Bell notifications

A bell that rings while the terminal is hidden posts a desktop notification naming the tab - the one desktop-environment feature a hidden drop-down uniquely needs.

A bell that rings while the terminal is hidden posts a desktop notification naming the tab’s title - the one DE feature a hidden drop-down uniquely needs (printf '\a' in a long-running build now finds you). Delivery goes straight to the freedesktop notification interface over D-Bus, which cosmic-notifications serves on COSMIC; COSMIC implements no Notification portal, so no portal is involved. The rules:

• Only while hidden: when the overlay is visible, the tab-bar 🔔 marker alone carries the signal.
• One notification per tab per hide period: a bell storm (while true; printf '\a'; done) yields a single notification - the per-tab latch clears the next time the terminal is shown.
• Toggle with bell_notification_enabled (default true, Behavior section in the settings drawer); it applies at the next bell - the tab-bar markers are unaffected either way.
• No notification daemon: the post fails with a warn log; nothing surfaces and the terminal is unaffected.

Finished-command notifications

A command that finishes while the terminal is hidden posts its own desktop notification - run the build, hide the terminal, get told. The notification names the tab and reports the command’s duration in the status band’s own m:ss / h:mm:ss shape, naming the command itself when the app sampled one while it ran (“cargo finished in 2:41”); an unsampled run falls back to “Command finished in 2:41” - the same honesty as the band’s frozen pairing. The rules:

• Only while hidden: a visible terminal already carries the signal - the status band’s frozen duration segment on the active tab, the activity marker on the rest.
• Only past the threshold: a hidden ls that finishes never pings. command_finish_notification_after_secs (default 5 seconds) sets the minimum duration; a finish exactly at the threshold counts.
• One notification per tab per hide period: the per-tab latch - the bell’s exact shape - clears the next time the terminal is shown, so the next hidden long command notifies again.
• Toggle with command_finish_notification_enabled (default true, Behavior section in the settings drawer); both keys apply at the next finish.