体验升级：路径记忆、可视化深度扫描、文件名汉化

src/gui/components/custom_widgets.py

@@ -12,6 +12,67 @@ from PyQt5.QtWidgets import (
 from PyQt5.QtCore import Qt
 
 
+class DirSelectWidget(QWidget):
+    """目录选择组件"""
+    def __init__(self, label_text, parent=None):
+        """
+        初始化目录选择组件
+
+        Args:
+            label_text: 标签文本
+            parent: 父控件
+        """
+        super().__init__(parent)
+        self.init_ui(label_text)
+
+    def init_ui(self, label_text):
+        layout = QHBoxLayout()
+        layout.setContentsMargins(0, 0, 0, 0)
+
+        self.label = QLabel(label_text)
+        self.label.setMinimumWidth(120)
+        self.line_edit = QLineEdit()
+        self.line_edit.setPlaceholderText("请选择目录...")
+        self.browse_btn = QPushButton("浏览...")
+        self.browse_btn.setMaximumWidth(80)
+        self.browse_btn.clicked.connect(self.browse_dir)
+
+        layout.addWidget(self.label)
+        layout.addWidget(self.line_edit, 1)
+        layout.addWidget(self.browse_btn)
+
+        self.setLayout(layout)
+
+    def browse_dir(self):
+        """浏览目录 - 智能记忆上次选择位置"""
+        current_text = self.line_edit.text().strip()
+        initial_dir = ""
+
+        # 最高优先级：输入框已有路径存在
+        if current_text:
+            if os.path.isdir(current_text):
+                initial_dir = current_text
+            else:
+                dir_path = os.path.dirname(current_text)
+                if dir_path and os.path.exists(dir_path):
+                    initial_dir = dir_path
+
+        # 调用目录选择对话框
+        dir_path = QFileDialog.getExistingDirectory(
+            self, "选择目录", initial_dir
+        )
+        if dir_path:
+            self.line_edit.setText(dir_path)
+
+    def get_path(self):
+        """获取路径"""
+        return self.line_edit.text()
+
+    def set_path(self, path):
+        """设置路径"""
+        self.line_edit.setText(str(path))
+
+
 class FileSelectWidget(QWidget):
     """文件选择组件"""
     def __init__(self, label_text, file_filter="All Files (*.*)", mode="open", parent=None):
@@ -49,14 +110,18 @@ class FileSelectWidget(QWidget):
         self.setLayout(layout)
 
     def browse_file(self):
-        """浏览文件"""
+        """浏览文件 - 智能记忆上次选择位置"""
         current_text = self.line_edit.text().strip()
         initial_dir = ""
 
+        # 最高优先级：输入框已有路径存在
         if current_text:
-            dir_path = os.path.dirname(current_text)
-            if dir_path and os.path.exists(dir_path):
-                initial_dir = dir_path
+            if os.path.isdir(current_text):
+                initial_dir = current_text
+            else:
+                dir_path = os.path.dirname(current_text)
+                if dir_path and os.path.exists(dir_path):
+                    initial_dir = dir_path
 
         if self.mode == "save":
             file_path, _ = QFileDialog.getSaveFileName(