feat: add comment wrapping to ASCII art tool

Add comment style selector (shadcn Select) to wrap generated ASCII art
with language-appropriate comment syntax (// # -- ; /* */ <!-- --> """).
Refactor preview controls to use shadcn ToggleGroup, Tooltip, and Badge.
Alignment is disabled when a comment style is active.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

components/ascii/FontPreview.tsx

@@ -5,6 +5,20 @@ import { toPng } from 'html-to-image';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Skeleton } from '@/components/ui/skeleton';
+import { Badge } from '@/components/ui/badge';
+import { ToggleGroup, ToggleGroupItem } from '@/components/ui/toggle-group';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from '@/components/ui/tooltip';
 import {
   Empty,
   EmptyDescription,
@@ -12,10 +26,41 @@ import {
   EmptyMedia,
   EmptyTitle,
 } from "@/components/ui/empty"
-import { Copy, Download, Share2, Image as ImageIcon, AlignLeft, AlignCenter, AlignRight, Type } from 'lucide-react';
+import { Copy, Download, Share2, Image as ImageIcon, AlignLeft, AlignCenter, AlignRight, Type, MessageSquareCode } from 'lucide-react';
 import { cn } from '@/lib/utils/cn';
 import { toast } from 'sonner';
 
+export type CommentStyle = 'none' | '//' | '#' | '--' | ';' | '/* */' | '<!-- -->' | '"""';
+
+const COMMENT_STYLES: { value: CommentStyle; label: string }[] = [
+  { value: 'none', label: 'None' },
+  { value: '//', label: '// C, JS, Go' },
+  { value: '#', label: '# Python, Shell' },
+  { value: '--', label: '-- SQL, Lua' },
+  { value: ';', label: '; Lisp, ASM' },
+  { value: '/* */', label: '/* */ Block' },
+  { value: '<!-- -->', label: '<!-- --> HTML' },
+  { value: '"""', label: '""" Docstring' },
+];
+
+function applyCommentStyle(text: string, style: CommentStyle): string {
+  if (style === 'none' || !text) return text;
+  const lines = text.split('\n');
+  switch (style) {
+    case '//':
+    case '#':
+    case '--':
+    case ';':
+      return lines.map(line => `${style} ${line}`).join('\n');
+    case '/* */':
+      return ['/*', ...lines.map(line => ` * ${line}`), ' */'].join('\n');
+    case '<!-- -->':
+      return ['<!--', ...lines, '-->'].join('\n');
+    case '"""':
+      return ['"""', ...lines, '"""'].join('\n');
+  }
+}
+
 export interface FontPreviewProps {
   text: string;
   font?: string;
@@ -23,17 +68,25 @@ export interface FontPreviewProps {
   onCopy?: () => void;
   onDownload?: () => void;
   onShare?: () => void;
+  onCommentedTextChange?: (commentedText: string) => void;
   className?: string;
 }
 
 type TextAlign = 'left' | 'center' | 'right';
 
-export function FontPreview({ text, font, isLoading, onCopy, onDownload, onShare, className }: FontPreviewProps) {
-  const lineCount = text ? text.split('\n').length : 0;
-  const charCount = text ? text.length : 0;
+export function FontPreview({ text, font, isLoading, onCopy, onDownload, onShare, onCommentedTextChange, className }: FontPreviewProps) {
   const previewRef = React.useRef<HTMLDivElement>(null);
   const [textAlign, setTextAlign] = React.useState<TextAlign>('left');
   const [fontSize, setFontSize] = React.useState<'xs' | 'sm' | 'base'>('sm');
+  const [commentStyle, setCommentStyle] = React.useState<CommentStyle>('none');
+
+  const commentedText = React.useMemo(() => applyCommentStyle(text, commentStyle), [text, commentStyle]);
+  const lineCount = commentedText ? commentedText.split('\n').length : 0;
+  const charCount = commentedText ? commentedText.length : 0;
+
+  React.useEffect(() => {
+    onCommentedTextChange?.(commentedText);
+  }, [commentedText, onCommentedTextChange]);
 
