[httpsphl]

Why

Botloft only made a sound for notifications. A few soft sounds at the right moments make the app feel more alive, as long as they stay rare and quiet.

What

While Botloft is in front, with App sounds on (Settings > Notifications, on by default):

Moment	Sound
The owner's message is sent	a short, quiet tick
A reply arrives in the open chat	a soft pop that settles
A bot shares a file in the open chat	two bright notes
A bot or a crew is born (by the owner, the lead, anywhere)	a quick rising spark

• All of them are made on the spot with Web Audio, in the same timbre as the notification chime, and quieter than it. No sound files ship.
• Nothing plays within 1.5 s of another sound, so many bots at once do not make a choir. Only a bot that needs the owner gets through.
• Nothing plays while Botloft is behind (the Windows notification covers that), nor on clicks, keys, chat switches or streaming text.
• chime.ts becomes tones.ts (the notes) and sounds.ts (when to play). Notification chimes still follow "Play a sound".
• Texts in all three languages; spec 15.1 updated.

Checks

• New tests (shell/sounds.test.tsx, with the synth mocked): tick on send and silence with the switch off; reply and file only in the open chat; spark for a new bot and nothing while behind; the 1.5 s gap and the exception for "needs".
• pnpm check passes (291 tests).

Manual test

• Listen in the real app: send, reply, shared file, new bot. Check that the volume and the feel are right, and that turning "App sounds" off silences them.

[httpsphl]

Manual test: the owner listened in the real app (pnpm local, 0.9.0 build) and the sounds are good.