perf(reference-data): sweep the remaining raw reads onto the session cache, ratchet to 0 (#1941)

Final consumer migration of the responsiveness plan: the 35 files still
fetching fiscal periods, settings, accounts, cash accounts, dimensions or
templates on their own now read lib/reference-data, and every client
write site invalidates the shared cache instead of refetching locally.

Settings and registries: FiscalYearsManager, FiscalPeriodEditor (period
snapshotted once per company so a revalidation cannot reset dates being
edited), BookingTemplatesPanel, ChartOfAccounts, ChartOfAccountsManager,
EditAccountDialog, CorrectionEntryDialog, StrikeLinesDialog,
InvoicePaymentAccountsSettings; the dimensions registry (DimensionsManager,
DimensionCombobox, LineDimensionFields, DimensionFilter, bookkeeping/[id])
reads useDimensions and the ad-hoc fetchDimensions/fetchDimensionsCached
helpers are deleted.

Pages and pickers: CashAccountSelector (FyPicker-shaped restore, once per
company load), use-account-names, FiscalYearGapNotice,
OpeningBalancePeriodStep, BankFileConfirmStep, ImportReviewStep, the import
page (invalidates accounts + periods after a SIE execute), customers list,
invoices list + detail, pending, salary employee, asset dispose, year-end
and periodisering pages (invalidate periods after closing), reports
DimensionPnlView (its pivot picker read the wrong payload key and was
always empty; it now populates), SkatteverketPanel, TemplatePicker,
ArticleForm (vat_registered).

Invoice dialogs and extensions: SendInvoiceDialog, PaymentBookingDialog
(init reduced to the credit-note lookup + catalogue, proposal and voucher
preview fire on open when cached; a local getSession replaces the network
getUser for the fallback CC), InvoiceInboxWorkspace, TicWorkspace,
ArcimMigrationWorkspace (invalidates after each SIE import step),
enable-banking AccountPickerDialog.

raw-reference-fetch ratchet: 35 -> 0 files.

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

components/articles/ArticleForm.tsx

@@ -1,7 +1,7 @@
 'use client'
 
 import { useEffect, useMemo, useState } from 'react'
-import { useAccounts } from '@/lib/reference-data/hooks'
+import { useAccounts, useCompanySettings } from '@/lib/reference-data/hooks'
 import { invalidateReferenceData } from '@/lib/reference-data/invalidate'
 import { useForm, Controller } from 'react-hook-form'
 import { zodResolver } from '@hookform/resolvers/zod'
@@ -19,7 +19,6 @@ import {
 import { ChevronDown, Loader2, Lock } from 'lucide-react'
 import { cn, formatCurrency } from '@/lib/utils'
 import { useCanWrite } from '@/lib/hooks/use-can-write'
-import { useCompany } from '@/contexts/CompanyContext'
 import { createClient } from '@/lib/supabase/client'
 import AccountCombobox from '@/components/bookkeeping/AccountCombobox'
 import { AddAccountDialog } from '@/components/bookkeeping/AddAccountDialog'
@@ -72,7 +71,6 @@ export default function ArticleForm({
   onCancel,
 }: ArticleFormProps) {
   const { canWrite } = useCanWrite()
-  const { company } = useCompany()
   const supabase = createClient()
   const t = useTranslations('form_article')
   const tCommon = useTranslations('common')
@@ -92,7 +90,11 @@ export default function ArticleForm({
   const [createAccountPrefill, setCreateAccountPrefill] = useState<string | null>(null)
   // Momsregistrerad? A non-VAT-registered company never charges moms, so the
   // VAT field is hidden and the rate forced to 0: mirrors the invoice editor.
-  const [vatRegistered, setVatRegistered] = useState(true)
+  // Icke momsregistrerad verksamhet: VAT controls hidden and lines at 0 %.
+  // Derived from the session-cached settings row (lib/reference-data); a
+  // missing column keeps the registered-company behaviour, as before.
+  const { settings: companySettings } = useCompanySettings()
+  const vatRegistered = typeof companySettings?.vat_registered === 'boolean' ? companySettings.vat_registered : true
   // Supported currencies, fetched from the currencies reference table rather
   // than hard-coded. Falls back to the article's own currency (or SEK) if the
   // fetch fails so the Select is never empty.
@@ -116,25 +118,6 @@ export default function ArticleForm({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [])
 
-  useEffect(() => {
-    if (!company?.id) return
-    let cancelled = false
-    supabase
-      .from('company_settings')
-      .select('vat_registered')
-      .eq('company_id', company.id)
-      .single()
-      .then(({ data }) => {
-        if (!cancelled && typeof data?.vat_registered === 'boolean') {
-          setVatRegistered(data.vat_registered)
-        }
-      })
-    return () => {
-      cancelled = true
-    }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [company?.id])
-
   // Open "Fler fält" by default when it already holds data, so an edit never
   // hides a value the user previously set. Currency and posting account are no
   // longer in here: both are permanent rows.