Add tooltips to StyledTabButton

[ajuncosa]

Partially resolves: musescore/MuseScore#32604

Adds tooltips over truncated text on StyledTabButtons, without interfering with button interaction.

Related to: musescore/MuseScore#33765

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📝 Walkthrough

Walkthrough

This pull request implements tooltip and hover behavior for styled text components. StyledTextLabel's MouseArea now hides the tooltip when pressed without consuming the click event. StyledTabButton enables hover-based display of truncated text on its label, allowing text to appear when the user hovers over a truncated label.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is incomplete. It lacks the required sections including PR motivation details, CLA confirmation, and a comprehensive checklist of required items.	Complete the PR description template by adding the missing sections: CLA signature confirmation, checkbox validations, detailed motivation, and build configuration details.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: adding tooltips to StyledTabButton components.
Linked Issues check	✅ Passed	The PR addresses issue #32604 by implementing tooltips for truncated text in UI components, which directly resolves the reported problem of truncated text appearing without helpful user feedback.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to implementing tooltip functionality on StyledTabButton and StyledTextLabel to address truncated text display issues.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[mathesoncalum]

/build

[github-actions]

Build dispatched: https://github.com/musescore/muse_framework/actions/runs/27967652559