domain cutover (host side): oc.ci host + recipe-report URLs + cc-ci input to c5106bc

- opencode UI: opencodeUiHost=oc.ci.autonomic.zone with the legacy name kept via the new
  opencodeUiExtraHosts (dual traefik router rule + nginx serverAliases) during the bake.
- networking.hosts: new names pinned, legacy names kept.
- recipe-report.py: publish/verify/footer URLs → report.ci.autonomic.zone.
- flake.lock: cc-ci input → c5106bc (PR #39 + #40: dual-zone SAN cert, front-door rules,
  drone rename, harness naming).

nix/modules/orchestrator-host.nix

@@ -62,6 +62,16 @@ in
       description = "nginx server_name for the opencode web UI (TLS + basic auth).";
     };
 
+    opencodeUiExtraHosts = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      description = ''
+        Extra hostnames routed to the opencode UI alongside opencodeUiHost, rendered as
+        `||`-joined Host conditions on the same router. Domain cutover 2026-09: the
+        legacy oc.ci.commoninternet.net keeps answering here during the bake window.
+      '';
+    };
+
     opencodeUiHtpasswdFile = lib.mkOption {
       type = lib.types.str;
       default = "/secrets/nginx/oc-htpasswd";
@@ -216,6 +226,7 @@ SSHCFG
       recommendedProxySettings = true;
       virtualHosts.${cfg.opencodeUiHost} = {
         listen = [ { addr = "0.0.0.0"; port = cfg.opencodeUiBackendPort; } ];
+        serverAliases = cfg.opencodeUiExtraHosts;
         basicAuthFile = cfg.opencodeUiHtpasswdFile;
         extraConfig = ''
           # traefik sits on the docker networks (ingress 10.0.0.0/24, gwbridge 172.18.0.0/16)
@@ -256,7 +267,7 @@ SSHCFG
                 replicas: 1
                 labels:
                   - "traefik.enable=true"
-                  - "traefik.http.routers.opencode-ui.rule=Host(`${cfg.opencodeUiHost}`)"
+                  - "traefik.http.routers.opencode-ui.rule=${lib.concatStringsSep " || " (map (h: "Host(`${h}`)") ([ cfg.opencodeUiHost ] ++ cfg.opencodeUiExtraHosts))}"
                   - "traefik.http.routers.opencode-ui.entrypoints=web-secure"
                   - "traefik.http.routers.opencode-ui.tls=true"
                   - "traefik.http.services.opencode-ui.loadbalancer.server.port=${toString cfg.opencodeUiBackendPort}"