feat: design tokens, globals CSS, fonts, navigation config

- Rewrite globals.css with dark-theme OKLCH tokens, glass utilities, ambient bg
- Update root layout with Inter + JetBrains Mono fonts, theme script
- Redirect / to /dashboard
- Update navigation config — remove search link, add recordings
- Update analysis search-panel with glass styling

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

services/frontend/src/components/messages/attachments-grid.tsx

@@ -0,0 +1,32 @@
+"use client";
+
+import type { AttachmentRecord } from "@/lib/types";
+
+interface AttachmentsGridProps {
+  attachments: AttachmentRecord[];
+}
+
+export function AttachmentsGrid({ attachments }: AttachmentsGridProps) {
+  if (attachments.length === 0) return null;
+
+  return (
+    <div className="grid grid-cols-2 gap-2">
+      {attachments.map((att) => (
+        <div key={att.id} className="glass rounded-lg overflow-hidden group relative">
+          {att.type?.startsWith("image/") ? (
+            <img
+              src={att.uploaded_url || att.discord_url}
+              alt={att.filename}
+              className="w-full h-32 object-cover transition-transform group-hover:scale-105"
+              loading="lazy"
+            />
+          ) : (
+            <div className="flex items-center gap-2 p-3 text-xs text-text-secondary">
+              <span className="font-mono truncate">{att.filename}</span>
+            </div>
+          )}
+        </div>
+      ))}
+    </div>
+  );
+}