fix(docking): make workspace and lid transitions atomic

Restore the old flake's external-only workspace handoff, protect closed-lid cable removal with a verified low-level logind inhibitor, and use monitor-added as the settled audio reprobe boundary.

Verified: V2 — nix flake check --no-build; docking-ux, option-docs, and template-sot checks; KVM tools/monitor-fallback.nix lifecycle test.

V3 pending: closed-lid BenQ round 4 in agent/HARDWARE-QUEUE.md.

modules/home/options.nix

@@ -364,7 +364,7 @@ in
     rofi.enable = lib.mkEnableOption "Nomarchy's themed rofi launcher + the nomarchy-menu dispatcher" // { default = true; };
     swaync.enable = lib.mkEnableOption "swaync notifications, themed from the state file" // { default = true; };
     batteryNotify.enable = lib.mkEnableOption "low-battery notifications at the bar's thresholds (25% low, 10% critical — that one stays up until dismissed); self-gating, a silent no-op on machines without a battery" // { default = true; };
-    dockAudio.enable = lib.mkEnableOption "automatic default-output switch to dock/monitor audio (HDMI/DisplayPort/USB sinks) on hotplug, with a toast; EasyEffects follows along, and unplugging falls back to the built-in output" // { default = true; };
+    dockAudio.enable = lib.mkEnableOption "settled PipeWire/WirePlumber reprobe and automatic default-output switch to an available dock/monitor sink (HDMI/DisplayPort/USB) on fresh display hotplug, with a toast and journal result; a later manual choice sticks until the next plug" // { default = true; };
     firstBootWelcome.enable = lib.mkEnableOption "one dismissible \"you're set\" toast on the first session (menu/themes/keys + network pointer); marker is settings.firstBootShown in the flake checkout" // { default = true; };
     idle.enable = lib.mkEnableOption "hyprlock + hypridle (idle lock, display off, suspend)" // { default = true; };
     yazi.enable = lib.mkEnableOption "the yazi TUI file manager, themed with a curated plugin set" // { default = true; };