refactor: remove useless try/catch wrappers

移除了 3 个无用的 try/catch 包装器：
- users.ts: 移除只重新抛出错误的外层 try/catch
- FileManager.tsx: 移除只重新抛出错误的内层 try/catch
- DiffViewer.tsx: 移除只重新抛出错误的内层 try/catch

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/backend/database/routes/users.ts

@@ -28,7 +28,6 @@ async function verifyOIDCToken(
   issuerUrl: string,
   clientId: string,
 ): Promise<any> {
-  try {
   const normalizedIssuerUrl = issuerUrl.endsWith("/")
     ? issuerUrl.slice(0, -1)
     : issuerUrl;
@@ -112,9 +111,6 @@ async function verifyOIDCToken(
   });
 
   return payload;
-  } catch (error) {
-    throw error;
-  }
 }
 
 const router = express.Router();

src/ui/Desktop/Apps/File Manager/FileManager.tsx

@@ -710,7 +710,6 @@ function FileManagerContent({ initialHost, onClose }: FileManagerProps) {
 
     try {
       const currentSessionId = sshSessionId;
-      try {
       const status = await getSSHStatus(currentSessionId);
       if (!status.connected) {
         const result = await connectSSH(currentSessionId, {
@@ -729,9 +728,6 @@ function FileManagerContent({ initialHost, onClose }: FileManagerProps) {
           throw new Error(t("fileManager.failedToReconnectSSH"));
         }
       }
-      } catch (sessionErr) {
-        throw sessionErr;
-      }
 
       const symlinkInfo = await identifySSHSymlink(currentSessionId, file.path);
 

src/ui/Desktop/Apps/File Manager/components/DiffViewer.tsx

@@ -62,7 +62,6 @@ export function DiffViewer({
         });
       }
     } catch (error) {
-      try {
       await connectSSH(sshSessionId, {
         hostId: sshHost.id,
         ip: sshHost.ip,
@@ -75,9 +74,6 @@ export function DiffViewer({
         credentialId: sshHost.credentialId,
         userId: sshHost.userId,
       });
-      } catch (reconnectError) {
-        throw reconnectError;
-      }
     }
   };