refactor: task_tree 阶段顺序改为从 SDL_ROLES 动态生成（next_role 链推导，自动排除 qc 门禁），不再写死 _phase_order

wwwroot/api/task_tree.dspy

@@ -25,14 +25,32 @@ _state_zh = {
     'failed': '失败', 'waiting': '等待中', 'submitted': '已提交',
     'review': '审核中', 'rejected': '已驳回', 'paused': '已暂停', 'cancelled': '已取消',
 }
-# 阶段顺序（role 规范名 → 中文名）
-_phase_order = [
-    ('agent.requirement', '需求阶段'),
-    ('agent.design', '设计阶段'),
-    ('agent.develop', '开发阶段'),
-    ('agent.test', '测试阶段'),
-    ('agent.deploy', '部署阶段'),
-]
+# 阶段顺序：从产线角色集（SDL_ROLES）动态生成，用 next_role 链推导线性角色（自动排除 qc 门禁）。
+def _get_phase_order():
+    try:
+        from pipeline_core import list_roles
+        roles = list_roles("sdlc_general") or []
+        role_map = {r.name: r for r in roles}
+        next_set = {getattr(r, 'next_role', '') for r in roles if getattr(r, 'next_role', '')}
+        heads = [r for r in roles if r.name not in next_set and getattr(r, 'next_role', '')]
+        order = []
+        seen = set()
+        cur = heads[0] if heads else None
+        while cur and cur.name not in seen:
+            seen.add(cur.name)
+            desc = getattr(cur, 'description', '') or cur.name
+            order.append((cur.name, desc))
+            cur = role_map.get(getattr(cur, 'next_role', ''))
+        return order
+    except Exception:
+        return [
+            ('agent.requirement', '需求阶段'),
+            ('agent.design', '设计阶段'),
+            ('agent.develop', '开发阶段'),
+            ('agent.deploy_test', '测试环境部署'),
+            ('agent.test', '测试阶段'),
+            ('agent.deploy_prod', '生产环境部署'),
+        ]
 
 
 def _iter_of(task):
@@ -128,7 +146,7 @@ async with DBPools().sqlorContext(dbname) as sor:
                 r = (getattr(t, 'role', '') or '').strip()
                 role_cnt[r] = role_cnt.get(r, 0) + 1
             nodes = []
-            for rn, rzh in _phase_order:
+            for rn, rzh in _get_phase_order():
                 if rn in role_cnt:
                     nodes.append({
                         "id": "iter:{}:phase:{}".format(iter_id, rn),