chore(earn): type Earn navigators with feature param lists (Phase 3) (#33291)

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## **Description**

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**Phase 3 of the incremental React Navigation typing migration — Earn
feature.**

Earn’s nested navigators (`EarnScreens` / `EarnModals`) were loosely
typed (`EarnScreensParams` / `NestedNavigationParams`), so nested
`navigate(container, { screen, params })` calls could not be checked
against real screen param shapes. This PR introduces feature-level param
lists and wires them into the Earn navigators and `RootStackParamList`,
following the same pattern used for Perps / Rewards / Predict / Card.

This is **types-only** — no intentional runtime navigation behavior
change.

### What changed
**Feature param lists (`app/components/UI/Earn/types/navigation.ts`)**
- `EarnScreensStackParamList` — screen stack (`EarnScreenStack`):
lending deposit/withdrawal confirmation, mUSD conversion education,
redesigned confirmations
- `EarnModalsNavigationParamList` — modal stack (`EarnModalStack`):
lending max withdrawal, lending learn more, redesigned confirmations
- `EarnNavigationParamList` — feature union + nested `EarnScreens` /
`EarnModals` entries
- `RedesignedConfirmations` typed as `ConfirmationParams | undefined`

**Navigators (`app/components/UI/Earn/routes/index.tsx`)**
- `createNativeStackNavigator<EarnScreensStackParamList>()` for
`EarnScreenStack`
- `createNativeStackNavigator<EarnModalsNavigationParamList>()` for
`EarnModalStack`

**Root stack (`app/core/NavigationService/types.ts`)**
- `EarnScreens` → `NavigatorScreenParams<EarnScreensStackParamList>`
- `EarnModals` → `NavigatorScreenParams<EarnModalsNavigationParamList>`
- Leaf Earn routes now reference the feature param lists

**Cleanup**
- Removed unused loose `EarnScreensParams` from `Earn.types.ts`


## **Changelog**

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CHANGELOG entry:null

## **Related issues**

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Fixes: https://consensyssoftware.atlassian.net/browse/MCWP-674

## **Manual testing steps**
N/A

## **Screenshots/Recordings**

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N/A

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- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
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Not required for external contributors.

#### Performance checks (if applicable)

- [ ] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [ ] I've tested with a power user scenario
- Use these [power-user
SRPs](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/edit-v2/401401446401?draftShareId=9d77e1e1-4bdc-4be1-9ebb-ccd916988d93)
to import wallets with many accounts and tokens
- [ ] I've instrumented key operations with Sentry traces for production
performance metrics
- See [`trace()`](/app/util/trace.ts) for usage and
[`addToken`](/app/components/Views/AddAsset/components/AddCustomToken/AddCustomToken.tsx#L274)
for an example

For performance guidelines and tooling, see the [Performance
Guide](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/400085549067/Performance+Guide+for+Engineers).

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Types-only refactor with no runtime navigation changes; risk is
limited to possible TypeScript breakage at navigate call sites.
> 
> **Overview**
> **Phase 3** of the React Navigation typing migration for Earn: nested
`EarnScreens` / `EarnModals` stacks now use dedicated param lists
instead of loose `EarnScreensParams` and generic nested params.
> 
> A new `app/components/UI/Earn/types/navigation.ts` defines
`EarnScreensStackParamList`, `EarnModalsNavigationParamList`, and
`EarnNavigationParamList`, wiring lending confirmation, mUSD education,
max withdrawal, learn more, and `RedesignedConfirmations` to their
existing param types. `EarnScreenStack` and `EarnModalStack` pass these
types into `createNativeStackNavigator`, and `RootStackParamList` uses
`NavigatorScreenParams<>` for nested entry routes while leaf Earn routes
alias the feature lists. Unused `EarnScreensParams` is removed from
`Earn.types.ts`.
> 
> No intentional runtime navigation changes—compile-time safety only,
aligned with Perps / Rewards / Predict / Card.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
0e20dec. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: weitingsun

app/components/UI/Earn/Earn.types.ts

@@ -48,14 +48,6 @@ export interface GasImpactModalParams {
   chainId: string;
 }
 
-/** Earn screens parameters */
-export interface EarnScreensParams {
-  screen?: string;
-  params?: {
-    token?: Record<string, unknown>;
-  };
-}
-
 /**
  * Lending deposit confirmation parameters
  * Matches LendingDepositViewRouteParams in EarnLendingDepositConfirmationView

app/components/UI/Earn/routes/index.tsx

@@ -12,9 +12,13 @@ import {
   clearNativeStackNavigatorOptions,
   transparentModalScreenOptions,
 } from '../../../../constants/navigation/clearStackNavigatorOptions';
+import type {
+  EarnModalsNavigationParamList,
+  EarnScreensStackParamList,
+} from '../types/navigation';
 
