fix: 解决 CodeRabbit Code Review 提出的逻辑反转与缺省依赖问题 (PR #524)

Author: hect0x7

requirements-dev.txt

@@ -6,4 +6,5 @@ psutil
 pycryptodome
 requests
 plugin_jm_server
-zhconv
+zhconv
+img2pdf

src/jmcomic/jm_option.py

@@ -298,7 +298,7 @@ def construct(cls, origdic: Dict, cover_default=True) -> 'JmOption':
 
         # log
         log = dic.pop('log', True)
-        if not log:
+        if log is False:
             disable_jm_log()
 
         # version

src/jmcomic/jm_plugin.py

@@ -68,7 +68,7 @@ def execute_deletion(self, paths: List[str]):
         删除文件和文件夹
         :param paths: 路径列表
         """
-        if self.delete_original_file:
+        if not self.delete_original_file:
             return
 
         for p in paths: