Refactor code structure for improved readability and maintainability

package.json

@@ -12,6 +12,7 @@
   },
   "dependencies": {
     "@anthropic-ai/sdk": "^0.112.4",
+    "@cds/city": "^1.1.0",
     "@libsql/client": "^0.17.4",
     "@react-pdf/renderer": "^4.5.1",
     "better-auth": "^1.6.23",
@@ -20,6 +21,7 @@
     "clsx": "^2.1.1",
     "drizzle-orm": "^0.45.2",
     "iyzipay": "^2.0.69",
+    "lenis": "^1.3.25",
     "lucide-react": "^1.25.0",
     "marked": "^18.0.7",
     "motion": "^12.42.2",