Fix: Inconsistent Save Prompts When Closing Request Tabs

[naman-bruno]

Description

This PR resolves two related issues concerning unsaved changes in request tabs:

• Command + W closes tab without prompt #3264 - Closing a tab with changes using the mouse prompted a save dialog, but closing with Command+W did not.

• Add save prompt when closing requests from tab context menu #3224 - closing a request tab with unsaved changes automatically saved the request. This differs from the behavior when closing requests via the close icon or closing the entire application, where the user is prompted to save.

This PR standardizes the behavior by always prompting the user to save changes when closing a request tab with unsaved modifications, regardless of the closing method (mouse, Command+W, context menu).

Contribution Checklist:

• The pull request only addresses one issue or adds one feature.
• The pull request does not introduce any breaking changes
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