Feature Request: System notifications when Claude needs attention or completes tasks

Summary

As a user working on multiple tasks, I would like to receive system-level notifications (VSCode notifications or terminal notifications) when Claude Code needs my attention or completes a task, similar to how GitHub Copilot provides notifications.

Use Case

When I ask Claude to perform a long-running task or multiple tasks, I often switch to other work. Currently, there's no way for me to know when:

• Claude has completed all tasks
• Claude needs my approval (e.g., for DELETE/UPDATE/INSERT queries)
• Claude is blocked and waiting for my input
• Claude has encountered an error that requires my attention

Proposed Solution

Add notification support that can:

1. Send VSCode notifications when Claude needs attention or completes tasks
2. Send terminal/system notifications when running in terminal mode
3. Allow users to configure notification preferences (e.g., only on completion, only when blocked, etc.)

Expected Behavior

Similar to GitHub Copilot's notification system, users should receive unobtrusive notifications that:

• Appear in the VSCode notification area or system tray
• Can be clicked to jump back to the Claude Code conversation
• Can be configured or disabled in settings

Current Workaround

Currently, users must actively monitor the conversation to know when Claude needs attention, which reduces productivity when multitasking.

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Would love to see this feature to improve the workflow when working with Claude Code on complex, multi-step tasks!