[needs-vps] feat(dashboard): add per-operator quota row visibility on usage tab (#7251)

* feat(dashboard): add per-operator quota row visibility on usage tab

Adds a "hide this quota row" action (visibility_off icon button) to
each model-quota row on the provider limits card, and a "Hidden: …"
strip at the bottom of the card to restore any hidden row. The
visibility preference is keyed per-provider (settings.quotaVisibility)
and persisted via PATCH /api/settings, so it survives refresh/reload.

Distinct from the existing model-catalog isHidden/isDeleted mechanism
(collectHiddenQuotaModelIds/filterHiddenModelQuotas in
ProviderLimits/utils.tsx), which hides rows the ADMIN marked hidden in
the model catalog. This is a personal dashboard preference an operator
can toggle without touching the catalog — e.g. temporarily decluttering
a quota card with many low-signal rows.

New pure helpers (getQuotaVisibilityKey, filterQuotasByVisibility,
getHiddenQuotaRows) live in ProviderLimits/utils.tsx and are unit
tested directly; the settings key is added to DEFAULT_SETTINGS and
validated via updateSettingsSchema like the existing
providerStrategies field. New UI strings are filled in en.json and
synced to the other 42 locales as `__MISSING__` placeholders.

Co-authored-by: nguyenha935 <208228297+nguyenha935@users.noreply.github.com>
Inspired-by: https://github.com/decolua/9router/pull/2371

* chore(changelog): fragment for #7251

* refactor(usage): extract useQuotaVisibility hook (file-size budget)

ProviderLimits/index.tsx grew past its frozen 1127-line budget with the
quota-visibility wiring; extract the state + persistence + hide/show handlers
into a dedicated hook (same pattern as useCodexResetCreditRedemption).
No behavior change — the live validation evidence on the PR covers this flow
end-to-end.

Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

* refactor(dashboard): shed QuotaCard complexity to baseline + type useQuotaVisibility settings fetch (#7251 CI green)

* test(dashboard): rename quota-row visibility test (path claimed by #7360)

* fix(dashboard): restore providerTierField case-collision fix dropped by merge auto-resolve

The git merge of origin/release/v3.8.49 auto-resolved providerTierFieldApi.ts
(added post-merge-base by commit 3ba3cd145e to fix a case-only filename
collision with ProviderTierField.tsx that breaks webpack on case-insensitive
filesystems) back down to its pre-fix name providerTierField.ts, silently
reverting that base-red fix and dropping its stryker tap.testFiles
registration and changelog fragment. Restore all four: the renamed helper
file, the import path in ProviderTierField.tsx, the import path in
tests/unit/provider-tier-field-helpers.test.ts, and the
combo-skip-conn-disable-plugin-block-7806.test.ts stryker registration.

---------

Co-authored-by: nguyenha935 <208228297+nguyenha935@users.noreply.github.com>

src/shared/validation/settingsSchemas.ts

@@ -218,6 +218,12 @@ export const updateSettingsSchema = z.object({
     .optional(),
   // #6168: global session-stickiness opt-out (per-combo config overrides this).
   disableSessionStickiness: z.boolean().optional(),
+  /**
+   * Per-operator quota row visibility on the usage dashboard, keyed by
+   * provider id. Independent of the model catalog's isHidden/isDeleted flags.
+   * Ported from upstream decolua/9router#2371.
+   */
+  quotaVisibility: z.record(z.string().trim().min(1), z.object({ hidden: z.array(z.string()).max(500).optional() })).optional(),
   requestRetry: z.number().int().min(0).max(10).optional(),
   maxRetryIntervalSec: z.number().int().min(0).max(300).optional(),
   maxBodySizeMb: z