数据统计页：多机 KPI 对比与余额曲线采样。

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

app.py

@@ -35,6 +35,7 @@ from lib.bridge_client_lib import (
     post_cond_exit,
     pull_all_enabled,
 )
+from lib.cash_sample_lib import record_cash_samples_from_overview
 from lib.db_lib import init_db
 from lib.env_lib import apply_env_updates, env_get
 from lib.health_watch_lib import inspect_overview_rows
@@ -46,6 +47,7 @@ from lib.instances_lib import (
     update_instance,
 )
 from lib.sso_lib import build_embed_open_url
+from lib.stats_agg_lib import build_stats_curve, build_stats_summary, normalize_window
 from lib.wechat_lib import (
     hub_alert_cooldown_sec,
     hub_health_fail_threshold,
@@ -130,6 +132,32 @@ def dashboard():
     return render_template("dashboard.html")
 
 
+@app.route("/stats")
+@login_required
+def stats_page():
+    return render_template("stats.html")
+
+
+@app.route("/api/stats/summary")
+@login_required
+def api_stats_summary():
+    window = normalize_window(request.args.get("window") or "7d")
+    try:
+        return jsonify(build_stats_summary(window))
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e) or "统计失败"}), 500
+
+
+@app.route("/api/stats/curve")
+@login_required
+def api_stats_curve():
+    range_key = normalize_window(request.args.get("range") or request.args.get("window") or "7d")
+    try:
+        return jsonify(build_stats_curve(range_key))
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e) or "曲线失败"}), 500
+
+
 @app.route("/instances", methods=["GET", "POST"])
 @login_required
 def instances_page():
@@ -323,11 +351,12 @@ def _health_pull_interval_sec() -> float:
 
 
 def _health_watch_loop() -> None:
-    """后台巡检:即使无人打开总览也会告警."""
+    """后台巡检:即使无人打开总览也会告警;并采样余额曲线."""
     while True:
         try:
             rows = pull_all_enabled()
             inspect_overview_rows(rows)
+            record_cash_samples_from_overview(rows)
         except Exception:
             pass
         time.sleep(_health_pull_interval_sec())