feat(network): make interfaces[] canonical, normalize flat fields as AWX compat

roles/global_defaults/tasks/system.yml

@@ -16,7 +16,7 @@
     fail_msg: "system and its nested keys (network, user, root, luks, features) must be dictionaries."
     quiet: true
 
-- name: Validate DNS and user.key are lists (not strings)
+- name: Validate DNS and user.keys are lists (not strings)
   when: system.network is defined and system.network.dns is defined
   ansible.builtin.assert:
     that:
@@ -25,12 +25,12 @@
     fail_msg: "system.network.dns.servers and system.network.dns.search must be lists, not strings."
     quiet: true
 
-- name: Validate user.key is a list
-  when: system.user is defined and system.user.key is defined
+- name: Validate user.keys is a list
+  when: system.user is defined and system.user.keys is defined
   ansible.builtin.assert:
     that:
-      - system.user.key is iterable and system.user.key is not string
-    fail_msg: "system.user.key must be a list of SSH public key strings."
+      - system.user.keys is iterable and system.user.keys is not string
+    fail_msg: "system.user.keys must be a list of SSH public key strings."
     quiet: true
 
 - name: Validate system features input types
@@ -88,6 +88,27 @@
         dns:
           servers: "{{ system_raw.network.dns.servers | default([]) }}"
           search: "{{ system_raw.network.dns.search | default([]) }}"
+        interfaces: >-
+          {{
+            system_raw.network.interfaces
+            if (system_raw.network.interfaces | default([]) | length > 0)
+            else (
+              [{
+                'name': 'eth0',
+                'bridge': system_raw.network.bridge | default('') | string,
+                'vlan': system_raw.network.vlan | default('') | string,
+                'ip': system_raw.network.ip | default('') | string,
+                'prefix': (
+                  (system_raw.network.prefix | int | string)
+                  if (system_raw.network.prefix | default('') | string | length) > 0
+                  else ''
+                ),
+                'gateway': system_raw.network.gateway | default('') | string
+              }]
+              if (system_raw.network.bridge | default('') | string | length > 0)
+              else []
+            )
+          }}
       path: "{{ system_raw.path | default('') | string }}"
       packages: >-
         {{
@@ -104,7 +125,7 @@
       user:
         name: "{{ system_raw.user.name | string }}"
         password: "{{ system_raw.user.password | string }}"
-        key: "{{ system_raw.user.key | default([]) }}"
+        keys: "{{ system_raw.user.keys | default([]) }}"
       root:
         password: "{{ system_raw.root.password | string }}"
       luks:
@@ -150,6 +171,25 @@
     os: "{{ system_os_input if system_os_input | length > 0 else ('archlinux' if system_type == 'physical' else '') }}"
     os_version: "{{ system_raw.version | default('') | string }}"
 
+- name: Populate primary network fields from first interface
+  when:
+    - system_cfg.network.interfaces | length > 0
+    - system_cfg.network.bridge | default('') | string | length == 0
+  vars:
+    _primary: "{{ system_cfg.network.interfaces[0] }}"
+  ansible.builtin.set_fact:
+    system_cfg: >-
+      {{
+        system_cfg | combine({
+          'network': system_cfg.network | combine({
+            'bridge': _primary.bridge | default(''),
+            'vlan': _primary.vlan | default(''),
+            'ip': _primary.ip | default(''),
+            'prefix': _primary.prefix | default(''),
+            'gateway': _primary.gateway | default('')
+          })
+        }, recursive=True)
+      }}
 
 - name: Normalize system disks input
   vars: