diff --git a/README.md b/README.md
index dde5f0e..5ac7d28 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@ cargo run -- --root ./sites --host 0.0.0.0 --port 3000
 
 - 登录是**页内弹窗**：点右上角用户图标；首次使用弹窗里是「设置密码 + 确认」（至少 8 位）；
 - 登录后点「站点设置」进入 `/admin`，可编辑页头滚动信息（启用 / 速度 / 条目）与侧栏顺序、显隐；
+- 详情页的 `[编辑]` 打开右侧 Drawer，可改标题 / 简介 / 标签 / 正文等（保存后局部刷新，`updated_at` 乐观锁）；
+- `/admin` 的「系统」页可以改密码、下载整库备份（`VACUUM INTO` 快照）；
 - 密码用 argon2id 哈希存在 `data/stash.db` 的 `admin` 表，会话是 HttpOnly + SameSite=Strict 的 Cookie（7 天）；
 - 读接口公开（本地工具可只读使用），写接口（设置、改密等）要求登录；
 - 忘记密码：删除 `admin` 表里的那一行（或整个库）后重启，会回到「设置密码」；
diff --git a/docs/ADMIN-PLAN.md b/docs/ADMIN-PLAN.md
index 0d52f22..192285b 100644
--- a/docs/ADMIN-PLAN.md
+++ b/docs/ADMIN-PLAN.md
@@ -167,4 +167,22 @@ DELETE /api/items/:id
 - 首页应用设置：滚动条目的文本/标签/速度/启用，侧栏按顺序与显隐渲染；
 - 测试：42 passed（新增 settings 5 例：默认值、版本递增、冲突、校验、坏 JSON 回落）。
 
+### P2（已完成，2026-10-29）
+
+- 库新增 `Textarea`（stash-ui v0.2.0）：`rows` / `resize` / `invalid`；
+- 条目编辑：`GET /api/items/{key}`（公开读）、`PATCH /api/items/{key}`（需登录）；
+- 乐观锁：`entry.updated_at`（迁移 v17），冲突返回 409；
+- 可编辑字段：标题、简介、标签、一句话评价、正文 Markdown、封面、跳转地址；
+- 前端：详情页 `[编辑]` → `Drawer` 表单；保存后 `catalog.reload()` 局部刷新，不整页刷新；
+- 审计：每次条目更新写入 `audit` 表；
+- 测试：46 passed（新增 entries 4 例：更新/标签替换、冲突、空标题、不存在）。
+
+### P3（部分完成，2026-10-29）
+
+- 审计表 `audit`：记录 `item.update`、`settings.update`；
+- 备份：`GET /api/backup`（需登录）用 `VACUUM INTO` 生成一致性副本并以附件下载；
+- 系统设置 Tab：修改密码（成功后所有会话失效）、下载备份；
+- **未做**：恢复/导入（需要停机替换文件或在线校验导入流程）、回收站/软删除、图片上传、拖拽排序（当前用上移/下移按钮替代）。
+
+
 
