Remove envelope icon from admin email field in agentic UI

[shaunandrews]

Related issues

• Fixes STU-2039

How AI was used in this PR

Written entirely with Claude Code: it traced the icon to the DataViews email edit control, made the change, and verified it in the running local UI (studio ui + dev:local) in both color schemes, including confirming email validation still fires. Screenshots below were captured during that verification.

Proposed Changes

The admin email field in the agentic UI (site creation and site settings) rendered with an envelope icon inside the input. The icon comes from DataViews' built-in email edit control, and it has two problems: it doesn't adapt to dark mode (a dark icon on a dark input, so it reads as a smudge), and it adds nothing — the field is already labeled "Admin email". The field now renders as a plain input, matching every other text field in the form. Email-format validation is unchanged, since it comes from the field's email type rather than the edit control.

	Before	After
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(Screenshots live on the throwaway stu-2039-screenshots branch — safe to delete after merge.)

Testing Instructions

1. Run the agentic UI (e.g. npm start with agentic UI enabled, or npm run dev:local --workspace=apps/ui against studio ui).
2. Start creating a new site and expand Advanced settings.
3. Confirm the Admin email input has no envelope icon and looks consistent with the other inputs, in both light and dark mode.
4. Enter an invalid email (e.g. not-an-email) and confirm the validation error still appears.
5. Repeat the check in an existing site's Settings view, which shares the same field.

Pre-merge Checklist

• Have you checked for TypeScript, React or other console errors?

[wpmobilebot]

📊 Performance Test Results

Comparing cc982ad vs trunk

app-size

Metric	trunk	cc982ad	Diff	Change
App Size (Mac)	1419.35 MB	1419.35 MB	+0.00 MB	⚪ 0.0%

site-editor

Metric	trunk	cc982ad	Diff	Change
load	1080 ms	1083 ms	+3 ms	⚪ 0.0%

site-startup

Metric	trunk	cc982ad	Diff	Change
siteCreation	7035 ms	6990 ms	45 ms	⚪ 0.0%
siteStartup	2346 ms	2354 ms	+8 ms	⚪ 0.0%

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Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[bcotrim]

LGTM 👍

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