Phase 1: OKR模板 — 两步弹窗(O+KR结构) + 14个CMA模板 + okr_templates表 + API

MapCanvasDialogs.vue:
- 节点编辑弹窗改为两步交互（模板选择→O+KR编辑）
- 第一步：按维度展示对应模板（财务4/客户3/流程4/学习3）
- 第二步：编辑O名称+描述+3个KR(名称/目标值/权重)
- 14个CMA标准模板硬编码在前端
- 支持添加/删除KR、自定义目标跳过模板

MapCanvas.vue:
- 传递 editingLayerKey 到弹窗
- onSaveDialog 适配新 O+KR 数据结构
- onNodeSave 存储 krs 和 template_name 字段

Backend:
- OKRTemplate 模型 (okr_templates 表)
- okr_templates API: GET(按维度筛选) + POST(用户自定义) + increment use_count
- seed_okr_templates.py 迁移脚本（建表+14条种子数据）
- 在 main.py 注册新路由

backend/app/api/okr_templates.py

@@ -0,0 +1,115 @@
+"""
+OKR模板库 API — 按维度筛选 + 用户自定义模板
+"""
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+from typing import Optional
+from app.database import get_db
+from app.auth_middleware import require_role
+from app.models import OKRTemplate
+
+router = APIRouter(prefix="/api/cma/okr-templates", tags=["OKR模板库"],
+    dependencies=[Depends(require_role("ceo", "finance", "it"))],
+)
+
+
+@router.get("")
+def list_okr_templates(
+    dimension: Optional[str] = Query(None, description="按维度筛选: finance/customer/process/learning"),
+    source: Optional[str] = Query(None, description="按来源筛选: system/user/industry_pack"),
+    industry_tag: Optional[str] = Query(None, description="按行业标签筛选"),
+    active_only: bool = Query(True, description="仅返回启用模板"),
+    db: Session = Depends(get_db),
+):
+    """列出 OKR 模板，支持按维度筛选"""
+    q = db.query(OKRTemplate)
+    if dimension:
+        q = q.filter(OKRTemplate.dimension == dimension)
+    if source:
+        q = q.filter(OKRTemplate.source == source)
+    if industry_tag:
+        q = q.filter(OKRTemplate.industry_tag == industry_tag)
+    if active_only:
+        q = q.filter(OKRTemplate.is_active == 1)
+    templates = q.order_by(OKRTemplate.sort_order, OKRTemplate.id).all()
+    return {
+        "total": len(templates),
+        "items": [
+            {
+                "id": t.id,
+                "name": t.name,
+                "description": t.description,
+                "dimension": t.dimension,
+                "layer": t.layer,
+                "industry_tag": t.industry_tag,
+                "preset_krs": t.preset_krs,
+                "source": t.source,
+                "use_count": t.use_count,
+                "sort_order": t.sort_order,
+                "is_active": t.is_active,
+                "created_at": t.created_at.isoformat() if t.created_at else None,
+            }
+            for t in templates
+        ],
+    }
+
+
+@router.get("/{template_id}")
+def get_okr_template(template_id: int, db: Session = Depends(get_db)):
+    """获取单个 OKR 模板详情"""
+    t = db.query(OKRTemplate).filter(OKRTemplate.id == template_id).first()
+    if not t:
+        raise HTTPException(404, "模板不存在")
+    return {
+        "id": t.id,
+        "name": t.name,
+        "description": t.description,
+        "dimension": t.dimension,
+        "layer": t.layer,
+        "industry_tag": t.industry_tag,
+        "preset_krs": t.preset_krs,
+        "source": t.source,
+        "use_count": t.use_count,
+        "sort_order": t.sort_order,
+        "is_active": t.is_active,
+    }
+
+
+@router.post("")
+def create_okr_template(data: dict, db: Session = Depends(get_db)):
+    """用户自定义 OKR 模板"""
+    name = data.get("name", "").strip()
+    if not name:
+        raise HTTPException(400, "模板名称不能为空")
+    dimension = data.get("dimension", "")
+    if dimension not in ("finance", "customer", "process", "learning"):
+        raise HTTPException(400, "维度无效，必须是 finance/customer/process/learning")
+    preset_krs = data.get("preset_krs", [])
+    if not isinstance(preset_krs, list) or len(preset_krs) == 0:
+        raise HTTPException(400, "至少需要一个预设KR")
+
+    t = OKRTemplate(
+        name=name,
+        description=data.get("description", ""),
+        dimension=dimension,
+        layer=data.get("layer", "level3"),
+        industry_tag=data.get("industry_tag", "general"),
+        preset_krs=preset_krs,
+        source="user",
+        sort_order=data.get("sort_order", 0),
+    )
+    db.add(t)
+    db.commit()
+    db.refresh(t)
+    return {"ok": True, "id": t.id, "name": t.name}
+
+
+@router.post("/{template_id}/use")
+def increment_use_count(template_id: int, db: Session = Depends(get_db)):
+    """增加模板使用次数"""
+    t = db.query(OKRTemplate).filter(OKRTemplate.id == template_id).first()
+    if not t:
+        raise HTTPException(404, "模板不存在")
+    t.use_count = (t.use_count or 0) + 1
+    db.commit()
+    return {"ok": True, "use_count": t.use_count}