diff --git a/rack/README.md b/rack/README.md
index de53e25..472e4bc 100644
--- a/rack/README.md
+++ b/rack/README.md
@@ -12,8 +12,8 @@
 | 目录 | 内容 |
 |---|---|
 | `backend/prrack/` | `protocol.py` 板侧协议镜像（命令白名单 / 事件表 / seq）· `bus.py` MQTT 抽象（paho / 进程内假 broker）· `hub.py` 核心 · `recovery.py` 自动恢复 · `db.py` 存储 · `firmware.py` 固件库 + OTA 命令 · `api.py` HTTP+WS · `simboard.py` 模拟板子 · `main.py` 入口 |
-| `backend/tests/` | 41 例（pytest），本机与服务器（Python 3.8）都跑 |
-| `frontend/` | Vue3 + Vite + Element Plus + ECharts（按需引入） |
+| `backend/tests/` | 42 例（pytest），本机与服务器（Python 3.8）都跑 |
+| `frontend/` | Vue3 + Vite + Element Plus + ECharts（按需引入）。主题在 `src/theme.css`（亮 / 暗两套变量，跟随系统），图表公共部分在 `src/chart.js` |
 | `deploy/` | `deploy.sh` 一键部署 · systemd unit · 每日备份 |
 
 ## 规矩（都来自板侧协议 §10.8，改代码前先看）
@@ -24,6 +24,18 @@
 4. **只绑 127.0.0.1**：`X-Auth-User`（门户覆盖式注入）按 L2 信任，只用于审计「谁按的」；`main.py` 拒绝非回环绑定。
 5. **命令白名单在 `protocol.build_command`**：`wifi` / `mqtt`（只收 USB）与 `events`（服务器自己同步）不给界面。板子的校验仍是唯一权威。
 
+## 界面（2026-09-27 改版）
+
+- 仪器前面板风格：每块板一块面板，五个「刀片槽」各有状态灯、电流读数和**最近两分钟电流小曲线**（平线 = 疑似卡死）。
+  只有要人看的状态（异常 / 故障 / 正在执行）上色，「运行」「断电」「空槽」保持安静；总览顶上一句话列出需要看的路。
+- 读数用 DIN 系等宽数字（系统自带：macOS/iOS `DIN Alternate`、Windows `Bahnschrift`），不加载网络字体（国内拉不到 Google Fonts）。
+- 暗色模式跟随系统（`html.dark`，Element Plus 的暗色变量也认它），图表在切换时重画。
+- 曲线**不用双 Y 轴**：一路的电流 / 电压、底板的温度 / 风扇，都是上下两块共用时间轴（dataviz 规矩）。
+  两路温度用 dataviz 参考调色板第 1/2 槽，按本页亮暗两种面板底色跑过 `validate_palette.js`，全部通过。
+- **底板温度曲线**：`GET /api/boards/{id}/history`（`Db.board_history`）。6 小时以内回每秒原始数据，更长回分钟聚合
+  `board_tele_min`（温度带每分钟 min/max、风扇、输入电压电流；与每路的 `tele_min` 一样留 90 天）。
+  NTC1 贴 Hub 稳压 U31，NTC2 贴输入降压 U37（R2 规划 §32）。
+
 ## 推固件（OTA，板侧 C2）
 
 界面「固件」页：上传 `firmware/build/phonerail.bin` → 选板子推送。进度、待验证、回滚都直接显示遥测里的 `ota` 一块。
diff --git a/rack/backend/prrack/api.py b/rack/backend/prrack/api.py
index 9f1dc2b..4886f44 100644
--- a/rack/backend/prrack/api.py
+++ b/rack/backend/prrack/api.py
@@ -108,6 +108,12 @@ def create_app(hub: Hub, rec: RecoveryManager, static_dir: Optional[str] = None,
         except CmdTimeout as e:
             raise HTTPException(504, str(e))
 
+    @app.get("/api/boards/{board}/history")
+    def board_history(board: str, start: int, end: Optional[int] = None):
+        """整板曲线（温度 / 风扇 / 输入），见 Db.board_history。"""
+        _board_or_404(hub, board)
+        return hub.db.board_history(board, start, end or now_ms())
+
     @app.get("/api/boards/{board}/rails/{rail}/history")
     def history(board: str, rail: int, start: int, end: Optional[int] = None):
         _board_or_404(hub, board)
diff --git a/rack/backend/prrack/db.py b/rack/backend/prrack/db.py
index 1b324dd..7b2eba1 100644
--- a/rack/backend/prrack/db.py
+++ b/rack/backend/prrack/db.py
@@ -52,6 +52,14 @@ CREATE TABLE IF NOT EXISTS board_tele (
     in_mv INTEGER, in_ua INTEGER, temp0 INTEGER, temp1 INTEGER, fan_duty INTEGER
 );
 CREATE INDEX IF NOT EXISTS board_tele_idx ON board_tele (board_id, ts);
+-- 整板遥测的分钟聚合（温度 / 风扇 / 输入），和 tele_min 一样留 90 天：「前天夜里底板多热」要看得到
+CREATE TABLE IF NOT EXISTS board_tele_min (
+    ts INTEGER NOT NULL, board_id TEXT NOT NULL,
+    t0_avg INTEGER, t0_min INTEGER, t0_max INTEGER,
+    t1_avg INTEGER, t1_min INTEGER, t1_max INTEGER,
+    fan_avg INTEGER, in_mv_avg INTEGER, in_ua_avg INTEGER, n INTEGER,
+    PRIMARY KEY (board_id, ts)
+);
 CREATE TABLE IF NOT EXISTS events (
     board_id TEXT NOT NULL, seq INTEGER NOT NULL,
     t_ms INTEGER, rail INTEGER, type INTEGER, arg INTEGER, mv INTEGER, ua INTEGER,
@@ -162,7 +170,17 @@ class Db:
                 "CAST(AVG(ua) AS INTEGER), MIN(ua), MAX(ua), COUNT(*) FROM tele "
                 "WHERE ts >= ? AND ts < ? AND ua IS NOT NULL GROUP BY m, board_id, rail",
                 (start, upto))
-            return cur.rowcount
+            n = cur.rowcount
+            row = self.conn.execute("SELECT MAX(ts) FROM board_tele_min").fetchone()
+            bstart = (row[0] + 60000) if row[0] is not None else 0
+            cur = self.conn.execute(
+                "INSERT OR IGNORE INTO board_tele_min (ts, board_id, t0_avg, t0_min, t0_max, t1_avg, t1_min, "
+                "t1_max, fan_avg, in_mv_avg, in_ua_avg, n) "
+                "SELECT ts/60000*60000 AS m, board_id, CAST(AVG(temp0) AS INTEGER), MIN(temp0), MAX(temp0), "
+                "CAST(AVG(temp1) AS INTEGER), MIN(temp1), MAX(temp1), CAST(AVG(fan_duty) AS INTEGER), "
+                "CAST(AVG(in_mv) AS INTEGER), CAST(AVG(in_ua) AS INTEGER), COUNT(*) FROM board_tele "
+                "WHERE ts >= ? AND ts < ? GROUP BY m, board_id", (bstart, upto))
+            return n + cur.rowcount
 
     def prune(self, now: Optional[int] = None):
         t = now if now is not None else now_ms()
@@ -170,6 +188,7 @@ class Db:
             self.conn.execute("DELETE FROM tele WHERE ts < ?", (t - RAW_KEEP_S * 1000,))
             self.conn.execute("DELETE FROM board_tele WHERE ts < ?", (t - RAW_KEEP_S * 1000,))
             self.conn.execute("DELETE FROM tele_min WHERE ts < ?", (t - MIN_KEEP_S * 1000,))
+            self.conn.execute("DELETE FROM board_tele_min WHERE ts < ?", (t - MIN_KEEP_S * 1000,))
 
