Fix/chrome pdf preview csp (#572)

* feat: add option to exclude year-end closing entries in SIE export and related reports

* delete docs

* fix: allow Chrome's PDF viewer in verifikat document preview

The /api/documents/:id/inline route shipped with
`object-src 'none'` in its CSP, which blocked Chrome's built-in PDF
viewer (it renders inline PDFs via an internal <embed>). Users on
Chrome saw "Det här innehållet har blockerats" when expanding a PDF
attachment in the bookkeeping view; Firefox (PDF.js) and Edge (own
viewer) were unaffected, and JPGs worked because <img> isn't subject
to object-src.

Drops the CSP for this route to the minimum needed for embeddability:
`frame-ancestors 'self'`. X-Content-Type-Options: nosniff plus the
fixed Content-Type from the handler already block MIME confusion;
X-Frame-Options: SAMEORIGIN + frame-ancestors still block clickjacking.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(auth): add webmail deep link to email confirmation screens

Mirrors Stripe's signup UX: after asking the user to verify their email,
detect their webmail provider from the domain and show a button that
opens the inbox in a new tab. Gmail gets a from:<sender> search
pre-populated; Outlook/Yahoo/iCloud/Proton open the inbox directly.
Unknown / custom domains fall back to the existing copy.

Sender address is configurable via NEXT_PUBLIC_BRANDING_AUTH_EMAIL_FROM
(default noreply@gnubok.se) so white-label installs can match their
Supabase Auth SMTP config.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(auth): unblock first-time password set for BankID users with MFA

Supabase rejects updateUser({password}) and mfa.unenroll with "AAL2 session
is required" whenever a TOTP factor is enrolled. BankID magic-link logins
produce AAL1, and middleware skips MFA enforcement for bankid_linked users,
so they had no path to AAL2 — leaving them unable to set a backup password
or disable MFA without going through the email-recovery escape hatch.

- /api/account/password: branch on app_metadata.has_password. First-time set
  writes via service.auth.admin.updateUserById (no existing credential to
  protect, AAL2 guard does not apply). Change-password keeps the user-session
  updateUser so AAL2 still fires for credential rotation.
- /mfa/verify: accept a safeReturnTo query param and route there after
  successful verify, so step-up flows can land back where they came from.
- SecuritySettings: detect the AAL2 error from both change-password and
  mfa.unenroll and redirect through /mfa/verify?returnTo=/settings/account
  instead of toasting a dead-end error.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Add tests and rounding utility for öre precision in bokslut calculations

- Implemented `roundOre` function for rounding SEK amounts to two decimal places, ensuring consistent monetary calculations.
- Introduced `ORE_TOLERANCE` constant for comparing rounded amounts, facilitating invariant checks in financial entries.
- Created comprehensive tests for `roundOre`, covering typical cases, edge cases, and idempotency.
- Added year-end invariants tests to verify database-level guarantees for closing entries, ensuring they balance to the öre and reject discrepancies.
- Developed end-to-end tests for the dispositions chain, validating the correctness of calculations across various scenarios.

* fix: update PDF rendering to remove Swish QR code generation and set default to disable Swish visibility

* fix: enhance security by rejecting data URIs in safeReturnTo function tests

* fix: improve rounding logic in roundOre function and add customer_type migration

* fix: add customer_type column to customers and enforce CHECK constraint

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/bookkeeping/engine.ts

@@ -11,11 +11,13 @@ import {
   JournalEntryNotBalancedError,
   JournalEntryNotFoundError,
 } from '@/lib/bookkeeping/errors'
+import { resolveDefaultSeriesForSource } from '@/lib/bookkeeping/voucher-series-resolver'
 import type {
   CreateJournalEntryInput,
   CreateJournalEntryLineInput,
   JournalEntry,
   JournalEntryLine,
+  JournalEntrySourceType,
 } from '@/types'
 
 const log = createLogger('bookkeeping.engine')
@@ -110,6 +112,37 @@ async function resolveAccountIds(
   return map
 }
 
+/**
+ * Resolve the default voucher_series for a given source_type from
+ * company_settings.default_voucher_series_per_source_type. Falls back to 'A'
+ * silently when the column isn't present (e.g. older DB snapshot in a test),
+ * the lookup fails, or the configured value is invalid.
+ *
+ * Only called when the caller of createDraftEntry omitted voucher_series.
+ * Explicit voucher_series in the input always wins.
+ */
+async function resolveSeriesFromSettings(
+  supabase: SupabaseClient,
+  companyId: string,
+  sourceType: JournalEntrySourceType,
+): Promise<string> {
+  try {
+    const { data, error } = await supabase
+      .from('company_settings')
+      .select('default_voucher_series_per_source_type')
+      .eq('company_id', companyId)
+      .maybeSingle()
+
+    if (error) return 'A'
+    return resolveDefaultSeriesForSource(
+      data as { default_voucher_series_per_source_type?: Record<string, string> | null } | null,
+      sourceType,
+    )
+  } catch {
+    return 'A'
+  }
+}
+
 /**
  * Find the fiscal period for a given date
  */
@@ -211,6 +244,12 @@ export async function createDraftEntry(
     throw new AccountsNotInChartError(missingAccounts)
   }
 
+  // Resolve voucher_series: explicit input wins; otherwise look up the
+  // per-source-type default from company_settings (falls back to 'A').
+  const resolvedSeries = input.voucher_series
+    ? input.voucher_series
+    : await resolveSeriesFromSettings(supabase, companyId, input.source_type)
+
   // Insert journal entry header as draft (voucher_number = 0, will be assigned on commit)
   const { data: entry, error: entryError } = await supabase
     .from('journal_entries')
@@ -219,7 +258,7 @@ export async function createDraftEntry(
       user_id: userId,
       fiscal_period_id: input.fiscal_period_id,
       voucher_number: 0,
-      voucher_series: input.voucher_series || 'A',
+      voucher_series: resolvedSeries,
       entry_date: input.entry_date,
       description: input.description,
       source_type: input.source_type,