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/components/theme-provider.tsx

@@ -1,7 +1,7 @@
 "use client";
 
-import * as React from "react";
 import { ThemeProvider as NextThemesProvider } from "next-themes";
+import type * as React from "react";
 
 export function ThemeProvider({
 	children,