feat: 重构更新流程 — 无更新不抛异常、用户决定下载、更新详情展示（md文件中的）

【核心重构】
  - getLatestVersion() 不再 throw Error，无更新时返回 { version: APP_VERSION }
  - checkForUpdates() 先自行预检 → 无更新直发 IPC，有更新才交 electron-updater
  - 移除 NO_UPDATE_MESSAGE 常量及所有字符串匹配拦截代码
  - HeiXiuProvider 增加 500ms TTL 缓存，避免预检+electron-updater 重复请求 API

  【用户体验】
  - 检查到新版本后不再自动下载，展示更新内容供用户决定
  - 新增"下载更新"按钮（与"安装更新"分离为两步操作）
  - 设置页新增"查看详情"弹窗，Markdown 格式化渲染更新日志
  - available / downloading / downloaded 三个状态 UI 独立展示

  【Bug 修复】
  - 测试服务器版本排序：字符串序 → 语义版本序（_version_key），0.0.10 正确 > 0.0.9
  - 版本比较：!= → <（_version_key），防止高版本误判为有更新
  - get_best_release fallback 同样改为语义版本排序
  - Windows cmd set 命令尾部空格 → Invalid URL（.trim() 修复）
  - electron-updater 'error' 事件中拦截 NO_UPDATE_MESSAGE → UPDATE_NOT_AVAILABLE

  【文档更新】
  - CHANGELOG.md、PROJECT.md、UpdateA.md 同步更新架构图和流程说明

scripts/upload-oss.mjs

@@ -1,5 +1,5 @@
 // ============================================================
-// 上传安装包到阿里云 OSS
+// 上传安装包 + blockmap 文件到阿里云 OSS
 //
 // 用法：
 //   node scripts/upload-oss.mjs <platform> <edition> [version]
@@ -54,7 +54,10 @@ try {
     const all = readdirSync(releaseDir);
     const exts = platform === 'win32' ? ['.exe'] : platform === 'darwin' ? ['.dmg'] : ['.AppImage'];
     installerName = all.find((f) => exts.some((e) => f.endsWith(e)));
-    if (!installerName) console.error(`错误: ${releaseDir} — 未找到安装包`);
+    if (!installerName) {
+        console.error(`错误: ${releaseDir} — 未找到安装包`);
+        process.exit(1);
+    }
 } catch (err) {
     console.error(`错误: ${releaseDir} — ${err.message}`);
     process.exit(1);
@@ -62,6 +65,20 @@ try {
 
 const installerPath = join(releaseDir, installerName);
 
+// ---------- 查找 blockmap 文件 ----------
+
+let blockmapName = null;
+let blockmapPath = null;
+try {
+    const all = readdirSync(releaseDir);
+    blockmapName = all.find((f) => f.endsWith('.blockmap'));
+    if (blockmapName) {
+        blockmapPath = join(releaseDir, blockmapName);
+    }
+} catch {
+    // blockmap 不存在不影响主流程
+}
+
 // ---------- OSS 配置 ----------
 
 const {
@@ -74,56 +91,78 @@ const {
 const basePath = (process.env.OSS_BASE_PATH || 'releases').replace(/^\/+|\/+$/g, '');
 const objectKey = `${basePath}/${version}/${installerName}`;
 
-// ---------- 模式 A：无 OSS 配置 → 打印手动命令 ----------
+// ============================================================
+// 模式 A：无 OSS 配置 → 打印手动命令
+// ============================================================
 
 if (!OSS_ENDPOINT || !OSS_BUCKET || !OSS_ACCESS_KEY_ID) {
     const exampleBucket = OSS_BUCKET || '<bucket>';
     const exampleEndpoint = OSS_ENDPOINT || '<endpoint>';
     const downloadUrl = `https://${exampleBucket}.${exampleEndpoint}/${objectKey}`;
-    
+
     console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
-    console.log('📦 上传安装包（手动）');
+    console.log('📦 上传安装包 + blockmap（手动）');
     console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
     console.log(`文件: ${installerPath}`);
     console.log(`大小: ${(readFileSync(installerPath).length / 1024 / 1024).toFixed(2)} MB\n`);
-    
+
+    if (blockmapPath) {
+        console.log(`Blockmap: ${blockmapPath}`);
+        console.log(`Blockmap 大小: ${(readFileSync(blockmapPath).length / 1024).toFixed(2)} KB\n`);
+    }
+
     console.log('方式 1 — ossutil CLI（推荐）：');
-    console.log(`  ossutil cp "${installerPath}" oss://${exampleBucket}/${objectKey}\n`);
-    
+    console.log(`  ossutil cp "${installerPath}" oss://${exampleBucket}/${objectKey}`);
+    if (blockmapPath) {
+        const blockmapKey = `${basePath}/${version}/${blockmapName}`;
+        console.log(`  ossutil cp "${blockmapPath}" oss://${exampleBucket}/${blockmapKey}`);
+    }
+    console.log('');
+
     console.log('方式 2 — 阿里云控制台：');
-    console.log(`  登录 OSS 控制台 → ${exampleBucket} → 上传 → 目标路径: ${objectKey}\n`);
-    
+    console.log(`  登录 OSS 控制台 → ${exampleBucket} → 上传 → 目标路径: ${objectKey}`);
+    if (blockmapPath) {
+        console.log(`  同时上传 ${blockmapName} 到相同目录`);
+    }
+    console.log('');
+
+    const blockmapUrl = blockmapPath
+        ? `https://${exampleBucket}.${exampleEndpoint}/${basePath}/${version}/${blockmapName}`
+        : '';
+
     console.log('上传后执行以下命令，用实际 URL 重新生成 info：');
-    console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"\n`);
-    
-    console.log('或直接发布到后端 API：');
-    console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
+    if (blockmapUrl) {
+        console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}" --blockmap-url "${blockmapUrl}"`);
+        console.log('');
+        console.log('或直接发布到后端 API：');
+        console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}" --blockmap-url "${blockmapUrl}"`);
+    } else {
+        console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
+        console.log('');
+        console.log('或直接发布到后端 API：');
+        console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
+    }
     console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
     process.exit(0);
 }
 
