diff --git a/frontend/app/api/m/route.ts b/frontend/app/api/m/route.ts
index 41f78fc5..6e7eb4eb 100644
--- a/frontend/app/api/m/route.ts
+++ b/frontend/app/api/m/route.ts
@@ -8,9 +8,13 @@ export async function GET(req: NextRequest) {
     return new NextResponse("API not configured", { status: 500 });
   }
   const isCards = req.nextUrl.searchParams.get("cards") === "1";
-  const path = isCards ? "/m/cards" : "/m";
+  const asJson = req.nextUrl.searchParams.get("json") === "1";
+  const path = asJson ? "/m/json" : isCards ? "/m/cards" : "/m";
   const auth = await buildBackendRequestHeaders(req, { includeSupabaseIdentity: false });
   const res = await fetch(`${API_BASE}${path}`, { headers: auth.headers });
+  if (asJson) {
+    return NextResponse.json(await res.json());
+  }
   const html = await res.text();
   return new NextResponse(html, {
     status: res.status,
diff --git a/frontend/components/dashboard/ScanTerminalDashboard.tsx b/frontend/components/dashboard/ScanTerminalDashboard.tsx
index db106fe6..3c759ffa 100644
--- a/frontend/components/dashboard/ScanTerminalDashboard.tsx
+++ b/frontend/components/dashboard/ScanTerminalDashboard.tsx
@@ -46,6 +46,7 @@ import {
   useScanTerminalTheme,
   useUserLocalClock,
 } from "@/components/dashboard/scan-terminal/use-scan-terminal-ui-state";
+import MonitorPanel from "@/components/dashboard/monitoring/MonitorPanel";
 
 type ContentView = "analysis" | "map" | "monitor";
 
@@ -597,13 +598,9 @@ function ScanTerminalScreen() {
             ) : (
               renderMainView()
             )}
-            <div style={{ display: resolvedView === "monitor" ? "block" : "none", background: "#0f1117", flex: 1, minHeight: 0 }}>
-              <iframe
-                src="/api/m"
-                style={{ width: "100%", height: "100%", border: "none" }}
-                title="市场监控"
-              />
-            </div>
+            {resolvedView === "monitor" && (
+              <MonitorPanel />
+            )}
           </section>
         </main>
 
