feat: upgrade to TypeScript 6.0.3, ES2022 target, and shared ts-config presets

[oliverlaz]

What & why

Upgrades every workspace to TypeScript 6.0.3 with target: ES2022, and removes tsconfig duplication via a new shared preset package. Enabling type-checking across the previously-unchecked packages also surfaced (and this PR fixes) a pre-existing bug in the core package's published type resolution plus a batch of latent type errors.

Changes

Shared config

• New private @stream-io/typescript-config workspace (configs/typescript-config/):
  • base.json — cross-cutting policy (ES2022 target, strict, interop, …)
  • library.json — full React Native library config (extends base)
• Core, the native/expo wrappers, and all 3 example apps extend these instead of duplicating compiler options. Example apps array-extend ["<framework base>", "@stream-io/typescript-config/base.json"].

TypeScript 6.0.3 / ES2022

• TS 6.0.3 in all 7 manifests; target: ES2022 everywhere.
• lib kept at ESNext — the SDK uses the ES2023 Array.prototype.toReversed().
• TS 6.0 no longer auto-includes @types/jest, so it's referenced explicitly from a test-only package/src/__tests__/jest-globals.d.ts (excluded from the published build).

Core publishing fix (consumer-facing)

• react-native-builder-bob emitted declarations under lib/typescript/src/ while package.json#types pointed at lib/typescript/index.d.ts — so TS consumers couldn't resolve the SDK's types via types. Added rootDir: "./src" so declarations emit flat to match types. This was also the root cause that blocked the wrappers/examples from resolving core's types.
• Exported PickImageOptions from the core entrypoint (defined+exported in native.ts but never surfaced from index).

Wrappers (stream-chat-react-native, stream-chat-expo)

• Added a typecheck script + tsconfig (they had neither). The dynamic optional-require shims relax noImplicitAny/strictNullChecks/unused checks (kept noImplicitReturns).
• Fixed real bugs: missing returns in shareImage, missing resizeMode/rate on the video shim, an inconsistent startRecording return shape.

Example apps

• Fixed ~60 pre-existing latent type errors unmasked by enabling typecheck: theme palette typing (the legacy flat colors palette, read via a local AppTheme cast — behavior-preserving), null-safety guards, and several SDK-API-drift fixes.

CI

• check-pr.yml now runs yarn typecheck across the whole workspace (core + 2 wrappers + 3 examples) instead of only the core package; the root typecheck aggregate includes the wrappers.

Verification

• yarn build ✅
• yarn typecheck (core + 2 wrappers + 3 examples) ✅ 0 errors
• yarn lint ✅

Notes for reviewers

• Commit type: filed as chore: (release-neutral). The core changes (flat types path + PickImageOptions export) are genuinely consumer-facing — if you want them shipped, retype as fix: to cut a patch.
• Wrapper strictness: strictNullChecks/noImplicitAny are relaxed only for the two wrapper packages (dynamic optional-dep shims), not for core.
• Example theming: the apps' custom colors palette was already inert for SDK theming (the SDK reads semantics/primitives, not theme.colors); this PR preserves that behavior. Migrating the palette to the token model to restore custom branding would be a separate enhancement.
• Did not run the full unit suite locally (the only core source change is the additive PickImageOptions export); CI runs test:coverage.

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
js_bundle_size	1894 KB	1894 KB	+134 B	🟢