feat: 添加多个字体图标、样式文件和配置文件

新增了多个字体图标文件（SVG格式），包括品牌图标和常规图标。添加了相关的样式文件（LESS和SCSS）用于管理图标样式。更新了配置文件如.gitignore、composer.json和.htaccess等。新增了开发者相关的PHP文件如logout.php。添加了项目规则文档和字体相关的样式文件。

admin/deleteapp.php

@@ -0,0 +1,41 @@
+<?php
+require_once '../config.php';
+
+session_start();
+// 检查管理员登录状态
+if (!isset($_SESSION['admin'])) {
+    header('Location: login.php');
+    exit;
+}
+
+// 验证App ID
+if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
+    header('Location: index.php?error=无效的App ID');
+    exit;
+}
+$appId = $_GET['id'];
+
+// 删除App
+$deleteAppSql = "DELETE FROM apps WHERE id = ?";
+$stmt = $conn->prepare($deleteAppSql);
+$stmt->bind_param("i", $appId);
+
+if ($stmt->execute() === TRUE) {
+    // 删除关联的图片
+    $deleteImagesSql = "DELETE FROM app_images WHERE app_id = ?";
+    $imgStmt = $conn->prepare($deleteImagesSql);
+    $imgStmt->bind_param("i", $appId);
+    $imgStmt->execute();
+
+    // 删除关联的版本
+    $deleteVersionsSql = "DELETE FROM app_versions WHERE app_id = ?";
+    $verStmt = $conn->prepare($deleteVersionsSql);
+    $verStmt->bind_param("i", $appId);
+    $verStmt->execute();
+
+    header('Location: index.php?success=App 删除成功');
+} else {
+    header('Location: index.php?error=App 删除失败: '. $conn->error);
+}
+exit;
+?>