     def history(self, board: str, rail: int, t0: int, t1: int, max_points: int = 1500) -> dict:
         """[t0, t1) 的电压电流曲线。跨度 ≤ 原始数据保留期且点数不多时回原始 1 s 数据，
@@ -192,3 +211,29 @@ class Db:
             res = "minute"
         return {"resolution": res, "bucket_ms": bucket,
                 "points": [[r["t"], r["mv"], r["ua"], r["ua_min"], r["ua_max"]] for r in rows]}
+
+    def board_history(self, board: str, t0: int, t1: int, max_points: int = 1500) -> dict:
+        """[t0, t1) 的整板曲线：两路 NTC 温度（m°C，带每桶 min/max）、风扇占空比（‰）、输入电压电流。
+        取数规则同 `history()`：近期短跨度回原始 1 s，否则回分钟聚合。
+        points：[t, t0, t0_min, t0_max, t1, t1_min, t1_max, fan, in_mv, in_ua]；读不到的是 None。"""
+        span = max(1, t1 - t0)
+        raw_ok = t0 >= now_ms() - RAW_KEEP_S * 1000 and span <= 6 * 3600 * 1000
+        if raw_ok:
+            bucket = max(1000, span // max_points)
+            rows = self.q(
+                "SELECT ts/?*? AS t, CAST(AVG(temp0) AS INTEGER) a0, MIN(temp0) n0, MAX(temp0) x0, "
+                "CAST(AVG(temp1) AS INTEGER) a1, MIN(temp1) n1, MAX(temp1) x1, CAST(AVG(fan_duty) AS INTEGER) f, "
+                "CAST(AVG(in_mv) AS INTEGER) mv, CAST(AVG(in_ua) AS INTEGER) ua FROM board_tele "
+                "WHERE board_id=? AND ts>=? AND ts<? GROUP BY t ORDER BY t", (bucket, bucket, board, t0, t1))
+            res = "raw"
+        else:
+            bucket = max(60000, span // max_points // 60000 * 60000)
+            rows = self.q(
+                "SELECT ts/?*? AS t, CAST(AVG(t0_avg) AS INTEGER) a0, MIN(t0_min) n0, MAX(t0_max) x0, "
+                "CAST(AVG(t1_avg) AS INTEGER) a1, MIN(t1_min) n1, MAX(t1_max) x1, CAST(AVG(fan_avg) AS INTEGER) f, "
+                "CAST(AVG(in_mv_avg) AS INTEGER) mv, CAST(AVG(in_ua_avg) AS INTEGER) ua FROM board_tele_min "
+                "WHERE board_id=? AND ts>=? AND ts<? GROUP BY t ORDER BY t", (bucket, bucket, board, t0, t1))
+            res = "minute"
+        return {"resolution": res, "bucket_ms": bucket,
+                "points": [[r["t"], r["a0"], r["n0"], r["x0"], r["a1"], r["n1"], r["x1"], r["f"], r["mv"], r["ua"]]
+                           for r in rows]}
diff --git a/rack/backend/tests/test_api.py b/rack/backend/tests/test_api.py
index d533f20..031f1b6 100644
--- a/rack/backend/tests/test_api.py
+++ b/rack/backend/tests/test_api.py
@@ -129,3 +129,27 @@ def test_a_real_websocket_library_is_installed():
     deploy.sh 在服务器上跑这套测试，所以缺库会在换上去之前被拦住。"""
     from prrack.main import ws_library_ok
     assert ws_library_ok()
+
+
+def test_board_history_raw_and_minute(env):
+    c, hub, sim, db = env
+    base = now_ms() // 60000 * 60000 - 3 * 60000
+    rows = [(base + i * 1000, B, 12000, 1500000, 35000 + i, 40000 - i, 300) for i in range(120)]
+    db.many("INSERT INTO board_tele VALUES (?,?,?,?,?,?,?)", rows)
+    h = c.get("/api/boards/%s/history" % B, params={"start": base, "end": base + 120000}).json()
+    assert h["resolution"] == "raw" and len(h["points"]) >= 100
+    p = h["points"][0]
+    assert p[1] == 35000 and p[4] == 40000 and p[7] == 300 and p[8] == 12000
+    # 分钟聚合：两个整分钟，每分钟 min/max 就是那一分钟里的首尾
+    assert db.downsample(base + 180000) > 0
+    m = db.board_history(B, base, base + 120000 + 1)  # 跨度小也能强制走聚合：t0 早于原始保留期时
+    rows_min = db.q("SELECT * FROM board_tele_min WHERE board_id=? ORDER BY ts", (B,))
+    assert [r["t0_min"] for r in rows_min][:2] == [35000, 35060]
+    assert [r["t0_max"] for r in rows_min][:2] == [35059, 35119]
+    assert rows_min[0]["t1_min"] == 40000 - 59 and rows_min[0]["fan_avg"] == 300
+    assert m["resolution"] == "raw"
+    old = db.board_history(B, base - 10 * 86400000, base + 120000)
+    # 10 天跨度 ⇒ 桶约 9 分钟，两分钟落进同一桶：min 取两分钟的最小、max 取最大
+    assert old["resolution"] == "minute" and old["points"][0][2] == 35000
+    assert max(p[3] for p in old["points"]) == 35119
+    assert c.get("/api/boards/nope/history", params={"start": 0}).status_code == 404
diff --git a/rack/backend/tests/test_firmware.py b/rack/backend/tests/test_firmware.py
index 1ebcd6a..bcb83d7 100644
--- a/rack/backend/tests/test_firmware.py
+++ b/rack/backend/tests/test_firmware.py
@@ -199,8 +199,13 @@ def test_ota_events_are_named_by_arg(env):
     c, hub, sim = env
     sim._ev(0, 18, 3, 3, 996064)  # 失败：哈希不对
     sim._ev(0, 18, 5)             # 回滚
-    sim.tick(now_ms())
-    assert wait_for(lambda: len([e for e in c.get("/api/events").json() if e["type"] == 18]) == 2)
+
+    # 每次检查前都推一条遥测：Hub 正在同步上一批事件（启动时的 BOOT）时会跳过这一条遥测带来的
+    # 「有新事件」，只推一次的话偶尔再也没人触发同步（服务器上 3 次里红过 1 次）。真板 1 s 一条，没有这个问题。
+    def synced():
+        sim.tick(now_ms())
+        return len([e for e in c.get("/api/events").json() if e["type"] == 18]) == 2
+    assert wait_for(synced)
     ev = {e["arg"]: e for e in c.get("/api/events").json() if e["type"] == 18}
     assert ev[3]["name"] == "固件升级（失败）：哈希不对" and ev[3]["severe"] is True
     assert ev[5]["name"] == "固件升级（回滚）" and ev[5]["severe"] is True
diff --git a/rack/frontend/src/App.vue b/rack/frontend/src/App.vue
index 664968d..d70ffe4 100644
--- a/rack/frontend/src/App.vue
+++ b/rack/frontend/src/App.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="shell">
     <header class="top">
-      <router-link to="/" class="brand">PhoneRail 机架</router-link>
+      <router-link to="/" class="brand"><span class="mark" aria-hidden="true" />PhoneRail 机架</router-link>
       <nav>
         <router-link to="/">总览</router-link>
         <router-link to="/events">事件</router-link>
@@ -9,10 +9,9 @@
         <router-link to="/recovery">自动恢复</router-link>
         <router-link to="/firmware">固件</router-link>
       </nav>
-      <div class="conn">
-        <span :class="['dot', state.ws ? 'up' : 'down']" :title="state.ws ? '已连上服务器' : '与服务器断开，重连中'" />
-        <span v-if="!state.ws" class="warn">断开</span>
-        <span v-else-if="!state.mqtt" class="warn" title="后端连不上 MQTT broker：所有板子都会显示通信中断">broker 断开</span>
+      <div class="conn" :title="connTitle">
+        <span :class="['led', connLevel]" />
+        <span class="ct">{{ connText }}</span>
         <span class="user">{{ state.user }}</span>
       </div>
     </header>
@@ -21,33 +20,36 @@
 </template>
 
 <script setup>
+import { computed } from 'vue'
 import { state } from './store'
+
+const connLevel = computed(() => (!state.ws ? 'bad' : !state.mqtt ? 'warn' : 'ok'))
+const connText = computed(() => (!state.ws ? '与服务器断开' : !state.mqtt ? 'broker 断开' : '已连接'))
+const connTitle = computed(() => (!state.ws ? '浏览器与后端断开，正在重连'
+  : !state.mqtt ? '后端连不上 MQTT broker：所有板子都会显示通信中断' : '实时数据正常'))
 </script>
 
