feat(scenarios): 兼容非法配置并展示错误摘要

apps/scenarios/services.py

@@ -36,15 +36,15 @@ def _get_nested(config: dict, path: tuple[str, ...]):
 
 
 def validate_scenario(config: dict) -> dict:
-    # 只校验真正影响运行闭环的必填字段；
-    # 页面展示类字段如 applicable_questions 允许缺失，并在归一化阶段补默认值。
+    # 仅校验真正影响运行闭环的必填字段；
+    # 页面展示字段允许缺失，并在归一化阶段补默认值。
     for field_path in REQUIRED_FIELDS:
         _get_nested(config, field_path)
     return normalize_scenario(config)
 
 
 def normalize_scenario(config: dict) -> dict:
-    """补齐页面和其他模块常用的派生字段，减少模板中的条件判断。"""
+    """补齐页面和其它模块常用的派生字段，避免模板层重复判断。"""
     normalized = dict(config)
     normalized["applicable_questions"] = list(config.get("applicable_questions") or [])
     normalized["rag"] = dict(config.get("rag", {}))
@@ -62,16 +62,47 @@ def _scenario_files() -> list[Path]:
     return sorted([*config_dir.glob("*.yaml"), *config_dir.glob("*.yml")])
 
 
+def _read_yaml_file(path: Path) -> dict:
+    with path.open("r", encoding="utf-8") as file:
+        return yaml.safe_load(file) or {}
+
+
+def _collect_scenario_load_result() -> tuple[list[dict], list[dict]]:
+    """
+    统一读取配置目录中的所有场景文件。
+
+    返回值：
+    - scenarios: 校验通过的场景列表
+    - issues: 非法 YAML / 缺字段等错误摘要，供首页展示
+    """
+    scenarios = []
+    issues = []
+    for path in _scenario_files():
+        try:
+            config = _read_yaml_file(path)
+            scenarios.append(validate_scenario(config))
+        except (yaml.YAMLError, ScenarioValidationError) as exc:
+            issues.append(
+                {
+                    "file_name": path.name,
+                    "message": str(exc),
+                }
+            )
+    return scenarios, issues
+
+
 def list_scenarios() -> list[dict]:
     # 首页每次读取最新 YAML，便于复试现场快速改题。
-    scenarios = []
-    for path in _scenario_files():
-        with path.open("r", encoding="utf-8") as file:
-            config = yaml.safe_load(file) or {}
-        scenarios.append(validate_scenario(config))
+    scenarios, _issues = _collect_scenario_load_result()
     return scenarios
 
 
+def list_scenario_issues() -> list[dict]:
+    """返回配置异常摘要，便于页面明确提示而不是直接 500。"""
+    _scenarios, issues = _collect_scenario_load_result()
+    return issues
+
+
 def get_scenario(scenario_id: str) -> dict:
     for scenario in list_scenarios():
         if scenario["id"] == scenario_id:

apps/scenarios/views.py

@@ -1,8 +1,15 @@
 from django.shortcuts import render
 
-from .services import list_scenarios
+from .services import list_scenario_issues, list_scenarios
 
 
 def index(request):
     # 首页只消费服务层给出的场景摘要，不自行拼装配置字段。
-    return render(request, "scenarios/index.html", {"scenarios": list_scenarios()})
+    return render(
+        request,
+        "scenarios/index.html",
+        {
+            "scenarios": list_scenarios(),
+            "scenario_issues": list_scenario_issues(),
+        },
+    )

templates/scenarios/index.html

@@ -9,6 +9,21 @@
     <p class="page-lead">当前首页直接读取 YAML 场景配置。你可以从这里进入对话、上传资料，再用审计日志验证整条执行链路。</p>
   </header>
 
+  {% if scenario_issues %}
+    <section class="panel" style="margin-bottom: 20px;">
+      <h2 class="section-title">配置异常</h2>
+      <p class="muted">以下 YAML 场景文件存在问题，系统已自动跳过，不会影响其它合法场景展示。</p>
+      <ul class="detail-list">
+        {% for issue in scenario_issues %}
+          <li class="detail-item">
+            <strong>{{ issue.file_name }}</strong>
+            <div>{{ issue.message }}</div>
+          </li>
+        {% endfor %}
+      </ul>
+    </section>
+  {% endif %}
+
   <section class="card-grid">
     {% for scenario in scenarios %}
       <article class="card">

tests/test_scenarios.py

@@ -3,6 +3,7 @@ import pytest
 from apps.scenarios.services import (
     ScenarioNotFound,
     get_scenario,
+    list_scenario_issues,
     list_scenarios,
 )
 
@@ -38,3 +39,91 @@ def test_home_page_shows_applicable_questions(client):
     assert response.status_code == 200
     assert "适用题型" in content
     assert "SOP 问答" in content
+
+
+def test_list_scenarios_skips_invalid_config_and_collects_issues(settings, tmp_path):
+    valid_file = tmp_path / "valid.yaml"
+    invalid_file = tmp_path / "invalid.yaml"
+    valid_file.write_text(
+        """
+id: demo_valid
+name: 有效场景
+description: 用于测试
+agent:
+  role: 测试助手
+  goal: 正常返回
+  instructions:
+    - 输出结果
+rag:
+  enabled: false
+tools: []
+output:
+  type: general_answer
+audit:
+  enabled: true
+""".strip(),
+        encoding="utf-8",
+    )
+    invalid_file.write_text(
+        """
+id: broken
+name: 非法场景
+description: 缺少 agent.goal
+agent:
+  role: 测试助手
+  instructions:
+    - 输出结果
+rag:
+  enabled: true
+tools: []
+output:
+  type: general_answer
+audit:
+  enabled: true
+""".strip(),
+        encoding="utf-8",
+    )
+    settings.SCENARIO_CONFIG_DIR = tmp_path
+
+    scenarios = list_scenarios()
+    issues = list_scenario_issues()
+
+    assert [scenario["id"] for scenario in scenarios] == ["demo_valid"]
+    assert len(issues) == 1
+    assert issues[0]["file_name"] == "invalid.yaml"
+    assert "agent.goal" in issues[0]["message"]
+
+
+def test_home_page_shows_invalid_scenario_issues_instead_of_500(client, settings, tmp_path):
+    valid_file = tmp_path / "valid.yaml"
+    invalid_file = tmp_path / "invalid.yaml"
+    valid_file.write_text(
+        """
+id: demo_valid
+name: 有效场景
+description: 用于测试
+agent:
+  role: 测试助手
+  goal: 正常返回
+  instructions:
+    - 输出结果
+rag:
+  enabled: false
+tools: []
+output:
+  type: general_answer
+audit:
+  enabled: true
+""".strip(),
+        encoding="utf-8",
+    )
+    invalid_file.write_text("id: broken\nname: 缺失结构", encoding="utf-8")
+    settings.SCENARIO_CONFIG_DIR = tmp_path
+
+    response = client.get("/")
+
+    content = response.content.decode("utf-8")
+    assert response.status_code == 200
+    assert "有效场景" in content
+    assert "配置异常" in content
+    assert "invalid.yaml" in content