feat: OKR模板库改造 — 弹窗模板库联动+时间分解落库+制造业包6个

backend/app/api/action_plans.py

@@ -155,9 +155,39 @@ def create_plan(
     db.add(plan)
     db.commit()
     db.refresh(plan)
+
+    # OKR时间分解：KR创建时自动生成3个月度里程碑（按截止日期向前均分）
+    if due_date and not plan.monthly_milestones:
+        try:
+            plan.monthly_milestones = _auto_build_milestones(due_date)
+            db.commit()
+        except Exception:
+            db.rollback()  # 里程碑生成失败不影响KR创建
+            db.refresh(plan)
     return plan_to_dict(plan)
 
 
+def _auto_build_milestones(due_date: datetime) -> list:
+    """按截止日期向前均分3个月度里程碑"""
+    base = due_date.replace(day=1)
+    month_keys = []
+    for i in range(3, 0, -1):
+        y, m = base.year, base.month - i
+        while m <= 0:
+            m += 12
+            y -= 1
+        month_keys.append(f"{y:04d}-{m:02d}")
+    return [
+        {
+            "month": mk,
+            "label": f"里程碑{i + 1}",
+            "status": "pending",
+            "target": None,
+        }
+        for i, mk in enumerate(month_keys)
+    ]
+
+
 @router.put("/{plan_id}")
 def update_plan(
     plan_id: int,