style: standardize import ordering, type imports, and formatting in source files

Sort imports alphabetically, convert value imports to type-only where
appropriate, normalize indentation to tabs, and sort exports
alphabetically across UI components, pages, and lib modules.

src/app/layout.tsx

@@ -1,11 +1,11 @@
 import type { Metadata } from "next";
 import { Geist, Magra } from "next/font/google";
 import "./globals.css";
+import Link from "next/link";
 import { ThemeProvider } from "next-themes";
 import { ModeToggle } from "@/components/mode-toggle";
 import SignIn from "@/components/sign-in";
 import { Toaster } from "@/components/ui/sonner";
-import Link from "next/link";
 
 const geist = Geist({
 	subsets: ["latin", "cyrillic"],