feat: migrate from static config to database and add authentication

- Replaced static hosts.json and staticConfig.ts with SQLite database (Prisma)

- Implemented JWT authentication and Login UI

- Added dynamic API routes for hosts, topology, and settings

- Updated UI components to fetch and manage state dynamically

- Added Settings interface for managing hosts and topology nodes

src/index.css

@@ -1,3 +1,5 @@
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
+
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
@@ -29,6 +31,37 @@ body {
   height: 100vh;
 }
 
+/* ── Custom Scrollbar ────────────────────────────────────── */
+::-webkit-scrollbar {
+  width: 8px;
+  height: 8px;
+}
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+::-webkit-scrollbar-thumb {
+  background: rgba(255, 255, 255, 0.1);
+  border-radius: 4px;
+}
+::-webkit-scrollbar-thumb:hover {
+  background: rgba(255, 255, 255, 0.2);
+}
+
+/* ── Glassmorphism Utility ───────────────────────────────── */
+.glass {
+  background: rgba(30, 41, 59, 0.7);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+}
+.glass-panel {
+  background: rgba(15, 23, 42, 0.75);
+  backdrop-filter: blur(16px);
+  -webkit-backdrop-filter: blur(16px);
+  border-right: 1px solid rgba(255, 255, 255, 0.05);
+  border-left: 1px solid rgba(255, 255, 255, 0.05);
+}
+
 /* ── Skip link (a11y) ────────────────────────────────────── */
 .skip-link {
   position: absolute;