init: 管理会计OS初始代码

包含前后端完整代码：
- 前端：Vue3+Vite+ElementPlus
- 后端：FastAPI+SQLAlchemy
- 模块：驾驶舱/KPI/战略地图/预警/预算/成本/预测/改善行动
- 当前版本：v1.0.0

backend/app/api/versions.py

@@ -0,0 +1,86 @@
+"""战略地图版本管理 API"""
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from app.database import get_db
+from app.auth_middleware import require_role
+from app.models import StrategicMap, StrategicMapVersion
+
+router = APIRouter(prefix="/api/cma/maps", tags=["战略地图版本"],
+    dependencies=[Depends(require_role("ceo", "finance"))],
+)
+
+
+@router.get("/{map_id}/versions")
+def list_versions(map_id: int, db: Session = Depends(get_db)):
+    """查看版本历史"""
+    versions = db.query(StrategicMapVersion).filter(
+        StrategicMapVersion.map_id == map_id
+    ).order_by(StrategicMapVersion.id.desc()).all()
+    return {"data": [v_to_dict(v) for v in versions]}
+
+
+@router.post("/{map_id}/versions/snapshot")
+def create_snapshot(map_id: int, data: dict, db: Session = Depends(get_db)):
+    """手动创建快照"""
+    m = db.query(StrategicMap).filter(StrategicMap.id == map_id).first()
+    if not m:
+        raise HTTPException(404, "战略地图不存在")
+
+    import json
+    dims = m.dimensions
+    canvas = m.canvas_data
+    if isinstance(dims, str):
+        dims = json.loads(dims)
+    if isinstance(canvas, str):
+        canvas = json.loads(canvas)
+
+    # 自动版本号
+    existing = db.query(StrategicMapVersion).filter(
+        StrategicMapVersion.map_id == map_id
+    ).order_by(StrategicMapVersion.id.desc()).first()
+    if existing:
+        import re
+        match = re.search(r"v(\d+)\.(\d+)", existing.version)
+        major = int(match.group(1)) if match else 1
+        minor = int(match.group(2)) + 1 if match else 0
+        new_ver = f"v{major}.{minor}"
+    else:
+        new_ver = "v1.0"
+
+    snapshot = StrategicMapVersion(
+        map_id=map_id,
+        version=new_ver,
+        dimensions=dims,
+        canvas_data=canvas,
+        comment=data.get("comment", f"手动快照 {new_ver}"),
+    )
+    db.add(snapshot)
+    db.commit()
+    db.refresh(snapshot)
+    return v_to_dict(snapshot)
+
+
+@router.post("/{map_id}/versions/{ver_id}/rollback")
+def rollback_version(map_id: int, ver_id: int, db: Session = Depends(get_db)):
+    """回滚到指定版本"""
+    m = db.query(StrategicMap).filter(StrategicMap.id == map_id).first()
+    if not m:
+        raise HTTPException(404, "战略地图不存在")
+
+    v = db.query(StrategicMapVersion).filter(
+        StrategicMapVersion.id == ver_id,
+        StrategicMapVersion.map_id == map_id,
+    ).first()
+    if not v:
+        raise HTTPException(404, "版本不存在")
+
+    m.dimensions = v.dimensions
+    m.canvas_data = v.canvas_data
+    m.version = f"rollback-{v.version}"
+    m.status = "draft"
+    db.commit()
+    return {"message": f"已回滚到 {v.version}", "version": m.version}
+
+
+def v_to_dict(v):
+    return {c.name: getattr(v, c.name) for c in v.__table__.columns}