fix: debounce AudioInvoiceList search input (#971)

[shogun444]

Description

Debounce the search input in AudioInvoiceList to improve performance while keeping the input responsive.

This change introduces a local search state backed by the existing useDebounce hook (300ms). The search field updates immediately as the user types, while onFilterChange is only triggered after the debounce delay. The local state also stays synchronized with external changes to filter.search (such as when filters are cleared), and redundant filter updates are avoided by checking whether the debounced value has actually changed.

Related Issue

Closes #971

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Checklist

• Code follows project style guidelines
• Self-review completed
• No console errors
• Uses Lucide icons consistently (no changes required)
• Responsive design implemented (no UI/layout changes)
• Starknet best practices followed (not applicable to this change)

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