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/main.py

@@ -5,7 +5,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse
 from dotenv import load_dotenv
 from app.database import init_db
-from app.api import auth, kpis, templates, maps, dashboard, data, alerts, ai_analysis, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, customer_dashboard, deviation_push, budget_generate, knowledge_articles, kpi_causality, data_quality, bi_reports, entities, bsc_layers
+from app.api import auth, kpis, templates, maps, dashboard, data, alerts, ai_analysis, alert_rules, users, thresholds, notifications, permissions, action_plans, alignment, org, objectives, versions, budget, cost, predict, reports, security, knowledge, bot_bridge, customer_dashboard, deviation_push, budget_generate, knowledge_articles, kpi_causality, data_quality, bi_reports, entities, bsc_layers, okr, okr_templates
 from app.utils.cache import clear_all as clear_cache, delete as delete_cache
 from scripts.erp_sync import run_sync as run_erp_sync
 from app.auth_middleware import require_auth
@@ -64,6 +64,8 @@ app.include_router(data_quality.router)
 app.include_router(bi_reports.router)
 app.include_router(entities.router)
 app.include_router(bsc_layers.router)
+app.include_router(okr.router)
+app.include_router(okr_templates.router)
 
 @app.exception_handler(Exception)
 async def global_exception_handler(request: Request, exc: Exception):