fix(1panel): sync MySQL/Redis container hosts on nx update

Upgrade was skipping 1panel-network detection; wizard now overrides stale host.docker.internal from volume/API defaults.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/api/install.py

@@ -33,6 +33,7 @@ ENV_FILE = ROOT_DIR / ".env"
 INSTALL_LOCK = ROOT_DIR / ".install_locked"
 CONFIG_DIR = ROOT_DIR / "web" / "data"
 CONFIG_JSON = CONFIG_DIR / "config.json"
+ONEPANEL_HOSTS_JSON = CONFIG_DIR / "1panel-hosts.json"
 STATE_FILE = ROOT_DIR / ".install_state.json"
 
 
@@ -98,10 +99,27 @@ def _build_redis_url(req: InitDbRequest) -> str:
     return url
 
 
+def _read_1panel_hosts_file() -> dict[str, str]:
+    if not ONEPANEL_HOSTS_JSON.is_file():
+        return {}
+    import json
+
+    try:
+        raw = json.loads(read_utf8_text(ONEPANEL_HOSTS_JSON))
+    except (json.JSONDecodeError, OSError):
+        return {}
+    if not isinstance(raw, dict):
+        return {}
+    return {str(k): str(v) for k, v in raw.items() if v}
+
+
 def _onepanel_service_host(kind: str) -> str | None:
-    """1Panel App Store container name (NEXUS_1PANEL_DB_HOST / REDIS_HOST)."""
+    """1Panel App Store container name (env → web/data/1panel-hosts.json)."""
     val = os.environ.get(f"NEXUS_1PANEL_{kind}_HOST", "").strip()
-    return val or None
+    if val:
+        return val
+    file_key = "db_host" if kind == "DB" else "redis_host"
+    return _read_1panel_hosts_file().get(file_key) or None
 
 
 def _resolve_redis_probe() -> tuple[str, int, str | None]: