Add monitor auto-configuration

[dlsvob]

Summary

When an unknown monitor is plugged in, Hyprland's fallback rule (monitor=,preferred,auto,auto) picks a reasonable mode and scale — but that choice isn't persisted. Next time the same monitor appears, Hyprland starts fresh.

This PR adds a background script (omarchy-monitor-autoconfig) that:

• On startup: scans all connected monitors, adds desc: entries for any not already in monitors.conf
• On hotplug: listens for monitoradded events via socat on Hyprland's socket2, then captures and saves the new monitor's settings
• Falls back to polling every 5s if socat isn't available

For each detected monitor, the script:

1. Skips eDP-1 (laptop panel — always manually configured)
2. Skips disabled monitors and those with empty make/model
3. Builds a desc: prefix from make + model (no serial, so it matches any unit of that model)
4. Checks if monitors.conf already has a matching desc: entry — if so, skips
5. Reads current width, height, refreshRate, and scale from hyprctl monitors -j
6. Inserts a new entry before the fallback rule in monitors.conf
7. Sends a desktop notification via notify-send

Position is always auto — users can manually set positions later.

Changes

File	Change
bin/omarchy-monitor-autoconfig	New script
default/hypr/autostart.conf	Added exec-once
install/omarchy-base.packages	Added socat
migrations/1772362507.sh	Installs socat for existing users

Test plan

• Fresh install: verify the script launches on login and doesn't add entries for monitors that don't exist
• Existing monitors: verify already-configured monitors are recognized and skipped (no duplicates)
• Hotplug: plug in a new/unknown monitor → expect notification and new desc: entry in monitors.conf
• No socat: uninstall socat, restart script → verify it falls back to polling mode
• Laptop skip: verify eDP-1 is always skipped regardless of state

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds an automatic monitor configuration persistence mechanism for Hyprland by introducing a background script that records Hyprland’s chosen mode/scale for newly-seen monitors into ~/.config/hypr/monitors.conf, and wires it into startup/hotplug handling.

Changes:

• Add omarchy-monitor-autoconfig script to detect unknown monitors and write monitor=desc:... rules.
• Start the script on login via Hyprland exec-once.
• Ensure socat is installed (base packages + migration) for event-driven hotplug detection with a polling fallback.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
bin/omarchy-monitor-autoconfig	Implements monitor scanning, config insertion, and socat/polling hotplug detection.
default/hypr/autostart.conf	Launches the new autoconfig script at session start.
install/omarchy-base.packages	Adds socat to the base install set.
migrations/1772362507.sh	Installs socat for existing users.

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[Copilot]

For consistency with other migrations that install packages, consider adding --needed to the pacman -S invocation so reruns don’t attempt reinstalls (even though you already gate on command -v).

Suggested change

	sudo pacman -S --noconfirm socat
	sudo pacman -S --needed --noconfirm socat