feat(cortex): add Intake Blocks MVP for voice/text commands

Adds 4 new intents for intake workflow:
- intake_status: shows completion percentage and section checklist
- intake_navigeer: navigation to specific intake tabs
- risico_query: displays risk assessments with severity indicators
- diagnose_query: shows primary/secondary diagnoses

New components:
- IntakeStatusBlock, RisicoBlock, DiagnoseBlock
- Shared block components (BlockLoading, BlockError, BlockEmpty, BlockSection, BlockItem, BlockFooter)
- useBlockData and useIntakeContext hooks

New API routes:
- GET /api/cortex/intake/status
- GET /api/cortex/intake/risico
- GET /api/cortex/intake/diagnose

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

components/cortex/shared/block-section.tsx

@@ -0,0 +1,62 @@
+'use client';
+
+/**
+ * BlockSection Component
+ *
+ * Groups related content within a Cortex block with a header.
+ *
+ * Epic: E1.S1 - Block Layout
+ */
+
+import type { ReactNode } from 'react';
+import type { LucideIcon } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+interface BlockSectionProps {
+  /** Icoon component */
+  icon: LucideIcon;
+  /** Tailwind kleur class voor icoon */
+  iconColor?: string;
+  /** Sectie titel */
+  title: string;
+  /** Optionele count badge */
+  count?: number;
+  /** Sectie inhoud */
+  children: ReactNode;
+  /** Extra CSS classes */
+  className?: string;
+}
+
+/**
+ * Section wrapper for Cortex blocks.
+ * Shows icon + title header with optional count, wraps children content.
+ */
+export function BlockSection({
+  icon: Icon,
+  iconColor = 'text-slate-600',
+  title,
+  count,
+  children,
+  className,
+}: BlockSectionProps) {
+  return (
+    <section
+      className={cn(
+        'bg-white rounded-lg border border-slate-200 p-4',
+        className
+      )}
+    >
+      {/* Header */}
+      <div className="flex items-center gap-2 mb-3">
+        <Icon className={cn('h-4 w-4', iconColor)} />
+        <h3 className="text-sm font-medium text-slate-700">{title}</h3>
+        {count !== undefined && (
+          <span className="text-xs text-slate-500">({count})</span>
+        )}
+      </div>
+
+      {/* Content */}
+      {children}
+    </section>
+  );
+}