## Explanation

Release `1039.0.0` with a minor version bump for:

- **`@metamask/transaction-pay-controller`** `23.5.1` → `23.6.0`

### `@metamask/transaction-pay-controller@23.6.0`

#### Added
- Add direct mUSD fiat injection flow for Money Account deposits behind
`useFiatMUSDQuoteToInjectForMoneyAccount` feature flag. When enabled,
probes fiat providers for mUSD on Monad availability and, if viable,
purchases mUSD directly to the Money Account, skipping the ETH-to-mUSD
bridge. Falls back to the existing flow when no provider supports the
direct route. Also moves `fiatPayment.caipAssetId` assignment into fiat
quote functions so the asset ID always matches the quote that succeeded.
([MetaMask#9080](MetaMask#9080))
- Make fiat order polling interval and timeout remotely configurable via
`confirmations_pay_fiat.orderPollIntervalMs` and
`confirmations_pay_fiat.orderPollTimeoutMs` feature flags
([MetaMask#9090](MetaMask#9090))

#### Changed
- Bump `@metamask/utils` from `^11.9.0` to `^11.11.0`
([MetaMask#9074](MetaMask#9074))
- Bump `@metamask/assets-controller` from `^9.0.0` to `^9.0.1`
([MetaMask#9083](MetaMask#9083))
- Bump `@metamask/controller-utils` from `^12.1.1` to `^12.2.0`
([MetaMask#9083](MetaMask#9083))
- Bump `@metamask/transaction-controller` from `^67.1.0` to `^68.0.0`
([MetaMask#9089](MetaMask#9089))
- Bump `@metamask/ramps-controller` from `^14.1.1` to `^14.2.0`
([MetaMask#9105](MetaMask#9105))

#### Fixed
- Clear stale `fiatPayment.rampsQuote` when a fiat quote fetch fails,
preventing the "No quotes" alert from being silently suppressed after a
prior successful fetch
([MetaMask#9073](MetaMask#9073))

### Dependency updates

No downstream dependents — no additional changelog entries needed.

## References

- [MetaMask#9080](MetaMask#9080) — Direct mUSD fiat
injection flow
- [MetaMask#9090](MetaMask#9090) — Configurable
fiat order polling
- [MetaMask#9074](MetaMask#9074) — Bump
@metamask/utils
- [MetaMask#9083](MetaMask#9083) — Bump
assets-controller, controller-utils
- [MetaMask#9089](MetaMask#9089) — Bump
transaction-controller
- [MetaMask#9105](MetaMask#9105) — Bump
ramps-controller
- [MetaMask#9073](MetaMask#9073) — Fix stale
fiatPayment.rampsQuote

## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [x] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> The PR only changes version numbers and changelog text; behavioral
risk depends on the already-merged 23.6.0 features, not on new code in
this diff.
> 
> **Overview**
> Cuts **release 1039.0.0** by bumping the monorepo from `1038.0.0` to
`1039.0.0` and publishing **`@metamask/transaction-pay-controller`**
**`23.5.1` → `23.6.0`**.
> 
> The package changelog is finalized for **23.6.0** (new `[23.6.0]`
section, compare links updated); the diff does not include
implementation changes—only version metadata and release notes for work
already merged (direct mUSD fiat injection behind a flag, remote fiat
order polling config, dependency bumps, stale `fiatPayment.rampsQuote`
fix).
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
1387422. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->