Add per-project card statuses and a kanban board

Statuses
- Migration 006: card_statuses table (project-scoped) and cards.status_id, a
  nullable FK with ON DELETE SET NULL. Every new project is seeded with
  "To do" / "Doing" / "Done"; GET /api/projects/{id}/statuses lists them.
- New cards have no status -- they sit in an "inbox" until moved.

Project view
- Full-width and tabbed: "All tasks" (a flat list, sorted by name
  case-insensitively) and "Kanban" (Inbox plus one column per status).
- Drag a card within or between columns to reorder / restatus; the Inbox
  column has its own name + Add form.

Ordering
- Migration 007: `position` is now a dense 0..n-1 rank within a
  (project_id, status_id) column, not a project-wide order. New composite
  index idx_cards_project_status_position; existing rows re-ranked.
- PUT /api/projects/{id}/cards/order takes { status_id, card_ids } and sets one
  column's contents and order, re-parenting moved-in cards and re-packing their
  source column in a single transaction. PATCH status_id appends the card to the
  end of the destination column.

58 phpunit tests pass; the frontend type-checks and builds.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/Http/Controllers/ProjectController.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Http\Controllers;
 
 use App\Exception\ApiException;
+use App\Repository\CardStatusRepository;
 use App\Repository\ProjectRepository;
 use App\Support\Validator;
 use Psr\Http\Message\ResponseInterface as Response;
@@ -20,8 +21,10 @@ final class ProjectController extends Controller
     private const DESCRIPTION_MAX = 2000;
     private const MAX_PROJECTS_PER_OWNER = 100;
 
-    public function __construct(private readonly ProjectRepository $projects)
-    {
+    public function __construct(
+        private readonly ProjectRepository $projects,
+        private readonly CardStatusRepository $statuses,
+    ) {
     }
 
     /**
@@ -54,6 +57,7 @@ final class ProjectController extends Controller
         }
 
         $project = $this->projects->create($ownerId, $title, $description);
+        $this->statuses->seedDefaults($project['id']);
 
         return $this->json($response, ['project' => $this->present($project)], 201);
     }