feat(web): public mesh stats counter + /api/public/stats endpoint

Live social-proof counter on the landing page, tied to the E2E
narrative. Formatted as understated mono footer, not hero brag.

Backend — new GET /api/public/stats (unauthed, 60s in-memory cache):
  {
    messagesRouted: SELECT COUNT(*) FROM mesh.message_queue,
    meshesCreated: SELECT COUNT(*) FROM mesh.mesh WHERE archivedAt IS NULL,
    peersActive: SELECT COUNT(*) FROM mesh.presence WHERE disconnectedAt IS NULL,
    lastUpdated: ISO timestamp,
  }

Aggregate counts only — no ids, no names, no ciphertext, no routing
metadata. Safe for public consumption. cache-control header sets
public/s-maxage=60 for edge caching. `x-cache: HIT|MISS` for debug.

Frontend — new MeshStats Server Component at
modules/marketing/home/mesh-stats.tsx. Reads the endpoint server-side
via the ~/lib/api/server client, renders monospace footer:

  ciphertext routed → 4,217 messages · 12 meshes · 8 peers online
  broker sees none of it

Graceful zero state: when messagesRouted === 0 shows
"ciphertext → ready to route" instead of embarrassing zeros. Tabular-
nums for the numeric spans so they don't jitter across renders.

Mounted between <CallToAction /> and <LatestNewsToaster />. Page-level
`export const revalidate = 60` so Next.js ISR refreshes the counter
every minute without a DB hit on every request (combined with the
API cache = two-layer 60s TTL, DB sees ~1 query/minute).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/api/src/index.ts

@@ -15,6 +15,7 @@ import { authRouter } from "./modules/auth/router";
 import { billingRouter } from "./modules/billing/router";
 import { myRouter } from "./modules/mesh/router";
 import { organizationRouter } from "./modules/organization/router";
+import { publicRouter } from "./modules/public/router";
 import { storageRouter } from "./modules/storage/router";
 import { onError } from "./utils/on-error";
 
@@ -51,6 +52,7 @@ const appRouter = new Hono()
   .route("/billing", billingRouter)
   .route("/my", myRouter)
   .route("/organizations", organizationRouter)
+  .route("/public", publicRouter)
   .route("/storage", storageRouter)
   .onError(onError);
 

packages/api/src/modules/public/router.ts

@@ -0,0 +1,57 @@
+import { Hono } from "hono";
+
+import { count, isNull } from "@turbostarter/db";
+import { mesh, messageQueue, presence } from "@turbostarter/db/schema";
+import { db } from "@turbostarter/db/server";
+
+/**
+ * Unauthed public stats for the landing page counter.
+ *
+ * In-memory 60s cache. Results are aggregate counts only — no ids,
+ * no names, no ciphertext, no routing metadata. Safe for public consumption.
+ */
+const CACHE_TTL_MS = 60_000;
+
+interface PublicStats {
+  messagesRouted: number;
+  meshesCreated: number;
+  peersActive: number;
+  lastUpdated: string;
+}
+
+let cachedStats: { value: PublicStats; expiresAt: number } | null = null;
+
+const fetchStats = async (): Promise<PublicStats> => {
+  const [[messagesRouted], [meshesCreated], [peersActive]] = await Promise.all([
+    db.select({ c: count() }).from(messageQueue),
+    db
+      .select({ c: count() })
+      .from(mesh)
+      .where(isNull(mesh.archivedAt)),
+    db
+      .select({ c: count() })
+      .from(presence)
+      .where(isNull(presence.disconnectedAt)),
+  ]);
+
+  return {
+    messagesRouted: messagesRouted?.c ?? 0,
+    meshesCreated: meshesCreated?.c ?? 0,
+    peersActive: peersActive?.c ?? 0,
+    lastUpdated: new Date().toISOString(),
+  };
+};
+
+export const publicRouter = new Hono().get("/stats", async (c) => {
+  const now = Date.now();
+  if (cachedStats && cachedStats.expiresAt > now) {
+    c.header("x-cache", "HIT");
+    return c.json(cachedStats.value);
+  }
+
+  const value = await fetchStats();
+  cachedStats = { value, expiresAt: now + CACHE_TTL_MS };
+  c.header("x-cache", "MISS");
+  c.header("cache-control", "public, max-age=60, s-maxage=60");
+  return c.json(value);
+});

packages/api/src/schema/mesh-user.ts

@@ -186,6 +186,18 @@ export type GetMyMeshStreamResponse = z.infer<
   typeof getMyMeshStreamResponseSchema
 >;
 
+// ---------------------------------------------------------------------
+// Public stats (unauthed landing counter)
+// ---------------------------------------------------------------------
+
+export const publicStatsResponseSchema = z.object({
+  messagesRouted: z.number(),
+  meshesCreated: z.number(),
+  peersActive: z.number(),
+  lastUpdated: z.string(),
+});
+export type PublicStatsResponse = z.infer<typeof publicStatsResponseSchema>;
+
 export const getMyInvitesResponseSchema = z.object({
   sent: z.array(
     z.object({