feat: add historical accuracy chart and modal to web UI

web/app.py

@@ -464,6 +464,38 @@ async def city_detail(name: str):
     return _analyze(name)
 
 
+@app.get("/api/history/{name}")
+async def city_history(name: str):
+    """Return historical accuracy data (DEB, mu, actuals) for a city."""
+    name = name.lower().strip().replace("-", " ")
+    name = ALIASES.get(name, name)
+    
+    from src.analysis.deb_algorithm import load_history
+    import os
+    
+    project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    history_file = os.path.join(project_root, "data", "daily_records.json")
+    data = load_history(history_file)
+    
+    if name not in data:
+        return {"history": []}
+        
+    city_data = data[name]
+    out = []
+    for d, rec in sorted(city_data.items()):
+        act = rec.get("actual_high")
+        deb = rec.get("deb_prediction")
+        mu = rec.get("mu")
+        
+        # Only return items where we have at least an actual or a prediction
+        out.append({
+            "date": d,
+            "actual": float(act) if act is not None else None,
+            "deb": float(deb) if deb is not None else None,
+            "mu": float(mu) if mu is not None else None,
+        })
+    return {"history": out}
+
 # ──────────────────────────────────────────────────────────
 #  Entrypoint
 # ──────────────────────────────────────────────────────────

web/static/app.js

@@ -820,6 +820,164 @@ async function loadAllCitiesProgressively(cities) {
   }
 }
 
+// ──────────────────────────────────────────────────────────
+//  History Chart Logic
+// ──────────────────────────────────────────────────────────
+let historyChartInst = null;
+
+async function openHistoryModal() {
+  if (!selectedCity) return;
+
+  const modal = document.getElementById("historyModal");
+  const title = document.getElementById("historyModalTitle");
+  const statsDiv = document.getElementById("historyStats");
+
+  modal.classList.remove("hidden");
+  title.textContent = `历史准确率对账 - ${selectedCity.toUpperCase()}`;
+  statsDiv.innerHTML =
+    '<span style="color:var(--text-muted)">正在获取底层数据库...</span>';
+
+  try {
+    const res = await fetch(`/api/history/${encodeURIComponent(selectedCity)}`);
+    const json = await res.json();
+    const data = json.history || [];
+
+    if (data.length === 0) {
+      statsDiv.innerHTML =
+        '<span style="color:var(--text-muted)">暂无该城市历史数据</span>';
+      if (historyChartInst) historyChartInst.destroy();
+      return;
+    }
+
+    // Compute stats
+    let hits = 0;
+    let debErrors = [];
+    let muErrors = [];
+
+    const dates = [];
+    const actuals = [];
+    const debs = [];
+    const mus = [];
+
+    data.forEach((row) => {
+      dates.push(row.date);
+      actuals.push(row.actual);
+      debs.push(row.deb);
+      mus.push(row.mu);
+
+      if (row.actual != null && row.deb != null) {
+        debErrors.push(Math.abs(row.actual - row.deb));
+        if (Math.round(row.actual) === Math.round(row.deb)) {
+          hits++;
+        }
+      }
+      if (row.actual != null && row.mu != null) {
+        muErrors.push(Math.abs(row.actual - row.mu));
+      }
+    });
+
+    const hitRate = debErrors.length
+      ? ((hits / debErrors.length) * 100).toFixed(0)
+      : 0;
+    const debMae = debErrors.length
+      ? (debErrors.reduce((a, b) => a + b, 0) / debErrors.length).toFixed(1)
+      : "-";
+    const muMae = muErrors.length
+      ? (muErrors.reduce((a, b) => a + b, 0) / muErrors.length).toFixed(1)
+      : "-";
+
+    statsDiv.innerHTML = `
+      <div class="h-stat-card"><span class="label">DEB 结算胜率 (WU)</span><span class="val">${hitRate}%</span></div>
+      <div class="h-stat-card"><span class="label">DEB MAE</span><span class="val">${debMae}°</span></div>
+      <div class="h-stat-card"><span class="label">μ (概率) MAE</span><span class="val">${muMae}°</span></div>
+      <div class="h-stat-card"><span class="label">有效样本数</span><span class="val">${data.length}天</span></div>
+    `;
+
+    if (historyChartInst) historyChartInst.destroy();
+    const ctx = document.getElementById("historyChart").getContext("2d");
+
+    historyChartInst = new Chart(ctx, {
+      type: "line",
+      data: {
+        labels: dates,
+        datasets: [
+          {
+            label: "实测最高温",
+            data: actuals,
+            borderColor: "#f87171", // red
+            backgroundColor: "rgba(248, 113, 113, 0.1)",
+            borderWidth: 2,
+            tension: 0.2,
+            pointRadius: 4,
+            pointBackgroundColor: "#f87171",
+            pointBorderColor: "#fff",
+            zIndex: 10,
+          },
+          {
+            label: "DEB 融合",
+            data: debs,
+            borderColor: "#34d399", // emerald
+            backgroundColor: "transparent",
+            borderWidth: 2,
+            borderDash: [5, 4],
+            tension: 0.2,
+            pointRadius: 3,
+          },
+          {
+            label: "μ (概率锚定)",
+            data: mus,
+            borderColor: "#a78bfa", // purple
+            backgroundColor: "transparent",
+            borderWidth: 2,
+            borderDash: [2, 2],
+            tension: 0.2,
+            pointRadius: 3,
+          },
+        ],
+      },
+      options: {
+        responsive: true,
+        maintainAspectRatio: false,
+        interaction: { mode: "index", intersect: false },
+        plugins: {
+          legend: {
+            labels: { color: "#94a3b8", font: { family: "Inter", size: 12 } },
+          },
+          tooltip: {
+            backgroundColor: "rgba(15, 23, 42, 0.9)",
+            borderColor: "rgba(255, 255, 255, 0.1)",
+            borderWidth: 1,
+            titleFont: { family: "Inter" },
+            bodyFont: { family: "Inter" },
+            callbacks: {
+              label: (ctx) =>
+                `${ctx.dataset.label}: ${ctx.parsed.y?.toFixed(1)}°`,
+            },
+          },
+        },
+        scales: {
+          x: {
+            grid: { color: "rgba(255,255,255,0.04)" },
+            ticks: { color: "#64748b", font: { family: "Inter", size: 10 } },
+          },
+          y: {
+            grid: { color: "rgba(255,255,255,0.04)" },
+            ticks: { color: "#64748b", font: { family: "Inter", size: 10 } },
+          },
+        },
+      },
+    });
+  } catch (e) {
+    console.error("Failed to load history", e);
+    statsDiv.innerHTML =
+      '<span style="color:var(--accent-red)">获取历史信息失败</span>';
+  }
+}
+
+function closeHistoryModal() {
+  document.getElementById("historyModal").classList.add("hidden");
+}
+
 // ──────────────────────────────────────────────────────────
 //  Init
 // ──────────────────────────────────────────────────────────
@@ -834,6 +992,17 @@ document.addEventListener("DOMContentLoaded", async () => {
     if (e.key === "Escape") closePanel();
   });
 
