Add personal dashboard flow and per-component website selection

This introduces a user-scoped dashboard with board-style view/edit pages while keeping it unavailable in team context, and moves website targeting to component config so dashboard components can each select their own website.

public/intl/messages/en-US.json

@@ -98,7 +98,6 @@
     "download": "Download",
     "dropoff": "Dropoff",
     "edit": "Edit",
-    "edit-dashboard": "Edit dashboard",
     "edit-member": "Edit member",
     "email": "Email",
     "enable-share-url": "Enable share URL",
@@ -351,6 +350,7 @@
     "delete-team-warning": "Deleting a team will also delete all team websites.",
     "delete-website-warning": "All website data will be deleted.",
     "error": "Something went wrong.",
+    "empty-dashboard": "Your dashboard is empty. Click Edit to add your first component.",
     "event-log": "<b>{event}</b> on <a>{url}</a>",
     "forbidden": "Forbidden",
     "go-to-settings": "Go to settings",