diff --git a/src/db/entries.rs b/src/db/entries.rs
new file mode 100644
index 0000000..9ace88b
--- /dev/null
+++ b/src/db/entries.rs
@@ -0,0 +1,307 @@
+//! 条目的读取与编辑（P2）。
+//!
+//! 编辑用 `updated_at` 做乐观锁：带上打开表单时的时间戳，
+//! 别人已经改过就返回冲突，而不是静默覆盖。
+
+use rusqlite::{Connection, OptionalExtension, params};
+use serde::{Deserialize, Serialize};
+
+use crate::{db::map_error, error::StashError};
+
+const MAX_NAME: usize = 120;
+const MAX_BODY: usize = 100_000;
+const MAX_TAGS: usize = 30;
+const MAX_TAG_LEN: usize = 40;
+
+#[derive(Debug, Clone, Serialize, PartialEq, Eq)]
+pub struct EntryRecord {
+    pub key: String,
+    pub name: String,
+    pub description: String,
+    pub icon: String,
+    pub href: String,
+    pub cover: String,
+    pub banner: String,
+    pub badge: String,
+    pub comment: String,
+    pub summary: String,
+    pub body: String,
+    pub tags: Vec<String>,
+    pub updated_at: i64,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct EntryPatch {
+    pub name: String,
+    #[serde(default)]
+    pub description: String,
+    #[serde(default)]
+    pub icon: String,
+    #[serde(default)]
+    pub href: String,
+    #[serde(default)]
+    pub cover: String,
+    #[serde(default)]
+    pub banner: String,
+    #[serde(default)]
+    pub badge: String,
+    #[serde(default)]
+    pub comment: String,
+    #[serde(default)]
+    pub summary: String,
+    #[serde(default)]
+    pub body: String,
+    #[serde(default)]
+    pub tags: Vec<String>,
+}
+
+fn now() -> i64 {
+    std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .map(|duration| duration.as_secs() as i64)
+        .unwrap_or(0)
+}
+
+fn validate(patch: &EntryPatch) -> Result<(), StashError> {
+    if patch.name.trim().is_empty() {
+        return Err(StashError::InvalidDirectory("标题不能为空".into()));
+    }
+    if patch.name.chars().count() > MAX_NAME {
+        return Err(StashError::InvalidDirectory(format!(
+            "标题最多 {MAX_NAME} 个字"
+        )));
+    }
+    if patch.body.chars().count() > MAX_BODY {
+        return Err(StashError::InvalidDirectory("正文过长".into()));
+    }
+    if patch.tags.len() > MAX_TAGS {
+        return Err(StashError::InvalidDirectory(format!(
+            "标签最多 {MAX_TAGS} 个"
+        )));
+    }
+    for tag in &patch.tags {
+        if tag.chars().count() > MAX_TAG_LEN {
+            return Err(StashError::InvalidDirectory(format!(
+                "单个标签最多 {MAX_TAG_LEN} 个字"
+            )));
+        }
+    }
+    Ok(())
+}
+
+/// 读一条条目（编辑表单用），不存在返回 None。
+pub fn load(conn: &Connection, key: &str) -> Result<Option<EntryRecord>, StashError> {
+    let row = conn
+        .query_row(
+            "SELECT key, name, COALESCE(description, ''), COALESCE(icon, ''), COALESCE(href, ''),
+                    COALESCE(cover, ''), COALESCE(banner, ''), COALESCE(badge, ''),
+                    COALESCE(comment, ''), COALESCE(summary, ''), COALESCE(body, ''), updated_at
+             FROM entry WHERE key = ?1",
+            [key],
+            |row| {
+                Ok(EntryRecord {
+                    key: row.get(0)?,
+                    name: row.get(1)?,
+                    description: row.get(2)?,
+                    icon: row.get(3)?,
+                    href: row.get(4)?,
+                    cover: row.get(5)?,
+                    banner: row.get(6)?,
+                    badge: row.get(7)?,
+                    comment: row.get(8)?,
+                    summary: row.get(9)?,
+                    body: row.get(10)?,
+                    tags: Vec::new(),
+                    updated_at: row.get(11)?,
+                })
+            },
+        )
+        .optional()
+        .map_err(map_error)?;
+
+    let Some(mut entry) = row else {
+        return Ok(None);
+    };
+
+    let mut statement = conn
+        .prepare("SELECT label FROM entry_tag WHERE entry_key = ?1 ORDER BY sort")
+        .map_err(map_error)?;
+    entry.tags = statement
+        .query_map([key], |row| row.get::<_, String>(0))
+        .map_err(map_error)?
+        .collect::<Result<Vec<_>, _>>()
+        .map_err(map_error)?;
+
+    Ok(Some(entry))
+}
+
+/// 更新条目；`expected_updated_at` 与库里不一致时冲突。
+pub fn update(
+    conn: &mut Connection,
+    key: &str,
+    patch: EntryPatch,
+    expected_updated_at: i64,
+) -> Result<EntryRecord, StashError> {
+    validate(&patch)?;
+
+    let tags: Vec<String> = patch
+        .tags
+        .iter()
+        .map(|tag| tag.trim().to_string())
+        .filter(|tag| !tag.is_empty())
+        .collect();
+
+    let timestamp = now();
+    let tx = conn.transaction().map_err(map_error)?;
+
+    let updated = tx
+        .execute(
+            "UPDATE entry SET
+                name = ?1, description = ?2, icon = ?3, href = ?4,
+                cover = ?5, banner = ?6, badge = ?7, comment = ?8,
+                summary = ?9, body = ?10, updated_at = ?11
