MVP: Pulse, Memory, History modules

- Mobile-first PWA with dark glassmorphic theme
- Pulse: status card, recent sessions, memory snapshot
- Memory: view/edit agent + user memory with usage bars
- History: session list, platform filter, search, session replay
- TanStack Query hooks for all Hermes WebAPI endpoints
- Bottom tab navigation, safe-area support

lib/utils.ts

@@ -0,0 +1,39 @@
+export function timeAgo(ts: number): string {
+  const now = Date.now() / 1000;
+  const diff = now - ts;
+  if (diff < 60) return "just now";
+  if (diff < 3600) return `${Math.floor(diff / 60)}m ago`;
+  if (diff < 86400) return `${Math.floor(diff / 3600)}h ago`;
+  if (diff < 604800) return `${Math.floor(diff / 86400)}d ago`;
+  return new Date(ts * 1000).toLocaleDateString();
+}
+
+export function formatTokens(n: number): string {
+  if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)}M`;
+  if (n >= 1_000) return `${(n / 1_000).toFixed(1)}k`;
+  return String(n);
+}
+
+export function platformColor(source: string): string {
+  const map: Record<string, string> = {
+    cli: "#f59e0b",
+    telegram: "#38bdf8",
+    discord: "#8b5cf6",
+    whatsapp: "#22c55e",
+    web: "#a78bfa",
+    webapi: "#a78bfa",
+  };
+  return map[source] || "#6b7280";
+}
+
+export function platformBadgeClass(source: string): string {
+  const map: Record<string, string> = {
+    cli: "badge-cli",
+    telegram: "badge-telegram",
+    discord: "badge-discord",
+    whatsapp: "badge-whatsapp",
+    web: "badge-web",
+    webapi: "badge-web",
+  };
+  return map[source] || "badge-cli";
+}