+  // History Modal Events
+  document
+    .getElementById("btnShowHistory")
+    .addEventListener("click", openHistoryModal);
+  document
+    .getElementById("historyModalClose")
+    .addEventListener("click", closeHistoryModal);
+  document.getElementById("historyModal").addEventListener("click", (e) => {
+    if (e.target.id === "historyModal") closeHistoryModal();
+  });
+
   // Refresh all button
   document
     .getElementById("refreshAllBtn")

web/static/index.html

@@ -58,6 +58,7 @@
                 <div class="panel-meta">
                     <span id="panelRiskBadge" class="risk-badge">—</span>
                     <span id="panelLocalTime" class="local-time">—</span>
+                    <button class="history-btn" id="btnShowHistory" title="查看历史记录与准确率">📊 历史对账</button>
                 </div>
             </div>
         </div>
@@ -144,6 +145,22 @@
         <span>正在获取气象数据，请稍候...</span>
     </div>
 
+    <!-- ── History Chart Modal ── -->
+    <div id="historyModal" class="modal-overlay hidden">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h2>📊 <span id="historyModalTitle">历史准确率</span></h2>
+                <button class="modal-close" id="historyModalClose">✕</button>
+            </div>
+            <div class="modal-body">
+                <div class="history-stats" id="historyStats"></div>
+                <div class="history-chart-wrapper">
+                    <canvas id="historyChart"></canvas>
+                </div>
+            </div>
+        </div>
+    </div>
+
     <!-- Leaflet JS -->
     <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
     <!-- Chart.js -->

web/static/style.css

@@ -1032,3 +1032,110 @@ body {
     font-size: 14px;
   }
 }
+
+/* ── History Modal ── */
+.history-btn {
+  background: rgba(34, 211, 238, 0.1);
+  color: var(--accent-cyan);
+  border: 1px solid rgba(34, 211, 238, 0.3);
+  padding: 4px 10px;
+  border-radius: 6px;
+  font-size: 11px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: all 0.2s;
+  margin-left: 8px;
+}
+.history-btn:hover {
+  background: rgba(34, 211, 238, 0.2);
+  border-color: var(--accent-cyan);
+}
+
+.modal-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.6);
+  backdrop-filter: blur(4px);
+  z-index: 10000;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 16px;
+}
+
+.modal-content {
+  background: #111827;
+  border: 1px solid var(--border-subtle);
+  border-radius: 16px;
+  width: 100%;
+  max-width: 700px;
+  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
+  display: flex;
+  flex-direction: column;
+}
+
+.modal-header {
+  padding: 16px 20px;
+  border-bottom: 1px solid var(--border-subtle);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+.modal-header h2 {
+  font-size: 16px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0;
+}
+.modal-close {
+  background: none;
+  border: none;
+  font-size: 20px;
+  color: var(--text-muted);
+  cursor: pointer;
+  transition: color 0.2s;
+}
+.modal-close:hover {
+  color: var(--accent-red);
+}
+
+.modal-body {
+  padding: 20px;
+}
+
+.history-stats {
+  display: flex;
+  gap: 12px;
+  margin-bottom: 20px;
+  flex-wrap: wrap;
+}
+.h-stat-card {
+  flex: 1;
+  min-width: 110px;
+  background: rgba(255, 255, 255, 0.03);
+  border: 1px solid var(--border-subtle);
+  border-radius: 8px;
+  padding: 12px;
+  text-align: center;
+}
+.h-stat-card .label {
+  display: block;
+  font-size: 11px;
+  color: var(--text-muted);
+  margin-bottom: 4px;
+}
+.h-stat-card .val {
+  display: block;
+  font-size: 18px;
+  font-weight: 700;
+  color: var(--text-primary);
+}
+
+.history-chart-wrapper {
+  position: relative;
+  height: 300px;
+  width: 100%;
+}