chore(doc&fix):Added instructions for using the security button to the documentation and added the blog to the site map.

frontend/app/sitemap.ts

@@ -1,5 +1,6 @@
 import { MetadataRoute } from "next";
 import { supportedLocales } from "@/constants/i18n-config";
+import { getAllPosts } from "@/lib/blog";
 
 export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
   const baseUrl = "https://www.privydrop.app";
@@ -37,5 +38,23 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
     });
   });
 
+  // Add blog posts for each language
+  for (const lang of languages) {
+    try {
+      const posts = await getAllPosts(lang);
+      
+      posts.forEach((post) => {
+        urls.push({
+          url: `${baseUrl}/${lang}/blog/${post.slug}`,
+          lastModified: new Date(post.frontmatter.date),
+          changeFrequency: "monthly",
+          priority: 0.7,
+        });
+      });
+    } catch (error) {
+      console.warn(`Failed to load blog posts for language ${lang}:`, error);
+    }
+  }
+
   return urls;
 }

frontend/content/blog/resumable-transfers-en.mdx

@@ -55,13 +55,25 @@ Before receiving a file, you must click **"Set Save Directory"**. This step is c
 
 Network fluctuations, accidentally closing the tab, your computer going to sleep... when interruptions inevitably happen, stay calm. Your file progress is safe.
 
-**Step 3: Lock in Your Progress (The Key Action)**
+**Step 3: Smart Protection with Double Insurance**
 
-To **lock in and securely save** the file fragments you've already received, you need to **refresh or close the current page**.
+PrivyDrop provides **dual protection mechanisms** for your file transfers:
 
-This is where PrivyDrop's carefully designed **Exit Protection Mechanism** comes into play. Normally, if a page with an active download is suddenly closed, the browser might discard the incomplete temporary file, leading to data loss.
+**Active Protection: Smart "Safe Save" Button**
 
-We've engineered a solution: when you refresh or close the page, PrivyDrop's code intercepts this action. Instead of letting the browser abandon the file, it acts like a responsible archivist, **gracefully closing the disk write stream to finalize and save the data already received**. This action transforms the temporary file into a stable "save point" ready for the next transfer attempt.
+During file transmission, you'll see a green **"Safe Save"** button in the interface. This is our specially designed "lifeboat" feature for dealing with network instability.
+
+- **When it appears**: After selecting a save directory, this button appears whenever files are being transmitted
+- **When to use it**: Network feeling slow? Worried about an imminent disconnection? Need to leave temporarily? Click it anytime
+- **What it does**: Immediately saves received file fragments to disk, preparing for the next resumption attempt
+
+**💡 Pro Tip**: If you don't have time to click the "Safe Save" button, simply closing or refreshing the webpage has the same protective effect! The exit protection mechanism will automatically save your progress.
+
+**Passive Protection: Exit Protection Mechanism**
+
+Beyond the active safe save button, we've designed an **Exit Protection Mechanism**. When you must refresh or close the page, PrivyDrop's code intercepts this action, acting like a responsible archivist to **gracefully close the disk write stream and finalize the data already received**. This transforms the temporary file into a stable "save point" ready for the next transfer attempt.
+
+Normally, if a page with an active download is suddenly closed, the browser might discard the incomplete temporary file, leading to data loss. PrivyDrop ensures your efforts are never wasted.
 
 **Step 4: Seamless Resumption**
 

frontend/content/blog/resumable-transfers-zh.mdx

@@ -48,13 +48,25 @@ status: "published"
 
 网络波动、手滑关闭页面、电脑意外休眠……当中断不可避免地发生时，请保持冷静，你的文件进度是安全的。
 
-**第三步：锁定进度 (关键操作)**
+**第三步：智能保护，双重保险**
 
-为了**锁定并安全保存**已接收的文件片段，你需要**刷新或关闭当前页面**。
+PrivyDrop 为你的文件传输提供了**双重保护机制**：
 
-这里正是 PrivyDrop 精心设计的**退出保护机制 (Exit Protection Mechanism)** 发挥作用的地方。通常情况下，若一个有活跃下载的页面被突然关闭，浏览器可能会直接丢弃未完成的临时文件，导致数据丢失。
+**主动保存：智能"安全保存"按钮**
 
-而我们为此设计了解决方案：当你刷新或关闭页面时，PrivyDrop 的代码会拦截这个行为，它不会任由浏览器放弃文件，而是像一个负责任的档案管理员，**优雅地关闭磁盘写入流，将已经接收的数据进行最终确认和保存**。这个动作，确保了临时文件被转化为一个稳定、可供下次续传的“存档点”。
+当文件正在传输过程中，你会在界面上看到一个绿色的**"安全保存"**按钮。这是我们为应对网络不稳定而特别设计的"救生艇"功能。
+
+- **何时出现**：选择保存目录后，只要有文件正在传输，这个按钮就会出现
+- **何时使用**：感觉网络变慢？担心即将断网？或者需要临时离开？随时点击它
+- **点击效果**：立即将已接收的文件片段安全保存到磁盘，为下次续传做好准备
+
+**💡 小贴士**：如果来不及点击"安全保存"按钮，直接关闭或刷新网页也有同样的保护效果！退出保护机制会自动为你保存进度。
+
+**被动保护：退出保护机制 (Exit Protection Mechanism)**
+
+除了主动的安全保存按钮，我们还设计了**退出保护机制**。当你不得不刷新或关闭页面时，PrivyDrop 的代码会拦截这个行为，像一个负责任的档案管理员，**优雅地关闭磁盘写入流，将已经接收的数据进行最终确认和保存**。这个动作，确保了临时文件被转化为一个稳定、可供下次续传的"存档点"。
+
+通常情况下，若一个有活跃下载的页面被突然关闭，浏览器可能会直接丢弃未完成的临时文件，导致数据丢失。而 PrivyDrop 绝不会让你的努力白费。
 
 **第四步：无缝续传**