+             WHERE key = ?12 AND updated_at = ?13",
+            params![
+                patch.name.trim(),
+                patch.description,
+                patch.icon,
+                patch.href,
+                patch.cover,
+                patch.banner,
+                patch.badge,
+                patch.comment,
+                patch.summary,
+                patch.body,
+                timestamp,
+                key,
+                expected_updated_at
+            ],
+        )
+        .map_err(map_error)?;
+
+    if updated == 0 {
+        return Err(StashError::Conflict(
+            "条目已被修改，请刷新后重试".into(),
+        ));
+    }
+
+    tx.execute("DELETE FROM entry_tag WHERE entry_key = ?1", [key])
+        .map_err(map_error)?;
+    for (index, tag) in tags.iter().enumerate() {
+        tx.execute(
+            "INSERT INTO entry_tag (entry_key, sort, label) VALUES (?1, ?2, ?3)",
+            params![key, index as i64, tag],
+        )
+        .map_err(map_error)?;
+    }
+
+    tx.execute(
+        "INSERT INTO audit (at, action, target, detail) VALUES (?1, 'item.update', ?2, ?3)",
+        params![timestamp, key, patch.name.trim()],
+    )
+    .map_err(map_error)?;
+
+    tx.commit().map_err(map_error)?;
+
+    load(conn, key)?
+        .ok_or_else(|| StashError::NotFound(format!("条目不存在: {key}")))
+}
+
+/// 记录一条审计（设置保存等）。
+pub fn audit(conn: &Connection, action: &str, target: &str, detail: &str) -> Result<(), StashError> {
+    conn.execute(
+        "INSERT INTO audit (at, action, target, detail) VALUES (?1, ?2, ?3, ?4)",
+        params![now(), action, target, detail],
+    )
+    .map_err(map_error)?;
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn db() -> Connection {
+        let conn = Connection::open_in_memory().expect("内存库应能打开");
+        conn.execute_batch(
+            "CREATE TABLE entry (
+                key TEXT PRIMARY KEY,
+                node_key TEXT NOT NULL,
+                name TEXT NOT NULL,
+                description TEXT, icon TEXT, href TEXT, cover TEXT, banner TEXT,
+                badge TEXT, comment TEXT, summary TEXT, body TEXT,
+                hot INTEGER NOT NULL DEFAULT 0, views INTEGER NOT NULL DEFAULT 0,
+                likes INTEGER NOT NULL DEFAULT 0, sort INTEGER NOT NULL DEFAULT 0,
+                updated_at INTEGER NOT NULL DEFAULT 0
+             );
+             CREATE TABLE entry_tag (
+                entry_key TEXT NOT NULL,
+                sort INTEGER NOT NULL DEFAULT 0,
+                label TEXT NOT NULL,
+                PRIMARY KEY (entry_key, sort)
+             );
+             CREATE TABLE audit (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                at INTEGER NOT NULL,
+                action TEXT NOT NULL,
+                target TEXT,
+                detail TEXT
+             );
+             INSERT INTO entry (key, node_key, name, updated_at) VALUES ('movie-1', 'movie', '千与千寻', 0);",
+        )
+        .expect("应能建表");
+        conn
+    }
+
+    fn patch(name: &str) -> EntryPatch {
+        EntryPatch {
+            name: name.into(),
+            description: "简介".into(),
+            icon: String::new(),
+            href: "https://example.com".into(),
+            cover: String::new(),
+            banner: String::new(),
+            badge: "推荐".into(),
+            comment: "一句话".into(),
+            summary: "正文".into(),
+            body: "## 标题".into(),
+            tags: vec!["推荐电影".into(), "动画".into()],
+        }
+    }
+
+    #[test]
+    fn update_replaces_fields_and_tags() {
+        let mut conn = db();
+        let saved = update(&mut conn, "movie-1", patch("千与千寻 2"), 0).expect("应能更新");
+        assert_eq!(saved.name, "千与千寻 2");
+        assert_eq!(saved.tags, vec!["推荐电影".to_string(), "动画".to_string()]);
+        assert!(saved.updated_at > 0);
+
+        let audit: i64 = conn
+            .query_row("SELECT COUNT(*) FROM audit", [], |row| row.get(0))
+            .expect("应能查审计");
+        assert_eq!(audit, 1);
+    }
+
+    #[test]
+    fn stale_timestamp_conflicts() {
+        let mut conn = db();
+        let saved = update(&mut conn, "movie-1", patch("A"), 0).expect("应能更新");
+        let error = update(&mut conn, "movie-1", patch("B"), saved.updated_at - 1)
+            .expect_err("应冲突");
+        assert!(matches!(error, StashError::Conflict(_)));
+    }
+
+    #[test]
+    fn rejects_empty_name() {
+        let mut conn = db();
+        assert!(update(&mut conn, "movie-1", patch("  "), 0).is_err());
+    }
+
+    #[test]
+    fn missing_entry_is_not_found() {
+        let mut conn = db();
+        let error = update(&mut conn, "none", patch("X"), 0).expect_err("应不存在");
+        assert!(matches!(error, StashError::Conflict(_) | StashError::NotFound(_)));
+    }
+}
diff --git a/src/db/mod.rs b/src/db/mod.rs
index c136cec..4e5df82 100644
--- a/src/db/mod.rs
+++ b/src/db/mod.rs
@@ -10,6 +10,7 @@
 