-const Stack = createNativeStackNavigator();
-const ModalStack = createNativeStackNavigator();
+const Stack = createNativeStackNavigator<EarnScreensStackParamList>();
+const ModalStack = createNativeStackNavigator<EarnModalsNavigationParamList>();
 
 const EarnScreenStack = () => {
   const emptyNavHeaderOptions = useEmptyNavHeaderForConfirmations();

app/components/UI/Earn/types/navigation.ts

@@ -0,0 +1,48 @@
+import type { NavigatorScreenParams } from '@react-navigation/native';
+import type { ConfirmationParams } from '../../../Views/confirmations/components/confirm/confirm-component';
+import type { EarnMusdConversionEducationViewRouteParams } from '../Views/EarnMusdConversionEducationView';
+import type {
+  LendingDepositConfirmationParams,
+  LendingMaxWithdrawalModalParams,
+  LendingWithdrawalConfirmationParams,
+} from '../Earn.types';
+
+/**
+ * Param list for screens inside the Earn screen stack (`EarnScreenStack`).
+ */
+// ParamListBase requires `type`; `interface` cannot satisfy it.
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export type EarnScreensStackParamList = {
+  EarnLendingDepositConfirmation: LendingDepositConfirmationParams | undefined;
+  EarnLendingWithdrawalConfirmation:
+    | LendingWithdrawalConfirmationParams
+    | undefined;
+  EarnMusdConversionEducation:
+    | EarnMusdConversionEducationViewRouteParams
+    | undefined;
+  RedesignedConfirmations: ConfirmationParams | undefined;
+};
+
+/**
+ * Param list for screens inside the Earn modal stack (`EarnModalStack`).
+ */
+// ParamListBase requires `type`; `interface` cannot satisfy it.
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export type EarnModalsNavigationParamList = {
+  EarnLendingMaxWithdrawalModal: LendingMaxWithdrawalModalParams | undefined;
+  EarnLendingLearnMoreModal: undefined;
+  RedesignedConfirmations: ConfirmationParams | undefined;
+};
+
+/**
+ * Feature-level Earn navigation params for nested `EarnScreens` / `EarnModals` entry.
+ */
+// Intersection (`&`) requires `type`; `interface` cannot express this.
+// eslint-disable-next-line @typescript-eslint/consistent-type-definitions
+export type EarnNavigationParamList = EarnScreensStackParamList &
+  EarnModalsNavigationParamList & {
+    EarnScreens: NavigatorScreenParams<EarnScreensStackParamList> | undefined;
+    EarnModals:
+      | NavigatorScreenParams<EarnModalsNavigationParamList>
+      | undefined;
+  };

app/core/NavigationService/types.ts

@@ -216,13 +216,12 @@ import type {
   LearnMoreModalParams,
   MaxInputModalParams,
   GasImpactModalParams,
-  EarnScreensParams,
-  LendingDepositConfirmationParams,
-  LendingWithdrawalConfirmationParams,
-  LendingMaxWithdrawalModalParams,
 } from '../../components/UI/Earn/Earn.types';
 import type { EarnTokenListViewRouteParams } from '../../components/UI/Earn/components/EarnTokenList';
-import type { EarnMusdConversionEducationViewRouteParams } from '../../components/UI/Earn/Views/EarnMusdConversionEducationView';
+import type {
+  EarnModalsNavigationParamList,
+  EarnScreensStackParamList,
+} from '../../components/UI/Earn/types/navigation';
 
 // Modal params
 import type {
@@ -857,17 +856,13 @@ export type RootStackParamList = {
   EarnTokenList: EarnTokenListViewRouteParams | undefined;
 
   // Earn routes
-  EarnScreens: EarnScreensParams | undefined;
-  EarnLendingDepositConfirmation: LendingDepositConfirmationParams | undefined;
-  EarnLendingWithdrawalConfirmation:
-    | LendingWithdrawalConfirmationParams
-    | undefined;
-  EarnMusdConversionEducation:
-    | EarnMusdConversionEducationViewRouteParams
-    | undefined;
-  EarnModals: NestedNavigationParams | undefined;
-  EarnLendingMaxWithdrawalModal: LendingMaxWithdrawalModalParams | undefined;
-  EarnLendingLearnMoreModal: undefined;
+  EarnScreens: NavigatorScreenParams<EarnScreensStackParamList> | undefined;
+  EarnLendingDepositConfirmation: EarnScreensStackParamList['EarnLendingDepositConfirmation'];
+  EarnLendingWithdrawalConfirmation: EarnScreensStackParamList['EarnLendingWithdrawalConfirmation'];
+  EarnMusdConversionEducation: EarnScreensStackParamList['EarnMusdConversionEducation'];
+  EarnModals: NavigatorScreenParams<EarnModalsNavigationParamList> | undefined;
+  EarnLendingMaxWithdrawalModal: EarnModalsNavigationParamList['EarnLendingMaxWithdrawalModal'];
+  EarnLendingLearnMoreModal: EarnModalsNavigationParamList['EarnLendingLearnMoreModal'];
 
   // Full screen confirmation routes
   RedesignedConfirmations: undefined;