feat(remote): machine metrics (CPU/RAM/load/temps) for remote hosts

[falkoro]

Remote host cards in the sidebar now show live machine metrics — CPU%, RAM, load average, uptime, and temperatures — instead of just ping + the container list.

How

• One SSH round-trip per host (unchanged count): the container script now also emits marked ##SD_* sections (two /proc/stat samples for an instantaneous CPU%, plus meminfo/loadavg/uptime/nproc/hwmon temps).
• New src/remote_metrics.rs parses those sections, reusing the local /proc parsers in metrics (cpu_sample/meminfo_kb). Unit-tested.
• Frontend renders a compact CPU/RAM meter block + load/uptime line + temp chips inside each remote-host card, reusing the existing .meter styling. Temps follow the existing machineSensors panel toggle.

Configurable (it's a public repo)

DASHBOARD_REMOTE_METRICS (default on) — set to 0 to keep remote cards to ping + containers only, e.g. if you'd rather run glances/netdata on the remote box, or just don't want machine monitoring. Documented in .env.example.

Verified

cargo test (28 pass) + end-to-end against logan-gl502vs: card shows CPU 17%, 8 cores, RAM 8.3/15.5 GiB, load, uptime 125d, and temps (coretemp / NVMe / ACPI).

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds live machine metrics for configured remote SSH hosts so sidebar cards show CPU, RAM, load, uptime, and temperature readings alongside ping and container status.

Changes:

• Extends remote host checks to optionally gather /proc and hwmon metrics in the same SSH probe.
• Adds backend parsing and serialization for remote machine metrics, with unit coverage.
• Updates frontend rendering, styling, and configuration docs for the new DASHBOARD_REMOTE_METRICS toggle.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/routes.rs	Passes the remote metrics config flag into remote host checks.
src/remote.rs	Combines container and optional metrics collection in one SSH probe and returns metrics in host status.
src/remote_metrics.rs	Adds remote metrics shell script output parsing and tests.
src/metrics.rs	Exposes existing /proc helper parsers for reuse by remote metrics.
src/main.rs	Registers the new remote_metrics module.
src/config.rs	Adds DASHBOARD_REMOTE_METRICS configuration support.
frontend/metrics.ts	Adds remote metrics types and rendering for host cards.
public/metrics.js	Updates generated served JavaScript for the frontend changes.
public/app.css	Adds compact remote metrics card styling.
.env.example	Documents the remote metrics configuration flag.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.