fix(power): #60 name-agnostic system-battery scan

Replace BAT* globs with type=Battery + !scope=Device (same filter as
nomarchy-battery-notify) in charge-limit oneshot, menu gates, Waybar
power-profile self-gate, doctor, and install chassis detection. CMB0-
style names get charge-cap and laptop modules consistently.

V3 pending: confirm on non-BAT* hardware (HARDWARE-QUEUE). Close #60.

Verified: V1 (option-docs, hardware-db-modules, battery-charge-limit VM).

modules/nixos/power.nix

@@ -50,7 +50,12 @@ in
         RemainAfterExit = true;
       };
       script = ''
-        for thresh in /sys/class/power_supply/BAT*/charge_control_end_threshold; do
+        # Name-agnostic (BAT0, CMB0, …): same type/scope filter as
+        # nomarchy-battery-notify — BACKLOG #60.
+        for d in /sys/class/power_supply/*/; do
+          [ "$(cat "$d/type" 2>/dev/null)" = Battery ] || continue
+          [ "$(cat "$d/scope" 2>/dev/null || echo System)" = Device ] && continue
+          thresh="$d/charge_control_end_threshold"
           [ -w "$thresh" ] && echo ${toString cfg.batteryChargeLimit} > "$thresh"
         done
         exit 0