feat(core): migrate system state to unified declarative JSON

- Consolidate all configuration toggles (suspend, idle, waybar, etc.) into ~/.config/home-manager/state.json
- Introduce nomarchy.toggles and nomarchy.hyprland options in Nix
- Inject toggle states into all bin/ scripts via environment variables
- Update toggle scripts to mutate JSON and trigger background rebuilds
- Add a migration script to transition legacy flag files to the new format

bin/nomarchy-toggle-nightlight

@@ -1,36 +1,25 @@
 #!/usr/bin/env bash
 
-# Toggles the nightlight (hyprsunset) between enabled (4000) and disabled (6500)
-# Declarative + Hybrid (instant IPC) for Nomarchy NixOS.
+# Toggles the nightlight (hyprsunset).
+# Hybrid: updates state.json and provides instant feedback.
 
-STATE_FILE="$HOME/.config/home-manager/hyprsunset-state.json"
+STATE_FILE="$HOME/.config/home-manager/state.json"
 mkdir -p "$(dirname "$STATE_FILE")"
 
-if [ ! -f "$STATE_FILE" ]; then
-    echo '{"enabled": false, "temperature": 4000}' > "$STATE_FILE"
-fi
+# Initialize if doesn't exist
+[[ ! -f $STATE_FILE ]] && echo "{}" > "$STATE_FILE"
 
-enabled=$(jq -r '.enabled' "$STATE_FILE")
-
-if [[ $enabled == "true" ]]; then
-    NEW_ENABLED="false"
-    TEMP=6500
-    notify-send -u low "  Nightlight DISABLED"
+if [[ $NOMARCHY_TOGGLE_NIGHTLIGHT == "false" ]]; then
+    NEW_VALUE="true"
+    hyprctl dispatch exec hyprsunset --temperature 4000
+    notify-send -u low "󰔎  Nightlight enabled"
 else
-    NEW_ENABLED="true"
-    TEMP=4000
-    notify-send -u low "  Nightlight ENABLED"
+    NEW_VALUE="false"
+    pkill hyprsunset
+    notify-send -u low "󰔎  Nightlight disabled"
 fi
 
-# Instant feedback via IPC
-if pgrep -x hyprsunset >/dev/null; then
-    hyprctl hyprsunset temperature $TEMP
-else
-    # Should be started by systemd, but just in case
-    setsid hyprsunset -t $TEMP &
-fi
+TMP_JSON=$(mktemp)
+jq ".nightlight = $NEW_VALUE" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
 
-echo "{\"enabled\": $NEW_ENABLED, \"temperature\": 4000}" > "$STATE_FILE"
-echo "Nightlight set to $NEW_ENABLED ($TEMP) declaratively."
-# No need to run env-update if we don't want the delay, 
-# as next HM switch will pick it up and apply it.
+echo "Nightlight state set to $NEW_VALUE. Environment will be fully updated on next rebuild."