What happened:
`omarchy battery status` shows `0W` while discharging, even though UPower knows the real rate. Time-left is correct, only wattage is wrong:
- `omarchy battery status` → `Battery 94% · 6h 54m left · 0W / 40Wh`
- `omarchy battery status --shell` → `rate 0W`, `time 6h 54m`
- `upower -i` → `energy-rate: 5.51928 W`, `time to empty: 6.9 hours`, `percentage: 94%`

What was expected:
Wattage should show ~5.5W (the UPower value), not 0W.

Steps to reproduce:
1. On a machine where `/sys/class/power_supply/BAT0/power_now` exists but reads fail with `No such device`, and `current_now` is absent (HP Pavilion 15-eh1xxx here).
2. Unplug AC so battery is `Discharging`.
3. Run `omarchy battery status` and compare with `upower -i $(upower -e | grep BAT)`.

Root cause:
In `omarchy-battery-status`, the UPower rate is unconditionally overwritten when the sysfs node merely passes `[[ -r … ]]`:
```bash
if [[ -r $battery_path/power_now ]]; then
  power_rate_raw=$(awk -v microwatts="$(<"$battery_path/power_now")" 'BEGIN { print microwatts / 1000000 }')
```
On this machine `-r` is true, but the read fails with ENODEV, so `microwatts` is empty and awk yields `0`, clobbering the good `5.5W` from UPower. Same hazard applies to the `current_now`/`voltage_now` branch.

Suggested fix:
Only override when the sysfs read actually succeeds and is numeric, e.g.:
```bash
if microwatts=$(cat "$battery_path/power_now" 2>/dev/null) && [[ $microwatts =~ ^[0-9]+$ ]]; then
  power_rate_raw=$(awk -v microwatts="$microwatts" 'BEGIN { print microwatts / 1000000 }')
elif ...
```

System details:
- Omarchy: 4.0.4-1
- Kernel: 7.2.5-3-omarchy
- Laptop: HP Pavilion Laptop 15-eh1xxx, BIOS F.34 (03/30/2026)
- CPU: AMD Ryzen 5 5500U with Radeon Graphics
- GPU: AMD/ATI Lucienne
- Battery: BAT0, HP Primary, 16 cycles, `energy_full=40574000`, `energy_now` dropping normally after update

Diagnostics:
```
$ cat /sys/class/power_supply/BAT0/power_now
cat: /sys/class/power_supply/BAT0/power_now: No such device
$ ls /sys/class/power_supply/BAT0/
alarm capacity capacity_level cycle_count device energy_full energy_full_design energy_now extensions hwmon2 manufacturer model_name power power_now present serial_number status subsystem technology type uevent voltage_min_design voltage_now
$ cat /sys/class/power_supply/BAT0/hwmon2/power1_input
cat: .../power1_input: No such device
```
Note: `omarchy debug --no-sudo --print` / `omarchy debug` does not exist in 4.0.4-1 (`Unknown Omarchy command`), so no debug log attached — happy to provide whatever the current equivalent is.