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/app/[locale]/dashboard/(user)/layout.tsx

@@ -21,9 +21,14 @@ const menu = [
         icon: Icons.Home,
       },
       {
-        title: "aiTools",
-        href: pathsConfig.apps.chat.index,
-        icon: Icons.Sparkles,
+        title: "meshes",
+        href: pathsConfig.dashboard.user.meshes.index,
+        icon: Icons.Share,
+      },
+      {
+        title: "invites",
+        href: pathsConfig.dashboard.user.invites,
+        icon: Icons.Link,
       },
     ],
   },