feat(test): 添加单元测试框架并完善国际化支持

- 新增 CMake 测试框架配置，支持 safe_string、string_ext 和 path_manager 模块的单元测试
- 实现 Windows API Mock 机制，便于测试编码转换函数
- 添加 error_code 模块的字符串表示函数，支持英文错误日志
- 在 UI 回调函数中集成国际化翻译，覆盖新建、编辑、导入导出等操作提示
- 扩展 string_list 功能，新增重复路径检查函数
- 更新翻译文件，同步所有用户界面的中英文文本

src/controller/callbacks_basic.c

@@ -18,11 +18,19 @@ int btn_new_cb(Ihandle *self)
 {
     Ihandle *dlg = IupGetDialog(self);
     char buffer[PATH_BUFFER_SIZE] = "";
-    if (custom_input_dialog("新建环境变量", "请输入路径:", buffer, sizeof(buffer)))
+    if (custom_input_dialog(_("New Environment Variable"), _("Please enter a path:"), buffer, sizeof(buffer)))
     {
         if (strlen(buffer) > 0)
         {
             StringList *raw_data = get_current_raw_data(dlg);
+
+            // 检查是否已存在重复路径
+            if (string_list_contains(raw_data, buffer))
+            {
+                IupMessage(_("Warning"), _("This path already exists and will not be added again."));
+                return IUP_DEFAULT;
+            }
+
             add_string_list(raw_data, buffer);
 
             Ihandle *current_list = get_current_list(dlg);
@@ -51,7 +59,7 @@ int btn_edit_cb(Ihandle *self)
     char buffer[PATH_BUFFER_SIZE];
     safe_strcpy(buffer, sizeof(buffer), string_list_get(raw_data, selected - 1));
 
-    if (custom_input_dialog("编辑环境变量", "编辑路径:", buffer, sizeof(buffer)))
+    if (custom_input_dialog(_("Edit Environment Variable"), _("Edit path:"), buffer, sizeof(buffer)))
     {
         if (strlen(buffer) > 0)
         {
@@ -91,6 +99,15 @@ int btn_browse_cb(Ihandle *self)
         if (value)
         {
             StringList *raw_data = get_current_raw_data(dlg);
+
+            // 检查是否已存在重复路径
+            if (string_list_contains(raw_data, value))
+            {
+                IupMessage(_("Warning"), _("This path already exists and will not be added again."));
+                IupDestroy(filedlg);
+                return IUP_DEFAULT;
+            }
+
             add_string_list(raw_data, value);
 
             Ihandle *current_list = get_current_list(dlg);
@@ -113,7 +130,7 @@ int btn_del_cb(Ihandle *self)
 
     if (selected == 0)
     {
-        IupMessage("提示", "请先选择要删除的项");
+        IupMessage(_("Info"), _("Please select an item to delete first"));
         return IUP_DEFAULT;
     }
 

src/controller/callbacks_io.c

@@ -24,7 +24,7 @@ int btn_import_cb(Ihandle *self)
 
     if (!check_admin())
     {
-        IupMessage("错误", "需要管理员权限才能导入 PATH！");
+        IupMessage(_("Error"), _("Administrator privileges are required to import PATH!"));
         return IUP_DEFAULT;
     }
 
@@ -52,7 +52,7 @@ int btn_import_cb(Ihandle *self)
 
