fix(web): label keybinding condition removal actions

[RakshithBhat03]

The minus buttons in the keybinding When editor did not explain whether they removed one condition, a nested group, or the entire expression. Their accessible names were inconsistent with the scope of the action too.

Each action now uses the styled tooltip component and a matching accessible label: Remove condition, Remove group and its conditions, or Clear all conditions. The existing neutral hover treatment stays unchanged.

Tests: 10 focused tests, web typecheck, targeted lint.

Before	After

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[macroscopeapp]

Approvability

Verdict: Approved at 84bc38c

Macroscope's review found this PR approvable — This is a focused accessibility and usability fix that clarifies the scope of existing keybinding removal buttons through labels and tooltips. Removal behavior, persistence, defaults, and other runtime workflows remain unchanged, with the new labeling logic covered by tests.

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