fix: 修复多工具链环境下包格式检测误判，优先基于发行版识别 (#8)

- 重构 scripts/package.sh 的 detect_package_format()，优先读取
  /etc/os-release 识别发行版（Fedora/RHEL → rpm，Debian/Ubuntu → deb，
  Arch → pacman），工具链探测降级为 fallback
- 重构 scripts/install-package.sh 的安装逻辑，新增 detect_install_format()
  同样优先基于发行版判断，避免非 Debian 分支系统上安装了 dpkg 导致误用 deb 格式

Author: JipZeonGit

scripts/install-package.sh

@@ -47,16 +47,38 @@ install_pacman() {
     sudo pacman -U --noconfirm "$artifact"
 }
 
-main() {
-    if command -v dpkg >/dev/null 2>&1 && install_deb; then
-        return 0
-    fi
-    if install_rpm; then
-        return 0
+detect_install_format() {
+    if [ -f /etc/os-release ]; then
+        local id id_like
+        . /etc/os-release
+        id_like="${ID_LIKE:-$ID}"
+        case "$ID $id_like" in
+            *fedora*|*rhel*|*centos*|*rocky*|*alma*|*suse*) echo "rpm"; return 0 ;;
+            *debian*|*ubuntu*|*mint*) echo "deb"; return 0 ;;
+            *arch*|*manjaro*) echo "pacman"; return 0 ;;
+        esac
     fi
-    if install_pacman; then
-        return 0
+    # Fallback
+    if command -v dpkg >/dev/null 2>&1; then echo "deb"
+    elif command -v rpm >/dev/null 2>&1; then echo "rpm"
+    elif command -v pacman >/dev/null 2>&1; then echo "pacman"
     fi
+}
+
+main() {
+    local fmt
+    fmt="$(detect_install_format)"
+
+    case "$fmt" in
+        deb) install_deb && return 0 ;;
+        rpm) install_rpm && return 0 ;;
+        pacman) install_pacman && return 0 ;;
+    esac
+
+    # Ultimate fallback: try all in order
+    if install_rpm; then return 0; fi
+    if install_deb; then return 0; fi
+    if install_pacman; then return 0; fi
 
     error "No installable package artifact found in dist/. Run make package first."
 }

scripts/package.sh

@@ -7,6 +7,28 @@ REPO_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 . "$REPO_DIR/scripts/lib/common.sh"
 
 detect_package_format() {
+    # 1. 优先基于发行版识别（/etc/os-release 是 systemd/Linux 标准规范）
+    if [ -f /etc/os-release ]; then
+        local id id_like
+        . /etc/os-release
+        id_like="${ID_LIKE:-$ID}"
+        case "$ID $id_like" in
+            *fedora*|*rhel*|*centos*|*rocky*|*alma*|*suse*)
+                if command -v rpmbuild >/dev/null 2>&1; then
+                    echo "rpm"; return 0
+                fi ;;
+            *debian*|*ubuntu*|*mint*)
+                if command -v dpkg-deb >/dev/null 2>&1 && command -v dpkg >/dev/null 2>&1; then
+                    echo "deb"; return 0
+                fi ;;
+            *arch*|*manjaro*)
+                if command -v makepkg >/dev/null 2>&1; then
+                    echo "pacman"; return 0
+                fi ;;
+        esac
+    fi
+
+    # 2. Fallback: 无法通过发行版判断时探测工具链
     if command -v dpkg-deb >/dev/null 2>&1 && command -v dpkg >/dev/null 2>&1; then
         echo "deb"
     elif command -v rpmbuild >/dev/null 2>&1; then