <div className="space-y-1">
-        <div className="flex items-center justify-between">
-          <span className="text-sm font-medium text-slate-700">Markdown 内容</span>
-          <button
-            type="button"
-            onClick={() => setPreview((prev) => !prev)}
-            className="rounded-full bg-slate-100 px-3 py-1 text-xs font-medium text-slate-700 ring-1 ring-slate-200 hover:text-brand-600"
-          >
-            {preview ? "编辑" : "预览"}
-          </button>
+        <div className="flex flex-wrap items-center justify-between gap-2">
+          <span className="text-sm font-medium text-slate-700">正文</span>
+          <div className="flex items-center gap-2">
+            <button
+              type="button"
+              onClick={() => setPreview((prev) => !prev)}
+              className="rounded-full bg-slate-100 px-3 py-1 text-xs font-medium text-slate-700 ring-1 ring-slate-200 hover:text-brand-600"
+            >
+              {preview ? "继续编辑" : "预览"}
+            </button>
+            <button
+              type="submit"
+              disabled={loading}
+              className="rounded-full bg-brand-600 px-4 py-2 text-sm font-medium text-white shadow hover:bg-brand-700 disabled:cursor-not-allowed disabled:opacity-60"
+            >
+              {loading ? "保存中..." : "保存"}
+            </button>
+          </div>
        </div>
        {!preview ? (
          <textarea
@@ -137,7 +116,7 @@ export function EditPostForm({ post }: { post: Post }) {
          />
        ) : (
          <div className="rounded-xl border border-slate-200 bg-white p-4">
-            <MarkdownPreview markdown={markdown || "(暂无内容)"} />
+            <MarkdownPreview markdown={markdown || "（空内容）"} />
          </div>
        )}
      </div>
--- a/components/PostCard.tsx
+++ b/components/PostCard.tsx
@@ -8,7 +8,8 @@ type Props = {

 export function PostCard({ post }: Props) {
  const coverUrl = normalizeImageUrl(post.cover);
-  const author = post.author || "佚名";
+  const author = post.author || "匿名";
+
  return (
    <article className="group rounded-2xl bg-white/80 p-4 shadow-sm ring-1 ring-slate-100 transition-[transform,box-shadow] duration-300 will-change-transform transform-gpu hover:shadow-lg hover:[transform:perspective(900px)_translateY(-4px)_rotateX(2deg)_rotateY(-2deg)]">
      <div className="flex items-start justify-between gap-3">
@@ -20,7 +21,11 @@ export function PostCard({ post }: Props) {
            {post.title}
          </Link>
          <p className="text-sm text-slate-500">
-            {author} · {new Date(post.createdAt).toLocaleString("zh-CN", { hour12: false })}
+            {author} |{" "}
+            {new Date(post.createdAt).toLocaleString("zh-CN", {
+              hour12: false,
+              timeZone: "Asia/Shanghai"
+            })}
          </p>
        </div>
        {coverUrl ? (
--- a/lib/auth.ts
+++ b/lib/auth.ts
@@ -15,17 +15,28 @@ function getSecret() {
 }

 export type SessionPayload = {
-  role: "admin";
+  role: "admin" | "user";
  iat: number;
  exp?: number;
  uid?: string;
  name?: string;
+  username?: string;
 };

 export function getAdminName() {
  return process.env.ADMIN_NAME?.trim() || "Admin";
 }

+export function isAdminName(name?: string | null) {
+  const adminName = getAdminName().trim().toLowerCase();
+  const value = name?.trim().toLowerCase();
+  return Boolean(adminName && value && adminName === value);
+}
+
+export function isAdminSession(session?: SessionPayload | null) {
+  return session?.role === "admin";
+}
+
 async function getHmacKey(secret: string) {
  if (cachedKey && cachedSecret === secret) {
    return cachedKey;
@@ -63,6 +74,9 @@ export async function verifySession(token?: string): Promise<SessionPayload | nu
  if (check !== sig) return null;
  try {
    const payload = JSON.parse(Buffer.from(base, "base64url").toString());
+    if (payload?.role !== "admin" && payload?.role !== "user") {
+      return null;
+    }
    if (typeof payload?.exp !== "number") {
      return null;
    }
@@ -77,7 +91,8 @@ export async function verifySession(token?: string): Promise<SessionPayload | nu

