update: replace Draw with Paint image editor

- Remove Draw tool (whiteboard/diagrams)
- Add Paint image editor (paint.kit.pivoine.art)
- Features: multi-layer canvas, drawing tools, 50+ filters
- Inspired by miniPaint, built with modern web technologies
- Update icon to paintbrush
- Keep gradient-pink-rose styling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

components/ToolsGrid.tsx

@@ -61,15 +61,16 @@ const tools = [
     ),
   },
   {
-    title: 'Draw',
-    description: 'Virtual whiteboard for sketching hand-drawn style diagrams. Create flowcharts, wireframes, and visual brainstorming with collaborative editing.',
-    url: 'https://draw.kit.pivoine.art',
+    title: 'Paint',
+    description: 'Modern browser-based image editor with multi-layer canvas, drawing tools, and 50+ filters. Inspired by miniPaint, built for the modern web with full editing capabilities.',
+    url: 'https://paint.kit.pivoine.art',
     gradient: 'gradient-pink-rose',
     accentColor: '#ec4899',
-    badges: ['Open Source', 'Collaborative', 'Free'],
+    badges: ['Open Source', 'Image Editor', 'Free'],
     icon: (
       <svg className="w-12 h-12 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15.232 5.232l3.536 3.536m-2.036-5.036a2.5 2.5 0 113.536 3.536L6.5 21.036H3v-3.572L16.732 3.732z" />
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="m11 10l3 3m-7.5 8A3.5 3.5 0 1 0 3 17.5a2.62 2.62 0 0 1-.708 1.792A1 1 0 0 0 3 21z" />
+        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9.969 17.031L21.378 5.624a1 1 0 0 0-3.002-3.002L6.967 14.031" />
       </svg>
     ),
   },