IX-835: Fix Tempo transfer fallback gas

[mnebliienko]

Summary

• default production API calls to https://api.inflowpay.ai
• keep production auth/dashboard calls on https://app.inflowpay.ai
• preserve explicit apiBaseUrl / INFLOW_BASE_URL behavior for local and custom environments

Root Cause

Production has split hosts: the API is served from api.inflowpay.ai, while dashboard and auth pages are served from app.inflowpay.ai. The CLI core resolver used app.inflowpay.ai as the production API default, so authenticated production commands would target the dashboard host unless callers supplied --base-url https://api.inflowpay.ai.

Validation

• corepack pnpm --filter @inflowpayai/inflow-core typecheck
• corepack pnpm --filter @inflowpayai/inflow-core test
• corepack pnpm --filter @inflowpayai/inflow-core lint
• corepack pnpm --filter @inflowpayai/inflow-core build
• corepack pnpm --filter @inflowpayai/inflow build
• git diff --check

Production Smoke

• inflow --environment production auth status --format json now reports apiBaseUrl: https://api.inflowpay.ai without URL overrides.
• Guarded no-auth production mpp pay still stops with NOT_AUTHENTICATED before creating a transaction.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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