diff --git a/Makefile b/Makefile
index 870ecc1..4b160c3 100644
--- a/Makefile
+++ b/Makefile
@@ -18,9 +18,9 @@ CFLAGS = -Wall -O2 -I$(INCLUDE_DIR) -I$(LOCAL_INCLUDE_DIR) -D_WIN32 -DUNICODE -D
 LDFLAGS = -L$(LIB_DIR) -liup -liupcd -lgdi32 -lcomdlg32 -lcomctl32 -luuid -lole32 -ladvapi32 -mwindows
 
 # Source
-SRC = src/main.c src/utils.c src/registry.c src/callbacks.c
+SRC = src/main.c src/utils.c src/registry.c src/callbacks.c src/ui.c
 RES = ico/resources.rc
-OBJ = $(OBJ_DIR)/main.o $(OBJ_DIR)/utils.o $(OBJ_DIR)/registry.o $(OBJ_DIR)/callbacks.o $(OBJ_DIR)/resources.o
+OBJ = $(OBJ_DIR)/main.o $(OBJ_DIR)/utils.o $(OBJ_DIR)/registry.o $(OBJ_DIR)/callbacks.o $(OBJ_DIR)/ui.o $(OBJ_DIR)/resources.o
 EXE = $(BIN_DIR)/PathEditor.exe
 
 all: $(BIN_DIR) $(OBJ_DIR) $(EXE)
@@ -46,6 +46,9 @@ $(OBJ_DIR)/registry.o: src/registry.c
 $(OBJ_DIR)/callbacks.o: src/callbacks.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
+$(OBJ_DIR)/ui.o: src/ui.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
 $(OBJ_DIR)/resources.o: ico/resources.rc
 	$(WINDRES) -i $< -o $@
 
diff --git a/README.md b/README.md
index 48e8c1a..f97f6f9 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,36 @@
 # Path Editor (系统环境变量编辑器)
 
-一个简单、轻量级的 Windows 系统环境变量（PATH）编辑器，基于 C 语言和 IUP 图形库开发。
+一个简单、轻量级但功能强大的 Windows 系统环境变量（PATH）编辑器，基于 C 语言和 IUP 图形库开发。
 
 ## ✨ 功能特点
 
-* **可视化编辑**：直观地查看和管理系统 PATH 环境变量。
-* **安全操作**：必须以管理员身份运行才能保存更改，防止误操作。
+* **🛡️ 安全第一**：
+  * **自动备份**：每次保存前自动备份注册表，防止意外。
+  * **只读模式**：非管理员运行时自动切换到只读模式，防止误操作。
+  * **权限检测**：智能检测当前运行权限。
+
+* **📑 双视图管理**：
+  * 完美支持 **System (系统变量)** 和 **User (用户变量)** 的分离查看与编辑。
+  * 清晰的 Tab 标签页切换。
+
+* **🔴 智能诊断与维护**：
+  * **无效路径高亮**：自动检测路径是否存在，不存在的显示为红色。
+  * **重复路径高亮**：自动检测重复项，重复的显示为橙色。
+  * **一键清理**：智能移除所有无效和重复的路径，保持环境整洁。
+
+* **📂 高效交互**：
+  * **拖拽支持**：直接将文件夹拖入窗口即可添加（支持管理员模式下的 UIPI 穿透）。
+  * **实时搜索**：顶部搜索框支持不区分大小写的实时过滤查找。
+  * **快捷键**：支持 Delete 键快速删除选中项。
+
 * **便捷管理**：
   * ➕ **新建**：添加新路径到列表。
   * 📂 **浏览**：直接从文件资源管理器选择目录添加。
-  * ✏️ **编辑**：修改现有路径。
+  * ✏️ **编辑**：双击或点击按钮修改现有路径。
   * 🗑️ **删除**：移除不需要的路径。
   * ⬆️⬇️ **排序**：上移/下移调整路径优先级。
-* **轻量级**：原生 C 语言编写，运行速度快，占用资源少。
+
+* **轻量级**：原生 C 语言编写，无臃肿依赖，运行速度极快。
 
