feat: init rssKeeper - RSS 抓取、管理与检索系统

完整功能包括:
- FastAPI 后端 + SQLite + FTS5 全文搜索
- RSS 源管理、自动发现、OPML 导入导出
- 文章抓取、去重、分类、全文检索
- RSS 源健康度监控
- Vue 3 + Element Plus 暗色主题 Web UI
- 对外 REST API 供 AI 分析调用
- Docker + docker-compose 部署

backend/routers/dashboard.py

@@ -0,0 +1,58 @@
+"""仪表盘统计 API"""
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from database import get_db
+from health_checker import get_overall_stats, get_feed_health
+
+router = APIRouter(prefix="/dashboard", tags=["dashboard"])
+
+
+@router.get("/stats")
+def dashboard_stats(db: Session = Depends(get_db)):
+    """仪表盘统计数据"""
+    return get_overall_stats(db)
+
+
+@router.get("/health")
+def dashboard_health(
+    skip: int = 0,
+    limit: int = 100,
+    db: Session = Depends(get_db),
+):
+    """RSS 源健康度列表"""
+    all_health = get_feed_health(db)
+    total = len(all_health)
+
+    # 按健康状态排序：异常在前
+    status_order = {"unhealthy": 0, "warning": 1, "unknown": 2, "healthy": 3}
+    all_health.sort(key=lambda x: status_order.get(x["health_status"], 2))
+
+    items = all_health[skip:skip + limit]
+    return {"total": total, "items": items}
+
+
+@router.get("/recent-activity")
+def recent_activity(limit: int = 20, db: Session = Depends(get_db)):
+    """最近的抓取活动"""
+    from models import FetchLog, Feed
+    from sqlalchemy import desc
+
+    logs = db.query(FetchLog, Feed.title.label("feed_title")).join(Feed).order_by(
+        desc(FetchLog.created_at)
+    ).limit(limit).all()
+
+    return {
+        "items": [
+            {
+                "id": log.id,
+                "feed_id": log.feed_id,
+                "feed_title": feed_title or "",
+                "status": log.status,
+                "articles_fetched": log.articles_fetched,
+                "response_time_ms": log.response_time_ms,
+                "error_message": log.error_message,
+                "created_at": log.created_at.isoformat(),
+            }
+            for log, feed_title in logs
+        ]
+    }