Fix/mobile tsconfig path aliases

[Davoski1]

Summary

Configure the mobile TypeScript project to use the same @/ path alias as the web wallet by mapping "@/*": ["./*"]. This makes imports consistent across mobile and web and prevents import/type errors when moving code between the apps.

Changes

• Update frontend/mobile/tsconfig.json:
  • Change "@/*" path mapping from ["./app/*"] to ["./*"].
  • Preserve existing "@/assets/*": ["./assets/*"] mapping.

Why

The web wallet uses "@/*": ["./*"], but the mobile app previously mapped @/* only to ./app/*. That made many @/... imports resolve differently on mobile vs web, causing type and resolution issues. Unifying the alias improves developer ergonomics and CI consistency.

Testing / Verification

• Run tsc --noEmit in the frontend/mobile workspace (or rely on CI) to verify no resolution/type errors.
• Build a development Expo run to ensure Metro/Babel resolves the alias as expected (Expo automatically respects path mappings when using a compatible Metro config or plugin).
  Closes 9. tsconfig + path aliases #437

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[Miracle656]

Please rebase onto main. app.config.ts has replaced app.json/app.config.js, and frontend/mobile/tsconfig.json + network.ts have both changed since this was opened. Rebase and re-scope the path-alias change to the current tsconfig.json, dropping the duplicate config file, and I'll re-review.

[Miracle656]

Thanks @Davoski1 — reviewed. Mixed after the config migration:

• The app.config.js addition is superseded — main now has app.config.ts (feat(mobile): register veil:// scheme and universal/app links #508).
• The rpId/origin env additions to frontend/wallet/lib/network.ts + the nextjs example are genuinely useful, but unrelated to this PR's "tsconfig aliases" title.

Could you close this and open a focused PR for just the rpId/origin env support? It pairs well with the native passkey wiring that just landed in #594. If you still want the tsconfig @/* → ./* change, please confirm it doesn't break existing @/app/... imports and send it separately.