fix: recursively search for package_config.json to support workspace resolution

lib/pipeline/render/impl/template/template_loader.dart

@@ -87,9 +87,27 @@ class TemplateLoader {
     final dirs = <String>[];
 
     try {
-      // 尝试从 .dart_tool/package_config.json 解析包路径
-      final packageConfigFile = File('.dart_tool/package_config.json');
-      if (!packageConfigFile.existsSync()) {
+      // 递归向上查找 .dart_tool/package_config.json
+      File? packageConfigFile;
+      var currentDir = Directory.current;
+      const maxDepth = 6; // 增加搜索深度以支持 monorepo
+      var depth = 0;
+
+      while (depth < maxDepth) {
+        final checkFile =
+            File(p.join(currentDir.path, '.dart_tool', 'package_config.json'));
+        if (checkFile.existsSync()) {
+          packageConfigFile = checkFile;
+          break;
+        }
+
+        final parent = currentDir.parent;
+        if (parent.path == currentDir.path) break;
+        currentDir = parent;
+        depth++;
+      }
+
+      if (packageConfigFile == null) {
         return dirs;
       }
 
@@ -103,7 +121,7 @@ class TemplateLoader {
       );
 
       if (package != null) {
-        final rootUri = package['rootUri'] as String;
+        var rootUri = package['rootUri'] as String;
         String packagePath;
 
         // 处理 file:// 协议
@@ -117,18 +135,27 @@ class TemplateLoader {
 
         // 如果不是绝对路径，需要相对于 .dart_tool/package_config.json 所在目录解析
         if (!p.isAbsolute(packagePath)) {
-          // package_config.json 在 .dart_tool 目录下
-          packagePath = p.normalize(p.join('.dart_tool', packagePath));
+          // package_config.json 在 packageConfigFile.parent 目录下 (.dart_tool)
+          packagePath =
+              p.normalize(p.join(packageConfigFile.parent.path, packagePath));
         }
 
         // 添加模板目录路径
-        final templateDir = p.join(packagePath, 'lib', 'templates');
+        // 1. 尝试 lib/templates (标准包结构)
+        var templateDir = p.join(packagePath, 'lib', 'templates');
         if (Directory(templateDir).existsSync()) {
           dirs.add(templateDir);
+        } else {
+          // 2. 尝试 templates (本地调试或非标准结构)
+          templateDir = p.join(packagePath, 'templates');
+          if (Directory(templateDir).existsSync()) {
+            dirs.add(templateDir);
+          }
         }
       }
-    } catch (_) {
+    } catch (e) {
       // 忽略错误，返回空列表
+      print('Warning: Failed to load package templates: $e');
     }
 
     return dirs;