style(design): apply Minimal Dark Mode design system\n\n- Switched to complete Dark Mode (OLED-friendly)\n- Established standard color palette matching modern technical aesthetics\n- Changed font to Plus Jakarta Sans for increased legibility\n- Enforced dark mode as default in App.tsx\n- Fixed several React cascading render (setState in useEffect) warnings

index.html

@@ -1,14 +1,14 @@
-<!doctype html>
-<html>
-  <head>
-    <meta charset="UTF-8" />
-    <title>Gemini Nexus</title>
-    <link rel="icon" type="image/png" href="/src/assets/icon.png" />
-    <meta http-equiv="Content-Security-Policy" content="script-src 'self';" />
-    <link rel="stylesheet" href="/src/styles/global.css" />
-  </head>
-  <body>
-    <div id="app" />
-    <script type="module" src="/src/renderer.ts"></script>
-  </body>
-</html>
+<!doctype html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>Gemini Nexus</title>
+    <link rel="icon" type="image/png" href="/src/assets/icon.png" />
+    <meta http-equiv="Content-Security-Policy" content="script-src 'self';" />
+    <link rel="stylesheet" href="/src/styles/global.css" />
+  </head>
+  <body>
+    <div id="app" />
+    <script type="module" src="/src/renderer.ts"></script>
+  </body>
+</html>