luci-mod-network: txpower value 0 dBm displayed as "driver default" instead of "1 mW"

[Sm00shed]

Is there an existing issue for this?

• I have searched among all existing issues (including closed issues)

screenshots or captures

No screenshot available. The bug is reproducible on any OpenWrt 25.12.2 device with WLAN by setting txpower to 0 dBm in LuCI under Network > Wireless.

Actual behaviour

When setting the transmit power to 0 dBm in LuCI under Network > Wireless, the dropdown displays "driver default" instead of "0 dBm (1 mW)". Setting 1 dBm works correctly and displays "1 mW".

Expected behaviour

0 dBm should display "0 dBm (1 mW)" like any other value in the list.

Steps to reproduce

1. Go to Network → Wireless
2. Click Edit on a radio
3. Set Maximum transmit power to 0 dBm
4. Save and Apply
5. Reopen the edit dialog — dropdown shows "driver default" instead of "0 dBm (1 mW)"

Additional Information

ubus call system board
{
  "model": "OpenWrt One",
  "release": {
    "version": "25.12.2",
    "revision": "r32802-f505120278",
    "target": "mediatek/filogic"
  }
}

Root cause:
In modules/luci-mod-network/htdocs/luci-static/resources/view/network/wireless.js in class CBIWifiTxPowerValue:

Bug — p.dbm is a Number, UCI returns a String:
this.value(p.dbm, `${p.dbm} dBm (${p.mw} mW)`);

Fix — convert to String for correct comparison:
this.value(String(p.dbm), `${p.dbm} dBm (${p.mw} mW)`);

UCI always returns strings. The comparison "0" === 0 fails in JavaScript — so the dropdown finds no matching entry and falls back to "driver default".

Proof — console test on the wireless edit page:
document.querySelector('select[id*="txpower"]').options[1].value
'0' ← string with quotes confirmed

What browsers do you see the problem on?

No response

Relevant log output

Browser independent — the bug is in the JavaScript code, not browser specific.