feat(web): universe dashboard — meshes + incoming invitations

New /dashboard landing that surfaces meshes and invitations-to-you
in one view. Replaces the simple mesh grid at /dashboard (preserved
at /dashboard/legacy).

Backend additions:
- GET /api/my/invites/incoming — pending_invite rows addressed to
  the authed user's email, joined with invite for role + expiry and
  user/mesh for display. Unaccepted + unrevoked + unexpired only.
- DELETE /api/my/invites/incoming/:id — dismiss a pending invite
  (revokes the pending_invite row only; underlying invite code stays
  valid so the inviter can re-send).

Web additions (all under apps/web/src/modules/dashboard/universe/):
- welcome.tsx — editorial serif header with mesh + invite counts
- invitations.tsx — client card with Accept (→ /i/:code claim flow)
  and optimistic Decline
- meshes-grid.tsx — hero card + compact grid, linked to mesh detail
- reveal.tsx — fade-up motion matching marketing _reveal.tsx

Styling uses the existing claudemesh design tokens (--cm-clay,
--cm-bg-elevated, Anthropic Sans/Serif/Mono) — nothing redefined.

Onboarding redirect (0 meshes → /meshes/new?onboarding=1) preserved,
now gated on 0 invitations too so users with pending invites still
land on the dashboard.

Sidebar icon switched to Atom for the "universe" concept.

Standalone prototype saved at prototypes/live-dashboard.html for
reference.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/modules/dashboard/universe/reveal.tsx

@@ -0,0 +1,38 @@
+"use client";
+
+import { motion, type Variants } from "motion/react";
+import type { ReactNode } from "react";
+
+const fade: Variants = {
+  hidden: { opacity: 0, y: 20, filter: "blur(4px)" },
+  visible: (i: number = 0) => ({
+    opacity: 1,
+    y: 0,
+    filter: "blur(0px)",
+    transition: {
+      duration: 0.7,
+      ease: [0.22, 0.61, 0.36, 1],
+      delay: i * 0.08,
+    },
+  }),
+};
+
+export const Reveal = ({
+  children,
+  delay = 0,
+  className,
+}: {
+  children: ReactNode;
+  delay?: number;
+  className?: string;
+}) => (
+  <motion.div
+    className={className}
+    variants={fade}
+    initial="hidden"
+    animate="visible"
+    custom={delay}
+  >
+    {children}
+  </motion.div>
+);