 <style>
-:root { --bg: #f1f5f9; --card: #fff; --line: #e2e8f0; --muted: #64748b; }
-* { box-sizing: border-box; }
-body { margin: 0; background: var(--bg); font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif; color: #0f172a; }
 .shell { min-height: 100vh; }
-.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px;
-  padding: 0 16px; height: 52px; background: #0f172a; color: #fff; }
-.top a { color: #cbd5e1; text-decoration: none; }
-.top .brand { color: #fff; font-weight: 600; white-space: nowrap; }
-.top nav { display: flex; gap: 14px; overflow-x: auto; flex: 1; min-width: 0; }
-.top nav a { white-space: nowrap; padding: 4px 0; }
-.top nav a.router-link-exact-active { color: #fff; border-bottom: 2px solid #38bdf8; }
-.conn { display: flex; align-items: center; gap: 8px; font-size: 13px; white-space: nowrap; }
-.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
-.dot.up { background: #22c55e; } .dot.down { background: #ef4444; }
-.conn .warn { color: #fca5a5; }
-.conn .user { color: #94a3b8; }
-main { padding: 16px; max-width: 1400px; margin: 0 auto; }
-.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
-.muted { color: var(--muted); font-size: 13px; }
+.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 20px;
+  padding: 0 20px; height: 54px; background: var(--bar); border-bottom: 1px solid var(--line); }
+.top a { color: var(--ink-2); text-decoration: none; }
+.top .brand { color: var(--ink); font-weight: 700; white-space: nowrap; display: flex; align-items: center; gap: 8px;
+  letter-spacing: .01em; }
+/* 标志：一块板上五个槽 */
+.top .mark { width: 22px; height: 14px; border-radius: 3px; border: 2px solid var(--ink);
+  background: repeating-linear-gradient(90deg, transparent 0 2px, var(--ink) 2px 3px, transparent 3px 3.6px); }
+.top nav { display: flex; gap: 4px; overflow-x: auto; flex: 1; min-width: 0; scrollbar-width: none; }
+.top nav a { white-space: nowrap; padding: 6px 10px; border-radius: 6px; }
+.top nav a:hover { color: var(--ink); background: var(--bay); }
+.top nav a.router-link-exact-active { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
+.conn { display: flex; align-items: center; gap: 8px; font-size: 13px; white-space: nowrap; color: var(--ink-2); }
+.conn .user { color: var(--muted); padding-left: 8px; border-left: 1px solid var(--line); }
+main { padding: 20px; max-width: 1440px; margin: 0 auto; }
 @media (max-width: 640px) {
-  .top { gap: 10px; padding: 0 10px; }
-  .top .brand { display: none; }
-  .conn .user { display: none; }
-  main { padding: 10px; }
+  .top { gap: 8px; padding: 0 10px; height: 50px; }
+  .top .brand { font-size: 0; gap: 0; }
+  .conn .ct, .conn .user { display: none; }
+  main { padding: 12px 10px; }
 }
 </style>
diff --git a/rack/frontend/src/api.js b/rack/frontend/src/api.js
index 0106794..50aef89 100644
--- a/rack/frontend/src/api.js
+++ b/rack/frontend/src/api.js
@@ -24,6 +24,8 @@ export const api = {
   patchPhone: (board, rail, body) => req('PATCH', `/api/boards/${board}/rails/${rail}`, body),
   history: (board, rail, start, end) =>
     req('GET', `/api/boards/${board}/rails/${rail}/history?start=${start}${end ? `&end=${end}` : ''}`),
+  boardHistory: (board, start, end) =>
+    req('GET', `/api/boards/${board}/history?start=${start}${end ? `&end=${end}` : ''}`),
   events: (q = {}) => req('GET', '/api/events?' + new URLSearchParams(q)),
   audit: (q = {}) => req('GET', '/api/audit?' + new URLSearchParams(q)),
   recovery: () => req('GET', '/api/recovery'),
diff --git a/rack/frontend/src/chart.js b/rack/frontend/src/chart.js
new file mode 100644
index 0000000..5ebffca
--- /dev/null
+++ b/rack/frontend/src/chart.js
@@ -0,0 +1,57 @@
+// ECharts 的公共部分：按需引入 + 取色 + 两张上下叠放的图共用一条时间轴。
+//
+// 规矩（dataviz skill）：
+//  · 不用双 Y 轴 —— 电流和电压、温度和风扇，一律上下两个 grid，共用 x（dataZoom 联动）；
+//  · 系列色取参考调色板第 1/2 槽，按本页亮暗两种面板底色跑过 validate_palette.js（全部通过）；
+//  · 文字一律用墨色 / 次墨色，不用系列色；网格线用最浅的细线；
+//  · 线宽 2px，不画数据点；min~max 画成同色 15% 的带子。
+import * as echarts from 'echarts/core'
+import { LineChart } from 'echarts/charts'
+import { GridComponent, TooltipComponent, LegendComponent, DataZoomComponent, AxisPointerComponent } from 'echarts/components'
+import { CanvasRenderer } from 'echarts/renderers'
+import { cssVar, dark } from './theme'
+
+echarts.use([LineChart, GridComponent, TooltipComponent, LegendComponent, DataZoomComponent, AxisPointerComponent, CanvasRenderer])
+export { echarts }
+
+const SERIES = { light: ['#2a78d6', '#eb6834'], dark: ['#3987e5', '#d95926'] }
+
+export function palette() {
+  const s = SERIES[dark.value ? 'dark' : 'light']
+  return {
+    s1: s[0], s2: s[1],
+    ink: cssVar('--ink'), ink2: cssVar('--ink-2'), muted: cssVar('--muted'),
+    grid: cssVar('--line-soft'), axis: cssVar('--line'), panel: cssVar('--panel'), bay: cssVar('--bay'),
+  }
+}
+
+export function band(hex, a = 0.15) {
+  const n = parseInt(hex.slice(1), 16)
+  return `rgba(${n >> 16},${(n >> 8) & 255},${n & 255},${a})`
+}
+
+// 上下两块：上面主图（高），下面副图（矮）。返回 grid / xAxis / dataZoom 的公共配置。
+export function stacked(p, { topName, bottomName, topFmt, bottomFmt, bottomMin, bottomMax, topMin, topMax, bottomInterval }) {
+  const axisLabel = { color: p.muted, fontSize: 11 }
+  const x = i => ({
+    type: 'time', gridIndex: i, axisLine: { lineStyle: { color: p.axis } }, axisTick: { show: false },
+    axisLabel: { ...axisLabel, show: i === 1, hideOverlap: true }, splitLine: { show: false },
+  })
+  const y = (i, name, fmt, min, max, interval) => ({
+    type: 'value', gridIndex: i, name, nameTextStyle: { color: p.muted, fontSize: 11, align: 'left', padding: [0, 0, 0, -30] },
+    scale: true, min, max, interval, splitNumber: i === 0 ? 4 : 2, axisLabel: { ...axisLabel, formatter: fmt },
+    splitLine: { lineStyle: { color: p.grid } }, axisLine: { show: false }, axisTick: { show: false },
+  })
+  return {
+    animation: false,
+    textStyle: { fontFamily: getComputedStyle(document.body).fontFamily },
+    grid: [{ left: 48, right: 16, top: 30, height: '48%' }, { left: 48, right: 16, top: '75%', bottom: 44 }],
+    xAxis: [x(0), x(1)],
+    yAxis: [y(0, topName, topFmt, topMin, topMax), y(1, bottomName, bottomFmt, bottomMin, bottomMax, bottomInterval)],
+    axisPointer: { link: [{ xAxisIndex: 'all' }], lineStyle: { color: p.muted } },
+    dataZoom: [{ type: 'inside', xAxisIndex: [0, 1] },
+      { type: 'slider', xAxisIndex: [0, 1], height: 16, bottom: 8, borderColor: p.axis, fillerColor: band(p.s1, 0.12),
+        dataBackground: { lineStyle: { color: p.axis }, areaStyle: { color: p.bay } }, textStyle: { color: p.muted } }],
+    tooltip: { trigger: 'axis', backgroundColor: p.panel, borderColor: p.axis, textStyle: { color: p.ink, fontSize: 12 } },
+  }
+}
diff --git a/rack/frontend/src/components/BoardChart.vue b/rack/frontend/src/components/BoardChart.vue
new file mode 100644
index 0000000..22455e5
--- /dev/null
+++ b/rack/frontend/src/components/BoardChart.vue
@@ -0,0 +1,108 @@
+<template>
+  <section class="card bc">
+    <div class="hh">
+      <h2 class="ttl">底板温度</h2>
+      <RangePicker v-model="range" />
+    </div>
+    <div class="legend" aria-hidden="true">
+      <span><i :style="{ background: c.s1 }" />NTC1　Hub 稳压旁（U31）</span>
+      <span><i :style="{ background: c.s2 }" />NTC2　输入降压旁（U37）</span>
+    </div>
+    <div ref="el" class="chart" role="img" aria-label="底板两路温度与风扇占空比曲线" />
+    <p class="muted note">{{ note }}</p>
+  </section>
+</template>
+
+<script setup>
+// 底板两路 NTC 温度（上）+ 风扇占空比（下）。温度两条线用 dataviz 参考调色板第 1/2 槽，
+// 亮暗两种面板底色都跑过 validate_palette.js（CVD ΔE ≥ 24，对比 ≥ 3:1）。
+// 图例用自绘的一行（带位置说明），曲线末端不再直接标名：两条线常常贴得很近，标签会打架。
+import { onBeforeUnmount, onMounted, ref, watch } from 'vue'
+import RangePicker from './RangePicker.vue'
+import { api } from '../api'
+import { onMessage } from '../store'
+import { dark } from '../theme'
+import { echarts, palette, band, stacked } from '../chart'
+
+const props = defineProps({ board: String })
+const range = ref(3600e3)
+const el = ref(null)
+const note = ref('')
+const c = ref(palette())
+let chart = null
+let pts = [] // [t, t0, t0min, t0max, t1, t1min, t1max, fan, in_mv, in_ua]
+let live = false
+
+const degC = v => (v == null ? null : v / 1000)
+
+function render() {
+  const p = palette()
+  c.value = p
+  const hasBand = pts.some(x => x[2] != null && x[2] !== x[3])
+  const bandOf = (lo, hi, color) => [
+    { type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], degC(x[lo])]), stack: `b${lo}`,
+      symbol: 'none', lineStyle: { opacity: 0 }, silent: true, tooltip: { show: false } },
+    { type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], x[hi] == null || x[lo] == null ? null : (x[hi] - x[lo]) / 1000]),
+      stack: `b${lo}`, symbol: 'none', lineStyle: { opacity: 0 }, areaStyle: { color: band(color, 0.12) }, silent: true, tooltip: { show: false } },
+  ]
+  const fmtC = v => (v == null ? '—' : `${v.toFixed(1)} °C`)
+  chart.setOption({
+    ...stacked(p, {
+      topName: '温度 °C', bottomName: '风扇 %',
+      topFmt: v => v.toFixed(0), bottomFmt: v => v.toFixed(0), bottomMin: 0, bottomMax: 100, bottomInterval: 50,
+      // 温度按数据撑满，但至少 10 °C 的跨度：别把 0.2 °C 的抖动放大成山峰
+      topMin: v => Math.floor(Math.min(v.min, (v.min + v.max) / 2 - 5)), topMax: v => Math.ceil(Math.max(v.max, (v.min + v.max) / 2 + 5)),
+    }),
+    series: [
+      ...(hasBand ? [...bandOf(2, 3, p.s1), ...bandOf(5, 6, p.s2)] : []),
+      { name: 'NTC1', type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], degC(x[1])]), symbol: 'none',
+        lineStyle: { width: 2 }, color: p.s1, tooltip: { valueFormatter: fmtC } },
+      { name: 'NTC2', type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], degC(x[4])]), symbol: 'none',
+        lineStyle: { width: 2 }, color: p.s2, tooltip: { valueFormatter: fmtC } },
+      { name: '风扇', type: 'line', xAxisIndex: 1, yAxisIndex: 1, step: 'end', data: pts.map(x => [x[0], x[7] == null ? null : x[7] / 10]),
+        symbol: 'none', lineStyle: { width: 2 }, color: p.ink2, tooltip: { valueFormatter: v => (v == null ? '—' : `${v.toFixed(0)} %`) } },
+    ],
+  }, true)
+}
+
+async function load() {
+  const end = Date.now()
+  try {
+    const h = await api.boardHistory(props.board, end - range.value, end)
+    pts = h.points
+    live = h.resolution === 'raw' && range.value <= 3600e3
+    note.value = pts.length === 0 ? '这段时间没有温度数据（板子离线，或者刚上线）'
+      : h.resolution === 'raw' ? `每秒一个点${live ? '，实时追加' : ''}`
+        : '每分钟一个点；浅色带是这一分钟里的最低到最高温度'
+    render()
+  } catch (e) {
+    note.value = '曲线没取到：' + e.message
+  }
+}
+
+const off = onMessage(m => {
+  if (!live || m.t !== 'tele' || m.board !== props.board) return
+  const s = m.status
+  const t = s.temp || []
+  pts.push([m.ts, t[0], t[0], t[0], t[1], t[1], t[1], s.fan?.duty, s.in?.mv, s.in?.ua])
+  const cut = Date.now() - range.value
+  while (pts.length && pts[0][0] < cut) pts.shift()
+  render()
+})
+
+const onResize = () => chart && chart.resize()
+onMounted(() => { chart = echarts.init(el.value); load(); window.addEventListener('resize', onResize) })
+onBeforeUnmount(() => { off(); window.removeEventListener('resize', onResize); chart && chart.dispose() })
+watch(() => [props.board, range.value], load)
+watch(dark, () => chart && render())
+</script>
+
+<style scoped>
+.hh { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
+.hh .ttl { margin: 0; }
+.legend { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13px; color: var(--ink-2); margin-top: 8px; }
+.legend i { display: inline-block; width: 14px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }
+.chart { height: 320px; }
+.note { margin: 4px 0 0; }
+@media (max-width: 520px) { .chart { height: 260px; } }
+</style>
diff --git a/rack/frontend/src/components/HistoryChart.vue b/rack/frontend/src/components/HistoryChart.vue
index 488c7c8..9afc23b 100644
--- a/rack/frontend/src/components/HistoryChart.vue
+++ b/rack/frontend/src/components/HistoryChart.vue
@@ -1,58 +1,55 @@
 <template>
-  <div class="card hc">
+  <section class="card hc">
     <div class="hh">
-      <b>第 {{ rail }} 路 · 电流 / 电压</b>
-      <el-radio-group v-model="range" size="small">
-        <el-radio-button v-for="o in RANGES" :key="o.v" :value="o.v">{{ o.t }}</el-radio-button>
-      </el-radio-group>
+      <h2 class="ttl">第 {{ rail }} 路</h2>
+      <RangePicker v-model="range" />
     </div>
-    <div ref="el" class="chart" />
-    <div class="muted">{{ note }}</div>
-  </div>
+    <div ref="el" class="chart" role="img" :aria-label="`第 ${rail} 路电流与电压曲线`" />
+    <p class="muted note">{{ note }}</p>
+  </section>
 </template>
 
 <script setup>
+// 一路的电流（上）与电压（下）。**不用双 Y 轴**：3.9 V 上的几十毫伏起伏和几百 mA 的电流
+// 放在一张图的两个刻度上，谁也看不清（dataviz 头号反模式）。上下两块共用时间轴，缩放联动。
 import { onBeforeUnmount, onMounted, ref, watch } from 'vue'
-// 按需引入：整包 echarts ≈340 KB（gzip），手机上打开板子页要等好几秒
-import * as echarts from 'echarts/core'
-import { LineChart } from 'echarts/charts'
-import { GridComponent, TooltipComponent, LegendComponent, DataZoomComponent } from 'echarts/components'
-import { CanvasRenderer } from 'echarts/renderers'
-echarts.use([LineChart, GridComponent, TooltipComponent, LegendComponent, DataZoomComponent, CanvasRenderer])
+import RangePicker from './RangePicker.vue'
 import { api } from '../api'
 import { onMessage } from '../store'
+import { dark } from '../theme'
+import { echarts, palette, band, stacked } from '../chart'
 
 const props = defineProps({ board: String, rail: Number })
-const RANGES = [
-  { v: 600e3, t: '10 分钟' }, { v: 3600e3, t: '1 小时' }, { v: 6 * 3600e3, t: '6 小时' },
-  { v: 86400e3, t: '1 天' }, { v: 7 * 86400e3, t: '7 天' },
-]
 const range = ref(600e3)
 const el = ref(null)
 const note = ref('')
 let chart = null
-let pts = []    // [t, mv, ua, ua_min, ua_max]
+let pts = [] // [t, mv, ua, ua_min, ua_max]
 let live = false
 
