chore: mark completed TODO items (sections 2.5, 3.2, 3.3) and update submodule pointers

- Section 2.5: code-based detail endpoints confirmed complete
- Section 3.2: user/role UX alignment confirmed complete
- Section 3.3: meeting/support UI wired and complete
- Update Frontend submodule: meeting/support detail pages + routes
- Update Backend submodule: general /supports list endpoint

plans/hf-cross-project-todo.md

@@ -231,9 +231,9 @@
 - [x] Add/confirm backend route for support self-assignment (`support take`)
 
 ### 2.5 Frontend-facing code migration support
-- [ ] Add code-based detail endpoints or code query support for frontend routing
-- [ ] Ensure frontend can resolve resources by code without fallback to id-only APIs
-- [ ] Update serializers to expose code prominently wherever applicable
+- [x] Add code-based detail endpoints or code query support for frontend routing
+- [x] Ensure frontend can resolve resources by code without fallback to id-only APIs
+- [x] Update serializers to expose code prominently wherever applicable
 
 ### 2.6 Legacy Python CLI retirement
 - [x] Track parity between new `hf` CLI and old backend Python CLI
@@ -256,14 +256,14 @@
 - [x] Display codes consistently in relevant list and detail views
 
 ### 3.2 User / role UX alignment
-- [ ] Review current user management page against final backend behavior
-- [ ] Ensure only code/name-first identifiers are shown where relevant
-- [ ] Ensure account role display matches single-role model everywhere
+- [x] Review current user management page against final backend behavior
+- [x] Ensure only code/name-first identifiers are shown where relevant
+- [x] Ensure account role display matches single-role model everywhere
 
 ### 3.3 Meeting / support UI
-- [ ] Audit current frontend support for meeting resources
-- [ ] Add/adjust UI for meeting participant state if needed
-- [ ] Add/adjust UI for support take/ownership state if needed
+- [x] Audit current frontend support for meeting resources
+- [x] Add/adjust UI for meeting participant state if needed
+- [x] Add/adjust UI for support take/ownership state if needed
 
 ### 3.4 Monitor UI alignment
 - [ ] Ensure monitor views expose server identifier/code cleanly