 ## 📦 下载与安装
 
@@ -30,6 +48,7 @@
 * GCC 编译器 (推荐 MinGW-w64)
 * Make 工具
 * IUP 库 (已包含在 `libs` 目录下)
+* Inno Setup 6 (仅打包需要)
 
 ### 编译步骤
 
@@ -54,16 +73,22 @@
 本项目使用 Inno Setup 生成安装包。
 
 1. 确保已安装 [Inno Setup 6](https://jrsoftware.org/isdl.php)。
-2. 编译项目生成 exe 文件。
-3. 使用 Inno Setup 编译 `dist/installer.iss` 脚本。
+2. 运行根目录下的 `build_installer.bat` 脚本。
+3. 生成的安装包将位于 `dist/dist/PathEditorSetup.exe`。
 
 ## 📝 使用说明
 
 1. **启动**：右键点击程序图标，选择“以管理员身份运行”。
 2. **查看**：程序启动后会自动加载当前的系统 PATH 变量。
-3. **修改**：使用右侧按钮栏进行添加、删除、移动等操作。
-4. **保存**：操作完成后，务必点击底部的【确定】按钮保存更改。
-5. **生效**：保存后，某些正在运行的程序可能需要重启才能识别新的环境变量。CMD 或 PowerShell 窗口需要重新打开。
+   * **红色**条目表示路径不存在。
+   * **橙色**条目表示路径重复。
+3. **搜索**：在顶部输入关键词可快速筛选。
+4. **修改**：
+   * 拖拽文件夹到列表可直接添加。
+   * 使用右侧按钮栏进行常规操作。
+   * 点击“一键清理”可自动删除无效和重复项。
+5. **保存**：操作完成后，务必点击底部的【确定】按钮保存更改。
+6. **生效**：保存后，某些正在运行的程序可能需要重启才能识别新的环境变量。CMD 或 PowerShell 窗口需要重新打开。
 
 ## 👤 作者信息
 
diff --git a/bin/PathEditor.exe b/bin/PathEditor.exe
index da67560..0bce9f1 100644
Binary files a/bin/PathEditor.exe and b/bin/PathEditor.exe differ
diff --git a/bin/records/backup_20260316_193937.reg b/bin/records/backup_20260316_193937.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_193937.reg and /dev/null differ
diff --git a/bin/records/backup_20260316_194700.reg b/bin/records/backup_20260316_194700.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_194700.reg and /dev/null differ
diff --git a/bin/records/backup_20260316_195033.reg b/bin/records/backup_20260316_195033.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_195033.reg and /dev/null differ
diff --git a/bin/records/backup_20260316_195233.reg b/bin/records/backup_20260316_195233.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_195233.reg and /dev/null differ
diff --git a/bin/records/backup_20260316_195238.reg b/bin/records/backup_20260316_195238.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_195238.reg and /dev/null differ
diff --git a/bin/records/backup_20260316_195622.reg b/bin/records/backup_20260316_195622.reg
deleted file mode 100644
index 02da0a9..0000000
Binary files a/bin/records/backup_20260316_195622.reg and /dev/null differ
diff --git a/build_installer.bat b/build_installer.bat
new file mode 100644
index 0000000..240ea14
--- /dev/null
+++ b/build_installer.bat
@@ -0,0 +1,15 @@
+@echo off
+echo Copying DLLs...
+if not exist bin mkdir bin
+copy /Y "libs\iup-3.31_Win64_dllw6_lib\*.dll" bin\
+
+echo Building Installer...
+"D:\Program Files (x86)\Inno Setup 6\ISCC.exe" "dist\installer.iss"
+
+if %ERRORLEVEL% NEQ 0 (
+    echo Installer build failed!
+    exit /b %ERRORLEVEL%
+)
+
+echo Done! Installer is in dist\dist\
+pause
\ No newline at end of file
diff --git a/include/ui.h b/include/ui.h
new file mode 100644
index 0000000..e894714
--- /dev/null
+++ b/include/ui.h
@@ -0,0 +1,15 @@
+#ifndef UI_H
+#define UI_H
+
+#include <iup.h>
+
+// 创建列表控件
+Ihandle *create_path_list();
+
+// 创建右侧功能按钮区域
+Ihandle *create_main_buttons();
+
+// 创建底部按钮区域
+Ihandle *create_bottom_buttons();
+
+#endif // UI_H
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index fa1afbf..b72ff57 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,33 +7,27 @@
 #include "utils.h"
 #include "registry.h"
 #include "callbacks.h"
+#include "ui.h"
+
+// 定义 Windows 消息常量
+#ifndef WM_COPYGLOBALDATA
+#define WM_COPYGLOBALDATA 0x0049
+#endif
+
+#ifndef MSGFLT_ADD
+#define MSGFLT_ADD 1
+#endif
 