 function render() {
-  const band = pts.some(p => p[3] != null && p[3] !== p[4])
+  const p = palette()
+  const hasBand = pts.some(x => x[3] != null && x[3] !== x[4])
+  const mA = v => (v == null ? null : v / 1000)
   chart.setOption({
-    animation: false,
-    grid: { left: 50, right: 50, top: 30, bottom: 50 },
-    tooltip: { trigger: 'axis', valueFormatter: v => (v == null ? '—' : v.toFixed(1)) },
-    legend: { data: ['电流 mA', '电压 V'], top: 0 },
-    dataZoom: [{ type: 'inside' }, { type: 'slider', height: 18, bottom: 8 }],
-    xAxis: { type: 'time' },
-    yAxis: [{ type: 'value', name: 'mA', scale: true }, // 电压几乎恒定：不固定范围的话 echarts 会把 3.9 V 画在 1~6 V 的正中间，一点起伏都看不出
-      { type: 'value', name: 'V', min: v => Math.min(3.4, Math.floor(v.min * 10) / 10), max: v => Math.max(4.2, Math.ceil(v.max * 10) / 10), splitLine: { show: false } }],
+    ...stacked(p, {
+      topName: '电流 mA', bottomName: '电压 V',
+      topFmt: v => v.toFixed(0), bottomFmt: v => v.toFixed(2),
+      // 电压固定 3.5~4.1 V（硬件可调范围 3.524~4.010 V 全在里面），每 0.3 V 一格：
+      // 不固定的话 echarts 会把 3.9 V 画在 1~6 V 正中间；自动取整的刻度在这么矮的图上会挤成一团
+      bottomMin: 3.5, bottomMax: 4.1, bottomInterval: 0.3,
+    }),
     series: [
-      // 分钟聚合时把 min/max 画成带状：「这一分钟里电流动没动」比均值更能看出卡死
-      ...(band ? [
-        { name: 'min', type: 'line', data: pts.map(p => [p[0], p[3] / 1000]), lineStyle: { opacity: 0 }, stack: 'b', symbol: 'none', silent: true, tooltip: { show: false } },
-        { name: 'max', type: 'line', data: pts.map(p => [p[0], (p[4] - p[3]) / 1000]), lineStyle: { opacity: 0 }, areaStyle: { color: 'rgba(37,99,235,.15)' }, stack: 'b', symbol: 'none', silent: true, tooltip: { show: false } },
+      ...(hasBand ? [
+        { type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], mA(x[3])]), stack: 'b', symbol: 'none',
+          lineStyle: { opacity: 0 }, silent: true, tooltip: { show: false } },
+        { type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], x[4] == null ? null : (x[4] - x[3]) / 1000]),
+          stack: 'b', symbol: 'none', lineStyle: { opacity: 0 }, areaStyle: { color: band(p.s1) }, silent: true, tooltip: { show: false } },
       ] : []),
-      { name: '电流 mA', type: 'line', data: pts.map(p => [p[0], p[2] == null ? null : p[2] / 1000]), symbol: 'none', color: '#2563eb', connectNulls: false },
-      { name: '电压 V', type: 'line', yAxisIndex: 1, data: pts.map(p => [p[0], p[1] == null ? null : p[1] / 1000]), symbol: 'none', color: '#16a34a' },
+      { name: '电流', type: 'line', xAxisIndex: 0, yAxisIndex: 0, data: pts.map(x => [x[0], mA(x[2])]), symbol: 'none',
+        lineStyle: { width: 2 }, color: p.s1, tooltip: { valueFormatter: v => (v == null ? '—' : `${v.toFixed(0)} mA`) } },
+      { name: '电压', type: 'line', xAxisIndex: 1, yAxisIndex: 1, data: pts.map(x => [x[0], x[1] == null ? null : x[1] / 1000]),
+        symbol: 'none', lineStyle: { width: 2 }, color: p.s1, tooltip: { valueFormatter: v => (v == null ? '—' : `${v.toFixed(3)} V`) } },
     ],
   }, true)
 }
@@ -63,11 +60,12 @@ async function load() {
     const h = await api.history(props.board, props.rail, end - range.value, end)
     pts = h.points
     live = h.resolution === 'raw' && range.value <= 3600e3
-    note.value = `${h.resolution === 'raw' ? '原始数据' : '分钟聚合（带状 = 每分钟最小~最大）'} · ${pts.length} 点` +
-      (live ? ' · 实时追加' : '')
+    note.value = h.resolution === 'raw'
+      ? `每秒一个点${live ? '，实时追加' : ''}`
+      : '每分钟一个点；浅色带是这一分钟里电流的最小到最大，带子塌成一条线说明电流不动了'
     render()
   } catch (e) {
-    note.value = '加载失败：' + e.message
+    note.value = '曲线没取到：' + e.message
   }
 }
 
@@ -85,10 +83,13 @@ const onResize = () => chart && chart.resize()
 onMounted(() => { chart = echarts.init(el.value); load(); window.addEventListener('resize', onResize) })
 onBeforeUnmount(() => { off(); window.removeEventListener('resize', onResize); chart && chart.dispose() })
 watch(() => [props.board, props.rail, range.value], load)
+watch(dark, () => chart && render())
 </script>
 
 <style scoped>
 .hh { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
-.chart { height: 320px; margin-top: 8px; }
-@media (max-width: 520px) { .chart { height: 240px; } }
+.hh .ttl { margin: 0; }
+.chart { height: 340px; margin-top: 6px; }
+.note { margin: 4px 0 0; }
+@media (max-width: 520px) { .chart { height: 280px; } }
 </style>
diff --git a/rack/frontend/src/components/OtaState.vue b/rack/frontend/src/components/OtaState.vue
index 20573c8..022bc4b 100644
--- a/rack/frontend/src/components/OtaState.vue
+++ b/rack/frontend/src/components/OtaState.vue
@@ -8,7 +8,7 @@
     <el-tag v-if="o.pend" type="warning" size="small" title="新固件还没连上 broker；120 s 内连不上会自动回滚">待验证</el-tag>
     <el-tag v-if="o.err && o.st !== 'dl'" type="danger" size="small">上次失败：{{ OTA_ERR_ZH[o.err] || o.err }}</el-tag>
     <el-tag v-if="o.bad" type="danger" size="small" effect="plain" title="这份固件在板子上没通过自证健康，被回滚掉了">回滚过：{{ o.bad }}</el-tag>
-    <span v-if="!busy && !o.pend && !o.err && !o.bad && o.st !== 'ready'" class="muted">—</span>
+    <span v-if="!quiet && !busy && !o.pend && !o.err && !o.bad && o.st !== 'ready'" class="muted">—</span>
   </span>
 </template>
 
@@ -17,7 +17,7 @@
 import { computed } from 'vue'
 import { OTA_ERR_ZH } from '../api'
 
-const props = defineProps({ status: Object })
+const props = defineProps({ status: Object, quiet: Boolean }) // quiet：没事时什么都不显示（不画「—」）
 const o = computed(() => props.status?.ota || {})
 const busy = computed(() => o.value.st === 'dl')
 const pct = computed(() => (o.value.size ? Math.floor((o.value.got / o.value.size) * 100) : 0))
diff --git a/rack/frontend/src/components/RailCard.vue b/rack/frontend/src/components/RailCard.vue
index 13cba7e..5786639 100644
--- a/rack/frontend/src/components/RailCard.vue
+++ b/rack/frontend/src/components/RailCard.vue
@@ -1,14 +1,17 @@
 <template>
-  <div class="card rail" :class="{ sel: selected }" :style="{ borderTopColor: LEVEL_COLOR[h.level] }" @click="$emit('select')">
+  <div class="card rail" :class="[{ sel: selected }, h.level]" role="button" tabindex="0"
+       :aria-pressed="selected" :aria-label="`第 ${rail} 路，${h.text}，点击查看曲线`"
+       @click="$emit('select')" @keydown.enter.self="$emit('select')">
     <div class="rh">
-      <span class="no">{{ rail }}</span>
-      <el-input v-model="label" size="small" class="label" placeholder="手机编号" @change="saveLabel" @click.stop />
-      <el-tag :color="LEVEL_COLOR[h.level]" effect="dark" size="small" class="tag">{{ h.text }}</el-tag>
+      <span class="no readout">{{ rail }}</span>
+      <span :class="['led', h.level]" />
+      <span class="st" :style="{ color: loud ? LEVEL_COLOR[h.level] : 'var(--ink-2)' }">{{ h.text }}</span>
     </div>
+    <el-input v-model="label" size="small" class="label" placeholder="手机编号" @change="saveLabel" @click.stop />
 
     <div class="nums" v-if="r?.pr">
-      <div><b>{{ V(r.mv) }}</b><small> V</small><div class="muted">设定 {{ V(r.set) }}</div></div>
-      <div><b>{{ mA(r.ua) }}</b><small> mA</small><div class="muted">&nbsp;</div></div>
+      <div><b class="readout">{{ mA(r.ua) }}</b><small>mA</small></div>
+      <div><b class="readout">{{ V(r.mv) }}</b><small>V</small><div class="muted set">设定 {{ V(r.set) }}</div></div>
     </div>
     <div class="flags" v-if="r?.pr">
       <span :class="{ on: r.en }">直供{{ r.en ? '开' : '关' }}</span>
@@ -67,6 +70,7 @@ defineEmits(['select'])
 const r = computed(() => props.board?.status?.rails?.[props.rail - 1])
 const phone = computed(() => props.board?.phones?.find(p => p.rail === props.rail) || {})
 const h = computed(() => railHealth(props.board, r.value))
+const loud = computed(() => ['bad', 'warn', 'busy'].includes(h.value.level))
 // 在位、板子在线、执行器空闲才能下动作（忙的时候板子也会回 busy，这里只是少一次无用的往返）
 const can = computed(() => r.value?.pr && !props.board.stale && props.board.online && r.value.st === 'idle')
 
