🐛 fix(sql-editor): 修复脚本执行拆分与元数据只读提示

- Oracle 匿名块：识别 BEGIN/DECLARE...END 块，避免按内部分号错误拆分
- 执行路径：PL/SQL 块跳过批量写入路径，保持单条语句语义
- SQL 文件：同步修复流式 SQL 文件拆分逻辑
- 查询结果：系统元数据表保持只读但不再弹业务表主键提示
- 测试覆盖：补充前后端拆分、执行和 information_schema 回归用例

internal/app/methods_file_sql_execution_test.go

@@ -322,3 +322,38 @@ func TestStreamSQLFileHandlesSplitTokenBoundaries(t *testing.T) {
 		t.Fatalf("unexpected full-width semicolon statement: %q", statements[2])
 	}
 }
+
+func TestStreamSQLFileKeepsOracleAnonymousBlockTogether(t *testing.T) {
+	input := strings.Join([]string{
+		"BEGIN",
+		"  INSERT INTO tmp_disable_trigger (table_name) VALUES ('t_memcard_reg');",
+		"  UPDATE t_memcard_reg SET CARDLEVEL = 1 WHERE MEMCARDNO = '8032277312';",
+		"  DELETE FROM tmp_disable_trigger WHERE table_name = 't_memcard_reg';",
+		"END;",
+		"SELECT 1 FROM dual;",
+	}, "\n")
+	var statements []string
+
+	count, err := streamSQLFile(&chunkedReader{data: []byte(input), step: 3}, func(index int, stmt string) error {
+		statements = append(statements, stmt)
+		return nil
+	})
+	if err != nil {
+		t.Fatalf("streamSQLFile returned error: %v", err)
+	}
+	if count != 2 || len(statements) != 2 {
+		t.Fatalf("expected 2 statements, got count=%d statements=%#v", count, statements)
+	}
+	if statements[0] != strings.Join([]string{
+		"BEGIN",
+		"  INSERT INTO tmp_disable_trigger (table_name) VALUES ('t_memcard_reg');",
+		"  UPDATE t_memcard_reg SET CARDLEVEL = 1 WHERE MEMCARDNO = '8032277312';",
+		"  DELETE FROM tmp_disable_trigger WHERE table_name = 't_memcard_reg';",
+		"END;",
+	}, "\n") {
+		t.Fatalf("unexpected anonymous block statement: %q", statements[0])
+	}
+	if statements[1] != "SELECT 1 FROM dual" {
+		t.Fatalf("unexpected second statement: %q", statements[1])
+	}
+}