fix: Reduce max pet name length

[pedronfigueiredo]

Description

Following up on #28560, reduce truncation length to 12 characters instead of 15 (see screenshots).

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/3630
Related: #28560

Manual testing steps

1. Trigger a new confirmation
2. Add a long petname, by clicking an address and writing it in the input field
3. The name should be truncated with an ellipsis.

Screenshots/Recordings

Before

Max 15 chars

After

Max 12 chars

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 [79cd7bc]

• 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, 7
  • 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 (1824 ± 101 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1578	2319	1827	204	98
		domContentLoaded	1569	2237	1789	198	95
		load	1577	2325	1824	211	101
		domInteractive	14	181	41	34	17
		backgroundConnect	10	85	40	25	12
		firstReactRender	63	198	113	36	17
		getState	5	78	17	18	9
		initialActions	0	1	0	0	0
		loadScripts	1139	1698	1319	158	76
		setupStore	6	55	14	16	8
		uiStartup	1785	2583	2044	231	111

Bundle size diffs

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

[metamaskbot]

Builds ready [96bf838]

• 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, 7
  • 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 (1764 ± 84 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	319	2283	1706	359	172
		domContentLoaded	1508	2199	1735	163	78
		load	1523	2289	1764	175	84
		domInteractive	14	48	29	9	4
		backgroundConnect	9	90	35	23	11
		firstReactRender	48	205	107	29	14
		getState	4	58	17	17	8
		initialActions	0	0	0	0	0
		loadScripts	1077	1589	1266	123	59
		setupStore	6	71	15	17	8
		uiStartup	1711	2535	1970	202	97

Bundle size diffs

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