ST-1241: Verwijder frontend todo-UI (page, component, navbar en marketing page) (#133)

* feat(cleanup): verwijder Todo's navlink en todo-referenties uit marketing page [cmotto5ia000nx3178lq6xk8d]

- nav-bar.tsx: Todo's navLink verwijderd; Ideas-link blijft staan
- app/page.tsx: /todos quick-access link, feature-entry en /api/todos API-doc verwijderd

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(cleanup): verwijder app/(app)/todos/ en components/todos/ [cmottjvzo000cx3172472cu4g]

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

app/(app)/todos/loading.tsx

@@ -1,19 +0,0 @@
-export default function Loading() {
-  return (
-    <div className="p-6 max-w-2xl mx-auto w-full animate-pulse">
-      <div className="h-6 w-20 bg-border rounded mb-6" />
-      <div className="flex gap-3 mb-4">
-        <div className="h-8 w-32 bg-border/50 rounded-lg" />
-        <div className="flex-1" />
-        <div className="h-8 w-8 bg-border/50 rounded-lg" />
-      </div>
-      <div className="rounded-xl border border-border overflow-hidden">
-        <div className="h-10 bg-border/30" />
-        {[1, 2, 3, 4, 5].map(i => (
-          <div key={i} className="h-12 border-t border-border bg-border/20" />
-        ))}
-      </div>
-      <div className="mt-4 h-24 bg-border/30 rounded-xl" />
-    </div>
-  )
-}

app/(app)/todos/page.tsx

@@ -1,47 +0,0 @@
-import { cookies } from 'next/headers'
-import { getIronSession } from 'iron-session'
-import { SessionData, sessionOptions } from '@/lib/session'
-import { prisma } from '@/lib/prisma'
-import { productAccessFilter } from '@/lib/product-access'
-import { TodoList } from '@/components/todos/todo-list'
-
-export default async function TodosPage() {
-  const session = await getIronSession<SessionData>(await cookies(), sessionOptions)
-
-  const todos = await prisma.todo.findMany({
-    where: { user_id: session.userId, archived: false },
-    orderBy: { created_at: 'asc' },
-    include: { product: { select: { name: true } } },
-  })
-
-  const products = await prisma.product.findMany({
-    where: { ...productAccessFilter(session.userId), archived: false },
-    orderBy: { name: 'asc' },
-    include: {
-      pbis: { orderBy: [{ priority: 'asc' }, { sort_order: 'asc' }], select: { id: true, title: true } },
-    },
-  })
-
-  return (
-    <div className="p-6 max-w-2xl mx-auto w-full">
-      <h1 className="text-xl font-medium text-foreground mb-6">Todo&apos;s</h1>
-      <TodoList
-        todos={todos.map(t => ({
-          id: t.id,
-          title: t.title,
-          description: t.description ?? null,
-          done: t.done,
-          created_at: t.created_at.toISOString(),
-          product_id: t.product_id ?? null,
-          product_name: t.product?.name ?? null,
-        }))}
-        products={products.map(p => ({
-          id: p.id,
-          name: p.name,
-          pbis: p.pbis,
-        }))}
-        isDemo={session.isDemo ?? false}
-      />
-    </div>
-  )
-}