refactor(uve): remove duplicate copy URL button from editor toolbar

[zJaaal]

Parent Issue

Closes #35517

Summary

The UVE editor was rendering the same "copy page URL" popover in two places:

• the top editor toolbar (pi pi-copy, next to the bookmark star)
• the browser URL pill (pi pi-link, on the pill that shows the URL itself)

Both buttons opened the same $pageURLS popover and called the same toast. The pill version was added in #35417 when the URL pill itself was introduced. Since the URL now lives on the pill, the copy control belongs there — the toolbar one is pure duplication.

This PR removes the toolbar copy button and cleans up the symbols that became unused.

Changes

• dot-uve-toolbar.component.html — drop the <p-button> + <p-popover> block
• dot-uve-toolbar.component.ts — remove ClipboardModule, PopoverModule, $pageURLS, copyUrlPopoverPt, triggerCopyToast, and the createFullURL import
• edit-ema-editor.component.* — unchanged; the pill copy button stays

Test plan

• yarn nx lint portlets-edit-ema-portlet — clean (only pre-existing warnings in another file)
• yarn nx test portlets-edit-ema-portlet — 63 suites, 1331 passed, 5 skipped
• Manual smoke: open a page in UVE, confirm the copy button on the URL pill still copies and toasts; confirm the toolbar no longer has the duplicate

🤖 Generated with Claude Code

This PR fixes: #35517

[claude]

Claude finished @zJaaal's task in 2m 21s —— View job

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Code Review

• Gather context
• Read changed files
• Check for orphaned references
• Post review findings

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Clean removal overall. One leftover to fix.

dot-uve-toolbar.component.spec.ts lines 88–95 — stale mock

// Mock createFullURL to avoid issues with invalid URLs in tests
jest.mock('../../../utils', () => ({
    ...jest.requireActual('../../../utils'),
    createFullURL: jest.fn((params, siteId) => { ... })
}));

createFullURL is no longer imported or used by DotUveToolbarComponent after this PR, so this mock is dead weight. It won't break tests, but it signals a dependency the component doesn't have. Fix this →

Everything else is clean — the HTML block and all five TypeScript symbols (ClipboardModule, PopoverModule, $pageURLS, copyUrlPopoverPt, triggerCopyToast, createFullURL import) are fully removed without leaving orphaned references in the component itself. The pill copy button in edit-ema-editor.component.ts is untouched.