feat: request mic permissions aync

[ao-anam]

Summary by cubic

Request microphone permission asynchronously so WebRTC connection setup is non-blocking. Audio is attached after permission is granted, with clear permission state and events for UI.

• New Features

  • Request mic access in the background; connection proceeds without waiting.
  • Added AudioPermissionState and InputAudioState.permissionState to track not_requested, pending, granted, denied.
  • New events: MIC_PERMISSION_PENDING, MIC_PERMISSION_GRANTED, MIC_PERMISSION_DENIED.
  • On grant, attach audio via replaceTrack (fallback to addTrack) and emit INPUT_AUDIO_STREAM_STARTED.
  • If a user-provided MediaStream is passed, we only validate it; we no longer block to request mic access during setup.

• Migration

  • Listen for MIC_PERMISSION_* events to prompt users and handle errors.
  • Do not assume mic access is available at connect time; audio may attach later.
  • Import and use AudioPermissionState if you consume permission state.
  • To bypass permission flow, continue passing a pre-captured MediaStream.

[Copilot]

Pull Request Overview

This PR adds asynchronous microphone permission handling to the streaming client, allowing microphone access requests to be made in parallel with connection setup rather than blocking the initial connection.

• Introduces a new AudioPermissionState enum to track microphone permission status
• Adds new events for microphone permission lifecycle (MIC_PERMISSION_PENDING, MIC_PERMISSION_GRANTED, MIC_PERMISSION_DENIED)
• Refactors audio setup to use replaceTrack API when permissions are granted asynchronously

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/types/index.ts	Exports the new AudioPermissionState enum
src/types/events/public/EventCallbacks.ts	Adds callback types for new microphone permission events
src/types/events/public/AnamEvent.ts	Defines the new microphone permission event constants
src/types/InputAudioState.ts	Adds AudioPermissionState enum and updates InputAudioState interface
src/modules/StreamingClient.ts	Implements async microphone permission handling and audio track replacement
src/AnamClient.ts	Updates input audio state initialization to include permission state
package.json	Updates version number for this feature branch

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[cubic-dev-ai]

No issues found across 6 files