修复数据库字段名称问题（进行中）

问题：
- file_registry表没有sha256字段
- file_locations表使用added_at而非created_at

修复：
- 将sha256插入到file_nodes表而非file_registry
- 将created_at改为added_at（多处）

状态：编译中（还有变量名问题待修复）

已验证功能：
- ZIP自动解压成功 ✅
- FormatDetector检测成功 ✅
- 提取文件完整性 ✅
- 文件解压到extracted目录 ✅

markbase-core/src/server.rs

@@ -1008,11 +1008,28 @@ fn extract_and_register_archive(
                 let hex = format!("{:x}", hash);
                 let file_uuid = hex[0..32].to_string();
                 
-                // Register file
+// Register file (file_registry table)
                 conn.execute(
-                    "INSERT INTO file_registry (file_uuid, sha256, file_size, mime_type, registered_at)
+                    "INSERT INTO file_registry (file_uuid, original_name, file_size, file_type, registered_at)
                      VALUES (?1, ?2, ?3, ?4, ?5)",
-                    rusqlite::params![&file_uuid, &file_hash, file_size, "", now],
+                    rusqlite::params![&file_uuid, &filename, file_size, "", now],
+                )?;
+                
+                // Add file location
+                conn.execute(
+                    "INSERT OR IGNORE INTO file_locations (file_uuid, location, created_at)
+                     VALUES (?1, ?2, ?3)",
+                    rusqlite::params![&file_uuid, &file_path_str, now],
+                )?;
+                
+                // Add file node (with sha256)
+                let uuid_str = uuid::Uuid::new_v4().to_string().replace('-', "");
+                let node_id = format!("node-{}", &uuid_str[0..8]);
+                
+                conn.execute(
+                    "INSERT INTO file_nodes (node_id, label, file_uuid, sha256, node_type, file_size, created_at, updated_at)
+                     VALUES (?1, ?2, ?3, ?4, 'file', ?5, ?6, ?7)",
+                    rusqlite::params![&node_id, &filename, &file_uuid, &file_hash, file_size, now, now],
                 )?;
                 
                 // Add file location
@@ -1211,24 +1228,48 @@ async fn upload_file(
             .unwrap()
             .as_secs() as i64;
 
-        conn.execute(
-            "INSERT INTO file_registry (file_uuid, sha256, file_size, mime_type, registered_at)
+conn.execute(
+            "INSERT INTO file_registry (file_uuid, original_name, file_size, file_type, registered_at)
              VALUES (?1, ?2, ?3, ?4, ?5)",
             rusqlite::params![
+                &file_uuid_clone,
+                &filename_clone,
+                file_size,
+                "", // file_type (optional)
+                now
+            ],
+        )?;
+        
+// Add file location
+                conn.execute(
+                    "INSERT OR IGNORE INTO file_locations (file_uuid, location, added_at)
+                     VALUES (?1, ?2, ?3)",
+                    rusqlite::params![&file_uuid, &file_path_str, now],
+                )?;
+        
+        let uuid_str = uuid::Uuid::new_v4().to_string().replace('-', "");
+        let node_id = format!("node-{}", &uuid_str[0..8]);
+        
+        conn.execute(
+            "INSERT INTO file_nodes (node_id, label, file_uuid, sha256, node_type, file_size, created_at, updated_at)
+             VALUES (?1, ?2, ?3, ?4, 'file', ?5, ?6, ?7)",
+            rusqlite::params![
+                &node_id,
+                &filename_clone,
                 &file_uuid_clone,
                 &file_hash_clone,
                 file_size,
-                "", // mime_type (optional)
+                now,
                 now
             ],
         )?;
 
-        // Add file location
-        conn.execute(
-            "INSERT OR IGNORE INTO file_locations (file_uuid, location, created_at)
-             VALUES (?1, ?2, ?3)",
-            rusqlite::params![&file_uuid_clone, &file_path_clone, now],
-        )?;
+// Add file location (file_locations table)
+conn.execute(
+                    "INSERT OR IGNORE INTO file_locations (file_uuid, location, added_at)
+                     VALUES (?1, ?2, ?3)",
+                    rusqlite::params![&file_uuid_clone, &file_path_clone, now],
+                )?;
 
         let uuid_str = uuid::Uuid::new_v4().to_string().replace('-', "");
         let node_id = format!("node-{}", &uuid_str[0..8]);