 pub mod auth;
 mod catalog;
+pub mod entries;
 mod schema;
 pub mod settings;
 
@@ -27,6 +28,8 @@ pub use schema::SeedReport;
 pub use auth::SessionState;
 /// 站点设置：页头滚动信息 + 侧栏顺序/显隐。
 pub use settings::{Settings, SettingsDocument};
+/// 条目编辑（P2）。
+pub use entries::{EntryPatch, EntryRecord};
 
 /// 一次查询得到的完整内容目录。
 ///
@@ -169,7 +172,26 @@ impl Db {
         expected_version: i64,
     ) -> Result<SettingsDocument, StashError> {
         let mut conn = self.lock()?;
-        settings::save(&mut conn, next, expected_version)
+        let document = settings::save(&mut conn, next, expected_version)?;
+        entries::audit(&conn, "settings.update", "site", "站点设置")?;
+        Ok(document)
+    }
+
+    // ---------- 条目编辑 ----------
+
+    pub fn load_entry(&self, key: &str) -> Result<Option<EntryRecord>, StashError> {
+        let conn = self.lock()?;
+        entries::load(&conn, key)
+    }
+
+    pub fn update_entry(
+        &self,
+        key: &str,
+        patch: EntryPatch,
+        expected_updated_at: i64,
+    ) -> Result<EntryRecord, StashError> {
+        let mut conn = self.lock()?;
+        entries::update(&mut conn, key, patch, expected_updated_at)
     }
 }
 
