Unify CefWebviewUri and InlineHtml into a single WebviewSource enum component, eliminating the dual-component inconsistency where both existed on the same entity
Add ResolvedWebviewUri internal component as a resolution layer between user-facing source and CEF
Support dynamic reload: mutating WebviewSource at runtime automatically navigates the existing browser via browsers.navigate() without recreation
Inline HTML is served via cef://localhost/__inline__/{id} with automatic cleanup on entity despawn
bevy_winit does not call `set_ime_allowed()` during initial window
creation when `Window::ime_enabled` is `true`. The `changed_windows`
system only fires when the value differs from cache, but the cache
is initialized from the window itself so they start equal. Since
winit 0.27+ requires explicit `set_ime_allowed(true)`, no Ime events
were ever generated.
