feat(swift): E0 Setup & Foundation + documentatie

Swift - Contextual UI EPD: "Van 12 klikken naar 1 zin"

Documentatie:
- PRD, FO, TO, UX specificaties
- Bouwplan met 6 epics, 27 stories (68 SP)
- Analyse en onderzoeksdocumenten

E0 Setup & Foundation:
- E0.S1: Zustand v5.0.9 geïnstalleerd
- E0.S2: Swift store met context, blocks, input state
- E0.S3: /epd/swift route met eigen layout (dark theme)
- E0.S4: Folder structuur components/swift/, lib/swift/

Components:
- CommandCenter (container)
- ContextBar (shift, patient)
- CommandInput (text + voice button)
- RecentStrip (laatste 5 acties)
- BlockContainer (wrapper voor blocks)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

components/swift/blocks/block-container.tsx

@@ -0,0 +1,50 @@
+'use client';
+
+/**
+ * Block Container
+ *
+ * Wrapper for ephemeral blocks with animation, close button, and sizing.
+ */
+
+import { ReactNode } from 'react';
+import { X } from 'lucide-react';
+import { useSwiftStore } from '@/stores/swift-store';
+import type { BlockSize } from '@/lib/swift/types';
+
+interface BlockContainerProps {
+  title: string;
+  size?: BlockSize;
+  children: ReactNode;
+}
+
+const SIZE_CLASSES: Record<BlockSize, string> = {
+  sm: 'max-w-sm',
+  md: 'max-w-md',
+  lg: 'max-w-2xl',
+  full: 'max-w-4xl',
+};
+
+export function BlockContainer({ title, size = 'md', children }: BlockContainerProps) {
+  const { closeBlock } = useSwiftStore();
+
+  return (
+    <div
+      className={`w-full ${SIZE_CLASSES[size]} bg-slate-800 rounded-xl border border-slate-700 shadow-2xl`}
+    >
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b border-slate-700">
+        <h2 className="text-lg font-medium text-white">{title}</h2>
+        <button
+          onClick={closeBlock}
+          className="p-1 rounded hover:bg-slate-700 text-slate-400 hover:text-white transition-colors"
+          title="Sluiten (Esc)"
+        >
+          <X size={20} />
+        </button>
+      </div>
+
+      {/* Content */}
+      <div className="p-4">{children}</div>
+    </div>
+  );
+}