Windows: Now Playing over SMTC, with Mochi dancing along

[marlonayaladev]

What

Windows now shows whatever is playing on the machine — title, artist and transport buttons — as a row at the top of the overview card, and Mochi sways and bounces along while it plays.

Why

The Mac build reads Apple Music through NSAppleScript. Windows has no scripting bridge to any player, so this goes through the System Media Transport Controls session manager instead, which is player-agnostic: Spotify, VLC, browsers and Apple Music's own preview all publish a session there.

How it works

• src-tauri/src/media.rs polls SMTC once every 2 s and emits the media event only when something actually changes, so an idle machine stays silent. An empty payload is emitted when the setting is turned off, to clear the card.
• src/views/music.ts renders the row: title, artist, and Previous / Play-Pause / Next, wired to TryPlayAsync / TryTogglePlayPauseAsync / TrySkipNextAsync.
• mochi/engine.ts ramps a danceLevel in over 0.3 s and out over 0.5 s — the same ramps as the macOS build — driving Mochi's tilt and bounce.
• Settings gains a Now playing toggle (musicEnabled), defaulting to on. Turning it off stops the poller and hides the row.

Scope

The media integration and nothing else: 14 files under windows/, all of them additions. The notch geometry, the compact integrations grid, the Spanish translation and the chat/provider work are all left exactly as they are in main.

Verification

• npx tsc --noEmit — clean
• cargo check -p coucou — clean, no warnings

Note

src-tauri/src/media.rs is also created by #83, #80 and #79. Whoever merges first wins and the rest need a rebase — happy to rebase on top of any of them.