Add taskbar flash notification when Claude Code pauses for user input selection

Description:

Feature Request: Taskbar Flash for User Input Required

Problem:
When Claude Code pauses execution to present a list of options for user selection (e.g., multiple file choices, disambiguation prompts), there's no visual indication in the
taskbar that user input is required. This makes it easy to miss when Claude has paused and is waiting for a response, especially when working in other applications.

Proposed Solution:
Add taskbar flashing functionality that activates specifically when Claude Code is waiting for user input selection from a presented list of options.

Specific Behavior Requested:

• ✅ Flash taskbar when Claude pauses with a numbered list of options requiring user selection
• ✅ Flash taskbar when Claude presents disambiguation choices
• ❌ Do NOT flash when Claude simply finishes a task and returns to normal prompt
• ❌ Do NOT flash for regular command completion

Use Case:
When Claude encounters multiple possible matches (e.g., multiple files with similar names) and presents a numbered list like:
Found multiple matches:

1. file1.js
2. file2.js

Please select which file (1-2):

The taskbar should flash to alert the user that a selection is required.

Platform: Windows (primary request, but cross-platform support would be ideal)

Additional Context:
This would improve workflow efficiency by providing a clear visual cue when user interaction is specifically required, without being overly intrusive for normal task
completion.