Update field type handling in data processing and configuration. Added support for multiple column types in table creation, enhanced datetime processing, and improved UI for field type selection. Updated configuration timestamp.

app/database.py

@@ -245,10 +245,37 @@ class DatabaseManager:
         
         return total_inserted
     
-    def create_table_from_columns(self, table_name: str, columns: List[str]):
-        """根据列名创建表（所有列都是 VARCHAR(255)）"""
-        column_defs = ', '.join([f'`{col}` VARCHAR(255)' for col in columns])
-        sql = f"CREATE TABLE IF NOT EXISTS `{table_name}` ({column_defs}) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4"
+    # 字段类型到 MySQL 类型的映射
+    TYPE_MAPPING = {
+        'string': 'VARCHAR(255)',
+        'datetime': 'DATETIME',
+        'int': 'INT',
+        'float': 'DOUBLE',
+        'text': 'TEXT',
+    }
+    
+    def create_table_from_columns(self, table_name: str, columns: List[str], 
+                                   column_types: Optional[Dict[str, str]] = None):
+        """
+        根据列名和类型创建表
+        
+        Args:
+            table_name: 表名
+            columns: 列名列表
+            column_types: 列名到类型的映射 {列名: 类型}，类型可选: string, datetime, int, float, text
+        """
+        column_defs = []
+        for col in columns:
+            # 获取类型，默认为 string
+            col_type = 'string'
+            if column_types and col in column_types:
+                col_type = column_types[col]
+            
+            # 转换为 MySQL 类型
+            mysql_type = self.TYPE_MAPPING.get(col_type, 'VARCHAR(255)')
+            column_defs.append(f'`{col}` {mysql_type}')
+        
+        sql = f"CREATE TABLE IF NOT EXISTS `{table_name}` ({', '.join(column_defs)}) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4"
         
         with self.get_connection() as conn:
             with conn.cursor() as cursor: