fix: Implement proper fonts and visible logo

Font fixes:
- Added Title component styles in theme.ts to apply Forum font
- Body uses Zalando Sans via theme fontFamily
- All headings (h1-h6) now use Forum via Title component styles

Logo fixes:
- Rewrote SVG with simplified paths at larger scale
- Removed complex transforms causing content to be outside viewBox
- Logo now renders at 32x32px with clearly visible wave graphic
- Save button now generates draft from conversation

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

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

app/theme.ts

@@ -30,9 +30,18 @@ export const theme = createTheme({
   headings: {
     fontFamily: 'var(--font-forum), serif',
   },
+  // Define other font families to ensure Mantine variables are set
+  fontFamilyMonospace: 'ui-monospace, SFMono-Regular, "SF Mono", Monaco, Consolas, "Liberation Mono", "Courier New", monospace',
 
   // Set default component props for a consistent look
   components: {
+    Title: {
+      styles: {
+        root: {
+          fontFamily: 'var(--font-forum), serif',
+        },
+      },
+    },
     Button: {
       defaultProps: {
         variant: 'filled',