waybar: show the bar on this machine's primary output

The deployed config pinned "output": "eDP-1", the laptop's internal
display. On the PC waybar started fine but never mapped a layer surface,
so there was no bar and SIGUSR1 had nothing to toggle. Listed both
profiles' primaries instead -- waybar skips names that are not connected,
so the one file works on the laptop and the PC.

Two bugs in the same config that this uncovered:

- bars/main.jsonc included modules/temperature.cpu.jsonc, but the file is
  temperature-cpu.jsonc, so the temperature#cpu module the bar referenced
  was silently absent.
- get_wg_status.sh ran `sudo wg show` with no tty, logging "a terminal is
  required to read the password" on every poll. Now `sudo -n`, which fails
  instantly and falls into the existing "disconnected" branch, and starts
  working as-is if a NOPASSWD rule is ever added.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01StGBghPW9Dm7z7uj2VNWHr

waybar/scripts/get_wg_status.sh

@@ -44,7 +44,9 @@ function format {
 }
 
 # Read wg show output and format
-wg_show_output=$(sudo wg show)
+# -n so a missing NOPASSWD sudoers rule fails instantly instead of blocking
+# the module on a password prompt it has no terminal to ask on.
+wg_show_output=$(sudo -n wg show 2>/dev/null)
 
 if [[ -z $wg_show_output ]]; then
    echo "{ \"text\": \"---\", \"tooltip\": \"disconnected\", \"class\": \"\", \"percentage\": 0 }"