Crof removed subscription request quotas and now returns null
requests_plan/usable_requests. Parse credits only and show the
dollar balance as the primary usage window.

Co-authored-by: Aanish Bhirud <baanish@users.noreply.github.com>

Co-authored-by: Aanish Bhirud <baanish@users.noreply.github.com>

Add a separate xai provider for xAI developer-platform billing from the
documented Management API (management key + team ID): prepaid credit
balance from /prepaid/balance (inverted ledger in string USD cents; a
200 without a parseable total is an error, never $0.00) and a 30-day
daily USD spend dashboard from /usage via the shared cost-history seam.
History is best-effort enrichment - its failure keeps the balance while
auth failures and cancellation escalate - and limitReached marks the
window "(partial)" with estimated confidence instead of exact. No
coupling to the Grok subscription provider. Covers descriptor, fetcher,
settings reader/store, registries, config projection, widget and CLI
switches, template icon with a Grok-distinctness test, docs, and
fixture-based tests on stubbed transports. Moves ProviderIdentitySnapshot
to its own file to hold the UsageFetcher length limit. (#1712)

The generic no-window providerCost fallback printed the prepaid balance
as "Cost: 7.4 / 0.0", presenting money remaining as spend against a
zero budget. Exclude xAI's balance-shaped providerCost from that
fallback and add a dedicated Balance + spend-window line to the CLI
text, card body, and card extras renderers, matching the Devin/MiMo
balance-line pattern. Flagged by Codex review on #2472.

Route xAI through cleanPlanName so the CLI plan badge shows
"Management API" instead of the .capitalized mangling "Management Api"
seen in live verification on #2472. Document that the balance is the
posted prepaid ledger: spend posts at billing-cycle close, so mid-cycle
the ledger balance exceeds the Console's live remaining credit by the
cycle's unposted spend, as confirmed on a real account.

…ded plan_family

StepFun runs two Step Plan billing models side by side after the 2026-06-18
upgrade (docs/zh/step-plan/upgrade-notice): the grandfathered Coding Plan meters
rolling 5-hour/weekly windows, while the current Token Plan meters a monthly
Credit pool via plan_credit_rate_limit (its rate windows come back as 0 with
reset_time "0").

isCreditPlan trusted plan_family == 2 first, so a windowed plan that ever
reported plan_family=2 (or any future family-id change) would route to the
credit renderer — dropping the real 5h/weekly windows and showing a bogus credit
balance. Classify by the shape the payload actually carries (a live window reset
time means Coding Plan; no window plus a Credit pool means Token Plan) and use
plan_family only as a tie-breaker for an otherwise-ambiguous payload.

Adds tests for the window-wins-over-family-id case and the ambiguous fallback.
Verified live against a Token Plan account (still renders the credit balance).

- Add CurrencyExchange service with cross-currency conversion via open.er-api.com
- 24h rate caching with hardcoded fallbacks for offline use
- UsageFormatter: smart conversion methods (auto-follow provider vs explicit currency)
- Settings: preferredCurrencyCode preference with Picker UI
- Thread preferredCurrency through providerCostSection, ampCreditsLine, sakanaPayAsYouGoSection
- Update MenuDescriptor, MenuCardView, MenuBarLayout cost paths
- Add zh-Hans localization for currency_auto
- Trigger rate fetch on app launch and settings change
- 43 tests pass including cross-currency conversion tests

- Fix line_length violations by extracting cost variables
- Fix multiline_parameters / multiline_arguments formatting
- Fix unused_closure_parameter by restructuring closures
- Fix function_body_length by extracting resolvePaceAndForecast helper
- Fix nested string interpolation causing parse errors

Credits-only Crof windows have no duration, so a $0 balance was treated
like a depleted session quota. Skip Crof in sessionQuotaWindow, cover
depletion/top-up in the transition tests, and add Linux credits-only
decoding proof.

Co-authored-by: Aanish Bhirud <baanish@users.noreply.github.com>

Only skip session-quota transitions when Crof has no secondary quota
window. Quota-backed Crof snapshots keep notification eligibility.

Co-authored-by: Aanish Bhirud <baanish@users.noreply.github.com>

…their own suite

…ation

Classify StepFun Coding vs Token Plan by payload shape, not a hard-coded plan_family

feat: multi-currency cost display with live exchange rates (Issue #2449)

Fix Claude scoped weekly pace

feat: add xAI platform billing provider

Fix Crof usage for PAYG credits-only API

…-tail-8ef86077-20260729

# Conflicts:
#	README.md
#	Scripts/check-site-locales.mjs
#	Sources/CodexBar/UsageStore+WidgetSnapshot.swift
#	Sources/CodexBarCore/Generated/CodexParserHash.generated.swift
#	Sources/CodexBarCore/UsageFetcher.swift
#	docs/cli-configuration.md
#	docs/configuration.md
#	docs/index.html
#	docs/llms.txt
#	docs/providers.md
#	docs/site-locales.mjs