feat: add volume scroll to controls button and players

[flathead]

Adds mouse wheel volume control to audio-related components across the bar and dashboard.

Changes

modules/bar/ControlsButton.qml -- added onWheel to the existing MouseArea. Scrolling on the controls button adjusts system volume without opening the popup.

modules/widgets/defaultview/CompactPlayer.qml -- added a MouseArea overlay at the bottom of the StyledRect with acceptedButtons: Qt.NoButton so it only captures wheel events and passes all clicks through to player controls. Scroll is only active when a player is present.

modules/widgets/dashboard/widgets/FullPlayer.qml -- same approach: a MouseArea overlay with acceptedButtons: Qt.NoButton at z:0, allowing volume scroll anywhere on the full player surface without interfering with seek bar, play/pause, or other controls.

All three use Audio.incrementVolume() / Audio.decrementVolume() for consistent step behavior with the rest of the shell.

Demo

2026-04-01T21-24-26-706Z.mp4

Install as a mod

Requires the native manager from PR #230. Paste the package link into Settings → Mods → Package source:

https://github.com/flathead/ambxst-mods/tree/main/packages/volume-scroll

This package adds no user-visible strings, so it has no required mods. From the CLI:

ambxst mods install https://github.com/flathead/ambxst-mods/tree/main/packages/volume-scroll
ambxst mods enable community.volume-scroll
ambxst reload

The packaged version uses WheelHandler on both players. It does not depend on sibling stacking order and does not place a full-size MouseArea over player controls.

Merge into Ambxst core

For core review, take this PR's branch: the feature as ordinary Ambxst source on dev.

The package patch is a separate artifact. It targets a tree that already carries the mod manager from PR #230, because that is the only tree a mod can be installed on. To reproduce exactly what the manager composes:

git remote add flathead https://github.com/flathead/Ambxst.git
git fetch flathead feature/mod-manager
git switch -c mods/volume-scroll flathead/feature/mod-manager
git apply --3way ambxst-mods/packages/volume-scroll/patches/feature.patch
go test ./...
go vet ./...

The patch only touches ControlsButton.qml, CompactPlayer.qml, and FullPlayer.qml. The installed mod and the core implementation use the same handlers and Audio service calls.

Package parity

Every file the package in flathead/ambxst-mods touches is byte-identical to this branch, WheelHandler rewrite included. This feature adds no user-visible strings, so there is no translator difference either.

[Axenide]

Nice, please add some screenshots. :)