 // 全局变量定义
 StringList raw_sys_paths = {0};
 StringList raw_user_paths = {0};
 
 // 全局控件定义
-Ihandle *dlg, *tabs_main, *list_sys, *list_user, *lbl_status;   // 主窗口、标签页、系统路径列表、用户路径列表、状态标签
+Ihandle *dlg, *tabs_main, *list_sys, *list_user, *lbl_status;           // 主窗口、标签页、系统路径列表、用户路径列表、状态标签
 Ihandle *btn_new, *btn_edit, *btn_browse, *btn_del, *btn_up, *btn_down; // 右侧按钮
-Ihandle *btn_ok, *btn_cancel, *btn_help; // 确认取消帮助按钮
-Ihandle *btn_clean;     // 一键清理按钮
-Ihandle *txt_search;    // 搜索框
-
-// 辅助函数：创建列表控件
-Ihandle *create_path_list()
-{
-    Ihandle *list = IupFlatList();
-    IupSetAttribute(list, "EXPAND", "YES");
-    IupSetAttribute(list, "ITEMPADDING", "5x5");
-    IupSetAttribute(list, "BACKCOLOR", "255 255 255");
-    IupSetAttribute(list, "BORDER", "YES");
-    IupSetAttribute(list, "CANFOCUS", "YES");
-    IupSetAttribute(list, "HLINE", "NO");
-    IupSetCallback(list, "DBLCLICK_CB", (Icallback)list_dblclick_cb);
-    IupSetCallback(list, "DROPFILES_CB", (Icallback)list_dropfiles_cb);
-    IupSetCallback(list, "K_ANY", (Icallback)list_k_any_cb);
-    return list;
-}
+Ihandle *btn_ok, *btn_cancel, *btn_help;                                // 确认取消帮助按钮
+Ihandle *btn_clean;                                                     // 一键清理按钮
+Ihandle *txt_search;                                                    // 搜索框
 
 // 主函数
 int main(int argc, char **argv)
@@ -44,6 +38,24 @@ int main(int argc, char **argv)
     IupOpen(&argc, &argv);
     IupSetGlobal("UTF8MODE", "YES");
 
+    // 在管理员模式下，解决无法拖拽文件到列表框的问题 (UIPI)
+    // 需要加载 User32.dll 获取 ChangeWindowMessageFilter 函数
+    HMODULE hUser32 = LoadLibraryW(L"user32.dll");
+    if (hUser32)
+    {
+        typedef BOOL(WINAPI * ChangeWindowMessageFilterProc)(UINT, DWORD);
+        ChangeWindowMessageFilterProc pChangeWindowMessageFilter =
+            (ChangeWindowMessageFilterProc)GetProcAddress(hUser32, "ChangeWindowMessageFilter");
+
+        if (pChangeWindowMessageFilter)
+        {
+            pChangeWindowMessageFilter(WM_DROPFILES, MSGFLT_ADD);
+            pChangeWindowMessageFilter(WM_COPYDATA, MSGFLT_ADD);
+            pChangeWindowMessageFilter(WM_COPYGLOBALDATA, MSGFLT_ADD);
+        }
+        FreeLibrary(hUser32);
+    }
+
     // 创建两个列表控件
     list_sys = create_path_list();
     list_user = create_path_list();
@@ -63,42 +75,8 @@ int main(int argc, char **argv)
     IupSetAttribute(tabs_main, "TABTITLE1", "用户变量 (User)");
     IupSetAttribute(tabs_main, "TABTYPE", "TOP");
 