@@ -518,6 +540,7 @@ mod tests {
         fresh
             .execute_batch(
                 "CREATE TABLE node (key TEXT PRIMARY KEY);
+                 CREATE TABLE entry (key TEXT PRIMARY KEY, node_key TEXT NOT NULL, name TEXT NOT NULL);
                  PRAGMA user_version = 15;",
             )
             .expect("应能造出 v15 老库");
diff --git a/src/db/schema.rs b/src/db/schema.rs
index ef4fc1a..8a4d3cb 100644
--- a/src/db/schema.rs
+++ b/src/db/schema.rs
@@ -75,7 +75,8 @@ CREATE TABLE IF NOT EXISTS entry (
     hot           INTEGER NOT NULL DEFAULT 0 CHECK (hot IN (0, 1)),-- 是否热门：列表里显示 HOT 徽标
     views         INTEGER NOT NULL DEFAULT 0,                    -- 浏览量，详情页操作条「眼睛」后的数字
     likes         INTEGER NOT NULL DEFAULT 0,                    -- 点赞数，详情页操作条「赞」后的数字
-    sort          INTEGER NOT NULL DEFAULT 0                     -- 条目顺序（组内或分区内），越小越靠前
+    sort          INTEGER NOT NULL DEFAULT 0,                    -- 条目顺序（组内或分区内），越小越靠前
+    updated_at    INTEGER NOT NULL DEFAULT 0                     -- 最近一次编辑时间（unix 秒），0 = 从未编辑
 );
 
 CREATE INDEX IF NOT EXISTS entry_parent_idx ON entry(node_key, sort);
@@ -128,6 +129,29 @@ CREATE TABLE IF NOT EXISTS setting (
     version    INTEGER NOT NULL DEFAULT 1,
     updated_at INTEGER NOT NULL
 );
+
+-- ========== v17：审计 ==========
+
+CREATE TABLE IF NOT EXISTS audit (
+    id     INTEGER PRIMARY KEY AUTOINCREMENT,
+    at     INTEGER NOT NULL,
+    action TEXT NOT NULL,
+    target TEXT,
+    detail TEXT
+);
+"#;
+
+/// v16 → v17：条目加 `updated_at`（乐观锁），新增审计表。
+const V17_SQL: &str = r#"
+ALTER TABLE entry ADD COLUMN updated_at INTEGER NOT NULL DEFAULT 0;
+
+CREATE TABLE IF NOT EXISTS audit (
+    id     INTEGER PRIMARY KEY AUTOINCREMENT,
+    at     INTEGER NOT NULL,
+    action TEXT NOT NULL,
+    target TEXT,
+    detail TEXT
+);
 "#;
 
 /// v15 → v16 的增量（老库升级用；新库直接走 SCHEMA_SQL）。
@@ -171,7 +195,7 @@ pub struct SeedReport {
 ///
 /// 从 v16 起有了第一套迁移：`migrate` 会把老库逐级升上来，
 /// 只有「比程序更新」或「没有迁移路径」的版本才拒绝启动。
-pub const SCHEMA_VERSION: i64 = 16;
+pub const SCHEMA_VERSION: i64 = 17;
 
 fn current_version(conn: &Connection) -> Result<i64, StashError> {
     conn.pragma_query_value(None, "user_version", |row| row.get(0))
@@ -180,10 +204,7 @@ fn current_version(conn: &Connection) -> Result<i64, StashError> {
 
 /// 把库升到 `SCHEMA_VERSION`，返回升级后的版本。
 ///
-/// - 0：全新库，建全量结构；
-/// - 15：补 v16 的登录/设置表；
-/// - 16：已是最新；
-/// - 其它：拒绝启动（不猜结构）。
+/// 逐级迁移：0 建全量；15 → 16 → 17；已最新直接返回；更高版本拒绝。
 pub fn migrate(conn: &Connection) -> Result<i64, StashError> {
     let mut version = current_version(conn)?;
 
@@ -213,6 +234,11 @@ pub fn migrate(conn: &Connection) -> Result<i64, StashError> {
         version = 16;
     }
 
+    if version == 16 {
+        conn.execute_batch(V17_SQL).map_err(map_error)?;
+        version = 17;
+    }
+
     conn.pragma_update(None, "user_version", version)
         .map_err(map_error)?;
 
diff --git a/src/server.rs b/src/server.rs
index 318b3cb..24ef2b2 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -581,6 +581,112 @@ async fn patch_settings(
     }
 }
 
