cherrypick fix: xchain linea bugs (#29409)

[infiniteflower]

Description

This PR cherry picks 481505f into 12.10.0 RC.

This fixes the bug: #29591

This PR fixes a couple of issues and does the following:

1. Shows a loading spinner on the Bridge button after submitting
2. Does not wait 5 sec to submit a bridge tx on Linea if there is no approval tx

Related issues

Fixes:

Manual testing steps

Gas token

1. Start a bridge from Linea to any chain for ETH
2. Observe that you are redirected to Activity page almost instantly

ERC20

1. Start a bridge from Linea to any chain for an ERC20
2. Observe that a loading spinner shows on the button
3. Observe you are redirected to Activity page after 5 sec

Screenshots/Recordings

Before

After

Screen.Recording.2024-12-20.at.4.08.00.PM.mov

Screen.Recording.2024-12-20.at.4.08.39.PM.mov

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension 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.

Description

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension 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.

[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.

[metamaskbot]

Builds ready [4617582]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6
  • common: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1885 ± 75 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	298	2192	1732	492	236
		domContentLoaded	1531	2176	1842	157	75
		load	1541	2198	1885	157	75
		domInteractive	26	128	57	30	15
		backgroundConnect	8	90	43	28	13
		firstReactRender	16	78	40	23	11
		getState	5	61	16	12	6
		initialActions	0	1	0	0	0
		loadScripts	1147	1658	1382	144	69
		setupStore	7	60	23	21	10
		uiStartup	1768	2506	2133	178	85

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 2.04 KiB (0.04%)
• ui: -879 Bytes (-0.01%)
• common: 646 Bytes (0.01%)

[dbrans]

@danjm – This diff matches the cherry-picked commit diff. Diff is small and change appears low-risk.