feat: GeoScene frontend POC + Docker deploy for remote host

Migrate maps to @geoscene/core, polish monitoring/alerts UX, fix timeline
basemap flicker and district alert regions, and ship compose/nginx Docker
deploy assets with CBPOA_ROOT data mounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

CLAUDE.md

@@ -1,12 +1,12 @@
 # CBPOA — 武汉儿童呼吸疾病风险评估系统
 
-FastAPI + React + PyTorch GCN pipeline. 预测空气质量对儿童健康的空间风险。
+FastAPI + React + `@geoscene/core` + PyTorch GCN pipeline. 预测空气质量对儿童健康的空间风险。
 
 ## Development
 
 ```bash
 # Frontend (pnpm)
-cd frontend && pnpm dev          # localhost:5173 → proxies /api to :8000
+cd frontend && pnpm dev          # localhost:3000 → proxies /api to :8000
 
 # Backend (Python venv)
 cd backend && uvicorn main:app --reload   # localhost:8000
@@ -22,6 +22,7 @@ cd scripts && python train_model.py       # PyTorch + MLflow
 | API endpoint | `backend/routers/` |
 | Database / PostGIS | `backend/database.py` |
 | UI component | `frontend/src/components/` |
+| GeoScene map helpers | `frontend/src/geoscene/` |
 | Page view | `frontend/src/pages/` |
 | API client / cache | `frontend/src/services/api.ts` |
 | State management | `frontend/src/stores/` |