feat(headless): automatic session prefetching after call ends

- Add automatic preloadSession() call in handleDisconnect() when warmStart is enabled
- Add _isDestroyed flag to prevent prefetching when SDK is being destroyed
- Session is fetched in background immediately after call ends
- Next call will use pre-fetched session for instant connection
- Bump version to 1.9.3

This enables near-instant reconnection for subsequent calls and improves
the warm start user experience across the entire session lifecycle.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

add warm start option to headless iwy SDK

chore(release): 1.8.0

chore(release): 1.6.1

  - Add HTTP widget to build pipeline
  - Enable CDN distribution for webrtc-live-avatar-http

add web-rtc-live-avatar w/ http signaling

bump version

feat: add headless widget

chore(release): 1.2.0 [skip ci]

# [1.2.0](v1.1.0...v1.2.0) (2025-10-19)

### Features

* add audio-visualizer component ([a837f45](a837f45))

chore(release): 1.1.0 [skip ci]

# [1.1.0](v1.0.0...v1.1.0) (2025-10-03)

### Bug Fixes

* "Listening..." not unintentionally displayed ([be084b0](be084b0))
* improve top & bottom shadow gradient ([2cf56d7](2cf56d7))
* tweak ui: dropdown + bottom shadow ([4fb376f](4fb376f))

### Features

* add back buttons: "end call" and mic ([6af796e](6af796e))
* added on-hover start call ([aa33d33](aa33d33))

chore(release): 1.0.0 [skip ci]

# 1.0.0 (2025-10-03)

### Bug Fixes

* convert update-versions.js to ES modules and add CI workflow ([22e3d1c](22e3d1c))
* test.html local site ([fe91c8a](fe91c8a))

### Features

* add parameter: language="no" {"en", "no"} ([a968826](a968826))
* add place-holder image argument (optional) ([e8dbb9b](e8dbb9b))
* add semantic-release automation ([20cf98e](20cf98e))
* setup npm package ([e7f345a](e7f345a))