@@ -127,20 +131,23 @@ async function saveAuto(v) {
 </script>
 
 <style scoped>
-.rail { border-top: 4px solid; cursor: pointer; display: flex; flex-direction: column; gap: 10px; }
-.rail.sel { box-shadow: 0 0 0 2px #38bdf8; }
-.rh { display: flex; align-items: center; gap: 6px; }
-.no { font-weight: 700; font-size: 18px; width: 18px; }
-.label { flex: 1; min-width: 0; }
-.tag { border: none; flex-shrink: 0; }
-.nums { display: grid; grid-template-columns: 1fr 1fr; }
-.nums b { font-size: 22px; font-variant-numeric: tabular-nums; }
-.nums small { color: var(--muted); }
+.rail { cursor: pointer; display: flex; flex-direction: column; gap: 10px; padding: 14px; }
+.rail:hover { border-color: var(--muted); }
+.rail.sel { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
+.rail.empty { background: transparent; border-style: dashed; }
+.rh { display: flex; align-items: center; gap: 8px; }
+.no { font-weight: 700; font-size: 20px; color: var(--ink); min-width: 14px; }
+.st { font-size: 13px; font-weight: 600; }
+.label :deep(.el-input__wrapper) { box-shadow: none; background: var(--bay); }
+.nums { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
+.nums b { font-size: 26px; font-weight: 400; color: var(--ink); line-height: 1.1; }
+.nums small { color: var(--muted); font-size: 11px; margin-left: 3px; }
+.nums .set { font-size: 12px; }
 .flags { display: flex; gap: 6px; flex-wrap: wrap; }
-.flags span { font-size: 12px; padding: 1px 6px; border-radius: 4px; background: #f1f5f9; color: #94a3b8; }
-.flags span.on { background: #dcfce7; color: #166534; }
-.flags span.bad { background: #fee2e2; color: #b91c1c; }
+.flags span { font-size: 12px; padding: 0 6px; border-radius: 4px; border: 1px solid var(--line); color: var(--muted); }
+.flags span.on { color: var(--ink); border-color: var(--ink-2); }
+.flags span.bad { color: var(--st-bad); border-color: var(--st-bad); }
 .ar { display: flex; align-items: center; gap: 6px; }
-.acts { display: flex; gap: 6px; flex-wrap: wrap; }
+.acts { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
 .acts .el-button + .el-button { margin-left: 0; }
 </style>
diff --git a/rack/frontend/src/components/RangePicker.vue b/rack/frontend/src/components/RangePicker.vue
new file mode 100644
index 0000000..cb7ef33
--- /dev/null
+++ b/rack/frontend/src/components/RangePicker.vue
@@ -0,0 +1,15 @@
+<template>
+  <el-radio-group :model-value="modelValue" size="small" @update:model-value="v => $emit('update:modelValue', v)">
+    <el-radio-button v-for="o in RANGES" :key="o.v" :value="o.v">{{ o.t }}</el-radio-button>
+  </el-radio-group>
+</template>
+
+<script setup>
+// 曲线的时间范围。与后端的取数规则对应：6 小时以内回每秒原始数据，更长回分钟聚合（db.py）。
+defineProps({ modelValue: Number })
+defineEmits(['update:modelValue'])
+const RANGES = [
+  { v: 600e3, t: '10 分钟' }, { v: 3600e3, t: '1 小时' }, { v: 6 * 3600e3, t: '6 小时' },
+  { v: 86400e3, t: '1 天' }, { v: 7 * 86400e3, t: '7 天' },
+]
+</script>
diff --git a/rack/frontend/src/components/Spark.vue b/rack/frontend/src/components/Spark.vue
new file mode 100644
index 0000000..4fa497e
--- /dev/null
+++ b/rack/frontend/src/components/Spark.vue
@@ -0,0 +1,59 @@
+<template>
+  <svg class="spark" :viewBox="`0 0 ${W} ${H}`" preserveAspectRatio="none" role="img"
+       :aria-label="aria">
+    <polyline v-if="path" :points="path" fill="none" :stroke="color" stroke-width="1.5"
+              vector-effect="non-scaling-stroke" stroke-linejoin="round" />
+    <line v-else :x1="0" :x2="W" :y1="H - 1" :y2="H - 1" stroke="var(--line)" stroke-width="1"
+          vector-effect="non-scaling-stroke" />
+  </svg>
+</template>
+
+<script setup>
+// 一路最近两分钟的电流。**平线 = 疑似卡死**（自动恢复看的就是这个），所以纵轴不从 0 起，
+// 按这段数据自己的 min~max 撑满 —— 但给一个最小跨度（20 mA），否则噪声也会被放大成锯齿。
+import { computed, onMounted } from 'vue'
+import { api } from '../api'
+import { spark, sparkSeed, SPARK_MS } from '../store'
+
+const props = defineProps({ board: String, rail: Number, color: { type: String, default: 'var(--ink-2)' } })
+const W = 100
+const H = 28
+const key = computed(() => `${props.board}/${props.rail}`)
+const pts = computed(() => (spark[key.value] || []).filter(p => p[1] != null))
+
+const path = computed(() => {
+  const p = pts.value
+  if (p.length < 2) return ''
+  const t1 = p[p.length - 1][0]
+  const t0 = t1 - SPARK_MS
+  let lo = Infinity, hi = -Infinity
+  for (const [, v] of p) { lo = Math.min(lo, v); hi = Math.max(hi, v) }
+  const span = Math.max(hi - lo, 20000)
+  const mid = (hi + lo) / 2
+  return p.map(([t, v]) => {
+    const x = ((t - t0) / SPARK_MS) * W
+    const y = H - 2 - ((v - (mid - span / 2)) / span) * (H - 4)
+    return `${x.toFixed(1)},${y.toFixed(1)}`
+  }).join(' ')
+})
+
+const aria = computed(() => {
+  const p = pts.value
+  if (p.length < 2) return '最近两分钟电流：暂无数据'
+  const vs = p.map(x => x[1])
+  return `最近两分钟电流 ${Math.round(Math.min(...vs) / 1000)}~${Math.round(Math.max(...vs) / 1000)} mA`
+})
+
+onMounted(async () => {
+  if ((spark[key.value] || []).length > 10) return
+  try {
+    const end = Date.now()
+    const h = await api.history(props.board, props.rail, end - SPARK_MS, end)
+    sparkSeed(key.value, h.points.map(p => [p[0], p[2]]))
+  } catch { /* 拉不到就等遥测慢慢攒 */ }
+})
+</script>
+
+<style scoped>
+.spark { width: 100%; height: 28px; display: block; }
+</style>
diff --git a/rack/frontend/src/main.js b/rack/frontend/src/main.js
index b9472bb..3ecb336 100644
--- a/rack/frontend/src/main.js
+++ b/rack/frontend/src/main.js
@@ -3,6 +3,9 @@ import { createRouter, createWebHistory } from 'vue-router'
 import ElementPlus from 'element-plus'
 import zhCn from 'element-plus/es/locale/lang/zh-cn'
 import 'element-plus/dist/index.css'
+import 'element-plus/theme-chalk/dark/css-vars.css'
+import './theme.css'
+import './theme'
 
 import App from './App.vue'
 import Overview from './pages/Overview.vue'
diff --git a/rack/frontend/src/pages/Audit.vue b/rack/frontend/src/pages/Audit.vue
index f2738f3..cf8f1a0 100644
--- a/rack/frontend/src/pages/Audit.vue
+++ b/rack/frontend/src/pages/Audit.vue
@@ -33,6 +33,5 @@ onBeforeUnmount(off)
 
 <style scoped>
 .bar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
-.bad { color: #dc2626; }
 code { font-size: 12px; }
 </style>
diff --git a/rack/frontend/src/pages/Board.vue b/rack/frontend/src/pages/Board.vue
index 6ddf4c8..516f035 100644
--- a/rack/frontend/src/pages/Board.vue
+++ b/rack/frontend/src/pages/Board.vue
@@ -1,61 +1,67 @@
 <template>
-  <div v-if="!b" class="card"><el-empty description="没有这块板子（或者还没收到它的数据）" /></div>
+  <div v-if="!b" class="card"><el-empty description="没有这块板子，或者还没收到它的数据" /></div>
   <div v-else class="bd">
-    <div class="card head">
+    <section class="card head">
       <div class="names">
-        <el-input v-model="name" placeholder="板子名称" @change="saveMeta" />
-        <el-input v-model="location" placeholder="位置（如 机架 A 第 3 层）" @change="saveMeta" />
+        <span :class="['led', !b.online || b.stale ? 'lost' : 'ok']" />
+        <el-input v-model="name" class="ed name" placeholder="给这块板起个名字" @change="saveMeta" />
+        <el-input v-model="location" class="ed" placeholder="位置，比如 机架 A 第 3 层" @change="saveMeta" />
       </div>
-      <div class="info">
-        <el-tag v-if="!b.online || b.stale" type="info">通信中断 · 最后数据 {{ ago(b.last_tele) }}</el-tag>
-        <el-tag v-else type="success">在线</el-tag>
-        <span class="muted">ID {{ b.id }} · 固件 {{ b.status?.fw || b.fw }} · IP {{ b.ip }}</span>
-        <OtaState :status="b.status" />
-        <router-link to="/firmware" class="muted">推固件 →</router-link>
-      </div>
-      <div class="stats" v-if="b.status">
-        <div><span class="muted">输入</span><b>{{ V(b.status.in?.mv) }} V</b><b>{{ mA(b.status.in?.ua) }} mA</b></div>
-        <div><span class="muted">温度</span><b v-for="(t, i) in b.status.temp || []" :key="i">{{ t == null ? '—' : C(t) + ' °C' }}</b></div>
-        <div>
-          <span class="muted">风扇</span><b>{{ (b.status.fan?.duty ?? 0) / 10 }}%</b>
-          <b v-for="(r, i) in b.status.fan?.rpm || []" :key="i" :class="{ bad: b.status.fan?.stall?.[i] }">{{ r ?? '—' }} rpm</b>
-          <el-select v-model="fanFloor" size="small" style="width: 130px" @change="setFan">
+      <dl class="meta">
+        <div><dt>状态</dt><dd :class="{ bad: !b.online || b.stale }">{{ !b.online || b.stale ? `通信中断，最后数据 ${ago(b.last_tele)}` : '在线' }}</dd></div>
+        <div><dt>ID</dt><dd class="readout">{{ b.id }}</dd></div>
+        <div><dt>固件</dt><dd>{{ b.status?.fw || b.fw }} <OtaState :status="b.status" quiet /> <router-link to="/firmware">推固件</router-link></dd></div>
+        <div><dt>IP</dt><dd class="readout">{{ b.ip || '—' }}</dd></div>
+      </dl>
+      <div class="gauges" v-if="b.status">
+        <div class="g"><span class="gk">输入</span>
+          <span class="gv readout">{{ V(b.status.in?.mv) }}<small>V</small></span>
+          <span class="gv readout">{{ mA(b.status.in?.ua) }}<small>mA</small></span></div>
+        <div class="g"><span class="gk">温度</span>
+          <span v-for="(t, i) in b.status.temp || []" :key="i" class="gv readout">{{ t == null ? '—' : C(t) }}<small>°C</small></span></div>
+        <div class="g"><span class="gk">风扇</span>
+          <span class="gv readout">{{ (b.status.fan?.duty ?? 0) / 10 }}<small>%</small></span>
+          <span v-for="(r, i) in b.status.fan?.rpm || []" :key="i" class="gv readout" :class="{ bad: b.status.fan?.stall?.[i] }">{{ r ?? '—' }}<small>rpm</small></span>
+          <el-select v-model="fanFloor" size="small" class="floor" aria-label="风扇占空比下限" @change="setFan">
             <el-option :value="0" label="自动" />
             <el-option v-for="d in [500, 700, 850, 1000]" :key="d" :value="d" :label="`不低于 ${d / 10}%`" />
-          </el-select>
-        </div>
-        <div><span class="muted">巡检</span><b>{{ b.status.safety?.cycles }} 圈</b>
-          <b :class="{ bad: b.status.safety?.skipped }">跳过 {{ b.status.safety?.skipped }}</b>
-          <b :class="{ bad: b.status.safety?.i2c_err }">I²C 错 {{ b.status.safety?.i2c_err }}</b></div>
+          </el-select></div>
+        <div class="g"><span class="gk">巡检</span>
+          <span class="gv readout">{{ b.status.safety?.cycles }}<small>圈</small></span>
+          <span class="gv readout" :class="{ bad: b.status.safety?.skipped }">{{ b.status.safety?.skipped }}<small>跳过</small></span>
+          <span class="gv readout" :class="{ bad: b.status.safety?.i2c_err }">{{ b.status.safety?.i2c_err }}<small>I²C 错</small></span></div>
       </div>
-    </div>
+    </section>
 
     <div class="rails">
       <RailCard v-for="i in 5" :key="i" :board="b" :rail="i" :selected="sel === i"
                 :rec-state="recStates[i]" @select="sel = i" />
     </div>
 
-    <HistoryChart :board="b.id" :rail="sel" />
+    <div class="charts">
+      <HistoryChart :board="b.id" :rail="sel" />
+      <BoardChart :board="b.id" />
+    </div>
 