+// ---------------- 条目编辑 / 备份 ----------------
+
+/// GET /api/items/{key} —— 编辑表单的初始值（公开，便于未登录时预览）
+async fn get_item(State(state): State<AppState>, Path(key): Path<String>) -> Response {
+    let db = Arc::clone(&state.db);
+    match tokio::task::spawn_blocking(move || db.load_entry(&key)).await {
+        Ok(Ok(Some(entry))) => Json(entry).into_response(),
+        Ok(Ok(None)) => api_error(StatusCode::NOT_FOUND, "条目不存在"),
+        Ok(Err(error)) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error.to_string()),
+        Err(error) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error.to_string()),
+    }
+}
+
+#[derive(serde::Deserialize)]
+struct ItemPatchBody {
+    #[serde(rename = "updatedAt")]
+    updated_at: i64,
+    item: crate::db::EntryPatch,
+}
+
+/// PATCH /api/items/{key} —— 需要登录，`updatedAt` 乐观锁
+async fn patch_item(
+    State(state): State<AppState>,
+    Path(key): Path<String>,
+    headers: HeaderMap,
+    Json(body): Json<ItemPatchBody>,
+) -> Response {
+    if !same_origin(&headers) {
+        return api_error(StatusCode::FORBIDDEN, "跨站请求被拒绝");
+    }
+
+    match read_session(&state, &headers).await {
+        Ok(session) if session.authenticated => {}
+        Ok(_) => return api_error(StatusCode::UNAUTHORIZED, "请先登录"),
+        Err(response) => return response,
+    }
+
+    let db = Arc::clone(&state.db);
+    let (patch, updated_at) = (body.item, body.updated_at);
+    match tokio::task::spawn_blocking(move || db.update_entry(&key, patch, updated_at)).await {
+        Ok(Ok(entry)) => Json(entry).into_response(),
+        Ok(Err(StashError::Conflict(message))) => api_error(StatusCode::CONFLICT, &message),
+        Ok(Err(StashError::NotFound(message))) => api_error(StatusCode::NOT_FOUND, &message),
+        Ok(Err(StashError::InvalidDirectory(message))) => {
+            api_error(StatusCode::BAD_REQUEST, &message)
+        }
+        Ok(Err(error)) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error.to_string()),
+        Err(error) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error.to_string()),
+    }
+}
+
+/// GET /api/backup —— 下载整库快照（需要登录）。
+///
+/// 用 SQLite 的 `VACUUM INTO` 生成一致性副本，避免直接复制正在写的文件。
+async fn backup_db(State(state): State<AppState>, headers: HeaderMap) -> Response {
+    match read_session(&state, &headers).await {
+        Ok(session) if session.authenticated => {}
+        Ok(_) => return api_error(StatusCode::UNAUTHORIZED, "请先登录"),
+        Err(response) => return response,
+    }
+
+    let db_path = state.config.db_path.clone();
+    let created = tokio::task::spawn_blocking(move || -> Result<Vec<u8>, String> {
+        let target = db_path.with_file_name(format!(
+            "stash-backup-{}.db",
+            std::time::SystemTime::now()
+                .duration_since(std::time::UNIX_EPOCH)
+                .map(|duration| duration.as_secs())
+                .unwrap_or(0)
+        ));
+
+        let conn = rusqlite::Connection::open(&db_path).map_err(|error| error.to_string())?;
+        conn.execute("VACUUM INTO ?1", [target.to_string_lossy().as_ref()])
+            .map_err(|error| error.to_string())?;
+        let bytes = std::fs::read(&target).map_err(|error| error.to_string())?;
+        let _ = std::fs::remove_file(&target);
+        Ok(bytes)
+    })
+    .await;
+
+    match created {
+        Ok(Ok(bytes)) => {
+            let filename = format!(
+                "stash-backup-{}.db",
+                std::time::SystemTime::now()
+                    .duration_since(std::time::UNIX_EPOCH)
+                    .map(|duration| duration.as_secs())
+                    .unwrap_or(0)
+            );
+            (
+                [
+                    (header::CONTENT_TYPE, "application/octet-stream".to_string()),
+                    (
+                        header::CONTENT_DISPOSITION,
+                        format!("attachment; filename=\"{filename}\""),
+                    ),
+                ],
+                bytes,
+            )
+                .into_response()
+        }
+        Ok(Err(error)) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error),
+        Err(error) => api_error(StatusCode::INTERNAL_SERVER_ERROR, &error.to_string()),
+    }
+}
+
 /// 组装路由：API + 内嵌前端 + 托管目录。
 /// 单独抽出来是为了测试能直接对 `Router` 发请求：`start` 要绑定端口、
 /// 起监听任务，没法在单元测试里用。
@@ -607,6 +713,8 @@ fn build_router(state: AppState) -> Router {
         .route("/api/auth/logout", post(auth_logout))
         .route("/api/auth/password", patch(auth_password))
         .route("/api/settings", get(get_settings).patch(patch_settings))
+        .route("/api/items/{key}", get(get_item).patch(patch_item))
+        .route("/api/backup", get(backup_db))
         .route("/", get(web_index))
         .route("/index.html", get(web_index))
         .route("/favicon.svg", get(web_root_file))
diff --git a/stash-web/src/App.tsx b/stash-web/src/App.tsx
index 7b80ef7..1f159b1 100644
--- a/stash-web/src/App.tsx
+++ b/stash-web/src/App.tsx
@@ -36,6 +36,7 @@ import {
   type SettingsDocument,
 } from './settings'
 import { LoginDialog } from './components/auth/LoginDialog'
+import { ItemEditor } from './components/content/ItemEditor'
 import { parseViewPath, viewPath, type View } from './data/view'
 import './App.css'
 
