feat(export): direct download of the complete archive from the Exportera tab (#1632)

The full-archive ZIP endpoint (SIE + reports + all documents) has existed
since the settings/backup page, but lost its UI when that page became a
redirect: the BackupDownloadForm component was orphaned and the download
was API-only. Resurface it the way the export tab already works: a
"Komplett arkiv" ImportRow (owner/admin only, matching the route's role
gate) opening a small centered dialog like the SIE export next to it,
with scope choice, fiscal-year picker, include-documents toggle, live
size estimate, 413 handling, and a #full-archive deep link.

The orphaned form and its dead settings_backup_download i18n namespace
are deleted; its logic lives on in components/import/FullArchiveDialog.
Over-limit copy now points at the existing cloud sync instead of
promising it "in a later version".

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

DECISIONS.md

@@ -1022,3 +1022,4 @@ One line per decision: `[YYYY-MM-DD] <decision>: <why>`. Appended by agents and
 [2026-08-16] /transactions FyPicker double-fetch fixed by gating the initial fetch on FyPicker's existing onReady (fires after its restore onChange) instead of the analysis doc's literal "read the persisted period synchronously in initial state": localStorage only holds the period ID, not the FiscalPeriod bounds, so a synchronous read would suppress FyPicker's restore (value !== null) and leave the fetch permanently unscoped while the chip claimed a year. Same outcome (one scoped fetch per mount, background refetch on period change) without a stale-bounds cache or new FyPicker API.
 [2026-08-16] Row exit animation for dry-table <tr> rows collapses via td padding/line-height/font-size transitions plus a numeric max-height (.row-collapsible) on the fixed-height cell spans, not grid-template-rows 0fr (the AttGoraSection pattern): table cells cannot host the grid wrapper without restructuring every td, and max-height needs a numeric rest value because auto/none does not interpolate. prefers-reduced-motion hides the exiting row instantly (display: none) while the 350ms timer does the state cleanup.
 [2026-08-16] Restyled QuickReviewDialog's inbox-picker trigger to the same full-width dropzone-footer row as TransactionBookingDialog even though it did not share the orphan-button layout: both surfaces come from #1620 and should present the same underlag affordance; the alternative (leaving a small outline button in one dialog and a footer row in the other) would split the visual language of one control. Presentation only, disabled-while-booking kept (PR #1628).
+[2026-08-17] Full-archive direct download resurfaced as an ImportRow + small centered dialog on /import's Exportera tab (row "Komplett arkiv", hash #full-archive), not by re-mounting the orphaned components/settings/BackupDownloadForm.tsx: the form was pre-frame card styling with a duplicate cloud-backup section, while the export tab's existing SIE dialog sets the house pattern (ImportRow -> sm:max-w-md dialog). Its logic (estimate, 413 handling, last-download stamp) ported into components/import/FullArchiveDialog.tsx; the orphan and its dead settings_backup_download i18n namespace deleted. The dialog reuses FiscalYearSelector despite design.md's "legacy, no new uses" line: FyPicker is a toolbar context chip, and the SIE dialog in the same file already uses FiscalYearSelector for the identical dialog-form slot, so matching it beats introducing a third pattern. Row gated to owner/admin because GET /api/reports/full-archive enforces that role server-side; showing members a download that can only 403 helps nobody.