chore(onboarding): delete the dead first-run components and their orphaned strings (#1488)

The activation analysis (2026-08-07) verified these have zero importers or
triggers; the new stepped checklist and its PostHog funnel replaced their
roles:

- SuccessAnimation (confetti variant): never mounted, and the completion
  moment is now the quiet check-morph signature, so it will stay unused
- AgentSetupBanner, ConsultantEmptyState: never mounted
- EmptyReceipts + its Camera import: only consumer of the preset_receipts_*
  strings and of a /receipts/scan route that does not exist
- new_user_checklist i18n namespace (24 keys x 2 locales): the old wizard
  copy; the live checklist reads initial_setup

The onboarding.empty agent intent stays: it is registered in the intent
table and reachable via /api/agent/invoke, so removing it is a product
decision, not dead-code removal.

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/dashboard/AgentSetupBanner.tsx

@@ -1,38 +0,0 @@
-import Link from 'next/link'
-import { MessageCircle, ArrowRight } from 'lucide-react'
-import { Badge } from '@/components/ui/badge'
-
-interface Props {
-  companyName: string
-}
-
-// Renders above the dashboard when the active company has no verified
-// agent_profile yet. Mounted from the dashboard server component which
-// already does the existence check, so this component itself doesn't fetch.
-//
-// Single CTA, no dismiss: building the agent is part of onboarding and
-// once verified it disappears on its own.
-export default function AgentSetupBanner({ companyName }: Props) {
-  return (
-    <Link
-      href="/onboarding/agent"
-      className="group block rounded-lg border border-border bg-card hover:bg-secondary/60 transition-colors duration-150 mb-8"
-    >
-      <div className="flex items-center gap-4 p-6">
-        <div className="flex h-10 w-10 items-center justify-center rounded-full bg-foreground text-background shrink-0">
-          <MessageCircle className="h-4 w-4" />
-        </div>
-        <div className="flex-1 min-w-0">
-          <div className="flex items-center gap-2">
-            <p className="font-display text-lg tracking-tight">Bygg din bokföringsassistent</p>
-            <Badge variant="secondary" className="uppercase tracking-wider">Beta</Badge>
-          </div>
-          <p className="text-sm text-muted-foreground mt-1">
-            Skräddarsy en hjälp som kan ditt företag: laddas på under en halv minut för {companyName}.
-          </p>
-        </div>
-        <ArrowRight className="h-4 w-4 text-muted-foreground group-hover:text-foreground transition-colors shrink-0" />
-      </div>
-    </Link>
-  )
-}

components/dashboard/ConsultantEmptyState.tsx

@@ -1,44 +0,0 @@
-'use client'
-
-import Link from 'next/link'
-import { Building2, Plus } from 'lucide-react'
-
-interface ConsultantEmptyStateProps {
-  firstName?: string | null
-}
-
-export default function ConsultantEmptyState({ firstName }: ConsultantEmptyStateProps) {
-  const hour = new Date().getHours()
-  const greeting = hour < 5 ? 'God natt' : hour < 10 ? 'Godmorgon' : hour < 14 ? 'Hej' : hour < 18 ? 'God eftermiddag' : 'God kväll'
-
-  return (
-    <div className="stagger-enter">
-      <header className="mb-16">
-        <h1 className="font-display text-2xl leading-8 tracking-tight">
-          {greeting}{firstName ? `, ${firstName}` : ''}
-        </h1>
-      </header>
-
-      <div className="flex flex-col items-center text-center max-w-md mx-auto">
-        <div className="w-12 h-12 rounded-xl bg-muted/60 flex items-center justify-center mb-5">
-          <Building2 className="h-5 w-5 text-muted-foreground" />
-        </div>
-
-        <h2 className="font-display text-lg mb-2">
-          Inga företag ännu
-        </h2>
-        <p className="text-sm text-muted-foreground mb-8">
-          Lägg till ditt första kundföretag för att komma igång med bokföringen.
-        </p>
-
-        <Link
-          href="/onboarding"
-          className="inline-flex items-center gap-2 px-4 py-2 rounded-lg bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors"
-        >
-          <Plus className="h-4 w-4" />
-          Lägg till företag
-        </Link>
-      </div>
-    </div>
-  )
-}