Task 12: Build LastConsultation tile

Created LastConsultationTile.tsx displaying the most recent role:
- Full-width card with green dot header
- Info row: Date, Organisation, Type (employment), Band
- Role title in accent color
- Bullet list of key achievements from examination array
- Data sourced from consultations[0] (most recent)
- Styling matches ref-06 spec: 8px card radius, border-light,
  info labels 10px uppercase, values 11.5px 600 weight
- Integrated into DashboardLayout in proper sequence

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/DashboardLayout.tsx

@@ -5,6 +5,7 @@ import Sidebar from './Sidebar'
 import { PatientSummaryTile } from './tiles/PatientSummaryTile'
 import { LatestResultsTile } from './tiles/LatestResultsTile'
 import { CoreSkillsTile } from './tiles/CoreSkillsTile'
+import { LastConsultationTile } from './tiles/LastConsultationTile'
 
 const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches
 
@@ -103,7 +104,10 @@ export function DashboardLayout() {
             <LatestResultsTile />
             {/* CoreSkillsTile — half width (right) */}
             <CoreSkillsTile />
+
             {/* LastConsultationTile — full width */}
+            <LastConsultationTile />
+
             {/* CareerActivityTile — full width */}
             {/* EducationTile — full width */}
             {/* ProjectsTile — full width */}