chore: remove PORTFOLIO_VIEW feature flag

[vinnyhoward]

Description

This is a collective effort to clean up our codebase by removing old feature flags such as PORTFOLIO_VIEW

Changelog

CHANGELOG entry:null

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/MUL-1132

Manual testing steps

Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]

Screenshots/Recordings

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Before

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After

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Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Removes the PORTFOLIO_VIEW feature flag and related conditionals, making multi‑network/portfolio behavior the default across UI, selectors, polling, and tests, and cleans up env/CI config.

• Feature flag removal:
  • Delete isPortfolioViewEnabled usage across components, hooks, selectors, and tests; default to portfolio/multi‑network behavior.
• Behavioral simplifications:
  • Always set tokenNetworkFilter on network changes/additions.
  • Use multi‑chain swaps tokens and asset data by default (Asset, AssetDetails).
  • Poll across enabled EVM networks (or popular/all) based on GNS, removing portfolio checks (use*Polling hooks).
  • Simplify staking/earn views (unified logos; EarnTokenList gating only by lending flag).
• Selectors/Utils:
  • Simplify getChainIdsToPoll; remove portfolio gating in earn/tokens selectors.
  • Multichain balance hook always reports portfolio mode.
• Tests:
  • Remove mocks/branches for portfolio flag; update expectations for polling, token lists, snapshots, and flows.
• Config Cleanup:
  • Remove PORTFOLIO_VIEW env from .js.env.example, Bitrise, and Jest config.

^{Written by Cursor Bugbot for commit 73769b7. This will update automatically on new commits. Configure here.}

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 46.29630% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.91%. Comparing base (7d80805) to head (177ce9e).
⚠️ Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
app/components/Views/DetectedTokens/index.tsx	0.00%	12 Missing and 1 partial ⚠️
...mponents/Views/NetworkSelector/NetworkSelector.tsx	0.00%	5 Missing ⚠️
app/components/Nav/Main/index.js	0.00%	4 Missing ⚠️
app/components/Views/Wallet/index.tsx	84.61%	0 Missing and 2 partials ⚠️
...pp/components/hooks/useMultichainBalances/utils.ts	0.00%	2 Missing ⚠️
app/components/Views/AssetDetails/index.tsx	83.33%	0 Missing and 1 partial ⚠️
...Settings/NetworksSettings/NetworkSettings/index.js	75.00%	1 Missing ⚠️
...ponents/hooks/AssetPolling/use-polling-networks.ts	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21806      +/-   ##
==========================================
- Coverage   77.26%   76.91%   -0.36%     
==========================================
  Files        3746     3768      +22     
  Lines       94220    95415    +1195     
  Branches    18110    18491     +381     
==========================================
+ Hits        72798    73385     +587     
- Misses      16509    17028     +519     
- Partials     4913     5002      +89     

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[sonarqubecloud]

Quality Gate passed

Issues
11 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud