/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/apps/officer-web/App.tsx

@@ -107,6 +107,7 @@ export function App() {
             {/* TEMPORARY / EXPERIMENTAL — offline file transfer over animated QR codes */}
             <Route path="/qr-transfer" element={<Dashboard.QrTransferScreen />} />
             <Route path="/sendoff" element={<Dashboard.SendOffScreen />} />
+            <Route path="/todos" element={<Dashboard.TodosScreen />} />
             <Route path="/activity" element={<Dashboard.ActivityScreen />} />
             <Route path="/activity/:id" element={<Dashboard.ActivityScreen />} />