fix(assessments): enable engine by default and wire into live UI

The assessment engine was built but opt-in and hidden: flag defaulted
off, no sidebar entry, and no settings toggle. Default assessments_engine
on, auto-seed catalog when empty, add Settings toggle and Assessments
nav, and surface guidance from the patients list.

resources/views/care/settings/edit.blade.php

@@ -89,6 +89,21 @@
             @endif
 
             @if ($canManage)
+                <x-settings.card title="Clinical assessments" description="Layered intake, disease pathways (stroke, diabetes, COPD, …), scoring instruments, and outcome tracking on consultations and patient charts.">
+                    <label class="flex items-start gap-3 text-sm">
+                        <input type="checkbox" name="assessments_engine" value="1"
+                               @checked(old('assessments_engine', $assessmentsEngineEnabled ?? true))
+                               class="mt-0.5 rounded border-slate-300">
+                        <span>
+                            <span class="font-medium text-slate-800">Enable clinical assessments engine</span>
+                            <span class="mt-0.5 block text-xs text-slate-500">
+                                Shows universal intake, pathway suggestions, and disease forms on consultations.
+                                Open a patient → consultation (Queue) or patient chart → Assessments / Pathways / Outcomes.
+                            </span>
+                        </span>
+                    </label>
+                </x-settings.card>
+
                 <x-settings.card title="Messaging" description="Patient email and SMS use suite messaging by default — no Bird or SMS API keys required.">
                     <p class="text-sm text-slate-600">
                         Set a Ladill mailbox (From address) and optional SMS sender ID under Account → Messaging.