`devState` is a module-global shallowRef that the HMR handlers drive to
{type:"error"} / {type:"update"}; nothing reset it on the create path. createApp()
can run multiple times in one dev process (two apps, unmount + re-create, a UI
restart tool, a test run), so a fresh app would inject the previous app's leftover
state and render its old "Build Error" / "[HMR] updated" overlay instead of its own
content — until the next HMR event happened to reset it.
Add resetDevState() (hmr.ts) and call it from render()'s `__VUE_TUI_DEV__` block,
right after initHmrBridge(), so every newly-mounted dev app starts from a clean
status — consistent with the very first app, which sees the module's initial
{type:"ok"}.
Dev-only (the block is gated behind the cli vite-plugin's `__VUE_TUI_DEV__` define).
TDD: the unit test drives a stale error/update via the real vite:error /
vite:beforeUpdate handlers, then asserts resetDevState() clears it (the per-mount
hook render() now invokes).
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Yunfei He
fa1ab61470