fix homeassistant configuration.yaml not being writable

homeassistant/homeassistant.yaml

@@ -66,9 +66,6 @@ spec:
         volumeMounts:
         - name: config
           mountPath: /config
-        - name: configuration
-          mountPath: /config/configuration.yaml
-          subPath: configuration.yaml
         - name: localtime
           mountPath: /etc/localtime
           readOnly: true
@@ -82,6 +79,28 @@ spec:
               - NET_ADMIN
               - NET_RAW
               - SYS_ADMIN
+      # Seed configuration.yaml from the ConfigMap onto the writable PVC so that
+      # Home Assistant has a writable configuration.yaml (required for the UI to
+      # create/save scripts, helpers, reloads, etc.). The ConfigMap stays the
+      # GitOps source of truth: it is re-copied on every pod start. UI-managed
+      # entities (scripts, automations, integrations) live in /config/.storage
+      # on the PVC and are never overwritten by this step.
+      initContainers:
+      - name: seed-config
+        image: busybox:1.36
+        command: ["/bin/sh", "-c"]
+        args:
+          - |
+            set -e
+            echo "Seeding /config/configuration.yaml from ConfigMap..."
+            cp /config-cm/configuration.yaml /config/configuration.yaml
+            echo "Done."
+        volumeMounts:
+        - name: config
+          mountPath: /config
+        - name: configuration
+          mountPath: /config-cm
+          readOnly: true
       hostNetwork: true
       volumes:
         - name: config