feat: add DM Sans and Source Code Pro fonts from Figma design

Author: Factory Bot

cortex-gui/index.html

@@ -6,6 +6,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Cortex Desktop</title>
 
+    <!-- Google Fonts - DM Sans & Source Code Pro -->
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Source+Code+Pro:wght@400;500&display=swap" rel="stylesheet">
+    
     <!-- Inter Font - Local (No external requests for faster startup) -->
     <link rel="preload" href="/fonts/Inter-Regular.woff2" as="font" type="font/woff2" crossorigin>
     <link rel="preload" href="/fonts/Inter-Medium.woff2" as="font" type="font/woff2" crossorigin>

cortex-gui/src/styles/figma-tokens.css

@@ -162,8 +162,16 @@
      =========================================================================== */
 
   /* Font Families */
-  --figma-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
-  --figma-font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Monaco', 'Consolas', 'Liberation Mono', 'Courier New', monospace;
+  --figma-font-sans: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+  --figma-font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; /* Fallback for Neue Haas Grotesk */
+  --figma-font-mono: 'Source Code Pro', 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
+  
+  /* Figma Design Colors */
+  --figma-text-inactive: #747577;
+  --figma-text-secondary-alt: #77787A;
+  --figma-text-accent-blue: #9CCFFF;
+  --figma-text-line-number: rgba(255, 255, 255, 0.5);
+  --figma-card-border: rgba(255, 255, 255, 0.15);
 
   /* Font Sizes */
   --figma-text-xs: 12px;