* feat(linux): add Quick Chat floating composer to the Tauri companion
- frameless transparent always-on-top quickchat window (on-demand, canvas
pattern), positioned top-third on the cursor monitor, CSS fade+zoom in/out
- global shortcut Ctrl+Shift+Space on X11 (GNOME reserves Alt+Space); tray
'Quick Chat' item is the Wayland entry point; blur/Esc/close-request hide
- sends via the CLI agent turn with --message-file staged 0600 (argv is
world-readable procfs) and cleaned up after the turn; failures surface as
desktop notifications; Ctrl+Enter also opens the dashboard
- default-agent identity chip (emoji/monogram) from agents list --json, 60s cache
- window-scoped capability + permission set; window-state denylist; docs
* chore(linux): register quickchat.js as a knip native-asset entry
Sparkle-parity self-update for the apps/linux companion: tauri-plugin-updater +
process, checked silently on launch and from a "Check for Updates" tray item /
manual trigger. AppImage installs download, verify the signed update, and wait
for a user-confirmed restart; package-managed (deb) installs get a release-page
notice instead of replacing files the system package manager owns. The
linux-app release workflow signs the AppImage and publishes a signed latest.json
manifest that the app verifies with the committed minisign public key.
New discovery.rs browses _openclaw-gw._tcp with a lifetime mdns-sd
browser, keeps a fullname-keyed snapshot (resolved updates replace,
goodbye/TTL removes), and mirrors the native clients' TXT contract and
direct-selection gate (resolved SRV endpoint routing; tailnetDns is a
hint only). The bootstrap page lists discovered gateways and connecting
navigates the dashboard WebView to the resolved endpoint, validated
against the live snapshot; remote selection cancels the local watchdog
so an in-flight local bootstrap cannot steal the WebView back.
