fix(ci): replace python3 with sed/grep in deploy step containers

The nas runner's deploy container lacks python3. Replaced:
- compose networks stripping: python3 -> sed
- network verification: python3 -> grep
- Removed broken --dns and --add-host options from deploy container

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -178,7 +178,6 @@ jobs:
       GITEA_DB_PASSWORD: nyM3P4v1aYAsT7zfUtdguImNVHgFltCKCY/OjzWZVRE=
     container:
       network: gitea_gitea
-      options: --add-host=host.docker.internal:host-gateway --dns 192.168.31.1 --dns 8.8.8.8
       volumes:
         - /var/packages/ContainerManager/target/usr/bin/docker:/usr/bin/docker
         - /volume1/docker/nas-dashboard:/nas-dashboard
@@ -263,30 +262,7 @@ jobs:
           if ! docker container inspect nas-dashboard >/dev/null 2>&1; then
             echo "Compose failed, stripping networks and retrying..."
             docker rm -f docker-socket-proxy nas-dashboard 2>/dev/null || true
-            python3 -c "
-          import os
-          lines = open('/nas-dashboard/docker-compose.yml').readlines()
-          out = []
-          skip_net = False
-          for l in lines:
-              stripped = l.strip()
-              if stripped == 'networks:' and not l[0].isspace():
-                  skip_net = True
-                  continue
-              if skip_net:
-                  if l[0].isspace():
-                      continue
-                  skip_net = False
-              if stripped == 'networks:' and l[:4].strip() == '':
-                  skip_net = True
-                  continue
-              if skip_net:
-                  if l.startswith('      '):
-                      continue
-                  skip_net = False
-              out.append(l)
-          open('/nas-dashboard/prod-ci.yml','w').writelines(out)
-          "
+            sed '/^networks:/,$d' /nas-dashboard/docker-compose.yml > /nas-dashboard/prod-ci.yml
             docker compose -f /nas-dashboard/prod-ci.yml up -d --pull never 2>&1 || true
           fi
 
@@ -351,7 +327,13 @@ jobs:
 
           # Verify network connections
           echo "=== Network connections ==="
-          docker inspect nas-dashboard --format '{{json .NetworkSettings.Networks}}' | python3 -c 'import json,sys;nets=json.load(sys.stdin);[print(f"  Connected to {n}") for n in nets];assert "nas-dashboard_internal" in nets, "Missing nas-dashboard_internal";print("All network connections established")'
+          if docker inspect nas-dashboard --format '{{json .NetworkSettings.Networks}}' | grep -q 'nas-dashboard_internal'; then
+            echo "  Connected to nas-dashboard_internal"
+            echo "All network connections established"
+          else
+            echo "❌ Missing nas-dashboard_internal network"
+            exit 1
+          fi
 
           # Wait for container to be healthy
           echo "Waiting for container to be healthy..."