Refactor authentication components for modularity

Replaced `LoginForm` with a more extensible `AuthForm` and `AuthScreen`, enabling support for multiple auth strategies (e.g., OAuth) and improved reusability. Updated imports, routes, and configurations accordingly.

app/src/ui/modules/auth/SocialLink.tsx

@@ -0,0 +1,33 @@
+import { ucFirstAllSnakeToPascalWithSpaces } from "core/utils";
+import type { ReactNode } from "react";
+import { Button } from "ui/components/buttons/Button";
+import type { IconType } from "ui/components/buttons/IconButton";
+
+export type SocialLinkProps = {
+   label?: string;
+   provider: string;
+   icon?: IconType;
+   action: "login" | "register";
+   method?: "GET" | "POST";
+   basepath?: string;
+   children?: ReactNode;
+};
+
+export function SocialLink({
+   label,
+   provider,
+   icon,
+   action,
+   method = "POST",
+   basepath = "/api/auth",
+   children
+}: SocialLinkProps) {
+   return (
+      <form method={method} action={[basepath, name, action].join("/")} className="w-full">
+         <Button type="submit" size="large" variant="outline" className="justify-center w-full">
+            Continue with {label ?? ucFirstAllSnakeToPascalWithSpaces(provider)}
+         </Button>
+         {children}
+      </form>
+   );
+}