     <div class="two">
-      <div class="card">
-        <div class="ttl">最近事件</div>
-        <el-table :data="events" size="small" max-height="360" empty-text="暂无">
-          <el-table-column label="收到" width="130"><template #default="{ row }">{{ fmtTime(row.received) }}</template></el-table-column>
-          <el-table-column label="路" prop="rail" width="44" />
+      <section class="card">
+        <h2 class="ttl">最近事件</h2>
+        <el-table :data="events" size="small" max-height="360" empty-text="这块板还没有事件">
+          <el-table-column label="收到" width="130"><template #default="{ row }"><span class="readout">{{ fmtTime(row.received) }}</span></template></el-table-column>
+          <el-table-column label="路" width="50"><template #default="{ row }">{{ row.rail || '整板' }}</template></el-table-column>
           <el-table-column label="事件"><template #default="{ row }"><span :class="{ bad: row.severe }">{{ row.name }}</span></template></el-table-column>
-          <el-table-column label="当时" width="140"><template #default="{ row }">{{ V(row.mv) }} V / {{ mA(row.ua) }} mA</template></el-table-column>
+          <el-table-column label="当时" width="150"><template #default="{ row }"><span class="readout">{{ V(row.mv) }} V　{{ mA(row.ua) }} mA</span></template></el-table-column>
         </el-table>
-      </div>
-      <div class="card">
-        <div class="ttl">操作记录</div>
-        <el-table :data="audit" size="small" max-height="360" empty-text="暂无">
-          <el-table-column label="时间" width="130"><template #default="{ row }">{{ fmtTime(row.ts) }}</template></el-table-column>
+      </section>
+      <section class="card">
+        <h2 class="ttl">操作记录</h2>
+        <el-table :data="audit" size="small" max-height="360" empty-text="还没有人操作过这块板">
+          <el-table-column label="时间" width="130"><template #default="{ row }"><span class="readout">{{ fmtTime(row.ts) }}</span></template></el-table-column>
           <el-table-column label="谁" prop="user" width="110" />
-          <el-table-column label="操作"><template #default="{ row }">#{{ row.rail ?? '' }} {{ row.request.cmd }}{{ row.request.keys ? ' ' + row.request.keys : '' }}</template></el-table-column>
+          <el-table-column label="操作"><template #default="{ row }">{{ row.rail ? `#${row.rail} ` : '' }}{{ row.request.cmd }}{{ row.request.keys ? ' ' + row.request.keys : '' }}</template></el-table-column>
           <el-table-column label="结果" width="120"><template #default="{ row }"><span :class="{ bad: !row.ok }">{{ rspText(row.response) }}</span></template></el-table-column>
         </el-table>
-      </div>
+      </section>
     </div>
   </div>
 </template>
@@ -65,6 +71,7 @@ import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { ElMessage } from 'element-plus'
 import RailCard from '../components/RailCard.vue'
 import HistoryChart from '../components/HistoryChart.vue'
+import BoardChart from '../components/BoardChart.vue'
 import OtaState from '../components/OtaState.vue'
 import { api, rspText } from '../api'
 import { state, onMessage } from '../store'
@@ -119,17 +126,31 @@ watch(() => props.id, refresh)
 
 <style scoped>
 .bd { display: flex; flex-direction: column; gap: 16px; }
-.head { display: flex; flex-direction: column; gap: 10px; }
-.names { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
-.info { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
-.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 8px; }
-.stats > div { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
-.stats b { font-variant-numeric: tabular-nums; font-weight: 600; }
-.rails { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
-.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
-.ttl { font-weight: 600; margin-bottom: 8px; }
-.bad { color: #dc2626; }
-@media (max-width: 1200px) { .rails { grid-template-columns: repeat(3, 1fr); } }
+.head { display: flex; flex-direction: column; gap: 12px; }
+.names { display: grid; grid-template-columns: auto minmax(0, 1.2fr) minmax(0, 1fr); gap: 10px; align-items: center; }
+/* 就地编辑：平时像标题，点进去才像输入框 */
+.ed :deep(.el-input__wrapper) { box-shadow: none; background: transparent; padding-left: 4px; }
+.ed :deep(.el-input__wrapper:hover), .ed :deep(.el-input__wrapper.is-focus) { box-shadow: 0 0 0 1px var(--line) inset; background: var(--bay); }
+.name :deep(.el-input__inner) { font-size: 18px; font-weight: 700; color: var(--ink); }
+.meta { display: flex; flex-wrap: wrap; gap: 6px 28px; margin: 0; font-size: 13px; }
+.meta div { display: flex; gap: 8px; align-items: center; }
+.meta dt { color: var(--muted); }
+.meta dd { margin: 0; color: var(--ink-2); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
+.gauges { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 8px;
+  border-top: 1px solid var(--line-soft); padding-top: 12px; }
+.g { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
+.gk { color: var(--muted); font-size: 13px; width: 32px; flex-shrink: 0; }
+.gv { font-size: 20px; color: var(--ink); }
+.gv small { font-size: 11px; color: var(--muted); margin-left: 3px; font-family: var(--ui); }
+.floor { width: 130px; align-self: center; }
+.rails { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
+.charts { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
+.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
+@media (max-width: 1200px) { .rails { grid-template-columns: repeat(3, minmax(0, 1fr)); } .charts { grid-template-columns: 1fr; } }
 @media (max-width: 800px) { .rails { grid-template-columns: 1fr 1fr; } .two { grid-template-columns: 1fr; } }
-@media (max-width: 520px) { .rails { grid-template-columns: 1fr; } .names { grid-template-columns: 1fr; } }
+@media (max-width: 520px) {
+  .rails { grid-template-columns: 1fr; }
+  .names { grid-template-columns: auto 1fr; }
+  .names .ed:not(.name) { grid-column: 1 / -1; }
+}
 </style>
diff --git a/rack/frontend/src/pages/Events.vue b/rack/frontend/src/pages/Events.vue
index 3820b22..615ad43 100644
--- a/rack/frontend/src/pages/Events.vue
+++ b/rack/frontend/src/pages/Events.vue
@@ -50,5 +50,5 @@ onBeforeUnmount(off)
 <style scoped>
 .bar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
 .more { margin-top: 10px; text-align: center; }
-:deep(.sev) { color: #b91c1c; }
+:deep(.sev) { color: var(--st-bad); }
 </style>
diff --git a/rack/frontend/src/pages/Firmware.vue b/rack/frontend/src/pages/Firmware.vue
index 4a44c1d..85a6320 100644
--- a/rack/frontend/src/pages/Firmware.vue
+++ b/rack/frontend/src/pages/Firmware.vue
@@ -195,7 +195,6 @@ onBeforeUnmount(off)
 .fw .card { min-width: 0; overflow: hidden; }
 .ttl { font-weight: 600; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
 .hint { margin-bottom: 8px; }
-code { font-size: 12px; background: #f1f5f9; padding: 1px 4px; border-radius: 4px; word-break: break-all; }
 .boards { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; margin-bottom: 12px; }
 .boards .muted { margin-left: 6px; }
 .reboot { display: flex; align-items: center; gap: 8px; margin: 8px 0; }
diff --git a/rack/frontend/src/pages/Overview.vue b/rack/frontend/src/pages/Overview.vue
index e095940..2fe8189 100644
--- a/rack/frontend/src/pages/Overview.vue
+++ b/rack/frontend/src/pages/Overview.vue
@@ -1,53 +1,77 @@
 <template>
   <div class="ov">
-    <section class="boards">
-      <el-empty v-if="!boards.length" description="还没有板子上线。新板子经 USB 配好 wifi / mqtt 之后会自动出现在这里。" />
-      <router-link v-for="b in boards" :key="b.id" :to="`/board/${b.id}`" class="card board">
-        <div class="bh">
-          <div>
-            <div class="bname">{{ b.name || b.id }}</div>
-            <div class="muted">{{ b.location || '未填位置' }} · {{ b.fw }}</div>
-          </div>
-          <el-tag v-if="!b.online || b.stale" type="info" size="small">通信中断 · {{ ago(b.last_tele) }}</el-tag>
-          <el-tag v-else type="success" size="small">在线</el-tag>
-        </div>
-        <div class="slots">
-          <div v-for="i in 5" :key="i" class="slot" :style="{ borderColor: color(b, i) }">
-            <div class="sh">
-              <span class="sn">{{ i }}</span>
-              <span class="lbl">{{ phone(b, i).label }}</span>
-              <el-icon v-if="phone(b, i).auto_recover" title="已开自动恢复"><Refresh /></el-icon>
+    <div class="main">
+      <p class="summary" v-if="boards.length">
+        <template v-if="attention.length">
+          <span class="bad">{{ attention.length }} 路需要看：</span>
+          <router-link v-for="a in attention" :key="a.key" :to="`/board/${a.board}`" class="att">
+            {{ a.name }} #{{ a.rail }} {{ a.text }}
+          </router-link>
+        </template>
+        <template v-else>{{ tally }}</template>
+      </p>
+
+      <el-empty v-if="!boards.length" description="还没有板子上线。新板子经 USB 配好 WiFi 和 MQTT 之后会自动出现在这里。" />
+
+      <section class="boards">
+        <router-link v-for="b in boards" :key="b.id" :to="`/board/${b.id}`" class="card panel">
+          <header class="ph">
+            <div class="pn">
+              <span :class="['led', !b.online || b.stale ? 'lost' : 'ok']" />
+              <b>{{ b.name || b.id }}</b>
+              <span class="muted loc">{{ b.location || '没填位置' }}</span>
+            </div>
+            <span v-if="!b.online || b.stale" class="muted">通信中断，最后数据 {{ ago(b.last_tele) }}</span>
+            <span v-else class="muted fw">{{ b.status?.fw || b.fw }}</span>
+          </header>
+
+          <div class="bays">
+            <div v-for="i in 5" :key="i" :class="['bay', health(b, i).level]">
+              <div class="bt">
+                <span class="bn readout">{{ i }}</span>
+                <span :class="['led', health(b, i).level]" />
+                <el-icon v-if="phone(b, i).auto_recover" class="ar" title="已开自动恢复"><Refresh /></el-icon>
+              </div>
+              <div class="bl" :title="phone(b, i).label">{{ phone(b, i).label || '　' }}</div>
+              <template v-if="rail(b, i)?.pr">
+                <div class="bv readout">{{ mA(rail(b, i)?.ua) }}<small>mA</small></div>
+                <Spark :board="b.id" :rail="i" :color="loud(b, i) ? LEVEL_COLOR[health(b, i).level] : 'var(--ink-2)'" />
+              </template>
+              <div class="bs" :style="{ color: loud(b, i) ? LEVEL_COLOR[health(b, i).level] : 'var(--muted)' }">{{ health(b, i).text }}</div>
             </div>
-            <div class="val" :style="{ color: color(b, i) }">{{ health(b, i).text }}</div>
-            <div class="num" v-if="rail(b, i)?.pr">{{ mA(rail(b, i)?.ua) }}<small> mA</small></div>
           </div>
-        </div>
-        <div class="bf muted" v-if="b.status">
-          输入 {{ V(b.status.in?.mv) }} V / {{ mA(b.status.in?.ua) }} mA ·
-          温度 {{ temps(b) }} ·
-          风扇 {{ b.status.fan?.duty / 10 }}%
-          <span v-if="b.status.fan?.stall?.some(x => x)" class="bad"> · 风扇停转</span>
-          <span v-if="b.status.derate" class="bad"> · 过温</span>
-        </div>
-      </router-link>
-    </section>
+
+          <footer class="pf" v-if="b.status">
+            <div><span class="k">输入</span><span class="readout">{{ V(b.status.in?.mv) }}</span> V
+              <span class="readout">{{ A(b.status.in?.ua) }}</span> A</div>
+            <div><span class="k">温度</span>
+              <span v-for="(t, k) in b.status.temp || []" :key="k" class="readout t">{{ t == null ? '—' : C(t) }}</span> °C</div>
+            <div><span class="k">风扇</span><span class="readout">{{ (b.status.fan?.duty ?? 0) / 10 }}</span> %
+              <span v-if="b.status.fan?.stall?.some(x => x)" class="bad">停转</span></div>
+            <div v-if="b.status.derate" class="bad">过温降载</div>
+          </footer>
+        </router-link>
+      </section>
+    </div>
 
