fix: update AI SDK message serialization to follow best practices

- Use ModelMessage type instead of any[] for type safety
- Format assistant messages with tool calls using ToolCallPart in content array
- Format tool messages with ToolResultPart using proper output structure
- Add ToolCallCard component for sexy debug display of tool calls in chat
- Remove debug console.log statements

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

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

packages/ui/src/Icon/icons.ts

@@ -32,6 +32,10 @@ export const icons = {
     viewBox: '0 0 24 24',
     path: 'M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z',
   },
+  clock: {
+    viewBox: '0 0 24 24',
+    path: 'M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67V7z',
+  },
   link: {
     viewBox: '0 0 24 24',
     path: 'M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z',