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>

components/extensions/general/InvoiceInboxWorkspace.tsx

@@ -1353,18 +1353,8 @@ function OnboardingCard({
         </div>
         <p className={cn('text-muted-foreground', compact ? 'text-[11px]' : 'text-xs')}>
           Underlagen samlas här (från mail eller filuppladdning) och kan
-          matchas mot bankhändelser eller bokföras direkt.
-        </p>
-        <p className={cn('text-muted-foreground', compact ? 'text-[11px]' : 'text-xs')}>
-          Gratis under beta för Open-användare. Ingår senare i Pro-planen.{' '}
-          <a
-            href="https://www.gnubok.se/priser"
-            target="_blank"
-            rel="noopener noreferrer"
-            className="text-primary hover:underline"
-          >
-            Se priser →
-          </a>
+          matchas mot bankhändelser eller bokföras direkt. Inkorgen är alltid
+          gratis; AI-tolkning av underlag ingår i abonnemanget.
         </p>
       </div>