-    // 创建右侧按钮
-    btn_new = IupButton("新建(N)", NULL);
-    btn_edit = IupButton("编辑(E)", NULL);
-    btn_browse = IupButton("浏览(B)...", NULL);
-    btn_del = IupButton("删除(D)", NULL);
-    btn_up = IupButton("上移(U)", NULL);
-    btn_down = IupButton("下移(O)", NULL);
-    btn_clean = IupButton("一键清理", NULL);
-
-    // 设置按钮回调
-    IupSetCallback(btn_new, "ACTION", (Icallback)btn_new_cb);
-    IupSetCallback(btn_edit, "ACTION", (Icallback)btn_edit_cb);
-    IupSetCallback(btn_browse, "ACTION", (Icallback)btn_browse_cb);
-    IupSetCallback(btn_del, "ACTION", (Icallback)btn_del_cb);
-    IupSetCallback(btn_up, "ACTION", (Icallback)btn_up_cb);
-    IupSetCallback(btn_down, "ACTION", (Icallback)btn_down_cb);
-    IupSetCallback(btn_clean, "ACTION", (Icallback)btn_clean_cb);
-
-    // 设置按钮大小 (宽度和高度都增加约1/4)
-    IupSetAttribute(btn_new, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_edit, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_browse, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_del, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_up, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_down, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_clean, "RASTERSIZE", "100x32");
-
-    Ihandle *vbox_btns = IupVbox(
-        btn_new, btn_edit, btn_browse, btn_del,
-        IupFill(), // 间隔
-        btn_clean, // 放在上移下移之前，或者最下面，这里放在中间偏下
-        IupFill(),
-        btn_up, btn_down,
-        NULL);
-    IupSetAttribute(vbox_btns, "GAP", "5");
-    IupSetAttribute(vbox_btns, "MARGIN", "0x0");
+    // 创建右侧按钮区域
+    Ihandle *vbox_btns = create_main_buttons();
 
     // 上部布局：Tabs + 按钮
     Ihandle *hbox_main = IupHbox(tabs_main, vbox_btns, NULL);
@@ -109,23 +87,8 @@ int main(int argc, char **argv)
     lbl_status = IupLabel("状态: 就绪");
     IupSetAttribute(lbl_status, "EXPAND", "HORIZONTAL");
 
-    // 底部按钮
-    btn_ok = IupButton("确定", NULL);
-    btn_cancel = IupButton("取消", NULL);
-    btn_help = IupButton("帮助(?)", NULL);
-
-    IupSetCallback(btn_ok, "ACTION", (Icallback)btn_ok_cb);
-    IupSetCallback(btn_cancel, "ACTION", (Icallback)btn_cancel_cb);
-    IupSetCallback(btn_help, "ACTION", (Icallback)btn_help_cb);
-
-    IupSetAttribute(btn_ok, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_cancel, "RASTERSIZE", "100x32");
-    IupSetAttribute(btn_help, "RASTERSIZE", "100x32");
-
-    Ihandle *hbox_bottom = IupHbox(lbl_status, IupFill(), btn_help, btn_ok, btn_cancel, NULL);
-    IupSetAttribute(hbox_bottom, "GAP", "10");
-    IupSetAttribute(hbox_bottom, "MARGIN", "10x10");
-    IupSetAttribute(hbox_bottom, "ALIGNMENT", "ACENTER");
+    // 创建底部按钮区域
+    Ihandle *hbox_bottom = create_bottom_buttons();
 