     <aside class="card feed">
-      <div class="fh">实时动态</div>
-      <div v-if="!state.feed.length" class="muted">暂无。事件、操作、自动恢复都会出现在这里。</div>
-      <div v-for="(f, k) in state.feed" :key="k" class="fi">
-        <span class="muted">{{ fmtTime(f.ts) }}</span>
-        <span class="who">{{ boardName(f.board) }}</span>
-        <template v-if="f.kind === 'event'">
-          <span :class="{ bad: SEVERE.has(f.ev[3]) }">{{ f.ev[2] ? `#${f.ev[2]} ` : '' }}{{ evName(f.ev[3]) }}</span>
-        </template>
-        <template v-else-if="f.kind === 'audit'">
-          <span>{{ f.row.user }}：#{{ f.row.rail ?? '' }} {{ f.row.request.cmd }} → {{ rspText(f.row.response) }}</span>
-        </template>
-        <template v-else>
-          <span class="warn">自动恢复 #{{ f.row.rail }}：{{ RECOVERY_ZH[f.row.state] }}（{{ REASON_ZH[f.row.reason] || f.row.reason }}）</span>
-        </template>
-      </div>
+      <h2 class="ttl">实时动态</h2>
+      <div v-if="!state.feed.length" class="muted">事件、操作和自动恢复会实时出现在这里。</div>
+      <ol class="fl">
+        <li v-for="(f, k) in state.feed" :key="k">
+          <time class="muted readout">{{ fmtTime(f.ts) }}</time>
+          <span class="who">{{ boardName(f.board) }}</span>
+          <template v-if="f.kind === 'event'">
+            <span :class="{ bad: SEVERE.has(f.ev[3]) }">{{ f.ev[2] ? `#${f.ev[2]} ` : '' }}{{ evName(f.ev[3]) }}</span>
+          </template>
+          <template v-else-if="f.kind === 'audit'">
+            <span>{{ f.row.user }} 对 #{{ f.row.rail ?? '' }} 执行 {{ f.row.request.cmd }}：{{ rspText(f.row.response) }}</span>
+          </template>
+          <template v-else>
+            <span class="warn">自动恢复 #{{ f.row.rail }}：{{ RECOVERY_ZH[f.row.state] }}（{{ REASON_ZH[f.row.reason] || f.row.reason }}）</span>
+          </template>
+        </li>
+      </ol>
     </aside>
   </div>
 </template>
@@ -55,57 +79,102 @@
 <script setup>
 import { computed } from 'vue'
 import { Refresh } from '@element-plus/icons-vue'
+import Spark from '../components/Spark.vue'
 import { state } from '../store'
 import { rspText } from '../api'
 import { mA, V, C, ago, fmtTime, railHealth, LEVEL_COLOR, RECOVERY_ZH, REASON_ZH } from '../util'
 
 // 与 backend/prrack/protocol.py 的 EVENT_TYPES / EVENT_SEVERE 同一张表（数字来自固件 evlog.h）
 const EV = ['', '板子上电', '事件丢失', '过压关路', '欠压关路', '反灌断 VBUS', '顶高断 VBUS', 'eFuse 故障',
-  'PG 变化', 'I²C 失联', '过温降载', '风扇停转', '重启序列', '命令被拒', 'mux 失联全断', '刀片不在位', 'PD 限功率']
-const SEVERE = new Set([3, 4, 5, 6, 7, 9, 11, 14])
+  'PG 变化', 'I²C 失联', '过温降载', '风扇停转', '重启序列', '命令被拒', 'mux 失联全断', '刀片不在位', 'PD 限功率',
+  '上电等不到 PG', '固件升级']
+const SEVERE = new Set([3, 4, 5, 6, 7, 9, 11, 14, 17])
 const evName = t => EV[t] || `事件 ${t}`
 
+const A = ua => (ua == null ? '—' : (ua / 1e6).toFixed(2))
 const boards = computed(() => Object.values(state.boards).sort((a, b) =>
   (a.location + a.name + a.id).localeCompare(b.location + b.name + b.id)))
 const rail = (b, i) => b.status?.rails?.[i - 1]
 const phone = (b, i) => b.phones?.find(p => p.rail === i) || {}
 const health = (b, i) => railHealth(b, rail(b, i))
-const color = (b, i) => LEVEL_COLOR[health(b, i).level]
-const temps = b => (b.status.temp || []).map(t => (t == null ? '—' : C(t) + '°')).join(' / ')
 const boardName = id => state.boards[id]?.name || id
+// 只有要人看的状态（异常 / 故障 / 正在执行）才上色；「运行」「断电」「空槽」安静 —— 灯已经说了
+const loud = (b, i) => ['bad', 'warn', 'busy'].includes(health(b, i).level)
+
+// 需要人看的：异常 / 故障 / 读不到。断电、空槽、通信中断是「状态」，不是「告警」，只进计数。
+const attention = computed(() => {
+  const out = []
+  for (const b of boards.value) {
+    for (let i = 1; i <= 5; i++) {
+      const h = health(b, i)
+      if (h.level === 'bad' || h.level === 'warn') {
+        out.push({ key: `${b.id}/${i}`, board: b.id, name: b.name || b.id, rail: i, text: h.text })
+      }
+    }
+  }
+  return out
+})
+const tally = computed(() => {
+  const n = { ok: 0, busy: 0, off: 0, empty: 0, lost: 0 }
+  for (const b of boards.value) for (let i = 1; i <= 5; i++) n[health(b, i).level] = (n[health(b, i).level] || 0) + 1
+  const parts = [`${n.ok} 台在跑`]
+  if (n.busy) parts.push(`${n.busy} 台正在执行动作`)
+  if (n.off) parts.push(`${n.off} 台断电`)
+  if (n.empty) parts.push(`${n.empty} 个空槽`)
+  if (n.lost) parts.push(`${n.lost} 路通信中断`)
+  return parts.join('，') + '。'
+})
 </script>
 
 <style scoped>
-.ov { display: grid; grid-template-columns: 1fr 320px; gap: 16px; align-items: start; }
-.boards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(420px, 100%), 1fr)); gap: 16px; }
-.board { display: block; color: inherit; text-decoration: none; transition: box-shadow .15s; }
-.board:hover { box-shadow: 0 4px 16px rgba(15, 23, 42, .08); }
-.bh { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
-.bname { font-weight: 600; font-size: 16px; }
-.slots { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
-.slot { border: 2px solid; border-radius: 8px; padding: 8px 6px; min-height: 86px; }
-.sh { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--muted); }
-.sn { font-weight: 700; color: #0f172a; }
-.lbl { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
-.val { font-size: 13px; font-weight: 600; margin-top: 6px; }
-.num { font-size: 18px; font-weight: 600; margin-top: 2px; font-variant-numeric: tabular-nums; }
-.num small { font-size: 11px; color: var(--muted); font-weight: 400; }
-.bf { margin-top: 10px; }
-.bad { color: #dc2626; } .warn { color: #d97706; }
-.feed { position: sticky; top: 68px; max-height: calc(100vh - 90px); overflow: auto; }
-.fh { font-weight: 600; margin-bottom: 8px; }
-.fi { font-size: 13px; padding: 6px 0; border-bottom: 1px dashed var(--line); display: flex; gap: 6px; flex-wrap: wrap; }
-.who { color: #334155; font-weight: 500; }
-@media (max-width: 1000px) {
+.ov { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 20px; align-items: start; }
+.summary { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; display: flex; flex-wrap: wrap; gap: 4px 10px; }
+.att { color: var(--st-bad); text-decoration: underline; text-underline-offset: 3px; }
+.boards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(460px, 100%), 1fr)); gap: 16px; }
+
+.panel { display: flex; flex-direction: column; gap: 12px; color: inherit; text-decoration: none; padding: 14px; }
+.panel:hover { border-color: var(--muted); }
+.ph { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
+.pn { display: flex; align-items: center; gap: 8px; min-width: 0; }
+.pn b { font-size: 16px; }
+.loc { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.fw { white-space: nowrap; }
+
+/* 刀片槽：凹进去的一格，顶上一条状态色的「灯条」 */
+.bays { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; }
+.bay { background: var(--bay); border: 1px solid var(--bay-edge); border-radius: var(--r-bay);
+  padding: 8px 8px 6px; display: flex; flex-direction: column; gap: 2px; min-height: 118px;
+  box-shadow: inset 0 1px 2px rgba(0, 0, 0, .06); }
+.bay.empty { background: transparent; border-style: dashed; box-shadow: none; }
+.bt { display: flex; align-items: center; gap: 6px; }
+.bn { font-size: 15px; font-weight: 700; color: var(--ink-2); }
+.ar { margin-left: auto; color: var(--muted); font-size: 13px; }
+.bl { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.bv { font-size: 24px; line-height: 1.1; color: var(--ink); margin-top: 2px; }
+.bv small { font-size: 11px; color: var(--muted); margin-left: 2px; font-family: var(--ui); }
+.bs { font-size: 12px; font-weight: 600; margin-top: auto; }
+.bay.off .bv, .bay.lost .bv { color: var(--muted); }
+
+.pf { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13px; color: var(--ink-2);
+  border-top: 1px solid var(--line-soft); padding-top: 10px; }
+.pf .k { color: var(--muted); margin-right: 6px; }
+.pf .readout { font-size: 15px; color: var(--ink); }
+.pf .t + .t::before { content: '/'; margin: 0 4px; color: var(--muted); }
+
+.feed { position: sticky; top: 74px; max-height: calc(100vh - 94px); overflow: auto; }
+.fl { list-style: none; margin: 0; padding: 0; }
+.fl li { font-size: 13px; padding: 7px 0; border-bottom: 1px solid var(--line-soft); display: flex; gap: 6px; flex-wrap: wrap; }
+.fl time { font-size: 12px; }
+.who { color: var(--ink); font-weight: 500; }
+@media (max-width: 1100px) {
   .ov { grid-template-columns: 1fr; }
   .feed { position: static; max-height: 360px; }
 }
-@media (max-width: 520px) {
-  .boards { grid-template-columns: 1fr; }
-  .slots { gap: 4px; }
-  .slot { padding: 5px 3px; min-height: 72px; }
-  .val { font-size: 12px; }
-  .num { font-size: 14px; }
-  .num small { display: none; }
+@media (max-width: 560px) {
+  .bays { gap: 4px; }
+  .bay { padding: 6px 5px 5px; min-height: 104px; }
+  .bv { font-size: 18px; }
+  .bv small { display: none; }
+  .bl { display: none; }
 }
 </style>
diff --git a/rack/frontend/src/pages/Recovery.vue b/rack/frontend/src/pages/Recovery.vue
index 224de67..5eab07a 100644
--- a/rack/frontend/src/pages/Recovery.vue
+++ b/rack/frontend/src/pages/Recovery.vue
@@ -80,5 +80,4 @@ onBeforeUnmount(off)
 .rc { display: flex; flex-direction: column; gap: 16px; }
 .ttl { font-weight: 600; margin-bottom: 10px; }
 .form { max-width: 560px; }
-.bad { color: #dc2626; }
 </style>
diff --git a/rack/frontend/src/store.js b/rack/frontend/src/store.js
index 7d7d972..44791c3 100644
--- a/rack/frontend/src/store.js
+++ b/rack/frontend/src/store.js
@@ -1,6 +1,6 @@
 // 全站唯一的实时状态：WebSocket 推什么，这里就改什么；页面只读它。
 // 断线自动重连（指数退避到 15 s）；重连后服务器会先发一条 hello 带全量，不用补拉。
-import { reactive } from 'vue'
+import { reactive, shallowReactive } from 'vue'
 
 export const state = reactive({
   boards: {},        // id → 快照（含 status / phones）
@@ -11,6 +11,24 @@ export const state = reactive({
   feed: [],          // 最近的事件 / 审计 / 恢复，给总览页右侧的动态流
 })
 
