feat(ui): enhance shadcn dialog, tabs, tooltip, and command components

- Add showCloseButton prop to DialogContent for modal workflows
- Add line variant to TabsList via class-variance-authority
- Add arrowClassName prop to TooltipContent for arrow styling
- Add optional title prop to CommandDialog for accessibility

src/components/ui/command.tsx

@@ -6,7 +6,7 @@ import { Command as CommandPrimitive } from "cmdk";
 import { Search } from "lucide-react";
 
 import { cn } from "@/lib/utils";
-import { Dialog, DialogContent } from "@/components/ui/dialog";
+import { Dialog, DialogContent, DialogTitle } from "@/components/ui/dialog";
 
 const Command = React.forwardRef<
   React.ElementRef<typeof CommandPrimitive>,
@@ -23,10 +23,15 @@ const Command = React.forwardRef<
 ));
 Command.displayName = CommandPrimitive.displayName;
 
-const CommandDialog = ({ children, ...props }: DialogProps) => {
+const CommandDialog = ({
+  children,
+  title,
+  ...props
+}: DialogProps & { title?: React.ReactNode }) => {
   return (
     <Dialog {...props}>
       <DialogContent className="overflow-hidden p-0">
+        {title && <DialogTitle className="sr-only">{title}</DialogTitle>}
         <Command className="[&_[cmdk-group-heading]]:px-2 [&_[cmdk-group-heading]]:font-medium [&_[cmdk-group-heading]]:text-muted-foreground [&_[cmdk-group]:not([hidden])_~[cmdk-group]]:pt-0 [&_[cmdk-group]]:px-2 [&_[cmdk-input-wrapper]_svg]:h-5 [&_[cmdk-input-wrapper]_svg]:w-5 [&_[cmdk-input]]:h-12 [&_[cmdk-item]]:px-2 [&_[cmdk-item]]:py-3 [&_[cmdk-item]_svg]:h-5 [&_[cmdk-item]_svg]:w-5">
           {children}
         </Command>

src/components/ui/dialog.tsx

@@ -31,8 +31,10 @@ DialogOverlay.displayName = DialogPrimitive.Overlay.displayName;
 
 const DialogContent = React.forwardRef<
   React.ElementRef<typeof DialogPrimitive.Content>,
-  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content>
->(({ className, children, ...props }, ref) => (
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content> & {
+    showCloseButton?: boolean;
+  }
+>(({ className, children, showCloseButton = true, ...props }, ref) => (
   <DialogPortal>
     <DialogOverlay />
     <DialogPrimitive.Content
@@ -44,10 +46,12 @@ const DialogContent = React.forwardRef<
       {...props}
     >
       {children}
-      <DialogPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
-        <X className="h-4 w-4" />
-        <span className="sr-only">Close</span>
-      </DialogPrimitive.Close>
+      {showCloseButton && (
+        <DialogPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+          <X className="h-4 w-4" />
+          <span className="sr-only">Close</span>
+        </DialogPrimitive.Close>
+      )}
     </DialogPrimitive.Content>
   </DialogPortal>
 ));

src/components/ui/tabs.tsx

@@ -2,21 +2,36 @@
 
 import * as React from "react";
 import * as TabsPrimitive from "@radix-ui/react-tabs";
+import { cva, type VariantProps } from "class-variance-authority";
 
 import { cn } from "@/lib/utils";
 
 const Tabs = TabsPrimitive.Root;
 
+const tabsListVariants = cva(
+  "inline-flex items-center justify-center text-muted-foreground",
+  {
+    variants: {
+      variant: {
+        default: "h-9 rounded-lg bg-muted p-1",
+        line: "h-9 w-full justify-start gap-1 border-b border-border bg-transparent p-0 group",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  },
+);
+
 const TabsList = React.forwardRef<
   React.ElementRef<typeof TabsPrimitive.List>,
-  React.ComponentPropsWithoutRef<typeof TabsPrimitive.List>
->(({ className, ...props }, ref) => (
+  React.ComponentPropsWithoutRef<typeof TabsPrimitive.List> &
+    VariantProps<typeof tabsListVariants>
+>(({ className, variant, ...props }, ref) => (
   <TabsPrimitive.List
     ref={ref}
-    className={cn(
-      "inline-flex h-9 items-center justify-center rounded-lg bg-muted p-1 text-muted-foreground",
-      className,
-    )}
+    data-variant={variant ?? "default"}
+    className={cn(tabsListVariants({ variant, className }))}
     {...props}
   />
 ));
@@ -30,6 +45,9 @@ const TabsTrigger = React.forwardRef<
     ref={ref}
     className={cn(
       "inline-flex items-center justify-center whitespace-nowrap rounded-md px-3 py-1 text-sm font-medium ring-offset-background transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow",
+      // "line" variant: underline-style triggers (applies only when the parent
+      // TabsList has data-variant="line" + the `group` class from the cva above).
+      "group-data-[variant=line]:rounded-none group-data-[variant=line]:border-b-2 group-data-[variant=line]:border-transparent group-data-[variant=line]:bg-transparent group-data-[variant=line]:px-4 group-data-[variant=line]:py-2 group-data-[variant=line]:shadow-none group-data-[variant=line]:data-[state=active]:border-primary group-data-[variant=line]:data-[state=active]:bg-transparent group-data-[variant=line]:data-[state=active]:text-foreground group-data-[variant=line]:data-[state=active]:shadow-none",
       className,
     )}
     {...props}

src/components/ui/tooltip.tsx

@@ -13,8 +13,10 @@ const TooltipTrigger = TooltipPrimitive.Trigger;
 
 const TooltipContent = React.forwardRef<
   React.ElementRef<typeof TooltipPrimitive.Content>,
-  React.ComponentPropsWithoutRef<typeof TooltipPrimitive.Content>
->(({ className, sideOffset = 4, ...props }, ref) => (
+  React.ComponentPropsWithoutRef<typeof TooltipPrimitive.Content> & {
+    arrowClassName?: string;
+  }
+>(({ className, sideOffset = 4, arrowClassName, children, ...props }, ref) => (
   <TooltipPrimitive.Portal>
     <TooltipPrimitive.Content
       ref={ref}
@@ -24,7 +26,10 @@ const TooltipContent = React.forwardRef<
         className,
       )}
       {...props}
-    />
+    >
+      {arrowClassName && <TooltipPrimitive.Arrow className={arrowClassName} />}
+      {children}
+    </TooltipPrimitive.Content>
   </TooltipPrimitive.Portal>
 ));
 TooltipContent.displayName = TooltipPrimitive.Content.displayName;