feat(fusion_portal): Phase 3 - assessment visit workspace (accessibility path)

Adds the portal workspace: /my/visit/new starts a visit; /my/visit/<id> shows the
add-as-you-go workspace (add buttons -> existing forms carrying ?visit_id, a
deferred client+funding form, and a Complete button). Accessibility forms launched
from a visit save as a DRAFT linked to it (JS carries visit_id into the form; the
controller captures it and skips the per-assessment SO) - the VISIT completion then
creates the grouped per-funding sale orders.

NOT YET: express/ADP form visit-linking, email consolidation, polished tablet UI.
Untested locally (Enterprise dep) - clone verification pending.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_portal/__manifest__.py

@@ -81,6 +81,7 @@ This module provides external portal access for:
         'views/portal_technician_templates.xml',
         'views/portal_book_assessment.xml',
         'views/portal_page11_sign_templates.xml',
+        'views/portal_visit.xml',
     ],
     'assets': {
         'web.assets_backend': [