feat: 新增导入导出功能，支持备份和恢复 PATH 配置

- 添加 import_export 模块，实现 JSON 格式的导入导出
- 在界面中添加导入和导出按钮，并配置回调函数
- 更新配置文件，增加相关文本和状态提示
- 在非管理员权限下禁用导入按钮

src/core/import_export.c

@@ -0,0 +1,241 @@
+#include "core/import_export.h"
+#include "utils/os_env.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+// 获取当前日期时间
+static void get_current_datetime(char *buffer, int size)
+{
+    time_t now = time(NULL);
+    struct tm *tm_info = localtime(&now);
+    strftime(buffer, size, "%Y-%m-%d %H:%M:%S", tm_info);
+}
+
+// 转义 JSON 字符串中的特殊字符
+static char *escape_json_string(const char *str)
+{
+    if (!str)
+        return NULL;
+
+    int len = strlen(str);
+    char *result = (char *)malloc(len * 2 + 1);
+    if (!result)
+        return NULL;
+
+    char *p = result;
+    for (int i = 0; i < len; i++)
+    {
+        switch (str[i])
+        {
+        case '\\':
+            *p++ = '\\';
+            *p++ = '\\';
+            break;
+        case '"':
+            *p++ = '\\';
+            *p++ = '"';
+            break;
+        case '\n':
+            *p++ = '\\';
+            *p++ = 'n';
+            break;
+        case '\r':
+            *p++ = '\\';
+            *p++ = 'r';
+            break;
+        case '\t':
+            *p++ = '\\';
+            *p++ = 't';
+            break;
+        default:
+            *p++ = str[i];
+            break;
+        }
+    }
+    *p = '\0';
+    return result;
+}
+
+// 导出 PATH 到 JSON 文件
+int export_paths_to_file(const StringList *list, const char *filepath, int is_system)
+{
+    if (!list || !filepath)
+        return -1;
+
+    FILE *fp = fopen(filepath, "w, ccs=UTF-8");
+    if (!fp)
+        return -1;
+
+    char datetime[64];
+    get_current_datetime(datetime, sizeof(datetime));
+
+    fprintf(fp, "{\n");
+    fprintf(fp, "  \"version\": \"%s\",\n", EXPORT_VERSION);
+    fprintf(fp, "  \"type\": \"%s\",\n", is_system ? "SYSTEM" : "USER");
+    fprintf(fp, "  \"exported\": \"%s\",\n", datetime);
+    fprintf(fp, "  \"paths\": [\n");
+
+    for (int i = 0; i < list->count; i++)
+    {
+        if (list->items[i])
+        {
+            char *escaped = escape_json_string(list->items[i]);
+            if (escaped)
+            {
+                fprintf(fp, "    \"%s\"%s\n", escaped, (i < list->count - 1) ? "," : "");
+                free(escaped);
+            }
+        }
+    }
+
+    fprintf(fp, "  ]\n");
+    fprintf(fp, "}\n");
+
+    fclose(fp);
+    return 0;
+}
+
+// 移除字符串首尾的空格、制表符、换行符和回车符
+static void trim_whitespace(char *str)
+{
+    char *start = str;
+    while (*start == ' ' || *start == '\t')
+        start++;
+
+    char *end = str + strlen(str) - 1;
+    while (end > start && (*end == ' ' || *end == '\t' || *end == '\n' || *end == '\r'))
+        *end-- = '\0';
+
+    if (start != str)
+        memmove(str, start, strlen(start) + 1);
+}
+
+// 检查是否为注释行或空行
+static int is_comment_or_empty(const char *line)
+{
+    while (*line == ' ' || *line == '\t')
+        line++;
+
+    if (*line == '#' || *line == '\0')
+        return 1;
+
+    return 0;
+}
+
+// 检查是否为 JSON 文件
+static int is_json_file(const char *filepath)
+{
+    const char *ext = strrchr(filepath, '.');
+    return ext && strcasecmp(ext, ".json") == 0;
+}
+
+// 从文件导入 PATH
+int import_paths_from_file(const char *filepath, StringList *list)
+{
+    if (!filepath || !list)
+        return -1;
+
+    if (is_json_file(filepath))
+    {
+        FILE *fp = fopen(filepath, "r, ccs=UTF-8");
+        if (!fp)
+            return -1;
+
+        clear_string_list(list);
+
+        char buffer[8192];
+        int in_paths = 0;
+        int depth = 0;
+        int in_string = 0;
+        char path_buffer[4096];
+        int path_len = 0;
+
+        while (fgets(buffer, sizeof(buffer), fp))
+        {
+            char *p = buffer;
+            while (*p)
+            {
+                if (*p == '"' && (p == buffer || *(p - 1) != '\\'))
+                {
+                    in_string = !in_string;
+                }
+                else if (in_string && *p == '\\')
+                {
+                    p++;
+                    if (*p)
+                    {
+                        if (*p == 'n')
+                            *p = '\n';
+                        else if (*p == 'r')
+                            *p = '\r';
+                        else if (*p == 't')
+                            *p = '\t';
+                    }
+                }
+                else if (!in_string)
+                {
+                    if (*p == '{' || *p == '[')
+                        depth++;
+                    else if (*p == '}' || *p == ']')
+                        depth--;
+                    else if (*p == ':')
+                        in_paths = (depth == 1);
+                    else if (in_paths && depth == 2 && *p == '"')
+                    {
+                        path_len = 0;
+                        p++;
+                        while (*p && path_len < (int)sizeof(path_buffer) - 1)
+                        {
+                            if (*p == '"' && *(p - 1) != '\\')
+                                break;
+                            if (*p == '\\' && *(p + 1))
+                            {
+                                p++;
+                                if (*p == 'n')
+                                    *p = '\n';
+                                else if (*p == 'r')
+                                    *p = '\r';
+                                else if (*p == 't')
+                                    *p = '\t';
+                            }
+                            path_buffer[path_len++] = *p++;
+                        }
+                        if (path_len > 0)
+                        {
+                            path_buffer[path_len] = '\0';
+                            add_string_list(list, path_buffer);
+                        }
+                    }
+                }
+                p++;
+            }
+        }
+
+        fclose(fp);
+        return 0;
+    }
+    else
+    {
+        FILE *fp = fopen(filepath, "r, ccs=UTF-8");
+        if (!fp)
+            return -1;
+
+        clear_string_list(list);
+
+        char line[4096];
+        while (fgets(line, sizeof(line), fp))
+        {
+            trim_whitespace(line);
+
+            if (is_comment_or_empty(line))
+                continue;
+
+            add_string_list(list, line);
+        }
+
+        fclose(fp);
+        return 0;
+    }
+}

