chore: initial baseline before refactoring

Initial snapshot of Home Assistant config (HAOS 2026.4.4)
prior to dashboard restructuring and helper YAML migration.

Pre-commit cleanup applied:
- Removed blueprints/switch_manager/ (9.4 MB stale, component already gone)
- Removed .storage/switch_manager
- Removed home-assistant.log.{1,old,fault}
- Removed zigbee2mqtt/configuration_backup_v{1..4}.yaml
- Removed zigbee2mqtt/database.db.tmp.2024-09-27 (1.5y old)
- Created empty themes/ to satisfy configuration.yaml include

.gitignore uses allowlist strategy for .storage/ to keep
all tokens, keys, and PINs out of version control.

blueprints/automation/sagilo/ha_blueprint_notify_entity_became_unavailable.yaml

@@ -0,0 +1,49 @@
+blueprint:
+  name: Notify when an entity becomes unavailable
+  description: Notify via a selected service when an entity becomes unavailable (version
+    1.0)
+  source_url: https://gist.github.com/sagilo/9c5f85794fa8ee3427e7cdab27f573f5
+  domain: automation
+  input:
+    entities_filter_regex:
+      name: Entities filter
+      description: Optional, whitelist filter entities by regex, leave empty to include
+        all entities. Can be a domain, an entity name or both, for example 'sensor.'
+        for sensors or for example 'sensor|light.main_light' for all sensors and 'main_light'
+        entity
+      default: ''
+    actions:
+      name: Actions
+      description: Notifications or similar to execute, {{ trigger.event.data.entity_id
+        }} is replaced with the unavailable entitiy name.
+      selector:
+        action: {}
+    max_queued:
+      name: Maximum queued notifications
+      description: A number, in case of multiple events, what should be the queue
+        max depth, defaults to 10
+      default: 10
+      selector:
+        number:
+          min: 1.0
+          max: 100.0
+          step: 1.0
+          mode: slider
+variables:
+  filter: !input entities_filter_regex
+alias: Notify if an entity becomes unavailable
+description: ''
+trigger:
+- platform: event
+  event_type: state_changed
+  event_data: {}
+condition:
+- condition: template
+  value_template: '{{ trigger.event.data.entity_id |regex_search(filter, ignorecase=False)
+    and  trigger.event.data.new_state.state == ''unavailable'' and  trigger.event.data.old_state.state
+    != ''unknown'' }}'
+action:
+- choose: []
+  default: !input actions
+mode: queued
+max: !input max_queued