feat(web): user dashboard — my meshes, detail view, invites list

Four new routes under /dashboard/(user)/*:

- /dashboard/meshes — card grid of user's meshes with myRole badge,
  memberCount, tier, archived state. Empty state with "Create first mesh"
  CTA.
- /dashboard/meshes/[id] — mesh detail (members list + active invites)
  with "Generate invite link" CTA in header.
- /dashboard/meshes/new — placeholder route for create form (form lands
  in next commit).
- /dashboard/meshes/[id]/invite — placeholder route for invite generator
  (generator lands in next commit).
- /dashboard/invites — table of invites the user has issued across all
  meshes, with derived status (active/revoked/expired/exhausted).

Sidebar nav (user group) extended with Meshes + Invites entries. paths
config extended with dashboard.user.meshes.{index,new,mesh,invite} and
dashboard.user.invites.

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

apps/web/src/config/paths.ts

@@ -90,6 +90,13 @@ const pathsConfig = {
       index: DASHBOARD_PREFIX,
       ai: `${DASHBOARD_PREFIX}/ai`,
       vocabulary: `${DASHBOARD_PREFIX}/vocabulary`,
+      meshes: {
+        index: `${DASHBOARD_PREFIX}/meshes`,
+        new: `${DASHBOARD_PREFIX}/meshes/new`,
+        mesh: (id: string) => `${DASHBOARD_PREFIX}/meshes/${id}`,
+        invite: (id: string) => `${DASHBOARD_PREFIX}/meshes/${id}/invite`,
+      },
+      invites: `${DASHBOARD_PREFIX}/invites`,
       settings: {
         index: `${DASHBOARD_PREFIX}/settings`,
         security: `${DASHBOARD_PREFIX}/settings/security`,