diff --git a/assets/css/style.css b/assets/css/style.css
index 9d90491..f84066a 100644
--- a/assets/css/style.css
+++ b/assets/css/style.css
@@ -308,7 +308,7 @@ input { font-family: inherit; }
 }
 
 .sidebar-section-content {
-    overflow: hidden;
+    overflow: hidden auto;
     max-height: 600px;
     transition: max-height 0.28s cubic-bezier(0.4, 0, 0.2, 1), 
                 opacity 0.2s ease,
@@ -317,6 +317,24 @@ input { font-family: inherit; }
     margin-bottom: var(--spacer-sm);
 }
 
+/* 侧边栏内容滚动条美化 */
+.sidebar-section-content::-webkit-scrollbar {
+    width: 4px;
+}
+
+.sidebar-section-content::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+.sidebar-section-content::-webkit-scrollbar-thumb {
+    background: var(--border-gray);
+    border-radius: 2px;
+}
+
+.sidebar-section-content::-webkit-scrollbar-thumb:hover {
+    background: var(--text-light);
+}
+
 .sidebar-section-group.collapsed .sidebar-section-content {
     max-height: 0;
     opacity: 0;
diff --git a/src/db/metadata.rs b/src/db/metadata.rs
index dfaf31f..458ab95 100644
--- a/src/db/metadata.rs
+++ b/src/db/metadata.rs
@@ -1,6 +1,6 @@
 use super::Database;
 use crate::models::*;
-use sqlx::Row;
+use sqlx::{Acquire, Row};
 use uuid::Uuid;
 
 impl Database {
@@ -234,12 +234,35 @@ impl Database {
     pub async fn update_album_tags(&self, album_id: &str, tags_json: &str, all_words_json: &str) {
         sqlx::query("UPDATE albums SET tags = ?, all_words = ?, processed_at = datetime('now') WHERE id = ?")
             .bind(tags_json).bind(all_words_json).bind(album_id).execute(&self.pool).await.ok();
-        sqlx::query("DELETE FROM album_tags WHERE album_id = ?").bind(album_id).execute(&self.pool).await.ok();
+
+        // 用一个事务批量替换 album_tags，避免逐条 autocommit 导致巨慢
         if let Ok(tags) = serde_json::from_str::<Vec<String>>(tags_json) {
-            for tag in &tags {
-                sqlx::query("INSERT OR IGNORE INTO album_tags (album_id, tag) VALUES (?, ?)")
-                    .bind(album_id).bind(tag).execute(&self.pool).await.ok();
+            let mut tx = match self.pool.begin().await {
+                Ok(t) => t,
+                Err(_) => return,
+            };
+
+            // 单条 DELETE + 一条多值 INSERT
+            sqlx::query("DELETE FROM album_tags WHERE album_id = ?")
+                .bind(album_id)
+                .execute(&mut *tx)
+                .await.ok();
+
+            // 构建多值 INSERT, 避免逐条执行
+            if !tags.is_empty() {
+                let placeholders: Vec<String> = tags.iter().map(|_| "(?, ?)".to_string()).collect();
+                let sql = format!(
+                    "INSERT OR IGNORE INTO album_tags (album_id, tag) VALUES {}",
+                    placeholders.join(", ")
+                );
+                let mut q = sqlx::query(&sql);
+                for tag in &tags {
+                    q = q.bind(album_id).bind(tag);
+                }
+                q.execute(&mut *tx).await.ok();
             }
+
+            tx.commit().await.ok();
         }
     }