feat: Epic 1 completion - Marketing refactor met timeline en Bento Grid login

Epic 1 Stories (E1.S1 t/m E1.S6):

✨ E1.S1 - Verwijder EPD demo pagina
- Removed /epd route en credentials-box component
- Updated navigation: EPD Prototype → Login link
- Removed demo_users references from middleware en auth libs
- Cleaned up TypeScript errors in hero-section-2

✨ E1.S2 - Homepage vereenvoudigen
- Replaced lange manifesto (8000+ woorden) met statement section
- Added problem-solution-proof format (3 paragrafen)
- Removed comparison table, experiment CTA, manifesto content
- Timeline placeholder toegevoegd (completed in E1.S3)

✨ E1.S3 - Timeline component integreren
- Created BuildTimeline component (Aceternity UI pattern)
- Added timeline.json met 4 weken data (Week 1 completed)
- Features per week met icons, metrics, achievements
- Scroll-based animation met Framer Motion
- Responsive design (sticky titles, mobile/desktop layouts)

✨ E1.S4 - Timeline content structuur
- Structured JSON data in content/nl/timeline.json
- 15 Lucide icons voor feature types
- Week status badges (completed/in_progress/planned)
- Time savings display (< 5 sec vs 30 min)

✨ E1.S5 - Login pagina refactor
- Split-screen layout (60% features, 40% login)
- Teal gradient showcase met 4 feature cards
- Time savings badges per feature
- Responsive stack layout voor mobile
- Footer met AI Speedrun branding

✨ E1.S6 - Bento Grid showcase
- Replaced feature grid met Bento Grid layout
- Variable card sizes voor visual hierarchy (col-span-2, col-span-1)
- Dark slate background (from-slate-900)
- Gradient backgrounds per card (teal, amber, purple)
- Stats footer met 3 key metrics (90%+, < 5 sec, 4 weken)
- Hover animations en glassmorphism effects

🎨 Design System:
- Teal-first brand colors (#0D9488)
- Amber accents voor AI features (#F59E0B)
- Slate scale voor neutral colors
- WCAG AA compliant contrast

📦 Components:
- BuildTimeline (app/(marketing)/components)
- BentoGrid & BentoCard (components/ui)
- Button variants (components/ui)

📄 Content:
- timeline.json met volledige 4-weken data
- Features array per week
- Metrics en achievements tracking

🔧 Technical:
- Removed demo user scripts en migrations
- Updated middleware routes (removed /epd)
- TypeScript type fixes (hero-section-2, auth)
- Build succesvol: 13 routes generated

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

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

lib/types/client.ts

@@ -0,0 +1,59 @@
+/**
+ * Client Types
+ *
+ * Type definitions for client-related data structures
+ */
+
+import { Database } from '@/lib/database.types';
+
+// Base client type from database
+export type Client = Database['public']['Tables']['clients']['Row'];
+export type ClientInsert = Database['public']['Tables']['clients']['Insert'];
+export type ClientUpdate = Database['public']['Tables']['clients']['Update'];
+
+// Extended client type with computed fields
+export interface ClientWithAge extends Client {
+  age: number;
+  full_name: string;
+}
+
+// Client form data (for create/edit forms)
+export interface ClientFormData {
+  first_name: string;
+  last_name: string;
+  birth_date: string; // ISO date string (YYYY-MM-DD)
+}
+
+// Client list filters
+export interface ClientFilters {
+  search?: string;
+  sortBy?: 'name' | 'age' | 'created_at';
+  sortOrder?: 'asc' | 'desc';
+}
+
+/**
+ * Calculate age from birth date
+ */
+export function calculateAge(birthDate: string | Date): number {
+  const birth = typeof birthDate === 'string' ? new Date(birthDate) : birthDate;
+  const today = new Date();
+  let age = today.getFullYear() - birth.getFullYear();
+  const monthDiff = today.getMonth() - birth.getMonth();
+
+  if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birth.getDate())) {
+    age--;
+  }
+
+  return age;
+}
+
+/**
+ * Transform client to extended client with computed fields
+ */
+export function transformClient(client: Client): ClientWithAge {
+  return {
+    ...client,
+    age: calculateAge(client.birth_date),
+    full_name: `${client.first_name} ${client.last_name}`,
+  };
+}