+// 每路最近 SPARK_MS 的电流（总览的小曲线）：key = `${board}/${rail}` → [[ts, ua], ...]。
+// shallowReactive：换整个数组才触发重画，push 不触发 —— 25 条 × 120 点，每秒不该有 3000 次响应式通知。
+export const SPARK_MS = 120000
+export const spark = shallowReactive({})
+export function sparkSeed(key, pts) {
+  if (!spark[key] || spark[key].length < pts.length) spark[key] = pts
+}
+function sparkPush(board, ts, rails) {
+  for (const r of rails || []) {
+    const key = `${board}/${r.r}`
+    const old = spark[key] || []
+    const cut = ts - SPARK_MS
+    let i = 0
+    while (i < old.length && old[i][0] < cut) i++
+    spark[key] = old.slice(i).concat([[ts, r.ua]])
+  }
+}
+
 const listeners = new Set()
 export function onMessage(fn) { listeners.add(fn); return () => listeners.delete(fn) }
 
@@ -36,6 +54,7 @@ function handle(m) {
     case 'tele': {
       const b = state.boards[m.board]
       if (b) { b.status = m.status; b.last_tele = m.ts; b.stale = false; b.online = true }
+      sparkPush(m.board, m.ts, m.status.rails)
       break
     }
     case 'events':
diff --git a/rack/frontend/src/theme.css b/rack/frontend/src/theme.css
new file mode 100644
index 0000000..b38b916
--- /dev/null
+++ b/rack/frontend/src/theme.css
@@ -0,0 +1,132 @@
+/* PhoneRail 机架 —— 仪器前面板风格。
+   一处用力：每块板是一块「面板」，五个槽是凹进去的「刀片槽」，槽里是状态灯 + 读数 + 电流小曲线。
+   其余一律安静：冷灰阳极铝底、细线分隔、读数用 DIN 系等宽数字。
+   颜色只有两类职责：
+     · 状态（运行 / 忙 / 异常 / 故障 / 断电 / 空槽 / 失联）—— 只用来表示状态，旁边一定有文字；
+     · 交互（选中、链接、主按钮）—— 阳极蓝。
+   图表的系列色在 chart.js 里（dataviz 参考调色板第 1/2 槽，按本页底色校验过）。 */
+
+:root {
+  color-scheme: light;
+  --plane: #eceff2;        /* 页面底 */
+  --panel: #fbfcfd;        /* 面板 */
+  --bay: #f2f4f7;          /* 凹槽（比面板深一档） */
+  --bay-edge: #dde2e8;
+  --ink: #16202b;
+  --ink-2: #566270;
+  --muted: #8a94a0;
+  --line: #d9dee4;
+  --line-soft: #e8ecf0;
+  --accent: #1d5fd1;
+  --accent-soft: #e3ecfb;
+  --bar: #fbfcfd;
+
+  --st-ok: #0c8a0c;        /* 运行（比 dataviz 的 good 深一档：它要当文字用） */
+  --st-busy: #1d5fd1;
+  --st-warn: #b07a00;
+  --st-bad: #c62f2f;
+  --st-off: #5d6875;
+  --st-empty: #b9c1ca;
+  --st-lost: #98a1ab;
+  --led-ok: #16b416;       /* 灯本身：亮一点，但只当圆点用，不当文字 */
+  --led-warn: #fab219;
+  --led-bad: #e04343;
+
+  --readout: "DIN Alternate", "DIN 2014", Bahnschrift, "Roboto Condensed", "Arial Narrow", system-ui, sans-serif;
+  --ui: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei",
+    "Noto Sans CJK SC", system-ui, sans-serif;
+
+  --r-panel: 10px;
+  --r-bay: 6px;
+
+  /* Element Plus：主色换成阳极蓝，其余跟着面板走 */
+  --el-color-primary: #1d5fd1;
+  --el-color-primary-light-3: #6190e0;
+  --el-color-primary-light-5: #8eafe8;
+  --el-color-primary-light-7: #bbcff1;
+  --el-color-primary-light-8: #d2dff6;
+  --el-color-primary-light-9: #e8effb;
+  --el-color-primary-dark-2: #184ca7;
+  --el-font-family: var(--ui);
+  --el-border-radius-base: 6px;
+}
+
+html.dark {
+  color-scheme: dark;
+  --plane: #0f1216;
+  --panel: #171b21;
+  --bay: #12161b;
+  --bay-edge: #262c34;
+  --ink: #e8ecf1;
+  --ink-2: #a7b0bb;
+  --muted: #76808b;
+  --line: #2a3038;
+  --line-soft: #20252c;
+  --accent: #5b95f2;
+  --accent-soft: #1b2a44;
+  --bar: #13171c;
+
+  --st-ok: #3cc43c;
+  --st-busy: #5b95f2;
+  --st-warn: #f0b23a;
+  --st-bad: #ef6464;
+  --st-off: #8a95a1;
+  --st-empty: #3a414a;
+  --st-lost: #5d6671;
+  --led-ok: #2fd12f;
+  --led-warn: #fab219;
+  --led-bad: #ef5353;
+
+  --el-color-primary: #5b95f2;
+  --el-color-primary-light-3: #3f6fb8;
+  --el-color-primary-light-5: #2f548b;
+  --el-color-primary-light-7: #203a5f;
+  --el-color-primary-light-8: #1a2f4c;
+  --el-color-primary-light-9: #142338;
+  --el-color-primary-dark-2: #7eabf5;
+  --el-bg-color: #171b21;
+  --el-bg-color-overlay: #1c2128;
+  --el-fill-color-blank: #171b21;
+  --el-border-color: #2f363f;
+  --el-border-color-light: #2a3038;
+  --el-border-color-lighter: #242a31;
+}
+
+* { box-sizing: border-box; }
+html, body { background: var(--plane); }
+body { margin: 0; font-family: var(--ui); color: var(--ink); font-size: 14px; line-height: 1.5;
+  -webkit-font-smoothing: antialiased; }
+a { color: var(--accent); }
+:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
+
+/* 面板：页面上的一级容器 */
+.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-panel); padding: 16px; }
+.muted { color: var(--muted); font-size: 13px; }
+.readout { font-family: var(--readout); font-variant-numeric: tabular-nums; letter-spacing: .01em; }
+.bad { color: var(--st-bad); }
+.warn { color: var(--st-warn); }
+
+/* 面板标题：粗一点的正文字，不加眉标、不全大写 */
+.ttl { font-weight: 600; font-size: 15px; margin: 0 0 10px; color: var(--ink); }
+
+/* 状态灯 */
+.led { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0;
+  background: var(--st-empty); box-shadow: 0 0 0 2px var(--panel); }
+.led.ok { background: var(--led-ok); }
+.led.busy { background: var(--st-busy); }
+.led.warn { background: var(--led-warn); }
+.led.bad { background: var(--led-bad); }
+.led.off { background: var(--st-off); }
+.led.lost { background: var(--st-lost); }
+@media (prefers-reduced-motion: no-preference) {
+  .led.busy { animation: led-blink 1s steps(2, jump-none) infinite; }
+}
+@keyframes led-blink { 50% { opacity: .35; } }
+
+/* 表格：去掉 Element Plus 的斑马感，行线用细线 */
+.el-table { --el-table-border-color: var(--line-soft); --el-table-header-bg-color: transparent;
+  --el-table-tr-bg-color: transparent; --el-table-bg-color: transparent; --el-table-row-hover-bg-color: var(--bay);
+  --el-table-text-color: var(--ink); --el-table-header-text-color: var(--muted); }
+.el-table th.el-table__cell { font-weight: 500; }
+code { font-size: 12px; background: var(--bay); border: 1px solid var(--line-soft); padding: 0 4px; border-radius: 4px;
+  word-break: break-all; }
diff --git a/rack/frontend/src/theme.js b/rack/frontend/src/theme.js
new file mode 100644
index 0000000..c394b23
--- /dev/null
+++ b/rack/frontend/src/theme.js
@@ -0,0 +1,18 @@
+// 亮 / 暗：跟随系统（运维夜里看手机多）。切换时在 <html> 上挂 `dark`（Element Plus 暗色变量也认这个类），
+// 并通知图表重画 —— ECharts 画在 canvas 上，CSS 变量变了它不知道。
+import { ref } from 'vue'
+
+const mq = window.matchMedia('(prefers-color-scheme: dark)')
+export const dark = ref(mq.matches)
+
+function apply() {
+  dark.value = mq.matches
+  document.documentElement.classList.toggle('dark', dark.value)
+}
+apply()
+mq.addEventListener('change', apply)
+
+// 读一个 CSS 变量的当前值（图表取色用）
+export function cssVar(name) {
+  return getComputedStyle(document.documentElement).getPropertyValue(name).trim()
+}
diff --git a/rack/frontend/src/util.js b/rack/frontend/src/util.js
index 6ef2594..bccdc21 100644
--- a/rack/frontend/src/util.js
+++ b/rack/frontend/src/util.js
@@ -40,9 +40,10 @@ export function railHealth(board, r) {
   return { level: 'ok', text: '运行' }
 }
 
+// 状态色引用 theme.css 的变量：亮 / 暗两套，切换时自动跟着变。只用来表示状态，旁边一定有文字。
 export const LEVEL_COLOR = {
-  ok: '#16a34a', busy: '#2563eb', warn: '#d97706', bad: '#dc2626',
-  off: '#475569', empty: '#cbd5e1', lost: '#94a3b8',
+  ok: 'var(--st-ok)', busy: 'var(--st-busy)', warn: 'var(--st-warn)', bad: 'var(--st-bad)',
+  off: 'var(--st-off)', empty: 'var(--st-empty)', lost: 'var(--st-lost)',
 }
 
 export const RECOVERY_ZH = {