feat: add bluetooth to waybar and fix battery max loading

hosts/nb/modules/bluetooth-waybar.nix

@@ -0,0 +1,106 @@
+{ pkgs, ... }:
+let
+  waybar-bluetooth = pkgs.writeShellScriptBin "waybar-bluetooth" ''
+    powered=$(${pkgs.bluez}/bin/bluetoothctl show | ${pkgs.gnugrep}/bin/grep "Powered:" | ${pkgs.gawk}/bin/awk '{print $2}')
+    if [ "$powered" = "yes" ]; then
+      connected_device=$(${pkgs.bluez}/bin/bluetoothctl devices Connected | head -1 | cut -d' ' -f3-)
+      if [ -n "$connected_device" ]; then
+        icon="󰂱"
+        text="$icon $connected_device"
+        class="connected"
+        tooltip="Connected: $connected_device"
+      else
+        icon="󰂯"
+        text="$icon"
+        class="on"
+        tooltip="Bluetooth on (no device connected)"
+      fi
+    else
+      icon="󰂲"
+      text="$icon"
+      class="off"
+      tooltip="Bluetooth off"
+    fi
+
+    ${pkgs.jq}/bin/jq -cn \
+      --arg text "$text" \
+      --arg tooltip "$tooltip" \
+      --arg class "$class" \
+      '{text: $text, tooltip: $tooltip, class: $class}'
+  '';
+
+  bluetooth-toggle = pkgs.writeShellScriptBin "bluetooth-toggle" ''
+    powered=$(${pkgs.bluez}/bin/bluetoothctl show | ${pkgs.gnugrep}/bin/grep "Powered:" | ${pkgs.gawk}/bin/awk '{print $2}')
+    if [ "$powered" = "yes" ]; then
+      ${pkgs.bluez}/bin/bluetoothctl power off
+      ${pkgs.util-linux}/bin/rfkill block bluetooth
+    else
+      ${pkgs.util-linux}/bin/rfkill unblock bluetooth
+      sleep 0.5
+      ${pkgs.bluez}/bin/bluetoothctl power on
+    fi
+  '';
+
+  bluetooth-connect-menu = pkgs.writeShellScriptBin "bluetooth-connect-menu" ''
+    # Power on bluetooth if off
+    powered=$(${pkgs.bluez}/bin/bluetoothctl show | ${pkgs.gnugrep}/bin/grep "Powered:" | ${pkgs.gawk}/bin/awk '{print $2}')
+    if [ "$powered" != "yes" ]; then
+      ${pkgs.util-linux}/bin/rfkill unblock bluetooth
+      sleep 0.5
+      ${pkgs.bluez}/bin/bluetoothctl power on
+      sleep 1
+    fi
+
+    # Build list of paired devices with connection status
+    devices=""
+    while IFS= read -r line; do
+      mac=$(echo "$line" | ${pkgs.gawk}/bin/awk '{print $2}')
+      name=$(echo "$line" | cut -d' ' -f3-)
+      [ -z "$mac" ] && continue
+
+      # Check if connected
+      info=$(${pkgs.bluez}/bin/bluetoothctl info "$mac" 2>/dev/null)
+      connected=$(echo "$info" | ${pkgs.gnugrep}/bin/grep "Connected:" | ${pkgs.gawk}/bin/awk '{print $2}')
+      if [ "$connected" = "yes" ]; then
+        devices="''${devices}[connected] $name\n"
+      else
+        devices="''${devices}$name\n"
+      fi
+    done < <(${pkgs.bluez}/bin/bluetoothctl devices Paired)
+
+    devices="''${devices}Open Bluetooth Manager"
+
+    # Show fzf menu
+    choice=$(printf "%b" "$devices" | ${pkgs.fzf}/bin/fzf --prompt="Bluetooth > " --reverse --no-info)
+    [ -z "$choice" ] && exit 0
+
+    if [ "$choice" = "Open Bluetooth Manager" ]; then
+      ${pkgs.blueman}/bin/blueman-manager &
+      exit 0
+    fi
+
+    # Extract device name (strip [connected] prefix if present)
+    device_name="''${choice#\[connected\] }"
+
+    # Find MAC address for the device
+    mac=$(${pkgs.bluez}/bin/bluetoothctl devices Paired | ${pkgs.gnugrep}/bin/grep "$device_name" | ${pkgs.gawk}/bin/awk '{print $2}')
+    [ -z "$mac" ] && exit 1
+
+    if [[ "$choice" == \[connected\]* ]]; then
+      echo "Disconnecting $device_name..."
+      ${pkgs.bluez}/bin/bluetoothctl disconnect "$mac"
+    else
+      echo "Connecting to $device_name..."
+      ${pkgs.bluez}/bin/bluetoothctl connect "$mac"
+    fi
+
+    sleep 1
+  '';
+in
+{
+  environment.systemPackages = [
+    waybar-bluetooth
+    bluetooth-toggle
+    bluetooth-connect-menu
+  ];
+}