* refactor(shared): move terminal-billing wire types to @hermes/shared
The billing/subscription wire shapes (plus UsageBarData/UsageModelData,
which they reference) move verbatim from ui-tui/src/gatewayTypes.ts into
apps/shared/src/billing-types.ts so the desktop app can share the same
gateway contract. gatewayTypes.ts re-exports every moved name from the
new @hermes/shared/billing subpath, so no ui-tui consumer changes.
The subpath export keeps DOM-less ui-tui from pulling the barrel (whose
WebSocket helpers need the DOM lib). ui-tui also now declares its
@hermes/shared dependency explicitly instead of relying on workspace
hoisting.
* test(cli): pin nous_billing wire-layer status-to-exception mapping
The HTTP layer's error handling had zero coverage through _request:
only 2xx parsing and request shaping were tested, and the mapping cases
in test_remote_spending_gate_contract.py hit _raise_for_error directly.
Adds 19 tests driving _request via a monkeypatched urlopen: the
401-refresh-retry path (success, terminal plain/session_revoked,
idempotency-key preservation, base re-resolution), 403 variants through
the wire, 429/503 retry-after, non-JSON error bodies, 404/502
fallbacks, and URLError normalization.
Two behaviors are pinned as findings rather than fixed: a JSON-body
retryAfter hint is ignored unless the Retry-After header is present,
and a bare socket.timeout propagates uncaught (real urllib wraps
timeouts in URLError before this layer).
* fix(cli): normalize read-phase timeouts to the typed billing error
urlopen wraps connect-phase timeouts in URLError (already mapped to
network_error), but a timeout during resp.read() raises a bare
TimeoutError that escaped the typed-BillingError contract and reached
callers as an unhandled exception. Catch it narrowly and normalize.
The boundary test now asserts normalization instead of documenting the
leak.
* fix(shared): stop typing mutation success payloads as error payloads
BillingMutationResponse.payload was declared BillingErrorPayload, but on
ok:true the gateway passes through the raw NAS success body (rail,
changeType, cancelAtPeriodEnd, ...). The TUI never reads it so nothing
broke, but the shared contract now feeds the desktop app too — widen the
field deliberately and document both shapes.
* feat(shared): typed billing refusal and charge-failure unions
- BillingRefusalCode covers every code the gateway serializes today, with a
(string & {}) arm so unknown future codes (the NAS W3 card-health family)
stay assignable — consumers keep their unknown-code fallback.
- ChargeFailureReason models the four NAS terminal reasons plus the raw
subscription_payment_intent_requires_action code NAS leaks pre-#711.
- billing.state now carries the server-derived can_change_plan the gateway
emits; capability comments updated (canChangePlan is capability-based, not
an OWNER/ADMIN role gate).
* feat(shared): closed Known* halves for the refusal and charge-failure unions
- KnownBillingRefusalCode / KnownChargeFailureReason are closed literal sets,
so classification tables, copy maps and tests can be Record-exhaustive and
break at compile time when a code is added but not mapped. The wire types
keep the (string & {}) open arm for unknown future codes.
- Add network_error (client-originated transport code the gateway already
serializes) to the known set.
- Export the union types from the root barrel alongside the other billing
names.
* feat(shared): canonical billing refusal policy and charge-settlement driver
- billing-policy.ts: one exhaustive Record<KnownBillingRefusalCode,
BillingRefusalPolicy> classifying every known code (recovery kind,
mid-poll ambiguity, idempotency-key reuse) with a documented unknown-code
fallback. Surfaces keep their own copy; the behavior classification now
has a single home that breaks the build when a new code goes unmapped.
- charge-settlement.ts: the settlement poll state machine (2s cadence,
5-minute cap, bounded retry-after backoff, ambiguous-on-revocation) as a
pure dependency-injected driver returning a discriminated outcome.
- The TUI's pollCharge becomes a thin renderer over the shared driver —
byte-identical output, and the desktop poller can now share the same
machine instead of a drifting copy.
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