Update Jest configuration to include TypeScript support and add new code quality checks workflow; translate comments to Russian and adjust paths in test files.

server/routers/procurement/routes/buy.js

@@ -202,6 +202,7 @@ router.get('/docs/:id/file', async (req, res) => {
     }
     
     const mimeType = mimeTypes[doc.type] || 'application/octet-stream'
+    // eslint-disable-next-line no-useless-escape
     const sanitizedName = doc.name.replace(/[^\w\s\-\.]/g, '_')
     
     res.setHeader('Content-Type', mimeType)