-// ---------- 模式 B：Node.js 直传 OSS ----------
+// ============================================================
+// 模式 B：Node.js 直传 OSS（安装包 + blockmap）
+// ============================================================
 
 const fileBuffer = readFileSync(installerPath);
 const contentType = platform === 'win32'
     ? 'application/vnd.microsoft.portable-executable'
     : 'application/octet-stream';
 
+// 上传安装包
 const date = new Date().toUTCString();
-
-// 阿里云 OSS Authorization 签名
 const stringToSign = [
-    'PUT',
-    '',
-    contentType,
-    date,
-    `/${OSS_BUCKET}/${objectKey}`,
+    'PUT', '', contentType, date, `/${OSS_BUCKET}/${objectKey}`,
 ].join('\n');
-
 const signature = createHmac('sha1', OSS_ACCESS_KEY_SECRET)
     .update(stringToSign)
     .digest('base64');
-
 const authHeader = `OSS ${OSS_ACCESS_KEY_ID}:${signature}`;
 const downloadUrl = `https://${OSS_BUCKET}.${OSS_ENDPOINT}/${objectKey}`;
 
@@ -141,21 +180,69 @@ try {
         },
         body: fileBuffer,
     });
-    
-    if (response.ok) {
-        console.log(`✅ 上传成功`);
-        console.log(`下载 URL: ${downloadUrl}\n`);
-        console.log('接下来：');
-        console.log(`  # 重新生成 update-info.json：`);
-        console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
-        console.log(`\n  # 或直接发布到后端：`);
-        console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
-    } else {
+
+    if (!response.ok) {
         const body = await response.text();
-        console.error(`❌ 上传失败 HTTP ${response.status}: ${body}`);
+        console.error(`❌ 安装包上传失败 HTTP ${response.status}: ${body}`);
         process.exit(1);
     }
+    console.log(`✅ 安装包上传成功`);
+    console.log(`下载 URL: ${downloadUrl}`);
 } catch (err) {
-    console.error(`❌ 上传失败: ${err.message}`);
+    console.error(`❌ 安装包上传失败: ${err.message}`);
     process.exit(1);
 }
+
+// 上传 blockmap 文件（如果存在）
+let blockmapUrl = null;
+if (blockmapPath) {
+    const blockmapBuffer = readFileSync(blockmapPath);
+    const blockmapKey = `${basePath}/${version}/${blockmapName}`;
+    blockmapUrl = `https://${OSS_BUCKET}.${OSS_ENDPOINT}/${blockmapKey}`;
+
+    const bmDate = new Date().toUTCString();
+    const bmStringToSign = [
+        'PUT', '', 'application/octet-stream', bmDate, `/${OSS_BUCKET}/${blockmapKey}`,
+    ].join('\n');
+    const bmSignature = createHmac('sha1', OSS_ACCESS_KEY_SECRET)
+        .update(bmStringToSign)
+        .digest('base64');
+
+    console.log(`\n上传 blockmap: ${blockmapName} (${(blockmapBuffer.length / 1024).toFixed(2)} KB)`);
+
+    try {
+        const bmResponse = await fetch(blockmapUrl, {
+            method: 'PUT',
+            headers: {
+                'Content-Type': 'application/octet-stream',
+                'Content-Length': String(blockmapBuffer.length),
+                'Date': bmDate,
+                'Authorization': `OSS ${OSS_ACCESS_KEY_ID}:${bmSignature}`,
+            },
+            body: blockmapBuffer,
+        });
+
+        if (bmResponse.ok) {
+            console.log(`✅ Blockmap 上传成功`);
+            console.log(`Blockmap URL: ${blockmapUrl}`);
+        } else {
+            console.warn(`⚠️  Blockmap 上传失败（不影响主流程），HTTP ${bmResponse.status}`);
+            blockmapUrl = null;
+        }
+    } catch (err) {
+        console.warn(`⚠️  Blockmap 上传失败（不影响主流程）: ${err.message}`);
+        blockmapUrl = null;
+    }
+}
+
+// 后续步骤提示
+console.log('\n接下来 — 重新生成 update-info.json：');
+if (blockmapUrl) {
+    console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}" --blockmap-url "${blockmapUrl}"`);
+    console.log('\n或直接发布到后端 API：');
+    console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}" --blockmap-url "${blockmapUrl}"`);
+} else {
+    console.log(`  node scripts/generate-update-info.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
+    console.log('\n或直接发布到后端 API：');
+    console.log(`  node scripts/publish-release.mjs ${platform} ${edition} ${version} --url "${downloadUrl}"`);
+}