feat: invoice-inbox polish + SIE source voucher traceability (#299)

* fix: consolidate commit_journal_entry to single 4-arg signature

Replaces the phantom-overload drop migration with an idempotent consolidation
that leaves only the 4-arg-with-defaults signature, callable with either 2 or
4 named args. Fixes the "Could not choose the best candidate function"
ambiguity caused when the commit-metadata migration CREATE OR REPLACE'd a
4-arg version alongside the existing 2-arg one.

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

* feat: preserve SIE source voucher identity on journal entries

Adds source_voucher_series / source_voucher_number columns to journal_entries
so per-verifikat traceability survives the importer's skip-empty-voucher
logic. The SIE importer populates the original series/number even when
skipped vouchers cause gnubok's target numbering to drift from the source
file's sequence. Required for BFNAR 2013:2 kap 8 behandlingshistorik.

- Migration adds columns + partial index + extends immutability trigger
- importVouchers() records rawSeries/rawNumber per voucher
- JournalEntry type + test fixtures gain the new fields
- Bookkeeping detail page surfaces "Ursprungligt verifikat" when present

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

* feat: polish invoice-inbox workspace for production use

- Bedrock image fit: shrink images > 5 MB via sharp before Bedrock upload
  so HEIC/high-res phone photos don't fail with the 5 MB cap
- Swedish error mapping: toSwedishInboxError translates Bedrock /
  infrastructure errors to Swedish sentences stored in error_message
- History timeline endpoint (GET /items/:id/history) returns the
  processing_history events correlated to the inbox item
- Workspace UI: inline diagnostic timeline inside the convert dialog,
  same-email row grouping ("+N dokument" chip), inferred-VAT affordance
  with "needs review" signalling, Riksbanken exchange-rate prefill for
  foreign-currency invoices so the supplier-invoice create path populates
  *_sek audit columns

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

* feat: extend inbox-smart-match to supplier invoices

Both receipts and supplier invoices expose structurally identical match
anchors (date, amount, currency, counterparty name) so the matcher can
reuse the same narrowing + LLM prompt. Adds getMatchAnchors() as a shared
extractor across ReceiptExtractionResult / InvoiceExtractionResult, and
updates the event handlers to process supplier_invoice items alongside
receipts. LLM prompt re-phrased as "dokument" rather than "kvitto" and
loosened the date-window heuristic since invoice payments can lag behind
the invoice date by weeks.

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

* refactor: drop unused category selector from TransactionForm

The manual "Lägg till transaktion" dialog predates the current categorization
flow (SwipeCategorizationView, BatchCategorySelector, AI suggestions). The
category dropdown here never drove journal-entry creation — onSubmit fanned
it out to CreateTransactionInput.category, which is optional. Removes the
dropdown, the unused watch() hook, and the categories lookup table.

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

* fix(migrations): restore drop-phantom file and rebump timestamps

Supabase branch DB failed with PK violation on schema_migrations because
my two migrations collided with timestamps already on main:
  20260421120000 → journal_entries_with_related_rpc (PR #298)
  20260421130000 → drop_legacy_supplier_invoice_user_id_uniqueness (PR #296)

Rebumped to 20260421140000 and 20260421150000 so each migration has a
unique version (Supabase uses only the 14-digit prefix as the PK).

Also restored the 20260420130000_drop_phantom_commit_journal_entry_overload
migration I had deleted — CLAUDE.md rule #5 forbids modifying existing
migrations. My consolidate migration is still compatible: drop_phantom
drops the 4-arg overload (no-op where absent), then consolidate recreates
it with defaults.

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

* fix(inbox-smart-match): anchor invoices on dueDate with wider window

The original ±7d window around invoiceDate filtered out all real payments
for invoices with standard 30–60 day terms — the matcher would see zero
candidates before the LLM was called, making the supplier-invoice matcher
effectively dead.

New anchor selection:
- Receipts: receipt date ±7 days (unchanged; paid on the spot)
- Invoices with dueDate: dueDate ±14 days (covers early/late payments)
- Invoices without dueDate: invoiceDate -7/+45 days (covers 30-day terms)

MatchAnchors now carries windowDaysBefore/After so the window can vary per
document shape. Added three getMatchAnchors tests asserting window sizes.

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

---------

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

lib/import/__tests__/sie-import.test.ts

@@ -707,4 +707,56 @@ describe('importVouchers — per-voucher series preservation', () => {
     expect(bNumbers).toEqual([1, 2, 3])
     expect(cNumbers).toEqual([1, 2])
   })
+
+  it('preserves original source series/number on each imported entry, even across skipped vouchers', async () => {
+    const { supabase, journalEntryInserts } = buildCapturingSupabase()
+    // A2 is an empty voucher (no lines) — will be skipped. A1 and A3 survive.
+    // Gnubok assigns target numbers 1 and 2 (contiguous), but source_voucher_number
+    // must preserve the SIE originals (1 and 3) so traceability is not lost.
+    const parsed = makeParsedFile({
+      vouchers: [
+        makeVoucher('A', 1),
+        { ...makeVoucher('A', 2), lines: [] },
+        makeVoucher('A', 3),
+      ],
+    })
+
+    const result = await importVouchers(
+      supabase,
+      'company-1',
+      'user-1',
+      'period-1',
+      parsed,
+      baseMap,
+      'A',
+    )
+
+    expect(result.created).toBe(2)
+    expect(result.skippedEmpty).toBe(1)
+    expect(journalEntryInserts.map((r) => r.voucher_number)).toEqual([1, 2])
+    expect(journalEntryInserts.map((r) => r.source_voucher_series)).toEqual(['A', 'A'])
+    expect(journalEntryInserts.map((r) => r.source_voucher_number)).toEqual([1, 3])
+  })
+
+  it('stores NULL source series/number when the source voucher has no series (SIE4I subsystem import)', async () => {
+    const { supabase, journalEntryInserts } = buildCapturingSupabase()
+    const parsed = makeParsedFile({
+      vouchers: [
+        { ...makeVoucher('', 1) },
+      ],
+    })
+
+    await importVouchers(
+      supabase,
+      'company-1',
+      'user-1',
+      'period-1',
+      parsed,
+      baseMap,
+      'V',
+    )
+
+    expect(journalEntryInserts[0].source_voucher_series).toBeNull()
+    expect(journalEntryInserts[0].source_voucher_number).toBe(1)
+  })
 })