feat(projects) : add per-project task statuses and split project detail into sub-pages

Move project detail from [id].vue to [id]/ directory with Kanban, Groups
and Statuses sub-pages. Add project filter on task statuses service and
drawer. Remove global statuses tab from admin.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/services/task-statuses.ts

@@ -10,6 +10,13 @@ export function useTaskStatusService() {
         return extractHydraMembers(data)
     }
 
+    async function getByProject(projectId: number): Promise<TaskStatus[]> {
+        const data = await api.get<HydraCollection<TaskStatus>>('/task_statuses', {
+            project: `/api/projects/${projectId}`,
+        })
+        return extractHydraMembers(data)
+    }
+
     async function create(payload: TaskStatusWrite): Promise<TaskStatus> {
         return api.post<TaskStatus>('/task_statuses', payload as Record<string, unknown>, {
             toastSuccessKey: 'taskStatuses.created',
@@ -28,5 +35,5 @@ export function useTaskStatusService() {
         })
     }
 
-    return { getAll, create, update, remove }
+    return { getAll, getByProject, create, update, remove }
 }