Fix audio permission handling on iOS startup

[riderodd]

Implement lazy initialization for the audio engine to prevent the microphone permission prompt at startup. Ensure proper unloading of the model and reset relevant flags for restarting. Update the react-native-vosk dependency version.

[Copilot]

Pull Request Overview

This pull request implements lazy initialization for the audio engine components to prevent triggering the microphone permission prompt when the module loads. The changes also improve error handling and state management for restart scenarios.

• Moved audio engine initialization from module init to the start method
• Added proper flag reset in error paths to allow restart after failures
• Improved cleanup in stopInternalWithoutEvents with defensive nil checks
• Updated package version to 2.1.6

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
ios/Vosk.mm	Implements lazy initialization of AVAudioEngine and related components, moves initialization from init() to start() method, adds _isStarting flag resets in error paths, improves state reset in unload and stopInternalWithoutEvents
example/ios/Podfile.lock	Updates react-native-vosk dependency from 2.1.5 to 2.1.6, reflects checksums and CocoaPods version changes

[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

ios/Vosk.mm:175

• _formatInput is initialized inside the permission callback but is set to nil during lazy initialization. This means _formatInput will only be set after the first successful start. However, the code accesses _formatInput without checking if it's nil after lazy initialization. Consider initializing _formatInput along with _inputNode in the lazy initialization block (lines 102-104) to ensure it's always available when the audio engine is initialized.

  self->_formatInput = [self->_inputNode inputFormatForBus:0];