feat(billing): make the expired-trial state visible with a clear upgrade path (#1725)

getCompanyEntitlements now derives an entitlementState (trial /
trial_expired / lapsed_subscription / paid / none) plus trialExpiredAt
from the grants it already fetches, reading company_subscriptions.status
inside the existing Promise.all so churned payers get 'abonnemang' copy
instead of 'provperiod'. The state threads through CompanyContext and the
dashboard layout.

Two new surfaces, both hidden in sandbox:
- SubscriptionTouchpoint replaces the sidebar trial pill: countdown while
  the trial runs, a persistent muted upgrade link to /settings/billing
  once it lapses (visible even collapsed, icon-only with aria-label), and
  the first mobile bottom-sheet touchpoint.
- TrialExpiredDialog: one-time on-entry notice with 'Se abonnemang' and a
  ghost dismiss; acknowledgement persists per user+company in
  user_preferences.ui_state.trial_expired_ack (read server-side, no
  flash), set on dismiss and click-through alike.

Narrows the 2026-07-11 'no trial-expired nag' decision at the founder's
direction after a user could not find the upgrade path at all; see
DECISIONS.md.

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

types/index.ts

@@ -145,6 +145,10 @@ export interface UserUiState {
   // re-clamps to the current viewport on read, so stale sizes from another
   // screen are safe.
   agent_panel?: AgentPanelState
+  // One-time expired-trial dialog acknowledgement, keyed per company
+  // (companyId -> ISO timestamp of the ack). Lives on the user so each
+  // member of a company sees the notice once.
+  trial_expired_ack?: Record<string, string>
 }
 
 export type AgentPanelMode = 'docked' | 'floating'