                 if (!has_system && !has_user)
                 {
-                    IupMessage("错误", "文件中没有找到有效的路径！");
+                    IupMessage(_("Error"), _("No valid paths found in file!"));
                     clear_string_list(&imported.system);
                     clear_string_list(&imported.user);
                     IupDestroy(filedlg);
@@ -62,14 +62,14 @@ int btn_import_cb(Ihandle *self)
                 int choice = 0;
                 if (has_system && has_user)
                 {
-                    choice = IupAlarm("导入选项", "请选择导入目标：",
-                                      "仅系统变量", "仅用户变量", "全部导入");
+                    choice = IupAlarm(_("Import Options"), _("Please select import target:"),
+                                      _("System Variables Only"), _("User Variables Only"), _("Import All"));
                 }
                 else if (has_system)
                 {
-                    // TXT 文件导入时，让用户选择目标（系统变量或用户变量）
-                    choice = IupAlarm("导入选项", "请选择导入目标：",
-                                      "导入到系统变量", "导入到用户变量", NULL);
+                    // TXT file import: let user choose target (system or user)
+                    choice = IupAlarm(_("Import Options"), _("Please select import target:"),
+                                      _("Import to System"), _("Import to User"), NULL);
                     // IupAlarm 返回 1 或 2，转换为 1(系统) 或 2(用户)
                 }
                 else
@@ -108,8 +108,8 @@ int btn_import_cb(Ihandle *self)
                 clear_string_list(&imported.user);
 
                 char msg[256];
-                snprintf(msg, sizeof(msg), "成功导入 %d 个路径！", total_imported);
-                IupMessage("导入成功", msg);
+                snprintf(msg, sizeof(msg), _("Successfully imported %d paths!"), total_imported);
+                IupMessage(_("Import Success"), msg);
 
                 Ihandle *lbl_status = IupGetDialogChild(dlg, CTRL_LBL_STATUS);
                 if (lbl_status)
@@ -118,7 +118,7 @@ int btn_import_cb(Ihandle *self)
             else
             {
                 log_error("Import failed: error code %d", import_result);
-                IupMessage("错误", "导入失败，请检查文件格式是否正确！");
+                IupMessage(_("Error"), _("Import failed, please check if the file format is correct!"));
             }
         }
     }
@@ -171,14 +171,14 @@ int btn_export_cb(Ihandle *self)
             if (export_result == ERR_OK)
             {
                 char msg[512];
-                snprintf(msg, sizeof(msg), "成功导出！\n系统变量: %d 个\n用户变量: %d 个\n\n保存位置: %s",
+                snprintf(msg, sizeof(msg), _("Export successful!\nSystem variables: %d\nUser variables: %d\n\nSave location: %s"),
                          data.system.count, data.user.count, filepath);
-                IupMessage("导出成功", msg);
+                IupMessage(_("Export Success"), msg);
             }
             else
             {
                 log_error("Export failed: error code %d", export_result);
-                IupMessage("错误", "导出失败！");
+                IupMessage(_("Error"), _("Export failed!"));
             }
         }
     }

src/controller/callbacks_nav.c

@@ -61,7 +61,7 @@ int btn_clean_cb(Ihandle *self)
     if (!raw_data || raw_data->count == 0)
         return IUP_DEFAULT;
 
-    if (IupAlarm("确认清理", "此操作将移除当前列表中所有【无效路径】和【重复路径】。\n确定要继续吗？", "确定", "取消", NULL) != 1)
+    if (IupAlarm(_("Confirm Cleanup"), _("This operation will remove all 【invalid paths】 and 【duplicate paths】 from the current list.\nAre you sure you want to continue?"), _("Confirm"), _("Cancel"), NULL) != 1)
     {
         return IUP_DEFAULT;
     }
@@ -74,8 +74,8 @@ int btn_clean_cb(Ihandle *self)
     sync_string_list_to_ui(current_list, raw_data);
 
     char msg[128];
-    snprintf(msg, sizeof(msg), "清理完成！共移除了 %d 个无效或重复路径。", removed);
-    IupMessage("提示", msg);
+    snprintf(msg, sizeof(msg), _("Cleanup completed! Removed %d invalid or duplicate paths."), removed);
+    IupMessage(_("Info"), msg);
     return IUP_DEFAULT;
 }
 

src/controller/callbacks_sys.c

@@ -24,7 +24,7 @@ int btn_ok_cb(Ihandle *self)
 
     if (!check_admin())
     {
-        IupMessage("错误", "需要管理员权限才能保存更改！");
+        IupMessage(_("Error"), _("Administrator privileges are required to save changes!"));
         return IUP_DEFAULT;
     }
 
@@ -32,11 +32,11 @@ int btn_ok_cb(Ihandle *self)
     char custom_backup_dir[MAX_PATH] = "";
     int do_backup = 1;  // 是否执行备份
 