src/core/lua_config.c

@@ -6,69 +6,116 @@
 #include <stdlib.h>
 #include <string.h>
 
-static lua_State* G_L = NULL;
+static lua_State *G_L = NULL;
 static int G_loaded = 0;
-static const char* G_config_path = "lua/config.lua";
+static const char *G_config_path = "lua/config.lua";
 
-static const char* get_string_default(const char* section, const char* key)
+static const char *get_string_default(const char *section, const char *key)
 {
     if (strcmp(section, "app") == 0)
     {
-        if (strcmp(key, "name") == 0) return "PathEditor";
-        if (strcmp(key, "name_readonly") == 0) return "PathEditor (只读模式)";
+        if (strcmp(key, "name") == 0)
+            return "PathEditor";
+        if (strcmp(key, "name_readonly") == 0)
+            return "PathEditor (只读模式)";
     }
     else if (strcmp(section, "dialog") == 0)
     {
-        if (strcmp(key, "size") == 0) return "800x800";
-        if (strcmp(key, "minsize") == 0) return "800x800";
-        if (strcmp(key, "select_dir") == 0) return "选择目录";
+        if (strcmp(key, "size") == 0)
+            return "800x800";
+        if (strcmp(key, "minsize") == 0)
+            return "800x800";
+        if (strcmp(key, "select_dir") == 0)
+            return "选择目录";
     }
     else if (strcmp(section, "list") == 0)
     {
-        if (strcmp(key, "item_padding") == 0) return "5x5";
-        if (strcmp(key, "backcolor") == 0) return "255 255 255";
+        if (strcmp(key, "item_padding") == 0)
+            return "5x5";
+        if (strcmp(key, "backcolor") == 0)
+            return "255 255 255";
     }
     else if (strcmp(section, "button") == 0)
     {
-        if (strcmp(key, "rastersize") == 0) return "100x32";
-        if (strcmp(key, "new") == 0) return "新建(N)";
-        if (strcmp(key, "edit") == 0) return "编辑(E)";
-        if (strcmp(key, "browse") == 0) return "浏览(B)...";
-        if (strcmp(key, "del") == 0) return "删除(D)";
-        if (strcmp(key, "up") == 0) return "上移(U)";
-        if (strcmp(key, "down") == 0) return "下移(O)";
-        if (strcmp(key, "clean") == 0) return "一键清理";
-        if (strcmp(key, "ok") == 0) return "确定";
-        if (strcmp(key, "cancel") == 0) return "取消";
-        if (strcmp(key, "help") == 0) return "帮助(?)";
+        if (strcmp(key, "rastersize") == 0)
+            return "100x32";
+        if (strcmp(key, "new") == 0)
+            return "新建(N)";
+        if (strcmp(key, "edit") == 0)
+            return "编辑(E)";
+        if (strcmp(key, "browse") == 0)
+            return "浏览(B)...";
+        if (strcmp(key, "del") == 0)
+            return "删除(D)";
+        if (strcmp(key, "up") == 0)
+            return "上移(U)";
+        if (strcmp(key, "down") == 0)
+            return "下移(O)";
+        if (strcmp(key, "clean") == 0)
+            return "一键清理";
+        if (strcmp(key, "import") == 0)
+            return "导入(I)";
+        if (strcmp(key, "export") == 0)
+            return "导出(E)";
+        if (strcmp(key, "ok") == 0)
+            return "确定";
+        if (strcmp(key, "cancel") == 0)
+            return "取消";
+        if (strcmp(key, "help") == 0)
+            return "帮助(?)";
     }
     else if (strcmp(section, "label") == 0)
     {
-        if (strcmp(key, "title") == 0) return "环境变量编辑器:";
-        if (strcmp(key, "search_placeholder") == 0) return "输入关键词搜索...";
-        if (strcmp(key, "tab_sys") == 0) return "系统变量 (System)";
-        if (strcmp(key, "tab_user") == 0) return "用户变量 (User)";
+        if (strcmp(key, "title") == 0)
+            return "环境变量编辑器:";
+        if (strcmp(key, "search_placeholder") == 0)
+            return "输入关键词搜索...";
+        if (strcmp(key, "tab_sys") == 0)
+            return "系统变量 (System)";