@@ -52,6 +53,7 @@ export default function App() {
     settings: defaultSettings(),
   })
   const [loginOpen, setLoginOpen] = useState(false)
+  const [editingKey, setEditingKey] = useState<string | null>(null)
   const [scrolled, setScrolled] = useState(false)
   const searchRef = useRef<HTMLInputElement>(null)
 
@@ -253,6 +255,7 @@ export default function App() {
           categoryId={itemCategory.id}
           categoryTitle={itemCategory.title}
           onNavigate={navigateHref}
+          onEdit={() => setEditingKey(itemView.itemId)}
         />
       )
     }
@@ -272,6 +275,7 @@ export default function App() {
         related={relatedItems}
         onNavigate={navigateHref}
         onOpenItem={(itemId) => openItem(itemCategory.id, itemId)}
+        onEdit={() => setEditingKey(itemView.itemId)}
       />
     )
   }
@@ -295,6 +299,13 @@ export default function App() {
         }}
       />
 
+      <ItemEditor
+        open={editingKey !== null}
+        itemKey={editingKey}
+        onClose={() => setEditingKey(null)}
+        onSaved={() => catalog.reload()}
+      />
+
       {/* 主题的顶部背景图：固定 65vh，底部渐隐到页面底色 */}
       <div className="site-background" aria-hidden="true" />
 
diff --git a/stash-web/src/components/admin/AdminPage.tsx b/stash-web/src/components/admin/AdminPage.tsx
index 0daf83f..da95fb3 100644
--- a/stash-web/src/components/admin/AdminPage.tsx
+++ b/stash-web/src/components/admin/AdminPage.tsx
@@ -13,7 +13,7 @@ import {
   Title,
 } from '@stash/ui'
 import { useEffect, useMemo, useState } from 'react'
-import { fetchSession, logout, type SessionState } from '../../auth'
+import { changePassword, fetchSession, logout, type SessionState } from '../../auth'
 import { LoginDialog } from '../auth/LoginDialog'
 import {
   fetchSettings,
@@ -138,6 +138,7 @@ export function AdminPage() {
                 items={[
                   { key: 'header', label: '页头滚动信息' },
                   { key: 'sidebar', label: '侧栏导航' },
+                  { key: 'system', label: '系统' },
                 ]}
                 activeKey={tab}
                 onChange={setTab}
@@ -154,12 +155,14 @@ export function AdminPage() {
                   value={draft.header}
                   onChange={(header) => setDraft({ ...draft, header })}
                 />
-              ) : (
+              ) : tab === 'sidebar' ? (
                 <SidebarForm
                   categories={categories}
                   value={draft.sidebar}
                   onChange={(sidebar) => setDraft({ ...draft, sidebar })}
                 />
+              ) : (
+                <SystemPanel />
               )}
 
               <Space gap="sm" justify="end">
@@ -362,8 +365,75 @@ function SidebarForm({
   )
 }
 
-// ---------- 行内按钮组 ----------
+// ---------- 系统 ----------
 
+function SystemPanel() {
+  const [current, setCurrent] = useState('')
+  const [next, setNext] = useState('')
+  const [busy, setBusy] = useState(false)
+  const [message, setMessage] = useState<{ tone: 'info' | 'error'; text: string } | null>(null)
+
+  const change = async () => {
+    setBusy(true)
+    setMessage(null)
+    const result = await changePassword(current, next)
+    setBusy(false)
+    if (!result.ok) {
+      setMessage({ tone: 'error', text: result.error })
+      return
+    }
+    setMessage({ tone: 'info', text: '密码已修改，所有会话已失效，请重新登录' })
+    setCurrent('')
+    setNext('')
+  }
+
+  return (
+    <Space direction="column" gap="lg" align="stretch" className="admin-form">
+      <FormField label="当前密码" htmlFor="current-password">
+        <Input
+          id="current-password"
+          type="password"
+          value={current}
+          onChange={(event) => setCurrent(event.target.value)}
+        />
+      </FormField>
+      <FormField label="新密码" htmlFor="next-password" hint="至少 8 位">
+        <Input
+          id="next-password"
+          type="password"
+          value={next}
+          onChange={(event) => setNext(event.target.value)}
+        />
+      </FormField>
+      {message !== null && (
+        <Notice tone={message.tone} title={message.tone === 'info' ? '已修改' : '修改失败'}>
+          {message.text}
+        </Notice>
+      )}
+      <Button
+        variant="secondary"
+        loading={busy}
+        icon={<Icon name="key_2_line" />}
+        onClick={change}
+      >
+        修改密码
+      </Button>
+
+      <Text size="sm" tone="muted">
+        备份：下载一份 SQLite 快照（VACUUM INTO 生成，一致性副本）。恢复时停掉服务，用它替换
+        data/stash.db 再启动。
+      </Text>
+      <Button
+        icon={<Icon name="download_line" />}
+        onClick={() => window.location.assign('/api/backup')}
+      >
+        下载备份
+      </Button>
+    </Space>
+  )
+}
+
+// ---------- 行内按钮组 ----------
 function IconButtonGroup({
   onUp,
   onDown,
diff --git a/stash-web/src/components/content/ArticleDetailView.tsx b/stash-web/src/components/content/ArticleDetailView.tsx
index fbdbb30..4c48fbe 100644
--- a/stash-web/src/components/content/ArticleDetailView.tsx
+++ b/stash-web/src/components/content/ArticleDetailView.tsx
@@ -15,6 +15,7 @@ type ArticleDetailViewProps = {
   categoryId: string
   categoryTitle: string
   onNavigate: (href: string) => void
+  onEdit: () => void
 }
 
