Add multi-plug toggle, debounce via unique topic subscriptions

Button (Door Button) now toggles Squiggle, Sideboard Lamp, and Bamboo Lights
via three parallel mqtt-out publishes.

Key fix: avoid subscribing to a wildcard '#' topic alongside a specific topic
in the same Node-RED instance. The mqtt-broker re-adds its handler as an
EventEmitter listener on each subscribe call (file:
  /usr/src/node-red/node_modules/@node-red/nodes/core/network/10-mqtt.js
  _clientOn('message', subscription.handler) is unconditional), so after
each deploy/restart the same message arrives N times to internal listeners.
Each mqtt-in node now uses a unique topic (zigbee2mqtt/<device>).

Removed zigbee-in # wildcard and plug-state ui-text widgets (state now
displayed via per-plug ui-text widgets).

Added function node support to flow2json.py for msg filtering logic.
Added ui-text format/width/height defaults support.
Added dashboard 2.0 config node defaults matching reference flow:
  ui-base, ui-theme, ui-page, ui-group with full property set.

flows/zigbee-monitor.yaml

@@ -5,44 +5,112 @@ brokers:
     host: mosquitto
     port: 1883
 
+plugs:
+  - Squiggle
+  - Sideboard Lamp
+  - Bamboo Lights
+
 dashboards:
-  - tab: Home
-    icon: dashboard
-    groups:
-      - name: Zigbee
-        width: 6
+  - base: Dashboard
+    pages:
+      - page: Home
+        icon: home
+        path: /home
+        groups:
+          - name: Plugs
+            width: 6
 
 flows:
   - tab: Zigbee Monitor
     description: Monitor and control zigbee2mqtt coordinator
     nodes:
-      - id: zigbee-in
-        type: mqtt-in
+      - id: zigbee-state-squiggle
+        type: mqtt in
         broker: mosquitto
-        topic: zigbee2mqtt/#
-        qos: 2
+        topic: zigbee2mqtt/Squiggle
+        qos: 0
 
-      - id: debug
-        type: debug
+      - id: zigbee-state-sideboard
+        type: mqtt in
+        broker: mosquitto
+        topic: zigbee2mqtt/Sideboard Lamp
+        qos: 0
 
-      - id: last-msg
+      - id: zigbee-state-bamboo
+        type: mqtt in
+        broker: mosquitto
+        topic: zigbee2mqtt/Bamboo Lights
+        qos: 0
+
+      - id: button-in
+        type: mqtt in
+        broker: mosquitto
+        topic: zigbee2mqtt/Door Button
+        qos: 0
+
+      - id: btn-filter
+        type: function
+        name: Single press only
+        code: |
+          try {
+            const p = JSON.parse(msg.payload);
+            if (p.action === 'single') {
+              msg.payload = { state: 'TOGGLE' };
+              return msg;
+            }
+          } catch (e) {}
+          return null;
+
+      - id: plug-out-squiggle
+        type: mqtt out
+        broker: mosquitto
+        topic: zigbee2mqtt/Squiggle/set
+
+      - id: plug-out-sideboard
+        type: mqtt out
+        broker: mosquitto
+        topic: zigbee2mqtt/Sideboard Lamp/set
+
+      - id: plug-out-bamboo
+        type: mqtt out
+        broker: mosquitto
+        topic: zigbee2mqtt/Bamboo Lights/set
+
+      - id: text-squiggle
         type: ui-text
-        group: Zigbee
-        format: "{{msg.payload|json}}"
+        group: Plugs
+        label: Squiggle
+        format: "{{msg.payload.state}}"
+
+      - id: text-sideboard
+        type: ui-text
+        group: Plugs
+        label: Sideboard Lamp
+        format: "{{msg.payload.state}}"
+
+      - id: text-bamboo
+        type: ui-text
+        group: Plugs
+        label: Bamboo Lights
+        format: "{{msg.payload.state}}"
 
       - id: permit-btn
         type: ui-button
-        group: Zigbee
-        label: "Permit Join (60s)"
+        group: Plugs
+        label: Permit Join (60s)
         topic: zigbee2mqtt/bridge/request/permit_join
         payload:
           value: true
           time: 60
 
       - id: mqtt-out
-        type: mqtt-out
+        type: mqtt out
         broker: mosquitto
 
     wires:
-      zigbee-in: [debug, last-msg]
+      zigbee-state-squiggle: [text-squiggle]
+      zigbee-state-sideboard: [text-sideboard]
+      zigbee-state-bamboo: [text-bamboo]
+      button-in: [btn-filter]
+      btn-filter: [plug-out-squiggle, plug-out-sideboard, plug-out-bamboo]
       permit-btn: [mqtt-out]