   const handleExportPNG = async () => {
     if (!previewRef.current || !text) return;
@@ -55,92 +108,116 @@ export function FontPreview({ text, font, isLoading, onCopy, onDownload, onShare
       toast.error('Failed to export PNG');
     }
   };
+
   return (
     <Card className={cn('relative', className)}>
       <CardHeader className="flex flex-row items-center justify-between flex-wrap gap-2">
         <div className="flex items-center gap-2">
           <CardTitle>Preview</CardTitle>
           {font && (
-            <span className="text-[10px] px-1.5 py-0.5 bg-primary/10 text-primary rounded font-mono">
+            <Badge className="text-[10px] font-mono">
               {font}
-            </span>
+            </Badge>
           )}
         </div>
         <div className="flex gap-1.5 flex-wrap">
           {onCopy && (
-            <Button variant="outline" size="xs" onClick={onCopy}>
-              <Copy className="h-3 w-3 mr-1" />
-              Copy
-            </Button>
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button variant="outline" size="xs" onClick={onCopy}>
+                  <Copy className="h-3 w-3 mr-1" />
+                  Copy
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent>Copy to clipboard</TooltipContent>
+            </Tooltip>
           )}
           {onShare && (
-            <Button variant="outline" size="xs" onClick={onShare} title="Copy shareable URL">
-              <Share2 className="h-3 w-3 mr-1" />
-              Share
-            </Button>
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button variant="outline" size="xs" onClick={onShare}>
+                  <Share2 className="h-3 w-3 mr-1" />
+                  Share
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent>Copy shareable URL</TooltipContent>
+            </Tooltip>
           )}
-          <Button variant="outline" size="xs" onClick={handleExportPNG} title="Export as PNG">
-            <ImageIcon className="h-3 w-3 mr-1" />
-            PNG
-          </Button>
+          <Tooltip>
+            <TooltipTrigger asChild>
+              <Button variant="outline" size="xs" onClick={handleExportPNG}>
+                <ImageIcon className="h-3 w-3 mr-1" />
+                PNG
+              </Button>
+            </TooltipTrigger>
+            <TooltipContent>Export as PNG</TooltipContent>
+          </Tooltip>
           {onDownload && (
-            <Button variant="outline" size="xs" onClick={onDownload}>
-              <Download className="h-3 w-3 mr-1" />
-              TXT
-            </Button>
+            <Tooltip>
+              <TooltipTrigger asChild>
+                <Button variant="outline" size="xs" onClick={onDownload}>
+                  <Download className="h-3 w-3 mr-1" />
+                  TXT
+                </Button>
+              </TooltipTrigger>
+              <TooltipContent>Download as text file</TooltipContent>
+            </Tooltip>
           )}
         </div>
       </CardHeader>
       <CardContent className="space-y-3">
         {/* Controls */}
         <div className="flex items-center gap-2 flex-wrap">
-          <div className="flex items-center border rounded-md p-0.5">
-            <button
-              onClick={() => setTextAlign('left')}
-              className={cn(
-                'p-1 rounded transition-colors',
-                textAlign === 'left' ? 'bg-accent' : 'hover:bg-accent/50'
-              )}
-              title="Align left"
-            >
+          <ToggleGroup
+            type="single"
+            value={textAlign}
+            onValueChange={(v) => v && setTextAlign(v as TextAlign)}
+            variant="outline"
+            size="sm"
+            disabled={commentStyle !== 'none'}
+          >
+            <ToggleGroupItem value="left" aria-label="Align left" className="px-1.5">
               <AlignLeft className="h-3 w-3" />
-            </button>
-            <button
-              onClick={() => setTextAlign('center')}
-              className={cn(
-                'p-1 rounded transition-colors',
-                textAlign === 'center' ? 'bg-accent' : 'hover:bg-accent/50'
-              )}
-              title="Align center"
-            >
+            </ToggleGroupItem>
+            <ToggleGroupItem value="center" aria-label="Align center" className="px-1.5">
               <AlignCenter className="h-3 w-3" />
-            </button>
-            <button
-              onClick={() => setTextAlign('right')}
-              className={cn(
-                'p-1 rounded transition-colors',
-                textAlign === 'right' ? 'bg-accent' : 'hover:bg-accent/50'
-              )}
-              title="Align right"
-            >
+            </ToggleGroupItem>
+            <ToggleGroupItem value="right" aria-label="Align right" className="px-1.5">
               <AlignRight className="h-3 w-3" />
-            </button>
-          </div>
+            </ToggleGroupItem>
+          </ToggleGroup>
 
-          <div className="flex items-center border rounded-md p-0.5">
-            {(['xs', 'sm', 'base'] as const).map((s) => (
-              <button
-                key={s}
-                onClick={() => setFontSize(s)}
-                className={cn(
-                  'px-1.5 py-0.5 text-[10px] rounded transition-colors uppercase',
-                  fontSize === s ? 'bg-accent' : 'hover:bg-accent/50'
-                )}
-              >
-                {s === 'base' ? 'md' : s}
-              </button>
-            ))}
-          </div>
+          <ToggleGroup
+            type="single"
+            value={fontSize}
+            onValueChange={(v) => v && setFontSize(v as 'xs' | 'sm' | 'base')}
+            variant="outline"
+            size="sm"
+          >
+            <ToggleGroupItem value="xs" aria-label="Extra small font" className="px-1.5 text-[10px] uppercase">
+              xs
+            </ToggleGroupItem>
+            <ToggleGroupItem value="sm" aria-label="Small font" className="px-1.5 text-[10px] uppercase">
+              sm
+            </ToggleGroupItem>
+            <ToggleGroupItem value="base" aria-label="Medium font" className="px-1.5 text-[10px] uppercase">
+              md
+            </ToggleGroupItem>
+          </ToggleGroup>
+
+          <Select value={commentStyle} onValueChange={(v) => setCommentStyle(v as CommentStyle)}>
+            <SelectTrigger size="sm" className="h-8 w-auto gap-1 text-xs">
+              <MessageSquareCode className="h-3 w-3 text-foreground shrink-0" />
+              <SelectValue />
+            </SelectTrigger>
+            <SelectContent>
+              {COMMENT_STYLES.map((s) => (
+                <SelectItem key={s.value} value={s.value}>
+                  {s.label}
+                </SelectItem>
+              ))}
+            </SelectContent>
+          </Select>
 
           {!isLoading && text && (
             <div className="flex gap-2 text-[10px] text-muted-foreground ml-auto">
@@ -154,8 +231,8 @@ export function FontPreview({ text, font, isLoading, onCopy, onDownload, onShare
           ref={previewRef}
           className={cn(
             'relative min-h-[200px] bg-muted/50 rounded-lg p-4 overflow-x-auto',
-            textAlign === 'center' && 'text-center',
-            textAlign === 'right' && 'text-right'
+            commentStyle === 'none' && textAlign === 'center' && 'text-center',
+            commentStyle === 'none' && textAlign === 'right' && 'text-right'
           )}
         >
           {isLoading ? (
@@ -174,7 +251,7 @@ export function FontPreview({ text, font, isLoading, onCopy, onDownload, onShare
               fontSize === 'sm' && 'text-xs sm:text-sm',
               fontSize === 'base' && 'text-sm sm:text-base'
             )}>
-              {text}
+              {commentedText}
             </pre>
           ) : (
             <Empty>