-    int backup_choice = IupAlarm("备份设置",
-                                  "是否自定义备份目录？\n\n"
-                                  "选择「使用默认」将备份到 %APPDATA%/PathEditor/backups/\n"
-                                  "选择「自定义目录」可选择其他位置",
-                                  "使用默认", "自定义目录", "跳过备份");
+    int backup_choice = IupAlarm(_("Backup Settings"),
+                                  _("Would you like to customize the backup directory?\n\n"
+                                    "Select 'Use Default' to backup to %%APPDATA%%/PathEditor/backups/\n"
+                                    "Select 'Custom Directory' to choose another location"),
+                                  _("Use Default"), _("Custom Directory"), _("Skip Backup"));
 
     if (backup_choice == 2)  // 自定义目录
     {
@@ -56,13 +56,13 @@ int btn_ok_cb(Ihandle *self)
 
         if (strlen(custom_backup_dir) == 0)
         {
-            IupMessage("提示", "未选择目录，将使用默认备份路径。");
+            IupMessage(_("Hint"), _("No directory selected, will use default backup path."));
         }
     }
     else if (backup_choice == 3)  // 跳过备份
     {
-        int skip_confirm = IupAlarm("确认", "确定跳过备份吗？\n跳过备份可能导致无法恢复！",
-                                    "确定跳过", "返回备份", NULL);
+        int skip_confirm = IupAlarm(_("Confirm"), _("Are you sure you want to skip backup?\nSkipping backup may cause inability to recover!"),
+                                    _("Skip Anyway"), _("Go Back"), NULL);
         if (skip_confirm != 1)
         {
             // 用户反悔，重新询问
@@ -89,7 +89,7 @@ int btn_ok_cb(Ihandle *self)
 
             char msg[512];
             snprintf(msg, sizeof(msg), "备份失败！原因：%s\n\n是否继续保存？\n（继续保存可能导致无法恢复）", reason);
-            int choice = IupAlarm("警告", msg, "继续保存", "取消", NULL);
+            int choice = IupAlarm(_("Warning"), msg, _("Continue Saving"), _("Cancel"), NULL);
             if (choice != 1)
                 return IUP_DEFAULT;
         }
@@ -104,22 +104,22 @@ int btn_ok_cb(Ihandle *self)
     {
         log_info("Saved system paths: %d, user paths: %d", ctx->sys_paths.count, ctx->user_paths.count);
         SendMessageTimeoutW(HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM)L"Environment", SMTO_ABORTIFHUNG, 5000, NULL);
-        IupMessage("成功", "系统和用户 PATH 环境变量均已更新！");
+        IupMessage(_("Success"), _("Both system and user PATH environment variables have been updated!"));
         if (lbl_status)
             IupSetAttribute(lbl_status, "TITLE", lua_config_get_string("status", "saved"));
     }
     else if (sys_ok == ERR_OK)
     {
-        IupMessage("提示", "系统变量保存成功，但用户变量保存失败。");
+        IupMessage(_("Info"), _("System variables saved successfully, but user variables failed to save."));
     }
     else if (user_ok == ERR_OK)
     {
-        IupMessage("提示", "用户变量保存成功，但系统变量保存失败。");
+        IupMessage(_("Info"), _("User variables saved successfully, but system variables failed to save."));
     }
     else
     {
         log_error("Failed to save paths: sys=%d, user=%d", sys_ok, user_ok);
-        IupMessage("错误", "保存失败！");
+        IupMessage(_("Error"), _("Failed to save!"));
         if (lbl_status)
             IupSetAttribute(lbl_status, "TITLE", lua_config_get_string("status", "error"));
     }
@@ -146,7 +146,7 @@ void load_all_paths(void)
     if (load_system_paths(&ctx->sys_paths) != ERR_OK)
     {
         log_error("Failed to load system paths");
-        IupMessage("错误", "无法打开系统环境变量注册表键，请尝试以管理员身份运行。");
+        IupMessage(_("Error"), _("Unable to open system environment variable registry key, please try running as administrator."));
     }
     else
     {
@@ -182,23 +182,23 @@ int btn_lang_cb(Ihandle *self)
 // 按钮回调：帮助
 int btn_help_cb(Ihandle *self)
 {
-    IupMessage("使用说明",
-               "1. 本程序用于编辑系统环境变量 PATH。\n"
-               "2. 必须以【管理员身份】运行才能保存更改。\n"
-               "3. 操作说明：\n"
-               "   - 新建：添加新路径到列表末尾。\n"
-               "   - 编辑：修改选中的路径。\n"
-               "   - 浏览：从文件系统选择目录添加。\n"
-               "   - 删除：移除选中的路径。\n"
-               "   - 上移/下移：调整路径优先级。\n"
-               "   - 导入/导出：备份和恢复 PATH 配置。\n"
-               "4. 点击【确定】保存更改并生效。\n"
-               "5. 注意：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。\n\n"
-               "--------------------------------------------------\n"
-               "作者：LHY\n"
-               "邮箱：3364451258@qq.com\n"
-               "GitHub：https://github.com/LHY0125/PathEditor\n"
-               "记得给我的项目点个star！");
+    IupMessage(_("Usage Instructions"),
+               _("1. This program is used to edit system environment variable PATH.\n"
+                 "2. Must run as 【Administrator】 to save changes.\n"
+                 "3. Operations:\n"
+                 "   - New: Add new path to end of list.\n"
+                 "   - Edit: Modify selected path.\n"
+                 "   - Browse: Select directory from file system to add.\n"
+                 "   - Delete: Remove selected path.\n"
+                 "   - Up/Down: Adjust path priority.\n"
+                 "   - Import/Export: Backup and restore PATH configuration.\n"
+                 "4. Click 【OK】 to save changes and apply.\n"
+                 "5. Note: Some running programs may need to restart to recognize new environment variables.\n\n"
+                 "--------------------------------------------------\n"
+                 "Author: LHY\n"
+                 "Email: 3364451258@qq.com\n"
+                 "GitHub: https://github.com/LHY0125/PathEditor\n"
+                 "Don't forget to star my project!"));
 
