waybar: pin the bar to the main monitor of the active profile

The previous fix listed both profiles' primaries, "output": ["eDP-1",
"DP-1"] -- but DP-1 is the laptop's second monitor too, so the laptop
would have got a bar on it as well as on eDP-1. No static list can express
"the main monitor" when the two machines share an output name.

Resolve it at launch instead. hypr/scripts/bar asks Hyprland for the
monitor at position 0x0 -- the main monitor in both profiles -- writes
{"output": "<name>"} to ~/.cache/waybar-output.jsonc, and execs waybar;
waybar/config.jsonc includes that fragment. autostart/services, the
bar_reload bind and the performance script all go through the wrapper, so
a reload re-resolves after docking. Signals still target the waybar
process, not the wrapper.

Verified all three paths on mainPC: the fragment pins the bar to DP-1
only, an empty fragment falls back to a bar on every output, and a
fragment naming a disconnected output maps nothing (the failure mode this
started from). Config parses on both profiles.

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

hypr/scripts/autostart/services

@@ -9,8 +9,8 @@ awww-daemon --format xrgb &
 # Pyprland Daemon
 pypr --debug /tmp/pypr.log &
 
-# Bar
-waybar &
+# Bar (wrapper pins it to the main monitor of the active profile)
+"$HOME"/.config/hypr/scripts/bar &
 
 # Notification Daemon
 swaync &