style: format all Python files with Black

Apply Black formatter to the entire codebase for consistent code style.

Co-Authored-By: Claude (glm-5) <noreply@anthropic.com>

gui/widgets/production_id_input.py

@@ -35,12 +35,14 @@ class ProductionIdInput(ttk.Frame):
             justify="center",
             colors=("black", "#f0f0f0"),
             bg="#f0f0f0",
-            width=3
+            width=3,
         )
         self.line_numbers.pack(fill="both", expand=True)
 
         # 创建滚动条
-        self.scrollbar = ttk.Scrollbar(self, orient=tk.VERTICAL, command=self.text_widget.yview)
+        self.scrollbar = ttk.Scrollbar(
+            self, orient=tk.VERTICAL, command=self.text_widget.yview
+        )
         self.text_widget.configure(yscrollcommand=self._on_scroll)
 
         # 布局：行号 | 文本框 | 滚动条
@@ -74,7 +76,10 @@ class ProductionIdInput(ttk.Frame):
 
     def _on_focus_in(self, event):
         """获得焦点时隐藏占位符"""
-        if not self._updating_placeholder and self.text_widget.get("1.0", "end-1c") == self.placeholder:
+        if (
+            not self._updating_placeholder
+            and self.text_widget.get("1.0", "end-1c") == self.placeholder
+        ):
             self.text_widget.delete("1.0", tk.END)
             # 确保文字颜色为黑色
             self.text_widget.configure(foreground="black")