fix(entitlements): gate remaining paid-feature UI, drop stale beta pricing copy (#921)

* fix(entitlements): gate remaining paid-feature UI and drop stale beta pricing copy

Second post-cutover sweep. Non-payers still hit live controls that 403 at
the server gate, plus dead plan names in the inbox guide:

- document-inbox guide: remove "Gratis under beta för Open-användare /
  Pro-planen / Se priser" (plans that no longer exist); inbox stays free,
  AI extraction is pitched as part of the subscription
- payslip send button (RunProgressBar): disabled + tooltip without
  email_send; the free PDF download next to it is untouched
- skattekonto "Synkronisera nu": disabled + tooltip without skatteverket
- invoice post-create send-now dialog: skipped without email_send (the
  invoice page's SendInvoiceDialog carries the upsell)
- recurring-invoice auto_send checkbox: disabled + UpgradeNote without
  email_send, and force-unchecked so edit mode can't PATCH it back on
- AgentChat composer: replaced with UpgradeNote without ai, covering
  deep links to /chat/* and conversations opened before expiry
- /onboarding/agent server page: hasCapability(ai) redirect to
  /settings/billing before the gated composer stream starts

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(entitlements): address review findings on the gating sweep

- AgentChat: the mount effect auto-fired the first /api/agent/invoke on a
  fresh start regardless of capability; now returns early without ai, and
  Regenerate/Correction re-invokes are guarded too (real find by review bot)
- recurring auto_send upsell copy moved to i18n (auto_send_requires_subscription,
  sv+en) matching the rest of the dialog
- disabled-button tooltips wrapped in a span (payslip send + skattekonto
  sync): browsers suppress title on disabled elements

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

app/(dashboard)/skattekonto/page.tsx

@@ -27,6 +27,8 @@ import {
   Link2,
   RefreshCw,
 } from 'lucide-react'
+import { useCapability } from '@/contexts/CompanyContext'
+import { CAPABILITY } from '@/lib/entitlements/keys'
 import type {
   SkatteverketSaldoResponse,
   SkattekontoTransactionWithSuggestion,
@@ -60,6 +62,7 @@ interface MatchCandidate {
 
 export default function SkattekontoPage() {
   const { toast } = useToast()
+  const hasSkvCapability = useCapability(CAPABILITY.skatteverket)
   const [saldo, setSaldo] = useState<SaldoEnvelope | null>(null)
   const [tx, setTx] = useState<TransaktionerEnvelope['data'] | null>(null)
   const [loading, setLoading] = useState(true)
@@ -305,10 +308,13 @@ export default function SkattekontoPage() {
     <div className="space-y-6">
       <PageHeading
         right={
-          <Button onClick={syncNow} disabled={syncing}>
-            <RefreshCw className={`mr-2 h-4 w-4 ${syncing ? 'animate-spin' : ''}`} />
-            {syncing ? 'Synkroniserar…' : 'Synkronisera nu'}
-          </Button>
+          // The span carries the tooltip: `title` is suppressed on disabled elements.
+          <span title={!hasSkvCapability ? 'Synk mot Skatteverket kräver ett abonnemang' : undefined}>
+            <Button onClick={syncNow} disabled={syncing || !hasSkvCapability}>
+              <RefreshCw className={`mr-2 h-4 w-4 ${syncing ? 'animate-spin' : ''}`} />
+              {syncing ? 'Synkroniserar…' : 'Synkronisera nu'}
+            </Button>
+          </span>
         }
       />
 

app/(onboarding)/onboarding/agent/page.tsx

@@ -2,6 +2,8 @@ import { createClient } from '@/lib/supabase/server'
 import { redirect } from 'next/navigation'
 import { headers } from 'next/headers'
 import { getActiveCompanyId } from '@/lib/company/context'
+import { hasCapability } from '@/lib/entitlements/has-capability'
+import { CAPABILITY } from '@/lib/entitlements/keys'
 import { ensureTicSnapshot } from '@/lib/agent/composer/tic-fetch'
 import AgentOnboarding from '@/components/onboarding/agent/AgentOnboarding'
 
@@ -21,6 +23,13 @@ export default async function AgentOnboardingPage() {
   const companyId = await getActiveCompanyId(supabase, user.id)
   if (!companyId) redirect('/onboarding')
 
+  // Paywall: the build flow drives the gated composer stream (ai capability).
+  // Send non-payers to billing where the assistant is pitched, instead of a
+  // build sequence that 403s mid-stream.
+  if (!(await hasCapability(supabase, companyId, CAPABILITY.ai))) {
+    redirect('/settings/billing')
+  }
+
   // Everything that doesn't depend on the TIC snapshot loads in one batch:
   // the settings row (carrying the is_sandbox gate + the onboarding-form
   // data, moms_period, fiscal_year_start_month, f_skatt, city, …, that