feat: resource monitor widget for bar

[flathead]

Adds a system resource monitor widget to the bar, configurable via System → System Resources settings.

What's new

Bar widget

• New chip in the bar showing CPU, RAM, GPU and disk usage with colored icons
• Click opens a detail popup with usage bars, model name, temperatures and history
• Horizontal bar: metrics in a row, stable fixed width via TextMetrics (no jitter on value change)
• Vertical bar: metrics stacked as icon-above-value columns, fixed width matches other bar elements

Location setting

• Dashboard — resources only in the dashboard metrics tab (previous behavior)
• Bar — resources only in the bar, metrics tab removed from dashboard
• Both — resources in both places simultaneously with independent visibility settings

Visible items

• Toggle buttons for CPU / RAM / GPU / Disk and temperature per location
• When location = Both, Dashboard and Bar get separate sets of toggle buttons

Settings UI

• Location and Bar Side selectors use the shell-native StyledRect button style (same as Shell and Compositor panels)
• Pending-state pattern: changes apply only on explicit Save

Config changes

New keys in resources.show:

• barCpu, barRam, barGpu, barDisk — visibility in bar
• dashTemp, barTemp — temperature display per location

All new keys default to true and are deep-merged by ConfigValidator, so existing configs are unaffected.

Screenshots

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/bar-resource-monitor

The package needs community.i18n (PR #134) for its Settings and metrics strings. The details pane marks that requirement as missing, disabled, or ready, and Install required mods fetches i18n, enables it first, and leaves this package for you to enable. The same steps from the CLI:

ambxst mods install https://github.com/flathead/ambxst-mod-i18n.git
ambxst mods enable community.i18n
ambxst mods install https://github.com/flathead/ambxst-mods/tree/main/packages/bar-resource-monitor
ambxst mods enable community.bar-resource-monitor
ambxst reload

The package targets the current Go-backed systemmonitor service. Its subscription stays inactive unless the Dashboard metrics tab is open or the bar monitor is configured to be visible. It does not restore the old Python polling process.

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 and the community.i18n package, 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/bar-resource-monitor flathead/feature/mod-manager
git apply --3way ambxst-mod-i18n/patches/feature.patch
git apply --3way ambxst-mods/packages/bar-resource-monitor/patches/feature.patch
go test ./...
go vet ./...

It adds BarResourceMonitor.qml, registers it in the bar, and extends the existing resources Config, service, Dashboard visibility rules, metrics view, and System settings. This PR's branch already calls I18n.t() in two places, so it expects PR #134 too; the package only states that requirement instead of leaving it implied. The mod uses the same backend subscription and QML components that core would use.

Package parity

The package in flathead/ambxst-mods and this branch carry the same feature code, including the Go-backed subscription and the monitoringActive rule that keeps it dormant. SystemPanel.qml and MetricsTab.qml differ only where the package wraps strings for community.i18n, and the Config files differ in their registration lines.

[Axenide]

Screenshots please