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/models/__init__.py

@@ -166,12 +166,30 @@ class RolePermission(Base):
     updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
 
 
+class Objective(Base):
+    """OKR目标"""
+    __tablename__ = "objectives"
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(200), nullable=False, comment="目标标题")
+    description = Column(Text, nullable=True, comment="目标描述")
+    dimension = Column(String(50), nullable=True, comment="关联维度: finance/customer/process/learning")
+    strategic_map_id = Column(Integer, ForeignKey("strategic_maps.id"), nullable=True, comment="关联战略地图")
+    quarter = Column(String(20), nullable=False, comment="季度: 2026Q3")
+    owner = Column(String(100), nullable=True, comment="负责人")
+    status = Column(String(20), default="active", comment="active/completed/cancelled")
+    progress = Column(Integer, default=0, comment="整体进度 0-100")
+    confidence = Column(Integer, default=5, comment="信心指数 1-10")
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
 class ActionPlan(Base):
     """改善行动计划"""
     __tablename__ = "action_plans"
     id = Column(Integer, primary_key=True, index=True)
     alert_id = Column(Integer, ForeignKey("kpi_alerts.id"), nullable=True, comment="关联预警")
     kpi_id = Column(Integer, ForeignKey("kpi_definitions.id"), nullable=False, comment="关联KPI")
+    objective_id = Column(Integer, ForeignKey("objectives.id"), nullable=True, comment="关联OKR目标")
     title = Column(String(200), nullable=False, comment="计划标题")
     description = Column(Text, nullable=True, comment="详细描述")
     assignee = Column(String(100), nullable=True, comment="负责人")
@@ -326,3 +344,21 @@ class KPITemplate(Base):
     created_by = Column(Integer)
     created_at = Column(DateTime, server_default=func.now())
     updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())
+
+
+class OKRTemplate(Base):
+    """OKR模板库"""
+    __tablename__ = "okr_templates"
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(100), nullable=False, comment="O名称")
+    description = Column(Text, comment="O描述")
+    dimension = Column(String(20), nullable=False, comment="finance/customer/process/learning")
+    layer = Column(String(20), default="level1", comment="level1/level2/level3")
+    industry_tag = Column(String(50), default="general", comment="行业标签")
+    preset_krs = Column(JSON, nullable=False, comment="预设关键结果列表")
+    source = Column(String(20), default="system", comment="system/user/industry_pack")
+    use_count = Column(Integer, default=0, comment="使用次数")
+    sort_order = Column(Integer, default=0)
+    is_active = Column(Integer, default=1)
+    created_at = Column(DateTime, server_default=func.now())
+    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())