[xz-dev]

Problem

The quota dashboard (`dashboard/quota`, `ProviderLimits`) ordered cards non-deterministically, so provider groups shuffled position on every quota refresh.

Root cause: `visibleConnections` re-sorted the entire flat connection list by status (critical → alert → ok → empty) then soonest reset, and `QuotaCardGrid` grouped providers by first-appearance order in that list. Each provider group's rendered position was therefore decided by whichever of its accounts happened to sort first. Since account status and reset times change on every refresh, the group order changed with them. A stale inline comment claimed `Provider order between groups is enforced separately via PROVIDER_ORDER`, but provider rank was not actually part of the comparator.

Fix

Mirror the `dashboard/providers` ordering rule (`providerPageUtils.ts::sortProviderEntriesByName`), where every sort level ends in a stable, data-independent tiebreak:

• Provider rank (`PROVIDER_ORDER`) is the outer sort key again, so each provider group keeps a fixed slot regardless of account status.
• Status / soonest-reset now only orders accounts inside their own group (the existing critical-first intent is preserved, scoped correctly).
• Added the providers-page deterministic tiebreaks — locale-aware label (`compareTr`), then provider key / email / id ASCII — so equal-status accounts and aliased providers (e.g. `xai-oauth`/`xao`, both rank 16) never shuffle.

Changes

• `utils.tsx`: new pure helpers `compareQuotaConnections()` and `compareProviderGroups()`.
• `index.tsx`: use them in `sortedConnections` and `visibleConnections`; the status+reset comparator now runs only as the in-group `accountCompare`.
• `QuotaCardGrid.tsx`: order provider group headers via `compareProviderGroups` instead of first-appearance.
• `tests/unit/quota-deterministic-order.test.ts`: 7 tests covering rank dominance over account status, in-group critical-first ordering, deterministic name/email/id tiebreak, unranked-provider label fallback, aliased-provider key tiebreak, and input-order independence.

Verification

• `node --import tsx/esm --test tests/unit/quota-deterministic-order.test.ts` → 7/7 pass
• `provider-columns.test.ts` + `provider-limits-provider-filter.test.ts` → 17/17 pass (no regression)
• ESLint clean on all touched files; Prettier formatted.
• `tsc --noEmit`: no new errors in touched files (the 2 `Property 'label'` errors in `index.tsx` are pre-existing on the base branch — verified by stashing).