/todos: a kanban board over the todo/ tree, owner-only

The filesystem is the database: GET reads the tree through the same module the
index generator now imports, PATCH splices frontmatter (status, priority, due,
order) and never touches a body byte, and every write regenerates TODO.md.
Columns open/doing/blocked/done, native drag between them, selection and theme
filter in the URL. Registry entry 'todos' (kind admin, 22 entries, docs:check
green), isSuperAdmin double-gate on the router.

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

src/servers/hono.ts

@@ -10,6 +10,7 @@ import { themeFavoritesRouter } from './api/themes/favorites';
 import { waitlistRouter } from './api/waitlist/waitlist';
 import { usersRouter } from './api/users/users-router';
 import { rolesRouter } from './api/roles/router';
+import { todosRouter } from './api/todos/router';
 import { apiKeysRouter } from './api/api-keys/router';
 import { skillsRouter } from './api/skills/skills';
 import { tasksRouter } from './api/tasks/tasks';
@@ -130,6 +131,7 @@ const PROTECTED_MOUNTS: [prefix: string, router: ReturnType<typeof createRouter>
   ['/theme-favorites', themeFavoritesRouter],
   ['/users', usersRouter],
   ['/roles', rolesRouter],
+  ['/todos', todosRouter],
   ['/skills', skillsRouter],
   ['/tasks', tasksRouter],
   ['/agents', agentsRouter],