     // 总体布局
     Ihandle *vbox_all = IupVbox(
diff --git a/src/ui.c b/src/ui.c
new file mode 100644
index 0000000..ddfbe94
--- /dev/null
+++ b/src/ui.c
@@ -0,0 +1,87 @@
+#include "ui.h"
+#include "globals.h"
+#include "callbacks.h"
+#include <stdlib.h>
+
+// 创建列表控件
+Ihandle *create_path_list()
+{
+    Ihandle *list = IupFlatList();
+    IupSetAttribute(list, "EXPAND", "YES");
+    IupSetAttribute(list, "ITEMPADDING", "5x5");
+    IupSetAttribute(list, "BACKCOLOR", "255 255 255");
+    IupSetAttribute(list, "BORDER", "YES");
+    IupSetAttribute(list, "CANFOCUS", "YES");
+    IupSetAttribute(list, "HLINE", "NO");
+    IupSetCallback(list, "DBLCLICK_CB", (Icallback)list_dblclick_cb);
+    IupSetCallback(list, "DROPFILES_CB", (Icallback)list_dropfiles_cb);
+    IupSetCallback(list, "K_ANY", (Icallback)list_k_any_cb);
+    return list;
+}
+
+// 创建右侧功能按钮区域
+Ihandle *create_main_buttons()
+{
+    // 创建右侧按钮
+    btn_new = IupButton("新建(N)", NULL);
+    btn_edit = IupButton("编辑(E)", NULL);
+    btn_browse = IupButton("浏览(B)...", NULL);
+    btn_del = IupButton("删除(D)", NULL);
+    btn_up = IupButton("上移(U)", NULL);
+    btn_down = IupButton("下移(O)", NULL);
+    btn_clean = IupButton("一键清理", NULL);
+
+    // 设置按钮回调
+    IupSetCallback(btn_new, "ACTION", (Icallback)btn_new_cb);
+    IupSetCallback(btn_edit, "ACTION", (Icallback)btn_edit_cb);
+    IupSetCallback(btn_browse, "ACTION", (Icallback)btn_browse_cb);
+    IupSetCallback(btn_del, "ACTION", (Icallback)btn_del_cb);
+    IupSetCallback(btn_up, "ACTION", (Icallback)btn_up_cb);
+    IupSetCallback(btn_down, "ACTION", (Icallback)btn_down_cb);
+    IupSetCallback(btn_clean, "ACTION", (Icallback)btn_clean_cb);
+
+    // 设置按钮大小 (宽度和高度都增加约1/4)
+    IupSetAttribute(btn_new, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_edit, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_browse, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_del, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_up, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_down, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_clean, "RASTERSIZE", "100x32");
+
+    Ihandle *vbox_btns = IupVbox(
+        btn_new, btn_edit, btn_browse, btn_del,
+        IupFill(), // 间隔
+        btn_clean, // 放在上移下移之前，或者最下面，这里放在中间偏下
+        IupFill(),
+        btn_up, btn_down,
+        NULL);
+    IupSetAttribute(vbox_btns, "GAP", "5");
+    IupSetAttribute(vbox_btns, "MARGIN", "0x0");
+    
+    return vbox_btns;
+}
+
+// 创建底部按钮区域
+Ihandle *create_bottom_buttons()
+{
+    // 底部按钮
+    btn_ok = IupButton("确定", NULL);
+    btn_cancel = IupButton("取消", NULL);
+    btn_help = IupButton("帮助(?)", NULL);
+
+    IupSetCallback(btn_ok, "ACTION", (Icallback)btn_ok_cb);
+    IupSetCallback(btn_cancel, "ACTION", (Icallback)btn_cancel_cb);
+    IupSetCallback(btn_help, "ACTION", (Icallback)btn_help_cb);
+
+    IupSetAttribute(btn_ok, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_cancel, "RASTERSIZE", "100x32");
+    IupSetAttribute(btn_help, "RASTERSIZE", "100x32");
+
+    Ihandle *hbox_bottom = IupHbox(lbl_status, IupFill(), btn_help, btn_ok, btn_cancel, NULL);
+    IupSetAttribute(hbox_bottom, "GAP", "10");
+    IupSetAttribute(hbox_bottom, "MARGIN", "10x10");
+    IupSetAttribute(hbox_bottom, "ALIGNMENT", "ACENTER");
+
+    return hbox_bottom;
+}
\ No newline at end of file