优化 Bun 安装脚本，支持多架构下载

.gitea/workflows/package.yml

@@ -56,7 +56,27 @@ jobs:
 
       - name: Install Bun
         run: |
-          GITHUB="https://ghproxy.net/https://github.com" curl -fsSL https://bun.sh/install | bash
+            case "$(uname -m)" in
+              x86_64)
+                BUN_ARCH="x64"
+                ;;
+              aarch64|arm64)
+                BUN_ARCH="aarch64"
+                ;;
+              *)
+                echo "Unsupported architecture: $(uname -m)"
+                exit 1
+                ;;
+            esac
+
+            BUN_ASSET="bun-linux-${BUN_ARCH}.zip"
+            BUN_MIRROR_URL="https://ghproxy.net/https://github.com/oven-sh/bun/releases/latest/download/${BUN_ASSET}"
+
+            curl -fL --retry 3 --retry-delay 5 "$BUN_MIRROR_URL" -o /tmp/bun.zip
+            rm -rf "$HOME/.bun"
+            mkdir -p "$HOME/.bun/bin"
+            unzip -qo /tmp/bun.zip -d /tmp
+            install -m 0755 "/tmp/bun-linux-${BUN_ARCH}/bun" "$HOME/.bun/bin/bun"
           echo "$HOME/.bun/bin" >> "$GITHUB_PATH"
 
       - name: Install dependencies