Land on account overview and import hosted sites.

Route launcher and home hub entry to the account overview instead of the
control panel, label the sidebar app launcher, and extend hosting:import
to sync hosted_sites with platform_id matching for existing accounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/HostingAccount.php

@@ -35,6 +35,7 @@ class HostingAccount extends Model
     public const GRACE_PERIOD_MONTHS = 3;
 
     protected $fillable = [
+        'platform_id',
         'user_id',
         'hosting_product_id',
         'hosting_node_id',