Replace unchecked as-any casts in admin, backup, search, and transactions modules

Labels / Complexity: bug · Medium Complexity — Medium

Problem

Four modules carry the heaviest as any usage in the repo (verified by grep): src/admin/ (15), src/search/ (15), src/backup/ (12), and src/transactions/ (12). Each cast erases a type check at exactly the point where the code meets Prisma models, request payloads, or provider responses — the surfaces most likely to drift from their declared types. When the runtime shape changes, the cast compiles and the mismatch surfaces as a confusing runtime failure.

• The casts hide contract drift. A Prisma model field renamed or a provider response reshaped compiles fine through as any and breaks at runtime.
• They defeat the strict config. The repo runs tsconfig.json strict; these casts are the deliberate holes in it, independent of the @ts-nocheck directives (Remove // @ts-nocheck from all source files and fix underlying type errors #890).

Why this is architecturally hard

1. Each cast needs the real type. The fix is replacing as any with the actual Prisma/generated type or a locally defined shape; for provider responses that means declaring the external contract explicitly.
2. The four modules differ. Admin (service/controller types), search (query shapes), backup (status unions), and transactions (Prisma unions) each need their own type strategy; slicing per module keeps PRs reviewable.
3. Some casts mask genuine union problems. Where the underlying types disagree, the fix is a type refactor, not a narrower cast — that is the design work of the issue.

Acceptance criteria

• All as any casts in the four named modules are replaced with real types or locally declared shapes.
• npx tsc --noEmit passes with strict unchanged; npm test passes with no behavior change.
• The PR description reports the repository-wide as any count before and after.

Out of scope

as any in other modules; the @ts-nocheck migrations (#890).

Getting started

• grep -rn "as any" src/admin src/search src/backup src/transactions --include=*.ts — the sites
• src/types/prisma.types.ts — the Prisma-generated types to use

Commands: npx tsc --noEmit, npm test.

Good first files to read: src/backup/backup.service.ts (status unions), src/types/prisma.types.ts.