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>

package.json

@@ -49,10 +49,8 @@
     "@supabase/ssr": "^0.12.1",
     "@supabase/supabase-js": "^2.110.1",
     "@tailwindcss/typography": "^0.5.20",
-    "@types/qrcode": "^1.5.6",
     "@upstash/ratelimit": "^2.0.8",
     "@upstash/redis": "^1.38.0",
-    "@use-gesture/react": "^10.3.1",
     "@vercel/speed-insights": "^2.0.0",
     "ai": "6.0.259",
     "class-variance-authority": "^0.7.1",
@@ -83,7 +81,6 @@
     "server-only": "^0.0.1",
     "sharp": "^0.35.3",
     "stripe": "^22.3.1",
-    "svix": "^1.85.0",
     "swr": "^2.4.2",
     "tailwind-merge": "^3.6.0",
     "web-push": "^3.6.7",
@@ -97,9 +94,9 @@
     "@types/node": "^20",
     "@types/nodemailer": "8.0.1",
     "@types/pg": "^8.20.0",
+    "@types/qrcode": "^1.5.6",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "@types/sharp": "^0.32.0",
     "@types/web-push": "^3.6.4",
     "dotenv": "^17.4.2",
     "eslint": "^9",
@@ -112,7 +109,6 @@
   },
   "overrides": {
     "html-to-text": "10.0.1",
-    "ws": "^8.21.0",
     "sharp": "^0.35.3",
     "postcss": "^8.5.18"
   }