feat: add Production ID input widget and UI configuration

- Add ProductionIdInput widget with placeholder and multi-line support
- Add UIConfig class for font family, font size, and input width settings
- Refactor data extraction tab to use horizontal PanedWindow layout
  - Left panel: Production ID text input (draggable width)
  - Right panel: control panel and log output
- Share Production IDs between data extraction and material validation tabs
- Add UI settings group in settings page (font selection, size, input width)
- For User users: automatically use shared Production IDs, simplified UI
- Apply font settings to input and log widgets
- Use sashpos() to set initial pane width correctly

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

gui/widgets/__init__.py

@@ -6,5 +6,6 @@ GUI 自定义组件模块
 
 from .file_selector import FileSelector
 from .log_text import LogText
+from .production_id_input import ProductionIdInput
 
-__all__ = ['FileSelector', 'LogText']
+__all__ = ['FileSelector', 'LogText', 'ProductionIdInput']