* platform: GNOME's light setting reads as light, and Watcher::wait_first for the first frame
GNOME 42-46 writes color-scheme 'default' for Settings > Appearance > Light and the portal
reports 0. Both now decode as Light on GNOME (XDG_CURRENT_DESKTOP, read once at start);
0 stays no preference on other desktops.
Watcher::wait_first(timeout) blocks until the first answer, a known-absent portal with an
empty fallback, a no-preference answer, worker exit or drop, or the timeout.
* platform: GNOME's 'default' is light only on a GNOME desktop
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Co-authored-by: aiongg <aiongtaigi@gmail.com>
Add opt-in browser download helpers that own detached links and object URLs, clean up failed or abandoned preparation, and register delayed URL cleanup before issuing a click. Applications retain filename, MIME type, pacing, and user-activation policy.
Include browser lifecycle and failure-path tests, public API documentation, and Sonar test-source classification. All 32 PR checks passed; targeted WASM Clippy and formatting passed in local validation.
aionggandaiongg
skylar taylor-barrick
