Simplify HA dev config to work with core-only Nix package

- Remove frontend dependencies that aren't in Nix package
- Use minimal config with just HTTP, API, and MQTT
- Prepare for either Docker alternative or core-only testing

dev-config/.HA_VERSION

@@ -0,0 +1 @@
+2025.7.4

dev-config/blueprints/automation/homeassistant/motion_light.yaml

@@ -0,0 +1,58 @@
+blueprint:
+  name: Motion-activated Light
+  description: Turn on a light when motion is detected.
+  domain: automation
+  source_url: https://github.com/home-assistant/core/blob/dev/homeassistant/components/automation/blueprints/motion_light.yaml
+  author: Home Assistant
+  input:
+    motion_entity:
+      name: Motion Sensor
+      selector:
+        entity:
+          filter:
+            - device_class: occupancy
+              domain: binary_sensor
+            - device_class: motion
+              domain: binary_sensor
+    light_target:
+      name: Light
+      selector:
+        target:
+          entity:
+            domain: light
+    no_motion_wait:
+      name: Wait time
+      description: Time to leave the light on after last motion is detected.
+      default: 120
+      selector:
+        number:
+          min: 0
+          max: 3600
+          unit_of_measurement: seconds
+
+# If motion is detected within the delay,
+# we restart the script.
+mode: restart
+max_exceeded: silent
+
+triggers:
+  trigger: state
+  entity_id: !input motion_entity
+  from: "off"
+  to: "on"
+
+actions:
+  - alias: "Turn on the light"
+    action: light.turn_on
+    target: !input light_target
+  - alias: "Wait until there is no motion from device"
+    wait_for_trigger:
+      trigger: state
+      entity_id: !input motion_entity
+      from: "on"
+      to: "off"
+  - alias: "Wait the number of seconds that has been set"
+    delay: !input no_motion_wait
+  - alias: "Turn off the light"
+    action: light.turn_off
+    target: !input light_target

dev-config/blueprints/automation/homeassistant/notify_leaving_zone.yaml

@@ -0,0 +1,50 @@
+blueprint:
+  name: Zone Notification
+  description: Send a notification to a device when a person leaves a specific zone.
+  domain: automation
+  source_url: https://github.com/home-assistant/core/blob/dev/homeassistant/components/automation/blueprints/notify_leaving_zone.yaml
+  author: Home Assistant
+  input:
+    person_entity:
+      name: Person
+      selector:
+        entity:
+          filter:
+            domain: person
+    zone_entity:
+      name: Zone
+      selector:
+        entity:
+          filter:
+            domain: zone
+    notify_device:
+      name: Device to notify
+      description: Device needs to run the official Home Assistant app to receive notifications.
+      selector:
+        device:
+          filter:
+            integration: mobile_app
+
+triggers:
+  trigger: state
+  entity_id: !input person_entity
+
+variables:
+  zone_entity: !input zone_entity
+  # This is the state of the person when it's in this zone.
+  zone_state: "{{ states[zone_entity].name }}"
+  person_entity: !input person_entity
+  person_name: "{{ states[person_entity].name }}"
+
+conditions:
+  condition: template
+  # The first case handles leaving the Home zone which has a special state when zoning called 'home'.
+  # The second case handles leaving all other zones.
+  value_template: "{{ zone_entity == 'zone.home' and trigger.from_state.state == 'home' and trigger.to_state.state != 'home' or trigger.from_state.state == zone_state and trigger.to_state.state != zone_state }}"
+
+actions:
+  - alias: "Notify that a person has left the zone"
+    domain: mobile_app
+    type: notify
+    device_id: !input notify_device
+    message: "{{ person_name }} has left {{ zone_state }}"

dev-config/blueprints/script/homeassistant/confirmable_notification.yaml

@@ -0,0 +1,86 @@
+blueprint:
+  name: Confirmable Notification
+  description: >-
+    A script that sends an actionable notification with a confirmation before
+    running the specified action.
+  domain: script
+  source_url: https://github.com/home-assistant/core/blob/master/homeassistant/components/script/blueprints/confirmable_notification.yaml
+  author: Home Assistant
+  input:
+    notify_device:
+      name: Device to notify
+      description: Device needs to run the official Home Assistant app to receive notifications.
+      selector:
+        device:
+          filter:
+            integration: mobile_app
+    title:
+      name: "Title"
+      description: "The title of the button shown in the notification."
+      default: ""
+      selector:
+        text:
+    message:
+      name: "Message"
+      description: "The message body"
+      selector:
+        text:
+    confirm_text:
+      name: "Confirmation Text"
+      description: "Text to show on the confirmation button"
+      default: "Confirm"
+      selector:
+        text:
+    confirm_action:
+      name: "Confirmation Action"
+      description: "Action to run when notification is confirmed"
+      default: []
+      selector:
+        action:
+    dismiss_text:
+      name: "Dismiss Text"
+      description: "Text to show on the dismiss button"
+      default: "Dismiss"
+      selector:
+        text:
+    dismiss_action:
+      name: "Dismiss Action"
+      description: "Action to run when notification is dismissed"
+      default: []
+      selector:
+        action:
+
+mode: restart
+
+sequence:
+  - alias: "Set up variables"
+    variables:
+      action_confirm: "{{ 'CONFIRM_' ~ context.id }}"
+      action_dismiss: "{{ 'DISMISS_' ~ context.id }}"
+  - alias: "Send notification"
+    domain: mobile_app
+    type: notify
+    device_id: !input notify_device
+    title: !input title
+    message: !input message
+    data:
+      actions:
+        - action: "{{ action_confirm }}"
+          title: !input confirm_text
+        - action: "{{ action_dismiss }}"
+          title: !input dismiss_text
+  - alias: "Awaiting response"
+    wait_for_trigger:
+      - trigger: event
+        event_type: mobile_app_notification_action
+        event_data:
+          action: "{{ action_confirm }}"
+      - trigger: event
+        event_type: mobile_app_notification_action
+        event_data:
+          action: "{{ action_dismiss }}"
+  - choose:
+      - conditions: "{{ wait.trigger.event.data.action == action_confirm }}"
+        sequence: !input confirm_action
+      - conditions: "{{ wait.trigger.event.data.action == action_dismiss }}"
+        sequence: !input dismiss_action

dev-config/configuration.yaml

@@ -8,40 +8,23 @@ homeassistant:
   unit_system: metric
   time_zone: UTC
 
-# Enable configuration UI
-config:
-
-# Enable frontend
-frontend:
-  themes: !include_dir_merge_named themes
+# Basic required components only
+http:
+  server_host: 0.0.0.0
+  server_port: 8123
 
 # Enable API
 api:
 
-# Enable system health
-system_health:
-
-# Enable mobile app support
-mobile_app:
-
-# MQTT Configuration (connect to existing mqtt.home broker)
-mqtt:
-  broker: mqtt.home
-  port: 1883
-  discovery: true
-  discovery_prefix: homeassistant
-
 # Enable logging
 logger:
   default: info
   logs:
     custom_components.systant: debug
-    homeassistant.components.mqtt: debug
 
-# Enable recorder with in-memory database for development
-recorder:
-  db_url: "sqlite:///:memory:"
-  purge_keep_days: 1
-
-# Enable default integrations
-default_config:
+# MQTT Configuration (for our integration testing)
+mqtt:
+  - broker: mqtt.home
+    port: 1883
+    discovery: true
+    discovery_prefix: homeassistant