fix: isolate Gitea installer from GitHub

deploy/upgrade-agent.sh

@@ -2,12 +2,12 @@
 set -euo pipefail
 
 # VPS-Commander Agent 一键安全升级脚本
-# Repo: https://github.com/kyaring/vps-commander
+# Repo: https://gitea.king.nyc.mn/openclaw/vps-commander
 
 REPO="kyaring/vps-commander"
 INSTALL_DIR="/opt/vps-commander"
-GITHUB_URL="https://github.com"
-API_URL="https://api.github.com"
+GITEA_URL="https://gitea.king.nyc.mn"
+API_URL="https://gitea.king.nyc.mn/api/v1"
 
 RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'; BLUE='\033[0;34m'; NC='\033[0m'
 info() { echo -e "${BLUE}[INFO]${NC} $*"; }
@@ -31,12 +31,12 @@ info "正在获取最新正式 Release 版本信息..."
 LATEST_TAG=$(curl -fsSL --proto '=https' --proto-redir '=https' --retry 3 --connect-timeout 15 --max-time 30 \
     "${API_URL}/repos/${REPO}/releases/latest" |
     sed -n 's/^[[:space:]]*"tag_name": "\\([^"]*\\)".*/\\1/p' | head -n1)
-[ -n "$LATEST_TAG" ] || error "无法从 GitHub 获取最新正式 Release，已停止升级；不会回退到旧版本"
+[ -n "$LATEST_TAG" ] || error "无法从 Gitea 获取最新正式 Release，已停止升级；不会回退到旧版本"
 info "目标升级版本: ${LATEST_TAG} (${TARGET_ARCH})"
 
 BIN_NAME="vps-commander-agent-linux-${TARGET_ARCH}"
-DOWNLOAD_URL="${GITHUB_URL}/${REPO}/releases/download/${LATEST_TAG}/${BIN_NAME}"
-CHECKSUM_URL="${GITHUB_URL}/${REPO}/releases/download/${LATEST_TAG}/checksums.txt"
+DOWNLOAD_URL="${GITEA_URL}/${REPO}/releases/download/${LATEST_TAG}/${BIN_NAME}"
+CHECKSUM_URL="${GITEA_URL}/${REPO}/releases/download/${LATEST_TAG}/checksums.txt"
 TMP_BIN=$(mktemp "${INSTALL_DIR}/vps-commander-agent.tmp.XXXXXX") || error "无法创建临时文件"
 TMP_SUM=$(mktemp "${INSTALL_DIR}/vps-commander-checksums.tmp.XXXXXX") || { rm -f "$TMP_BIN"; error "无法创建校验文件"; }
 BAK_BIN="${INSTALL_DIR}/vps-commander-agent.bak"