fix(ui): kill horizontal overflow in dialogs and cut the worst modal copy (#1732)

* fix(dialogs): kill horizontal overflow in dialogs and cut the worst modal copy

Overflow hardening:
- DialogTitle/DialogDescription and SheetTitle/SheetDescription get
  break-words at the primitive, so long unbroken interpolated strings
  (emails, product names, org numbers) can no longer widen any dialog.
- AccountCombobox's non-flat dropdown is portaled to document.body with
  viewport-clamped geometry (new pure helper account-combobox-position.ts,
  unit-tested), the same fix info-tooltip.tsx applies to TooltipContent:
  the 34rem panel inside a scrollable DialogContent was the root cause of
  sideways-scrolling dialogs. Outside-click checks the portaled node,
  position tracks scroll/resize (capture phase), wheel/touchmove stop at
  the panel so react-remove-scroll's modal lock cannot block its scrolling,
  and DialogContent/SheetContent treat data-dialog-companion nodes as
  inside interactions so clicking the panel never dismisses the dialog.
  The flat variant is unchanged.
- StrikeLinesDialog/CorrectionEntryDialog line rows switch bare 1fr grid
  tracks to minmax(0,1fr) and wrap the sm:contents-promoted AccountCombobox
  in a min-w-0 cell (SendInvoiceDialog's pattern).
- New dialog-overflow-risk ratchet in no-new-antipatterns.mjs: bare fr
  tracks in dialog hosts, whitespace-nowrap inside DialogContent regions
  outside an allowlist, and unportaled >=20rem overlays; baselined at the
  post-fix 7 files.

Copy reduction (convention 7, MatchVoucherDialog precedent):
- New shared RattelseExplainer (HelpPopover) carries the "a posted
  verifikat cannot be edited directly" framing once; CorrectionEntryDialog,
  StrikeLinesDialog, RecordateEntryDialog and CorrectMetadataDialog drop
  their permanent inline explainer boxes and keep at most one sentence
  inline (hardcoded Swedish: verifikat surface).
- SendInvoiceDialog keeps the actual addresses inline and moves the fixed
  CC/BCC framing plus the extra-address rules behind a HelpPopover
  (recipient_additional_hint replaced by recipient_help_fixed and
  recipient_help_additional in both messages files).
- HelpPopover panels gain pointer-events-auto and the companion marker so
  they are actually interactive inside modal dialogs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(bookkeeping): mechanism-accurate rattelse copy and calmer dropdown repositioning

The shared RattelseExplainer claimed every rattelse is logged with who/when
in the verifikat's rattelsehistorik, which is only true for the inline
strike-and-replace track (StrikeLinesDialog, CorrectMetadataDialog). The
storno dialogs (CorrectionEntryDialog, RecordateEntryDialog) never write
that log: their BFL 5 kap 5 trail is the storno chain. The shared component
now keeps only the universally true framing sentence, and each dialog's
popover carries the trail sentence matching its own mechanism.

AccountCombobox's capture-phase scroll/resize handler now skips setState
when the recomputed position is shallow-equal to the current one
(isSameDropdownPosition in the pure position helper, unit-tested) and
ignores scroll events originating inside the portaled panel itself, so
scrolling the account list no longer churns re-renders.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

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

DECISIONS.md

@@ -1085,3 +1085,4 @@ One line per decision: `[YYYY-MM-DD] <decision>: <why>`. Appended by agents and
 [2026-08-19] Bank reconciliation: ignored transactions are excluded from bank_transaction_total/difference (surfaced as separate count+sum) rather than keeping the old "what the bank moved" semantics: the ignore flag's dominant real-world use is feed duplicates (which never moved money and never get a ledger leg), so including them made is_reconciled unreachable after a correct dupe cleanup (observed: permanent 78 867 kr differens on a fully booked EF account). descriptionsBridge now strips ALL whitespace before the prefix compare (collapse-only still misses a dropped space); safe because char-filtering preserves prefix relations and the compare stays inside a (date,ore) bucket.
 [2026-08-19] Inline rättelse bank guard anchors to the linked bank amount, per account, not to the pre-state and not to the 19xx group net: a non-zero change on a 19xx/cash-ledger account is allowed iff the post-state net on that account equals the signed sum of the linked transactions resolved to it (once per transaction, split links by allocated_amount; NULL cash_account_id resolves to the primary cash account, then 1930). Per account rather than group so a wrong-bank-account booking (1930 vs 1940) stays a storno job: a group check would let the net drift between accounts and break per-account bank reconciliation. When no anchor resolves the old strict refusal stands. Reskontra sides (15xx/24xx) stay strictly net-preserving because their anchor is the payment row, not a bank amount.
 [2026-08-19] Import mapping step gets a bulk "Bekräfta alla föreslagna" for the VAT-treatment review gate, batching the per-row confirm semantics unchanged (defaults kept, rows marked reviewed): a Fortnox chart routinely puts 70+ class 3/4 accounts behind the gate and the one-click-per-row flow across 50-row pages was an observed live migration dead end (Boltonshield 2026-08-18, stuck at "50 kvar"). Rejected: auto-skipping review for accounts unused by the imported vouchers, because the chart rows are still created with the suggested treatment and a silently wrong default on a soon-used account is exactly what the review gate exists to catch.
+[2026-08-19] Dialog overflow hardening: Dialog/Sheet titles and descriptions get break-words at the primitive; AccountCombobox's non-flat dropdown is portaled to document.body with viewport-clamped geometry (same rationale as info-tooltip's TooltipContent portal, since DialogContent's overflow-y-auto otherwise grows a horizontal scrollbar around the 34rem panel); the four rattelse-family dialog explainers are unified behind one RattelseExplainer HelpPopover (convention 7, MatchVoucherDialog precedent) instead of four near-duplicate inline paragraphs; a dialog-overflow-risk ratchet in no-new-antipatterns.mjs keeps bare-1fr tracks, dialog whitespace-nowrap and unportaled wide overlays from coming back.