 export async function requireAdminFromRequest(req: NextRequest): Promise<boolean> {
  const token = req.cookies.get(COOKIE_NAME)?.value;
-  return Boolean(await verifySession(token));
+  const session = await verifySession(token);
+  return isAdminSession(session);
 }

 export function setAdminCookie(token: string) {
--- a/lib/posts.ts
+++ b/lib/posts.ts
@@ -0,0 +1,96 @@
+import { SessionPayload, isAdminSession } from "@/lib/auth";
+import { DEFAULT_OPC_SIGNAL } from "@/lib/opc";
+import { Post } from "@/types/post";
+
+function buildLegacyAuthorFilter(session: SessionPayload) {
+  if (!session.name) {
+    return null;
+  }
+
+  return {
+    $and: [
+      {
+        $or: [{ ownerId: { $exists: false } }, { ownerId: null }]
+      },
+      { author: session.name }
+    ]
+  };
+}
+
+export function buildOwnedPostFilter(session?: SessionPayload | null) {
+  if (!session?.uid) {
+    return { _id: { $exists: false } };
+  }
+
+  const filters: Record<string, unknown>[] = [{ ownerId: session.uid }];
+  const legacyAuthorFilter = buildLegacyAuthorFilter(session);
+  if (legacyAuthorFilter) {
+    filters.push(legacyAuthorFilter);
+  }
+
+  return { $or: filters };
+}
+
+export function buildPostScopeFilter(session?: SessionPayload | null) {
+  return buildOwnedPostFilter(session);
+}
+
+export function isPostOwner(doc: any, session?: SessionPayload | null) {
+  if (!session?.uid) {
+    return false;
+  }
+
+  if (doc?.ownerId === session.uid) {
+    return true;
+  }
+
+  return !doc?.ownerId && Boolean(session.name) && doc?.author === session.name;
+}
+
+export function buildScopedPostFilter(
+  session: SessionPayload | null | undefined,
+  filters: Record<string, unknown>[] = []
+) {
+  const scopedFilters = [buildPostScopeFilter(session), ...filters].filter(
+    (item) => Object.keys(item).length > 0
+  );
+
+  if (scopedFilters.length === 0) {
+    return {};
+  }
+
+  if (scopedFilters.length === 1) {
+    return scopedFilters[0];
+  }
+
+  return { $and: scopedFilters };
+}
+
+export function canAccessPost() {
+  return true;
+}
+
+export function canEditPost(doc: any, session?: SessionPayload | null) {
+  return isPostOwner(doc, session);
+}
+
+export function canDeletePost(doc: any, session?: SessionPayload | null) {
+  return Boolean(doc && isAdminSession(session));
+}
+
+export function serializePost(doc: any): Post {
+  return {
+    _id: doc._id?.toString(),
+    title: doc.title ?? "",
+    slug: doc.slug ?? "",
+    markdown: doc.markdown ?? "",
+    cover: doc.cover,
+    tags: doc.tags ?? [],
+    signal: doc.signal ?? DEFAULT_OPC_SIGNAL,
+    author: doc.author ?? "匿名",
+    ownerId: doc.ownerId,
+    createdAt: doc.createdAt ?? new Date().toISOString(),
+    updatedAt: doc.updatedAt ?? doc.createdAt ?? new Date().toISOString(),
+    views: doc.views ?? 0
+  };
+}
--- a/lib/stats.ts
+++ b/lib/stats.ts
@@ -0,0 +1,212 @@
+import { getDb } from "@/lib/mongo";
+
+const SHANGHAI_OFFSET_MS = 8 * 60 * 60 * 1000;
+
+export type StatsSummary = {
+  total: number;
+  totalViews: number;
+  avgViews: number;
+  tagCount: number;
+  authorCount: number;
+  latest: { title: string; createdAt: string } | null;
+  top: Array<{ title: string; slug: string; views: number }>;
+};
+
+function appendMatch(
+  pipeline: Record<string, unknown>[],
+  filter: Record<string, unknown>,
+  extraMatch?: Record<string, unknown>
+) {
+  const matchFilters = [filter, extraMatch].filter(
+    (item) => item && Object.keys(item).length > 0
+  ) as Record<string, unknown>[];
+
+  if (matchFilters.length === 1) {
+    pipeline.push({ $match: matchFilters[0] });
+  } else if (matchFilters.length > 1) {
+    pipeline.push({ $match: { $and: matchFilters } });
