update code level

src/search_db/search.rs

@@ -339,4 +339,30 @@ impl SearchDb {
         results.sort_by(|a, b| b.total_albums.cmp(&a.total_albums));
         results
     }
+
+    // ═══════════════════════════════════════
+    //  元数据统计
+    // ═══════════════════════════════════════
+
+    /// 获取全局统计信息
+    pub async fn get_metadata_stats(&self) -> MetadataStats {
+        let total_persons: i64 = sqlx::query_scalar("SELECT COUNT(*) FROM persons")
+            .fetch_one(&self.pool).await.unwrap_or(0);
+        let total_aliases: i64 = sqlx::query_scalar("SELECT COUNT(*) FROM person_aliases")
+            .fetch_one(&self.pool).await.unwrap_or(0);
+        let total_albums: i64 = sqlx::query_scalar("SELECT COUNT(*) FROM albums")
+            .fetch_one(&self.pool).await.unwrap_or(0);
+        let total_images: i64 = sqlx::query_scalar("SELECT COALESCE(SUM(image_count), 0) FROM albums")
+            .fetch_one(&self.pool).await.unwrap_or(0);
+        let total_tags: i64 = sqlx::query_scalar("SELECT COUNT(*) FROM album_tags")
+            .fetch_one(&self.pool).await.unwrap_or(0);
+
+        MetadataStats {
+            total_persons,
+            total_aliases,
+            total_albums,
+            total_images,
+            total_tags,
+        }
+    }
 }