chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers (#2150)

* chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers

Remove 33 dead files, ~270 unreferenced exports/types, 13 dead i18n
namespaces and 4 unused dependencies; fold byte-identical helper copies
into one canonical home each (lib/utils chunk/sleep/utcDateStamp,
lib/dates/iso, lib/invariants/uuid, lib/xml/escape, lib/reports/sru/format,
lib/pdf/number-text, lib/browser/panel-request, lib/api/v1/body +
v1ValidationError rolled out to ~55 v1 routes, booking-template schemas).

No behaviour change: v1 bodies and status codes, MCP tool schemas, DB
writes and money math are untouched. Naive ore rounding was deliberately
not swapped for roundOre; see DECISIONS.md 2026-09-02 for the full list
of things left alone on purpose.

tsc, lint, 19588 unit tests and check:guards green; antipattern baseline
ratcheted (naive-ore-round 622 -> 620, hand-rolled-invariant 115 -> 113).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* test(transactions): import RawTransaction from @/types after the ingest re-export removal

CI's type ratchet (check:types, full tsconfig) caught the one test file
that still imported the type through lib/transactions/ingest.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

scripts/backfill-tax-deadlines.ts

@@ -4,7 +4,7 @@
  *
  * Root cause (bug): tax deadlines only ever regenerated when a tax-relevant
  * settings field CHANGED value (app/api/settings/route.ts, gated on
- * didTaxFieldsChange). Companies fill these fields once at onboarding, so a
+ * the since-removed didTaxFieldsChange). Companies fill these fields once at onboarding, so a
  * later save changed nothing and generated nothing. The annual cron
  * (generateNewYearDeadlines) is the only unconditional trigger and runs Jan 2,
  * so the installed base sat empty. Result before this backfill: only ~5 of ~776

scripts/checks/antipatterns-baseline.json

@@ -7,10 +7,10 @@
     ]
   },
   "naiveOreRound": {
-    "count": 622
+    "count": 620
   },
   "handRolledInvariants": {
-    "count": 115
+    "count": 113
   },
   "ledgerScanningReports": {
     "count": 4,

scripts/checks/no-new-antipatterns.mjs

@@ -547,8 +547,6 @@ function findFoldedPublicFlags() {
 // Files whose whitespace-nowrap cells are fixed-width numeric/tabular columns
 // living inside their OWN overflow-x-auto scroll container, so they cannot
 // widen the dialog itself:
-// - MockDataImportDialog: CSV preview built on the Table primitive, which
-//   self-wraps in overflow-auto (components/ui/table.tsx).
 // - PaymentFileDialog: payment-line table wrapped in an overflow-x-auto div.
 // 11. direct-ai-client. Every model call goes through the job-shaped service
 // in lib/ai (getAiService): that is what lets hosted stay on Bedrock while a
@@ -596,7 +594,6 @@ function findDirectAiClients() {
 }
 
 const DIALOG_NOWRAP_ALLOWED = new Set([
-  'components/extensions/shared/MockDataImportDialog.tsx',
   'components/supplier-invoices/PaymentFileDialog.tsx',
 ])