diff --git a/frontend/components/dashboard/monitoring/MonitorPanel.tsx b/frontend/components/dashboard/monitoring/MonitorPanel.tsx
new file mode 100644
index 00000000..b0182ba3
--- /dev/null
+++ b/frontend/components/dashboard/monitoring/MonitorPanel.tsx
@@ -0,0 +1,188 @@
+"use client";
+
+import { useEffect, useState, useCallback } from "react";
+
+interface RunwayPair {
+  label: string;
+  temp: number;
+}
+
+interface CitySnapshot {
+  en_name: string;
+  airport: string;
+  obs_time: string;
+  current_temp: number | null;
+  max_so_far: number | null;
+  max_temp_time: string | null;
+  trend_sym: string;
+  trend_css: string;
+  obs_age_min: number | null;
+  new_high: boolean;
+  temp_warm: boolean;
+  runway_pairs?: string; // HTML from backend
+}
+
+function parseRunway(html: string): RunwayPair[] {
+  const pairs: RunwayPair[] = [];
+  const re = /runway-label">([^<]+)<.*?runway-temp">([\d.]+)/g;
+  let m;
+  while ((m = re.exec(html)) !== null) {
+    pairs.push({ label: m[1], temp: parseFloat(m[2]) });
+  }
+  return pairs;
+}
+
+export default function MonitorPanel() {
+  const [cities, setCities] = useState<CitySnapshot[]>([]);
+  const [time, setTime] = useState("");
+  const [notify, setNotify] = useState(
+    () => typeof window !== "undefined" && localStorage.getItem("monitor_notify") !== "off"
+  );
+
+  const fetchData = useCallback(async () => {
+    try {
+      const res = await fetch("/api/m?json=1");
+      const data = await res.json();
+      setCities(data);
+      setTime(new Date().toLocaleTimeString());
+    } catch {}
+  }, []);
+
+  useEffect(() => {
+    fetchData();
+    const t = setInterval(fetchData, 30_000);
+    return () => clearInterval(t);
+  }, [fetchData]);
+
+  const toggleNotify = () => {
+    const next = !notify;
+    setNotify(next);
+    localStorage.setItem("monitor_notify", next ? "on" : "off");
+    if (next && "Notification" in window && Notification.permission === "default") {
+      Notification.requestPermission();
+    }
+  };
+
+  return (
+    <div style={{ background: "#0f1117", height: "100%", overflow: "auto", padding: "20px 24px" }}>
+      {/* Header */}
+      <div style={{
+        display: "flex", justifyContent: "space-between", alignItems: "baseline",
+        marginBottom: 24, paddingBottom: 12, borderBottom: "1px solid #1e2130",
+      }}>
+        <h2 style={{ fontSize: 20, fontWeight: 600, color: "#e8eaed" }}>🔥 市场监控</h2>
+        <div style={{ display: "flex", alignItems: "center", gap: 12 }}>
+          <button
+            onClick={toggleNotify}
+            style={{
+              background: "none", border: "1px solid #2a2e40", borderRadius: 6,
+              padding: "2px 8px", fontSize: 16, cursor: "pointer", opacity: notify ? 1 : 0.4,
+            }}
+            title="新高提醒开关"
+          >
+            {notify ? "🔔" : "🔕"}
+          </button>
+          <span style={{ fontSize: 13, color: "#5a6170" }}>{time}</span>
+        </div>
+      </div>
+
+      {/* Card Grid */}
+      <div style={{
+        display: "grid", gridTemplateColumns: "repeat(auto-fill, minmax(340px, 1fr))",
+        gap: 14,
+      }}>
+        {cities.map((c) => {
+          const cn = c.new_high ? " new-high-card" : "";
+          const wc = c.temp_warm ? " warm" : "";
+          const nv = c.new_high ? " new-high-val" : "";
+          const rw = c.runway_pairs ? parseRunway(c.runway_pairs) : [];
+
+          return (
+            <div key={c.en_name} className={`card${cn}`} style={cardStyle}>
+              {/* Top */}
+              <div style={cardTopStyle}>
+                <span style={{ color: "#e0e3e8", fontWeight: 700 }}>{c.en_name}</span>
+                <span style={{ color: "#6a7180" }}>/ {c.airport}</span>
+                <span style={{ marginLeft: "auto", color: "#4a5160", fontSize: 14 }}>{c.obs_time}</span>
+                {c.new_high && (
+                  <span style={{ fontSize: 12, padding: "1px 6px", borderRadius: 4,
+                    background: "rgba(124,58,237,.18)", color: "#a78bfa", fontWeight: 600 }}>
+                    ◆新高
+                  </span>
+                )}
+              </div>
+
+              {/* Temp */}
+              <div style={{ margin: "8px 0 10px", lineHeight: 1.15 }}>
+                {c.current_temp != null ? (
+                  <>
+                    <span style={{ fontSize: 48, fontWeight: 700, letterSpacing: "-.03em",
+                      color: c.new_high ? "#c084fc" : c.temp_warm ? "#f59e0b" : "#e8eaed" }}>
+                      {c.current_temp.toFixed(1)}
+                    </span>
+                    <span style={{ fontSize: 20, color: "#5a6170", marginLeft: 3 }}>°C</span>
+                  </>
+                ) : (
+                  <span style={{ fontSize: 30, color: "#3a4050" }}>--</span>
+                )}
+              </div>
+
+              {/* Meta */}
+              <div style={{ fontSize: 14 }}>
+                <div style={{ display: "flex", alignItems: "baseline", gap: 8 }}>
+                  <span style={{ color: "#4a5160" }}>High</span>
+                  {c.max_so_far != null ? (
+                    <>
+                      <span style={{ color: "#9aa0b0" }}>{c.max_so_far.toFixed(1)}°C</span>
+                      {c.max_temp_time && (
+                        <span style={{ fontSize: 12, color: "#4a5160", marginLeft: 2 }}>{c.max_temp_time}</span>
+                      )}
+                    </>
+                  ) : (
+                    <span style={{ color: "#3a4050" }}>--</span>
+                  )}
+                  <span style={{ marginLeft: "auto", fontSize: 18, fontWeight: 700,
+                    color: c.trend_css === "rising" ? "#34d399" :
+                           c.trend_css === "falling" ? "#60a5fa" : "#5a6170" }}>
+                    {c.trend_sym}
+                  </span>
+                </div>
+                <div style={{ display: "flex", gap: 8, marginTop: 4 }}>
+                  <span style={{ color: "#4a5160" }}>Obs</span>
+                  {c.obs_age_min != null ? (
+                    <span style={{ color: "#5a6170", fontSize: 13 }}>{c.obs_age_min} min ago</span>
+                  ) : (
+                    <span style={{ color: "#3a4050" }}>--</span>
+                  )}
+                </div>
+              </div>
+
+              {/* Runway */}
+              {rw.length > 0 && (
+                <div style={{ marginTop: 12 }}>
+                  <div style={{ height: 1, background: "#1e2130", marginBottom: 8 }} />
+                  {rw.map((r, i) => (
+                    <div key={i} style={{ display: "flex", justifyContent: "space-between", fontSize: 13, marginBottom: 2 }}>
+                      <span style={{ color: "#4a5160" }}>{r.label}</span>
+                      <span style={{ color: "#7a8290" }}>{r.temp.toFixed(1)}°C</span>
+                    </div>
+                  ))}
+                </div>
+              )}
+            </div>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
+const cardStyle: React.CSSProperties = {
+  background: "#161822", border: "1px solid #1e2130", borderRadius: 12,
+  padding: "20px 24px", position: "relative",
+};
+
+const cardTopStyle: React.CSSProperties = {
+  display: "flex", alignItems: "center", gap: 8,
+  marginBottom: 14, fontSize: 15, flexWrap: "wrap",
+};
diff --git a/web/monitor_routes.py b/web/monitor_routes.py
index e2513e23..27dc6946 100644
--- a/web/monitor_routes.py
+++ b/web/monitor_routes.py
@@ -254,3 +254,15 @@ async def monitor_page(request: Request):
 async def monitor_cards(request: Request):
     cards, gts = _build_cards()
     return HTMLResponse(_render(cards, gts))
+
+@router.get("/m/json")
+async def monitor_json(request: Request):
+    cards, gts = _build_cards()
+    return [{
+        "en_name": c["en_name"], "airport": c["airport"],
+        "obs_time": c["time"], "current_temp": c["ct"],
+        "max_so_far": c["msf"], "max_temp_time": c["mtt"],
+        "trend_sym": c["tsym"], "trend_css": c["tcss"],
+        "obs_age_min": c["age"], "new_high": c["new_high"],
+        "temp_warm": c["warm"], "runway_pairs": c["rw_html"],
+    } for c in cards]