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/views/portal_accessibility_templates.xml

@@ -388,6 +388,7 @@
                         <small class="text-muted">Determines which sale order / funding workflow this case enters.</small>
                     </div>
                 </div>
+                <input type="hidden" name="visit_id" id="acc_visit_id"/>
             </div>
         </div>
     </template>
@@ -647,6 +648,15 @@
             // Fallback if Google Maps not loaded
             window.initAddressAutocomplete = window.initAddressAutocomplete || function() {};
             
+            // Carry visit_id from the workspace launch (?visit_id=) into the form
+            (function() {
+                var _vid = new URLSearchParams(window.location.search).get('visit_id');
+                if (_vid) {
+                    var f = document.getElementById('acc_visit_id');
+                    if (f) { f.value = _vid; }
+                }
+            })();
+
             // Form submission
             function saveAssessment(createSaleOrder) {
                 var form = document.getElementById('accessibility_form');