     return IUP_DEFAULT;
 }

src/utils/error_code.c

@@ -0,0 +1,40 @@
+#include "utils/error_code.h"
+#include <string.h>
+
+const char* error_code_to_string(ErrorCode code)
+{
+    switch (code)
+    {
+        case ERR_OK:
+            return "Success";
+        case ERR_FAILED:
+            return "Operation failed";
+        case ERR_NULL_PTR:
+            return "Null pointer error";
+        case ERR_OUT_OF_MEMORY:
+            return "Out of memory";
+        case ERR_FILE_NOT_FOUND:
+            return "File not found";
+        case ERR_PERMISSION_DENIED:
+            return "Permission denied";
+        case ERR_INVALID_FORMAT:
+            return "Invalid format";
+        case ERR_REGISTRY_FAILED:
+            return "Registry operation failed";
+        case ERR_NOT_FOUND:
+            return "Item not found";
+        case ERR_EXISTS:
+            return "Item already exists";
+        case ERR_INVALID_INDEX:
+            return "Invalid index";
+        default:
+            return "Unknown error";
+    }
+}
+
+// 注意：error_code_to_message 需要链接 intl 库，
+// 如果不需要在错误码模块使用国际化，可以直接使用 error_code_to_string
+const char* error_code_to_message(ErrorCode code)
+{
+    return error_code_to_string(code);
+}

src/utils/string_ext.c

@@ -126,4 +126,17 @@ void clear_string_list(StringList *list)
     list->items = NULL;
     list->count = 0;
     list->capacity = 0;
+}
+
+// 检查字符串列表中是否存在指定路径（不区分大小写）
+int string_list_contains(const StringList *list, const char *str)
+{
+    if (!list || !str)
+        return 0;
+    for (int i = 0; i < list->count; i++)
+    {
+        if (list->items[i] && _stricmp(list->items[i], str) == 0)
+            return 1;
+    }
+    return 0;
 }