🐛 fix(workflow): 提高 Rust 环境初始化兼容性

- 用纯 shell 逻辑替换 PATH 过滤中的 awk 写法，避免不同 runner 上的 awk 语法差异
- 保持优先系统工具链、跳过 ~/.cargo/bin 的策略不变
- 修复安装 Rust 步骤在 shell 解析阶段直接失败的问题

.gitea/workflows/release.yml

@@ -60,8 +60,21 @@ jobs:
       - name: 安装 Rust
         run: |
           set -eux
-          PATH_WITHOUT_CARGO_BIN="$(printf '%s' "$PATH" | awk -v RS=: -v ORS=: '$0 != ENVIRON["HOME"] \"/.cargo/bin\" { print }' | sed 's/:$//')"
-          export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin${PATH_WITHOUT_CARGO_BIN:+:$PATH_WITHOUT_CARGO_BIN}"
+          PATH_BASE="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+          PATH_EXTRA=""
+          OLD_IFS="$IFS"
+          IFS=':'
+          set -- $PATH
+          IFS="$OLD_IFS"
+          for entry in "$@"; do
+            [ -n "$entry" ] || continue
+            [ "$entry" = "$HOME/.cargo/bin" ] && continue
+            case ":$PATH_BASE:$PATH_EXTRA:" in
+              *":$entry:"*) continue ;;
+            esac
+            PATH_EXTRA="${PATH_EXTRA:+$PATH_EXTRA:}$entry"
+          done
+          export PATH="$PATH_BASE${PATH_EXTRA:+:$PATH_EXTRA}"
           if ! command -v cargo >/dev/null 2>&1 || ! command -v rustc >/dev/null 2>&1; then
             [ -f "$HOME/.cargo/env" ] && . "$HOME/.cargo/env"
           fi
@@ -78,8 +91,21 @@ jobs:
       - name: 构建发布包
         run: |
           set -eux
-          PATH_WITHOUT_CARGO_BIN="$(printf '%s' "$PATH" | awk -v RS=: -v ORS=: '$0 != ENVIRON["HOME"] \"/.cargo/bin\" { print }' | sed 's/:$//')"
-          export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin${PATH_WITHOUT_CARGO_BIN:+:$PATH_WITHOUT_CARGO_BIN}"
+          PATH_BASE="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+          PATH_EXTRA=""
+          OLD_IFS="$IFS"
+          IFS=':'
+          set -- $PATH
+          IFS="$OLD_IFS"
+          for entry in "$@"; do
+            [ -n "$entry" ] || continue
+            [ "$entry" = "$HOME/.cargo/bin" ] && continue
+            case ":$PATH_BASE:$PATH_EXTRA:" in
+              *":$entry:"*) continue ;;
+            esac
+            PATH_EXTRA="${PATH_EXTRA:+$PATH_EXTRA:}$entry"
+          done
+          export PATH="$PATH_BASE${PATH_EXTRA:+:$PATH_EXTRA}"
           if ! command -v cargo >/dev/null 2>&1 || ! command -v rustc >/dev/null 2>&1; then
             [ -f "$HOME/.cargo/env" ] && . "$HOME/.cargo/env"
           fi