WhiteTowerAI/ohmygame 发布 OhMyGame v0.0.0-beta.4.9

### Added - Per-turn file diffs with Undo and Reapply, plus a read-only Git Changes view in Code. ([#246](https://github.com/WhiteTowerAI/ohmygame/pull/246)) - Export Interactive Stories as editable projects. ([#253](https://github.com/WhiteTowerAI/ohmygame/pull/253)) - A background video timeline in the Scene workbench, with playback, scrubbing, and Mark to attach a specific moment to an agent message. ([#264](https://github.com/WhiteTowerAI/ohmygame/pull/264)) - Doubao speech generation with voice selection and preview, plus speech, sound-effect, and music nodes on Asset Canvas. Audio generation requires a compatible connected provider. ([#259](https://github.com/WhiteTowerAI/ohmygame/pull/259)) - Skills in the composer's slash menu. ([#257](https://github.com/WhiteTowerAI/ohmygame/pull/257)) ### Changed - Plugins have Public and Personal collections, separate AI setup sessions, enable/disable controls, Personal plugin editing, and ZIP import/export. ([#250](https://github.com/WhiteTowerAI/ohmygame/pull/250)) - Model selection and reasoning controls share a compact composer control. ([#252](https://github.com/WhiteTowerAI/ohmygame/pull/252)) - The Asset Canvas Library picker starts with the current project selected. ([#261](https://github.com/WhiteTowerAI/ohmygame/pull/261)) - OpenAI and Anthropic browser sign-in options explain subscription limits. ([#267](https://github.com/WhiteTowerAI/ohmygame/pull/267)) ### Fixed - Desktop apps check for updates periodically and on return to the window, with retries after failed checks. ([#260](https://github.com/WhiteTowerAI/ohmygame/pull/260)) - Provider settings open without waiting for cloud verification. ([#262](https://github.com/WhiteTowerAI/ohmygame/pull/262)) - Leaked thinking tags no longer appear in agent conversations or Canvas text. ([#263](https://github.com/WhiteTowerAI/ohmygame/pull/263)) - The mouse wheel pans the canvas over node content. ([#255](https://github.com/WhiteTowerAI/ohmygame/pull/255)) - New project can open an existing workspace folder. ([#251](https://github.com/WhiteTowerAI/ohmygame/pull/251)) - Removed the empty-state prompt overlay from the Story canvas. ([#254](https://github.com/WhiteTowerAI/ohmygame/pull/254)) **Full Changelog**: https://github.com/WhiteTowerAI/ohmygame/compare/v0.0.0-beta.4.8...v0.0.0-beta.4.9