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/popover.tsx

@@ -1,76 +1,72 @@
 "use client";
 
-import * as PopoverPrimitive from "@radix-ui/react-popover";
-import type * as React from "react";
+import { Popover as PopoverPrimitive } from "@base-ui/react/popover";
+import * as React from "react";
 
 import { cn } from "@/lib/utils";
 
-function Popover({
-  ...props
-}: React.ComponentProps<typeof PopoverPrimitive.Root>) {
+function Popover({ ...props }: PopoverPrimitive.Root.Props) {
   return <PopoverPrimitive.Root data-slot="popover" {...props} />;
 }
 
-function PopoverTrigger({
-  ...props
-}: React.ComponentProps<typeof PopoverPrimitive.Trigger>) {
+function PopoverTrigger({ ...props }: PopoverPrimitive.Trigger.Props) {
   return <PopoverPrimitive.Trigger data-slot="popover-trigger" {...props} />;
 }
 
 function PopoverContent({
   className,
   align = "center",
+  alignOffset = 0,
+  side = "bottom",
   sideOffset = 4,
   ...props
-}: React.ComponentProps<typeof PopoverPrimitive.Content>) {
+}: PopoverPrimitive.Popup.Props &
+  Pick<PopoverPrimitive.Positioner.Props, "align" | "alignOffset" | "side" | "sideOffset">) {
   return (
     <PopoverPrimitive.Portal>
-      <PopoverPrimitive.Content
-        data-slot="popover-content"
+      <PopoverPrimitive.Positioner
         align={align}
+        alignOffset={alignOffset}
+        side={side}
         sideOffset={sideOffset}
-        className={cn(
-          "data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 z-50 w-72 origin-(--radix-popover-content-transform-origin) rounded-md border bg-popover p-4 text-popover-foreground shadow-md outline-hidden data-[state=closed]:animate-out data-[state=open]:animate-in",
-          className,
-        )}
-        {...props}
-      />
+        className="isolate z-50"
+      >
+        <PopoverPrimitive.Popup
+          data-slot="popover-content"
+          className={cn(
+            "bg-popover text-popover-foreground ring-foreground/10 data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95 z-50 flex w-72 origin-(--transform-origin) flex-col gap-2.5 rounded-lg p-2.5 text-sm shadow-md ring-1 outline-hidden duration-100",
+            className,
+          )}
+          {...props}
+        />
+      </PopoverPrimitive.Positioner>
     </PopoverPrimitive.Portal>
   );
 }
 
-function PopoverAnchor({
-  ...props
-}: React.ComponentProps<typeof PopoverPrimitive.Anchor>) {
-  return <PopoverPrimitive.Anchor data-slot="popover-anchor" {...props} />;
-}
-
 function PopoverHeader({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="popover-header"
-      className={cn("flex flex-col gap-1 text-sm", className)}
+      className={cn("flex flex-col gap-0.5 text-sm", className)}
       {...props}
     />
   );
 }
 
-function PopoverTitle({ className, ...props }: React.ComponentProps<"h2">) {
+function PopoverTitle({ className, ...props }: PopoverPrimitive.Title.Props) {
   return (
-    <div
+    <PopoverPrimitive.Title
       data-slot="popover-title"
-      className={cn("font-medium", className)}
+      className={cn("font-heading font-medium", className)}
       {...props}
     />
   );
 }
 
-function PopoverDescription({
-  className,
-  ...props
-}: React.ComponentProps<"p">) {
+function PopoverDescription({ className, ...props }: PopoverPrimitive.Description.Props) {
   return (
-    <p
+    <PopoverPrimitive.Description
       data-slot="popover-description"
       className={cn("text-muted-foreground", className)}
       {...props}
@@ -78,12 +74,4 @@ function PopoverDescription({
   );
 }
 
-export {
-  Popover,
-  PopoverTrigger,
-  PopoverContent,
-  PopoverAnchor,
-  PopoverHeader,
-  PopoverTitle,
-  PopoverDescription,
-};
+export { Popover, PopoverContent, PopoverDescription, PopoverHeader, PopoverTitle, PopoverTrigger };