fix(ci): fix broken workflows and add complete env var reference - #1

…m WASM build

- package.json: add workspaces field so npm install at root populates
  packages/api-schemas/node_modules and zod is resolvable (fixes TS2307
  across primitives.ts, requests.ts, responses.ts, vault.ts)

- packages/api-schemas/src/primitives.ts: explicit string type on
  .refine() callback param (line 26); explicit string|number->string on
  .transform() callback (line 42) — fixes TS7006 noImplicitAny

- packages/api-schemas/src/requests.ts: explicit inline type on .refine()
  query param (line 51) — fixes TS7006 noImplicitAny

- frontend/src/pages/Portfolio.tsx: add missing locale dep to columns
  useMemo (used by formatNumber/formatPercent in cell renderers); stabilise
  useUrlState options in a useRef so defaultSortBy is not a recreated
  object on every render — fixes react-hooks/exhaustive-deps warnings

- rust-toolchain.toml: pin Rust to 1.82.0 + wasm32-unknown-unknown target.
  ethnum 1.5.2 (transitive via soroban-env-common 22.1.3) uses a
  const_transmute from a zero-size type that ICEs on Rust >=1.83; 1.82.0
  is the newest stable compatible with soroban-sdk 22 + ethnum 1.5.2

…t scope