refactor: migrate from Biome to oxlint/oxfmt, remove contact form

- Replace Biome with oxlint + oxfmt (OXC toolchain) for linting and formatting
- Add .oxlintrc.json and .oxfmtrc.json configuration files
- Update VS Code settings and devcontainer to use oxc-vscode extension
- Remove contact form, Resend email integration, and related server action/schema
- Remove unused UI components (accordion, alert, card, tabs, toggle, etc.)

components/ui/avatar.tsx

@@ -1,7 +1,7 @@
 "use client";
 
-import * as AvatarPrimitive from "@radix-ui/react-avatar";
-import type * as React from "react";
+import { Avatar as AvatarPrimitive } from "@base-ui/react/avatar";
+import * as React from "react";
 
 import { cn } from "@/lib/utils";
 
@@ -9,7 +9,7 @@ function Avatar({
   className,
   size = "default",
   ...props
-}: React.ComponentProps<typeof AvatarPrimitive.Root> & {
+}: AvatarPrimitive.Root.Props & {
   size?: "default" | "sm" | "lg";
 }) {
   return (
@@ -17,7 +17,7 @@ function Avatar({
       data-slot="avatar"
       data-size={size}
       className={cn(
-        "group/avatar relative flex size-8 shrink-0 select-none overflow-hidden rounded-full data-[size=lg]:size-10 data-[size=sm]:size-6",
+        "group/avatar after:border-border relative flex size-8 shrink-0 rounded-full select-none after:absolute after:inset-0 after:rounded-full after:border after:mix-blend-darken data-[size=lg]:size-10 data-[size=sm]:size-6 dark:after:mix-blend-lighten",
         className,
       )}
       {...props}
@@ -25,28 +25,22 @@ function Avatar({
   );
 }
 
-function AvatarImage({
-  className,
-  ...props
-}: React.ComponentProps<typeof AvatarPrimitive.Image>) {
+function AvatarImage({ className, ...props }: AvatarPrimitive.Image.Props) {
   return (
     <AvatarPrimitive.Image
       data-slot="avatar-image"
-      className={cn("aspect-square size-full", className)}
+      className={cn("aspect-square size-full rounded-full object-cover", className)}
       {...props}
     />
   );
 }
 
-function AvatarFallback({
-  className,
-  ...props
-}: React.ComponentProps<typeof AvatarPrimitive.Fallback>) {
+function AvatarFallback({ className, ...props }: AvatarPrimitive.Fallback.Props) {
   return (
     <AvatarPrimitive.Fallback
       data-slot="avatar-fallback"
       className={cn(
-        "flex size-full items-center justify-center rounded-full bg-muted text-muted-foreground text-sm group-data-[size=sm]/avatar:text-xs",
+        "bg-muted text-muted-foreground flex size-full items-center justify-center rounded-full text-sm group-data-[size=sm]/avatar:text-xs",
         className,
       )}
       {...props}
@@ -59,7 +53,7 @@ function AvatarBadge({ className, ...props }: React.ComponentProps<"span">) {
     <span
       data-slot="avatar-badge"
       className={cn(
-        "absolute right-0 bottom-0 z-10 inline-flex select-none items-center justify-center rounded-full bg-primary text-primary-foreground ring-2 ring-background",
+        "bg-primary text-primary-foreground ring-background absolute right-0 bottom-0 z-10 inline-flex items-center justify-center rounded-full bg-blend-color ring-2 select-none",
         "group-data-[size=sm]/avatar:size-2 group-data-[size=sm]/avatar:[&>svg]:hidden",
         "group-data-[size=default]/avatar:size-2.5 group-data-[size=default]/avatar:[&>svg]:size-2",
         "group-data-[size=lg]/avatar:size-3 group-data-[size=lg]/avatar:[&>svg]:size-2",
@@ -75,7 +69,7 @@ function AvatarGroup({ className, ...props }: React.ComponentProps<"div">) {
     <div
       data-slot="avatar-group"
       className={cn(
-        "group/avatar-group flex -space-x-2 *:data-[slot=avatar]:ring-2 *:data-[slot=avatar]:ring-background",
+        "group/avatar-group *:data-[slot=avatar]:ring-background flex -space-x-2 *:data-[slot=avatar]:ring-2",
         className,
       )}
       {...props}
@@ -83,15 +77,12 @@ function AvatarGroup({ className, ...props }: React.ComponentProps<"div">) {
   );
 }
 
-function AvatarGroupCount({
-  className,
-  ...props
-}: React.ComponentProps<"div">) {
+function AvatarGroupCount({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="avatar-group-count"
       className={cn(
-        "relative flex size-8 shrink-0 items-center justify-center rounded-full bg-muted text-muted-foreground text-sm ring-2 ring-background group-has-data-[size=lg]/avatar-group:size-10 group-has-data-[size=sm]/avatar-group:size-6 [&>svg]:size-4 group-has-data-[size=lg]/avatar-group:[&>svg]:size-5 group-has-data-[size=sm]/avatar-group:[&>svg]:size-3",
+        "bg-muted text-muted-foreground ring-background relative flex size-8 shrink-0 items-center justify-center rounded-full text-sm ring-2 group-has-data-[size=lg]/avatar-group:size-10 group-has-data-[size=sm]/avatar-group:size-6 [&>svg]:size-4 group-has-data-[size=lg]/avatar-group:[&>svg]:size-5 group-has-data-[size=sm]/avatar-group:[&>svg]:size-3",
         className,
       )}
       {...props}
@@ -99,11 +90,4 @@ function AvatarGroupCount({
   );
 }
 
-export {
-  Avatar,
-  AvatarImage,
-  AvatarFallback,
-  AvatarBadge,
-  AvatarGroup,
-  AvatarGroupCount,
-};
+export { Avatar, AvatarImage, AvatarFallback, AvatarGroup, AvatarGroupCount, AvatarBadge };