Fix DNS2 self-updater path and sync live dashboard version UI

dashcaddy-api/routes/exec.js

@@ -55,7 +55,9 @@ async function handleExec(ws, containerId, log) {
       if (chunks.length > 0 && Buffer.concat(chunks).toString().includes('/bash')) {
         shell = '/bin/bash';
       }
-    } catch (_) {}
+    } catch (_) {
+      // Fall back to /bin/sh when bash detection fails
+    }
 
     execInstance = await container.exec({
       Cmd: [shell],
@@ -96,21 +98,27 @@ async function handleExec(ws, containerId, log) {
             return;
           }
         }
-      } catch (_) {}
+      } catch (_) {
+        // Treat message as raw terminal input if JSON parsing fails
+      }
       // Regular terminal input
       execStream.write(data);
     });
 
     ws.on('close', () => {
       if (execStream) {
-        try { execStream.destroy(); } catch (_) {}
+        try { execStream.destroy(); } catch (_) {
+          // Ignore stream teardown errors on socket close
+        }
       }
     });
 
     ws.on('error', (err) => {
       log.warn('exec', 'WebSocket error', { containerId, error: err.message });
       if (execStream) {
-        try { execStream.destroy(); } catch (_) {}
+        try { execStream.destroy(); } catch (_) {
+          // Ignore stream teardown errors after websocket errors
+        }
       }
     });