fix: Permit ellipsis should use max 15 char

[digiwand]

Description

Display max 15 characters, not max 15 digits, before ellipsis for amounts shown in Permit pages. Updated to use shortenString here.

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/2845

Follow-up Cherry-picked PR: #26516

Manual testing steps

1. Go to test-dapp
2. Trigger Malicious Permit request
3. Observe ellipsis values in
   a. spending cap in simulation
   b. value in the message

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.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.11%. Comparing base (54b3237) to head (8e30f0a).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #26458      +/-   ##
===========================================
- Coverage    70.12%   70.11%   -0.02%     
===========================================
  Files         1428     1428              
  Lines        50103    50074      -29     
  Branches     13896    13891       -5     
===========================================
- Hits         35133    35105      -28     
+ Misses       14970    14969       -1     

☔ View full report in Codecov by Sentry.
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[metamaskbot]

Builds ready [8e30f0a]

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

Page Load Metrics (102 ± 25 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	79	407	136	69	33
		domContentLoaded	11	104	39	24	11
		load	50	307	102	53	25
		domInteractive	11	104	39	24	11

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 243 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[jpuri]

Changes look good 👍