+        if (strcmp(key, "tab_user") == 0)
+            return "用户变量 (User)";
+        if (strcmp(key, "export_title") == 0)
+            return "导出 PATH";
+        if (strcmp(key, "import_title") == 0)
+            return "导入 PATH";
     }
     else if (strcmp(section, "layout") == 0)
     {
-        if (strcmp(key, "vbox_gap") == 0) return "5";
-        if (strcmp(key, "vbox_margin") == 0) return "0x0";
-        if (strcmp(key, "vbox_all_margin") == 0) return "10x10";
-        if (strcmp(key, "vbox_all_gap") == 0) return "5";
-        if (strcmp(key, "hbox_gap") == 0) return "10";
-        if (strcmp(key, "hbox_margin") == 0) return "10x10";
-        if (strcmp(key, "hbox_alignment") == 0) return "ACENTER";
+        if (strcmp(key, "vbox_gap") == 0)
+            return "5";
+        if (strcmp(key, "vbox_margin") == 0)
+            return "0x0";
+        if (strcmp(key, "vbox_all_margin") == 0)
+            return "10x10";
+        if (strcmp(key, "vbox_all_gap") == 0)
+            return "5";
+        if (strcmp(key, "hbox_gap") == 0)
+            return "10";
+        if (strcmp(key, "hbox_margin") == 0)
+            return "10x10";
+        if (strcmp(key, "hbox_alignment") == 0)
+            return "ACENTER";
     }
     else if (strcmp(section, "status") == 0)
     {
-        if (strcmp(key, "normal") == 0) return "状态: 就绪";
-        if (strcmp(key, "readonly") == 0) return "状态: ⚠️ 只读模式 (无管理员权限)";
-        if (strcmp(key, "saving") == 0) return "状态: 保存中...";
-        if (strcmp(key, "saved") == 0) return "状态: ✓ 保存成功";
-        if (strcmp(key, "error") == 0) return "状态: ✗ 保存失败";
-        if (strcmp(key, "deleted") == 0) return "状态: 已删除选中项";
-        if (strcmp(key, "loaded") == 0) return "状态: 已加载系统和用户变量";
-        if (strcmp(key, "drag_folder_only") == 0) return "提示: 只能拖拽文件夹添加到 PATH";
+        if (strcmp(key, "normal") == 0)
+            return "状态: 就绪";
+        if (strcmp(key, "readonly") == 0)
+            return "状态: ⚠️ 只读模式 (无管理员权限)";
+        if (strcmp(key, "saving") == 0)
+            return "状态: 保存中...";
+        if (strcmp(key, "saved") == 0)
+            return "状态: ✓ 保存成功";
+        if (strcmp(key, "error") == 0)
+            return "状态: ✗ 保存失败";
+        if (strcmp(key, "deleted") == 0)
+            return "状态: 已删除选中项";
+        if (strcmp(key, "loaded") == 0)
+            return "状态: 已加载系统和用户变量";
+        if (strcmp(key, "drag_folder_only") == 0)
+            return "提示: 只能拖拽文件夹添加到 PATH";
+        if (strcmp(key, "admin_warning") == 0)
+            return "未检测到管理员权限，只能查看和导出 PATH，无法保存更改。";
     }
     return "";
 }
@@ -90,7 +137,7 @@ int lua_config_init(void)
 
     if (luaL_dofile(G_L, G_config_path) != LUA_OK)
     {
-        const char* err = lua_tostring(G_L, -1);
+        const char *err = lua_tostring(G_L, -1);
         if (err)
         {
             fprintf(stderr, "[Lua Config] 加载配置文件失败: %s\n", err);
@@ -115,7 +162,7 @@ void lua_config_destroy(void)
     G_loaded = 0;
 }
 
-const char* lua_config_get_string(const char* section, const char* key)
+const char *lua_config_get_string(const char *section, const char *key)
 {
     if (G_L == NULL || section == NULL || key == NULL)
     {
@@ -143,13 +190,13 @@ const char* lua_config_get_string(const char* section, const char* key)
         return get_string_default(section, key);
     }
 
-    const char* value = lua_tostring(G_L, -1);
+    const char *value = lua_tostring(G_L, -1);
     lua_settop(G_L, 0);
 
     return value ? value : get_string_default(section, key);
 }
 
-int lua_config_get_int(const char* section, const char* key, int default_value)
+int lua_config_get_int(const char *section, const char *key, int default_value)
 {
     if (G_L == NULL || section == NULL || key == NULL)
     {