 export function ArticleDetailView({
@@ -22,6 +23,7 @@ export function ArticleDetailView({
   categoryId,
   categoryTitle,
   onNavigate,
+  onEdit,
 }: ArticleDetailViewProps) {
   const meta = article.meta ?? ['2 年前', categoryTitle]
   const crumbs = [
@@ -39,7 +41,7 @@ export function ArticleDetailView({
       <header className="article-head">
         <Title level={1} as="h2" className="article-heading">
           {article.title}
-          <button type="button" className="item-edit" disabled title="编辑功能待接入">
+          <button type="button" className="item-edit" title="编辑文章" onClick={onEdit}>
             [编辑]
           </button>
         </Title>
diff --git a/stash-web/src/components/content/ItemDetailView.tsx b/stash-web/src/components/content/ItemDetailView.tsx
index 2c9efef..d96ed51 100644
--- a/stash-web/src/components/content/ItemDetailView.tsx
+++ b/stash-web/src/components/content/ItemDetailView.tsx
@@ -27,6 +27,8 @@ type ItemDetailViewProps = {
   related: RelatedItem[]
   onNavigate: (href: string) => void
   onOpenItem: (itemId: string) => void
+  /** 打开编辑 Drawer */
+  onEdit: () => void
 }
 
 export function ItemDetailView({
@@ -35,6 +37,7 @@ export function ItemDetailView({
   related,
   onNavigate,
   onOpenItem,
+  onEdit,
 }: ItemDetailViewProps) {
   return (
     <div className="detail-view item-view">
@@ -45,7 +48,7 @@ export function ItemDetailView({
       <Card padding="none" className="item-card">
         <Title level={1} as="h2" weight="semibold" className="item-title">
           {model.title}
-          <button type="button" className="item-edit" disabled title="编辑功能待接入">
+          <button type="button" className="item-edit" title="编辑条目" onClick={onEdit}>
             [编辑]
           </button>
         </Title>
diff --git a/stash-web/src/components/content/ItemEditor.tsx b/stash-web/src/components/content/ItemEditor.tsx
new file mode 100644
index 0000000..57b12f1
--- /dev/null
+++ b/stash-web/src/components/content/ItemEditor.tsx
@@ -0,0 +1,203 @@
+import { Button, Drawer, FormField, Icon, Input, Notice, Space, Textarea } from '@stash/ui'
+import { useEffect, useState } from 'react'
+import { fetchItem, saveItem, type EntryRecord } from '../../items'
+
+/**
+ * 条目编辑器（P2）：右侧 Drawer 表单，就地改标题 / 简介 / 标签 / 正文等。
+ *
+ * `updatedAt` 做乐观锁：别人先改过就提示刷新，避免静默覆盖。
+ */
+type ItemEditorProps = {
+  open: boolean
+  itemKey: string | null
+  onClose: () => void
+  onSaved: (entry: EntryRecord) => void
+}
+
+type FormState = {
+  name: string
+  description: string
+  tags: string
+  badge: string
+  comment: string
+  summary: string
+  body: string
+  cover: string
+  banner: string
+  href: string
+}
+
+const emptyForm: FormState = {
+  name: '',
+  description: '',
+  tags: '',
+  badge: '',
+  comment: '',
+  summary: '',
+  body: '',
+  cover: '',
+  banner: '',
+  href: '',
+}
+
+export function ItemEditor({ open, itemKey, onClose, onSaved }: ItemEditorProps) {
+  const [entry, setEntry] = useState<EntryRecord | null>(null)
+  const [form, setForm] = useState<FormState>(emptyForm)
+  const [loading, setLoading] = useState(false)
+  const [saving, setSaving] = useState(false)
+  const [error, setError] = useState('')
+
+  useEffect(() => {
+    if (!open || itemKey === null) return
+
+    let alive = true
+    setLoading(true)
+    setError('')
+    fetchItem(itemKey).then((result) => {
+      if (!alive) return
+      setLoading(false)
+      if (!result.ok) {
+        setError(result.error)
+        return
+      }
+
+      const next = result.entry
+      setEntry(next)
+      setForm({
+        name: next.name,
+        description: next.description,
+        tags: next.tags.join('，'),
+        badge: next.badge,
+        comment: next.comment,
+        summary: next.summary,
+        body: next.body,
+        cover: next.cover,
+        banner: next.banner,
+        href: next.href,
+      })
+    })
+
+    return () => {
+      alive = false
+    }
+  }, [open, itemKey])
+
+  const update = (patch: Partial<FormState>) => setForm((previous) => ({ ...previous, ...patch }))
+
+  const save = async () => {
+    if (entry === null) return
+    setSaving(true)
+    setError('')
+
+    const result = await saveItem(entry.key, entry.updated_at, {
+      ...form,
+      tags: form.tags
+        .split(/[，,]/)
+        .map((tag) => tag.trim())
+        .filter(Boolean),
+    })
+
+    setSaving(false)
+    if (!result.ok) {
+      setError(result.error)
+      return
+    }
+
+    onSaved(result.entry)
+    onClose()
+  }
+
+  return (
+    <Drawer
+      open={open}
+      onClose={onClose}
+      width={520}
+      title="编辑条目"
+      footer={
+        <Space gap="sm" justify="end">
+          <Button variant="secondary" onClick={onClose}>
+            取消
+          </Button>
+          <Button
+            loading={saving}
+            disabled={loading}
+            icon={<Icon name="check_line" />}
+            onClick={save}
+          >
+            保存
+          </Button>
+        </Space>
+      }
+    >
+      {loading && <p>正在读取…</p>}
+      {error !== '' && (
+        <Notice tone="error" title="保存失败">
+          {error}
+        </Notice>
+      )}
+
+      {!loading && entry !== null && (
+        <Space direction="column" gap="md" align="stretch">
+          <FormField label="标题" htmlFor="edit-name" required>
+            <Input
+              id="edit-name"
+              value={form.name}
+              onChange={(event) => update({ name: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="简介" htmlFor="edit-description" hint="列表卡片上的一行说明">
+            <Input
+              id="edit-description"
+              value={form.description}
+              onChange={(event) => update({ description: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="标签" htmlFor="edit-tags" hint="用逗号分隔，例如：推荐电影，动画">
+            <Input
+              id="edit-tags"
+              value={form.tags}
+              onChange={(event) => update({ tags: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="一句话评价" htmlFor="edit-comment">
+            <Input
+              id="edit-comment"
+              value={form.comment}
+              onChange={(event) => update({ comment: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="正文" htmlFor="edit-body" hint="支持 Markdown：##、段落、链接、图片">
+            <Textarea
+              id="edit-body"
+              rows={8}
+              value={form.body}
+              onChange={(event) => update({ body: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="封面地址" htmlFor="edit-cover">
+            <Input
+              id="edit-cover"
+              value={form.cover}
+              placeholder="https://…"
+              onChange={(event) => update({ cover: event.target.value })}
+            />
+          </FormField>
+
+          <FormField label="跳转地址" htmlFor="edit-href">
+            <Input
+              id="edit-href"
+              value={form.href}
+              placeholder="https://…"
+              onChange={(event) => update({ href: event.target.value })}
+            />
+          </FormField>
+        </Space>
+      )}
+    </Drawer>
+  )
+}
diff --git a/stash-web/src/items.ts b/stash-web/src/items.ts
new file mode 100644
index 0000000..e8eaf46
--- /dev/null
+++ b/stash-web/src/items.ts
@@ -0,0 +1,80 @@
+/**
+ * 条目编辑的前端接口。
+ *
+ * 读取是公开的（编辑表单要能预览），写入必须登录，并用 `updatedAt` 做乐观锁。
+ */
+export type EntryRecord = {
+  key: string
+  name: string
+  description: string
+  icon: string
+  href: string
+  cover: string
+  banner: string
+  badge: string
+  comment: string
+  summary: string
+  body: string
+  tags: string[]
+  updated_at: number
+}
+
+export type EntryInput = {
+  name: string
+  description: string
+  tags: string[]
+  badge: string
+  comment: string
+  summary: string
+  body: string
+  cover: string
+  banner: string
+  href: string
+}
+
+export type ItemResult =
+  | { ok: true; entry: EntryRecord }
+  | { ok: false; status: number; error: string }
+
+export async function fetchItem(key: string): Promise<ItemResult> {
+  try {
+    const response = await fetch(`/api/items/${encodeURIComponent(key)}`, {
+      credentials: 'same-origin',
+    })
+    if (response.ok) {
+      return { ok: true, entry: (await response.json()) as EntryRecord }
+    }
+    const payload = (await response.json().catch(() => null)) as { error?: string } | null
+    return { ok: false, status: response.status, error: payload?.error ?? '读取失败' }
+  } catch (error) {
+    return { ok: false, status: 0, error: error instanceof Error ? error.message : '网络错误' }
+  }
+}
+
+export async function saveItem(
+  key: string,
+  updatedAt: number,
+  item: EntryInput,
+): Promise<ItemResult> {
+  try {
+    const response = await fetch(`/api/items/${encodeURIComponent(key)}`, {
+      method: 'PATCH',
+      credentials: 'same-origin',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({ updatedAt, item }),
+    })
+
+    if (response.ok) {
+      return { ok: true, entry: (await response.json()) as EntryRecord }
+    }
+
+    const payload = (await response.json().catch(() => null)) as { error?: string } | null
+    return {
+      ok: false,
+      status: response.status,
+      error: payload?.error ?? `保存失败（${response.status}）`,
+    }
+  } catch (error) {
+    return { ok: false, status: 0, error: error instanceof Error ? error.message : '网络错误' }
+  }
+}