Update docs and code comments to use 'app' terminology

Replaced occurrences of 'application' with 'app' in code comments and documentation for consistency and brevity. Updated both English and Chinese README files to add and clarify DeepLX App usage instructions, and adjusted section order for better clarity.

README.md

@@ -204,12 +204,17 @@ except Exception as e:
 
 Configure API clients to use the pre-deployed instance:
 
-### [Immersive Translate](https://immersivetranslate.com/) (Closed-source browser extension)
+### [DeepLX App](https://github.com/xixu-me/DeepLX-App) (Open-source web app)
 
-1. [Install Immersive Translate](https://immersivetranslate.com/download/)
+A modern, free web-based translation app powered by DeepLX API. Features include:
-2. Go to developer settings and enable beta testing features
+
-3. Go to translation services and add custom translation service DeepLX, set API URL to: `https://dplx.xi-xu.me/translate`
+- Multi-language auto-detection support
-4. Set the maximum requests per second and the maximum text length per request to appropriate values (e.g., `80` and `5000`) to ensure stability and performance
+- Real-time translation as you type
+- Translation history and language switching
+- Responsive design for all devices
+- RTL language support
+
+**Live Demo**: [https://deeplx.xi-xu.me](https://deeplx.xi-xu.me)
 
 ### [Pot](https://github.com/pot-app/pot-desktop/blob/master/README_EN.md) (Open-source cross-platform Windows, macOS and Linux app)
 
@@ -217,6 +222,13 @@ Configure API clients to use the pre-deployed instance:
 2. Open Pot settings and navigate to service settings
 3. Configure DeepL service type as DeepLX and set custom URL to: `https://dplx.xi-xu.me/translate`
 
+### [Immersive Translate](https://immersivetranslate.com/) (Closed-source browser extension)
+
+1. [Install Immersive Translate](https://immersivetranslate.com/download/)
+2. Go to developer settings and enable beta testing features
+3. Go to translation services and add custom translation service DeepLX, set API URL to: `https://dplx.xi-xu.me/translate`
+4. Set the maximum requests per second and the maximum text length per request to appropriate values (e.g., `80` and `5000`) to ensure stability and performance
+
 ### [Bob](https://bobtranslate.com/) (Closed-source macOS app)
 
 1. [Download and install Bob from Mac App Store](https://apps.apple.com/app/id1630034110)

README.zh.md

@@ -204,12 +204,17 @@ except Exception as e:
 
 配置 API 客户端以使用预部署实例：
 
-### [沉浸式翻译](https://immersivetranslate.com/zh-Hans/)（闭源浏览器扩展）
+### [DeepLX App](https://github.com/xixu-me/DeepLX-App)（开源 web 应用）
 
-1. [安装沉浸式翻译](https://immersivetranslate.com/zh-Hans/download/)
+一个现代化、免费的基于 web 的翻译应用，由 DeepLX API 驱动。功能包括：
-2. 进入开发者设置并开启 beta 测试特性
+
-3. 进入翻译服务添加自定义翻译服务 DeepLX，将 API URL 设置为：`https://dplx.xi-xu.me/translate`
+- 支持多语言自动检测
-4. 将每秒最大请求数和每次请求最大文本长度设置为合适的值（例如 `80` 和 `5000`），以确保稳定性和性能
+- 输入时自动翻译
+- 翻译历史和语言切换
+- 适配所有设备的响应式设计
+- RTL 语言支持
+
+**在线演示**：[https://deeplx.xi-xu.me](https://deeplx.xi-xu.me)
 
 ### [Pot](https://github.com/pot-app/pot-desktop)（开源跨平台 Windows、macOS 和 Linux 应用）
 
@@ -217,6 +222,13 @@ except Exception as e:
 2. 打开 Pot 设置并导航到服务设置
 3. 将 DeepL 服务类型配置为 DeepLX，并将自定义 URL 设置为：`https://dplx.xi-xu.me/translate`
 
+### [沉浸式翻译](https://immersivetranslate.com/zh-Hans/)（闭源浏览器扩展）
+
+1. [安装沉浸式翻译](https://immersivetranslate.com/zh-Hans/download/)
+2. 进入开发者设置并开启 beta 测试特性
+3. 进入翻译服务添加自定义翻译服务 DeepLX，将 API URL 设置为：`https://dplx.xi-xu.me/translate`
+4. 将每秒最大请求数和每次请求最大文本长度设置为合适的值（例如 `80` 和 `5000`），以确保稳定性和性能
+
 ### [Bob](https://bobtranslate.com/)（闭源 macOS 应用）
 
 1. [从 Mac App Store 下载并安装 Bob](https://apps.apple.com/cn/app/id1630034110)

src/index.ts

@@ -22,7 +22,7 @@ import {
 import { createStandardResponse } from "./lib/types";
 
 /**
- * Initialize Hono application with environment bindings
+ * Initialize Hono app with environment bindings
  */
 const app = new Hono<{ Bindings: Env }>();
 

src/lib/config.ts

@@ -1,5 +1,5 @@
 /**
- * Configuration constants for the DeepLX application
+ * Configuration constants for the DeepLX app
  * Centralizes all configuration values for easy maintenance and consistency
  */
 

src/lib/const.ts

@@ -1,5 +1,5 @@
 /**
- * Application constants for DeepLX translation service
+ * App constants for DeepLX translation service
  * Contains API endpoints, language definitions, and other immutable values
  */
 

src/lib/errorHandler.ts

@@ -127,7 +127,7 @@ export function logError(
 
 /**
  * Create standardized error response for API endpoints
- * Provides consistent error response format across the application
+ * Provides consistent error response format across the app
  * @param error The error that occurred
  * @param context Optional context about where the error occurred
  * @returns Object containing the response data and HTTP status code

tests/index.test.ts

@@ -1,8 +1,8 @@
 /**
- * Tests for main application endpoints
+ * Tests for main app endpoints
  */
 
-// Mock the main application
+// Mock the main app
 jest.mock("../src/lib", () => ({
   clearMemoryCache: jest.fn(),
   generateCacheKey: jest.fn().mockReturnValue("cache:test-key"),
@@ -29,7 +29,7 @@ jest.mock("../src/lib/performance", () => ({
     .mockReturnValue({ requests: 100, avgResponseTime: 250 }),
 }));
 
-describe("Main Application", () => {
+describe("Main App", () => {
   let app: any;
   let mockEnv: Env;