+  }
+}
+
+function toShanghaiDateKey(date: Date) {
+  return new Date(date.getTime() + SHANGHAI_OFFSET_MS).toISOString().slice(0, 10);
+}
+
+function buildShanghaiBucketLabel(key: string) {
+  const [, month, day] = key.split("-").map(Number);
+  return `${month}/${day}`;
+}
+
+export async function fetchStatsSummary(filter: Record<string, unknown>): Promise<StatsSummary> {
+  const db = await getDb();
+  const collection = db.collection("posts");
+  const total = await collection.countDocuments(filter);
+  const latest = await collection
+    .find(filter, { projection: { title: 1, createdAt: 1 } })
+    .sort({ createdAt: -1 })
+    .limit(1)
+    .toArray();
+  const top = await collection
+    .find(filter, { projection: { title: 1, views: 1, slug: 1 } })
+    .sort({ views: -1, createdAt: -1 })
+    .limit(3)
+    .toArray();
+
+  const viewsPipeline: Record<string, unknown>[] = [];
+  appendMatch(viewsPipeline, filter);
+  viewsPipeline.push({
+    $group: {
+      _id: null,
+      totalViews: { $sum: { $ifNull: ["$views", 0] } }
+    }
+  });
+  const viewsAgg = await collection.aggregate(viewsPipeline).toArray();
+  const totalViews = viewsAgg[0]?.totalViews ?? 0;
+  const avgViews = total > 0 ? Math.round(totalViews / total) : 0;
+
+  const tagPipeline: Record<string, unknown>[] = [];
+  appendMatch(tagPipeline, filter, {
+    tags: { $exists: true, $ne: [] }
+  });
+  tagPipeline.push(
+    { $unwind: "$tags" },
+    { $group: { _id: "$tags" } },
+    { $count: "count" }
+  );
+  const tagCount = (await collection.aggregate(tagPipeline).toArray())[0]?.count ?? 0;
+
+  const authorPipeline: Record<string, unknown>[] = [];
+  appendMatch(authorPipeline, filter);
+  authorPipeline.push(
+    {
+      $group: {
+        _id: { $ifNull: ["$author", "匿名"] }
+      }
+    },
+    { $count: "count" }
+  );
+  const authorCount = (await collection.aggregate(authorPipeline).toArray())[0]?.count ?? 0;
+
+  return {
+    total,
+    totalViews,
+    avgViews,
+    tagCount,
+    authorCount,
+    latest: latest[0]
+      ? {
+          title: latest[0].title ?? "未命名",
+          createdAt: latest[0].createdAt ?? new Date().toISOString()
+        }
+      : null,
+    top: top.map((item: any) => ({
+      title: item.title ?? "未命名",
+      slug: item.slug ?? "",
+      views: item.views ?? 0
+    }))
+  };
+}
+
+export async function fetchTagStats(filter: Record<string, unknown>, limit = 10) {
+  const db = await getDb();
+  const pipeline: Record<string, unknown>[] = [];
+  appendMatch(pipeline, filter, {
+    tags: { $exists: true, $ne: [] }
+  });
+  pipeline.push(
+    { $unwind: "$tags" },
+    { $group: { _id: "$tags", count: { $sum: 1 } } },
+    { $sort: { count: -1, _id: 1 } },
+    { $limit: limit }
+  );
+
+  const result = await db.collection("posts").aggregate(pipeline).toArray();
+  return result.map((item: any) => ({
+    tag: item._id,
+    count: item.count
+  }));
+}
+
+export async function fetchDailyStats(filter: Record<string, unknown>, days = 7) {
+  const db = await getDb();
+  const now = new Date();
+  const dailyBuckets: { key: string; label: string }[] = [];
+
+  for (let index = days - 1; index >= 0; index -= 1) {
+    const current = new Date(now);
+    current.setUTCDate(current.getUTCDate() - index);
+    const key = toShanghaiDateKey(current);
+    dailyBuckets.push({
+      key,
+      label: buildShanghaiBucketLabel(key)
+    });
+  }
+
+  const firstKey = dailyBuckets[0]?.key;
+  const pipeline: Record<string, unknown>[] = [];
+  appendMatch(
+    pipeline,
+    filter,
+    firstKey
+      ? {
+          createdAt: {
+            $gte: new Date(`${firstKey}T00:00:00+08:00`).toISOString()
