feat(media): add an Icon presentation for Now Playing

[thornburywn2]

Problem

On a narrow output (here a 2880×1800 laptop panel at 3×, so a 1270pt bar), a playing track widens G9 by roughly 160pt: the previous/next controls plus the 88pt title marquee.

• Bar drops a stage: that pushes the bar from responsive stage 0 to stage 1, which hides G9 (and G10).
• It stays dropped: a hidden group can't be re-measured, so after playback stops candidates[0] keeps the playing-width figure and the bar stays in stage 1 until the shell reloads.

So on narrow bars, Now Playing disappears exactly when something is playing.

Measured with omarchy-shell shell debugBarGeometry and a silent mpv test track:

Presentation	Idle need	Playing need	Stage while playing
Default	1236	~1395	1 (G9/G10 hidden)
Compact (FULL/muse)	1236	1365	1 (G9/G10 hidden)
Icon (this PR)	1236	~1259	0

Change

A third G9 presentation, mediaStyle: "icon": the default row with only play/pause and the playing pulse. The lazy panel keeps the full controls, cover and progress.

• Media BarWidget.qml: normalizes default / full / icon. iconStyle hides the skip controls and marquee, and the marquee animation isn't started while hidden. Adds marqueeVisible alongside the existing museVisible / v1FullVisible hooks.
• State Service.qml: normalizedMediaStyle() keeps "icon" in both the reader and the appearance setter. Previously anything other than "full" collapsed to "default".
• Control Center: G9 offers Default / Compact / Icon. I avoided "Minimal" because the retired-controls check in control-center-regression.sh reserves that word.
• Docs: describes Icon in docs/v1-presentation-contract.md.

Default and Compact behave exactly as before.

Tests

• tests/audio-media-plugins-regression.sh: passed.
  • New static checks: normalization, hidden skip controls and marquee, the Control Center option, and state normalization.
  • The media smoke test has a new Icon phase: Icon is active, the row is visible, the visualizer isn't, the marquee is hidden, and play/pause forwards both ways. The Default phase now also asserts the marquee is visible.
  • Width isn't asserted in the smoke test because the headless window never re-lays out the row; the real-bar numbers are in the table above.
• tests/control-center-regression.sh: passed. The smoke test now expects three G9 options and that cycling persists icon before restoring Default, in both V1 and V2.
• tests/contract-regression.sh: everything passes except test_package_release.test_lifecycle_contract_pins_exact_release_identities. That's expected: the digest in contracts/lifecycle-predecessors-v1.json changes with any plugin change, and recent fix: commits likewise leave it for the release: repin … step.

Real Wayland check

Omarchy 4.0.4 V1 Shibumi bar on a single 1270pt output, playing a silent mpv track: with Icon selected, G9 shows play/pause and the pulse at 56pt, the bar stays in stage 0, and G9 and G10 remain visible during and after playback.

🤖 Generated with Claude Code

[HANCORE-linux]

Thanks for the detailed measurements! We'll keep Now Playing at its two presentations; Compact already drops the skip controls and title. The underlying problem you found — the bar staying in the reduced stage after playback stops until the shell reloads — is a real bug, and we'll look at it separately.