+          }
+        }
+      : undefined
+  );
+  pipeline.push(
+    {
+      $addFields: {
+        shanghaiDay: {
+          $dateToString: {
+            format: "%Y-%m-%d",
+            date: { $toDate: "$createdAt" },
+            timezone: "Asia/Shanghai"
+          }
+        }
+      }
+    },
+    { $group: { _id: "$shanghaiDay", count: { $sum: 1 } } }
+  );
+
+  const raw = await db.collection("posts").aggregate(pipeline).toArray();
+  const countMap = new Map<string, number>();
+  raw.forEach((item: any) => countMap.set(item._id, item.count));
+
+  return dailyBuckets.map((item) => ({
+    label: item.label,
+    count: countMap.get(item.key) ?? 0
+  }));
+}
+
+export async function fetchAuthorBreakdown(limit = 100) {
+  const db = await getDb();
+  const result = await db
+    .collection("posts")
+    .aggregate([
+      {
+        $group: {
+          _id: {
+            ownerId: { $ifNull: ["$ownerId", "legacy"] },
+            author: { $ifNull: ["$author", "匿名"] }
+          },
+          count: { $sum: 1 },
+          totalViews: { $sum: { $ifNull: ["$views", 0] } },
+          latestCreatedAt: { $max: "$createdAt" }
+        }
+      },
+      { $sort: { count: -1, totalViews: -1, "_id.author": 1 } },
+      { $limit: limit }
+    ])
+    .toArray();
+
+  return result.map((item: any) => ({
+    ownerId: item._id.ownerId === "legacy" ? undefined : item._id.ownerId,
+    author: item._id.author,
+    count: item.count,
+    totalViews: item.totalViews,
+    avgViews: item.count > 0 ? Math.round(item.totalViews / item.count) : 0,
+    latestCreatedAt: item.latestCreatedAt ?? null
+  }));
+}
--- a/lib/users.ts
+++ b/lib/users.ts
@@ -0,0 +1,38 @@
+import { ObjectId } from "mongodb";
+import { getDb } from "@/lib/mongo";
+
+export const DEFAULT_DAILY_POST_LIMIT = 10;
+const SHANGHAI_OFFSET_HOURS = 8;
+
+export function getEffectiveDailyPostLimit(user?: { dailyPostLimit?: number | null }) {
+  if (typeof user?.dailyPostLimit === "number" && user.dailyPostLimit >= 0) {
+    return user.dailyPostLimit;
+  }
+
+  return DEFAULT_DAILY_POST_LIMIT;
+}
+
+export function getShanghaiDayRange(now = new Date()) {
+  const shifted = new Date(now.getTime() + SHANGHAI_OFFSET_HOURS * 60 * 60 * 1000);
+  const year = shifted.getUTCFullYear();
+  const month = shifted.getUTCMonth();
+  const day = shifted.getUTCDate();
+  const start = new Date(Date.UTC(year, month, day, -SHANGHAI_OFFSET_HOURS, 0, 0, 0));
+  const end = new Date(Date.UTC(year, month, day + 1, -SHANGHAI_OFFSET_HOURS, 0, 0, 0));
+
+  return {
+    start,
+    end,
+    startIso: start.toISOString(),
+    endIso: end.toISOString()
+  };
+}
+
+export async function findUserById(uid?: string | null) {
+  if (!uid || !ObjectId.isValid(uid)) {
+    return null;
+  }
+
+  const db = await getDb();
+  return db.collection("users").findOne({ _id: new ObjectId(uid) });
+}
--- a/middleware.ts
+++ b/middleware.ts
@@ -7,6 +7,7 @@ export async function middleware(req: NextRequest) {

  const isProtected =
    pathname.startsWith("/admin") ||
+    pathname.startsWith("/stats") ||
    pathname.startsWith("/api/admin") ||
    pathname.startsWith("/api/posts") && req.method !== "GET";

@@ -30,5 +31,5 @@ export async function middleware(req: NextRequest) {
 }

 export const config = {
-  matcher: ["/admin/:path*", "/api/admin/:path*", "/api/posts/:path*"]
+  matcher: ["/admin/:path*", "/stats/:path*", "/api/admin/:path*", "/api/posts/:path*"]
 };
--- a/types/post.ts
+++ b/types/post.ts
@@ -7,6 +7,7 @@ export type Post = {
  tags?: string[];
  signal?: string;
  author: string;
+  ownerId?: string;
  createdAt: string;
  updatedAt: string;
  views?: number;