Fix pace sentinel, route map thumbnails, tiled segments, health/dashboard layout

- Pace: FIT 0xFFFF sentinel (65.535 m/s) was stored as avg_speed_ms on every
  activity and lap; add _sanitize_speed() to parser falling back to dist/dur,
  plus a startup SQL migration that fixed 120 activities and 688 laps in-place
- Records: remove swimming from Distance PRs; Route Records rows are clickable
  (navigate to activity), View button removed, small SVG route map per row;
  Segment Records uses same tiled route-card layout as Segments page
- Segments: replace route dropdown with responsive tile grid showing SVG map
  thumbnails; selecting a tile reveals the segment management panel below
- RouteMiniMap: new pure-SVG component (no Leaflet) for route thumbnails,
  decodes polyline and normalises coords into a fixed viewBox
- Health: rename "Avg Heart Rate (day)" → "Heart Rate"; weight chart now
  filters to non-null rows and enables connectNulls + dots for sparse data
- Dashboard: 4-col layout at lg breakpoint so Body Battery sits between weekly
  chart and Health Today; Body Battery card gains a 24-hr sparkline from the
  values[] already present in the health summary response

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/ui/RouteMiniMap.jsx

@@ -0,0 +1,68 @@
+import { useMemo } from 'react'
+import { sportColor } from '../../utils/format'
+
+function decodePolyline(encoded) {
+  const coords = []
+  let index = 0, lat = 0, lng = 0
+  while (index < encoded.length) {
+    let b, shift = 0, result = 0
+    do { b = encoded.charCodeAt(index++) - 63; result |= (b & 0x1f) << shift; shift += 5 } while (b >= 0x20)
+    lat += (result & 1) ? ~(result >> 1) : result >> 1
+    shift = 0; result = 0
+    do { b = encoded.charCodeAt(index++) - 63; result |= (b & 0x1f) << shift; shift += 5 } while (b >= 0x20)
+    lng += (result & 1) ? ~(result >> 1) : result >> 1
+    coords.push([lat / 1e5, lng / 1e5])
+  }
+  return coords
+}
+
+// Internal viewBox dimensions — path is always drawn into this space, SVG scales it
+const VW = 100
+const VH = 80
+const PAD = 6
+
+export default function RouteMiniMap({ polyline, sportType, width = 80, height = 60 }) {
+  const pathD = useMemo(() => {
+    if (!polyline) return null
+    const coords = decodePolyline(polyline)
+    if (coords.length < 2) return null
+
+    const lats = coords.map(c => c[0])
+    const lngs = coords.map(c => c[1])
+    const minLat = Math.min(...lats), maxLat = Math.max(...lats)
+    const minLng = Math.min(...lngs), maxLng = Math.max(...lngs)
+    const latRange = maxLat - minLat || 0.001
+    const lngRange = maxLng - minLng || 0.001
+
+    const drawW = VW - PAD * 2
+    const drawH = VH - PAD * 2
+    const scale = Math.min(drawW / lngRange, drawH / latRange)
+    const offX = PAD + (drawW - lngRange * scale) / 2
+    const offY = PAD + (drawH - latRange * scale) / 2
+
+    return coords.map((c, i) => {
+      const x = offX + (c[1] - minLng) * scale
+      const y = offY + (maxLat - c[0]) * scale
+      return `${i === 0 ? 'M' : 'L'}${x.toFixed(1)},${y.toFixed(1)}`
+    }).join(' ')
+  }, [polyline])
+
+  const svgProps = {
+    viewBox: `0 0 ${VW} ${VH}`,
+    preserveAspectRatio: 'xMidYMid meet',
+    className: 'rounded overflow-hidden block',
+    style: { background: '#111827', width, height },
+  }
+
+  if (!pathD) return (
+    <svg {...svgProps}>
+      <text x={VW / 2} y={VH / 2} textAnchor="middle" dominantBaseline="middle" fill="#374151" fontSize="10">—</text>
+    </svg>
+  )
+
+  return (
+    <svg {...svgProps}>
+      <path d={pathD} fill="none" stroke={sportColor(sportType)} strokeWidth="2" strokeLinejoin="round" strokeLinecap="round" />
+    </svg>
+  )
+}

frontend/src/pages/DashboardPage.jsx

@@ -1,6 +1,6 @@
 import { Link, useNavigate } from 'react-router-dom'
 import { useQuery } from '@tanstack/react-query'
-import { BarChart, Bar, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts'
+import { BarChart, Bar, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, AreaChart, Area } from 'recharts'
 import { startOfWeek, format, subWeeks, eachWeekOfInterval, subDays, addDays } from 'date-fns'
 import api from '../utils/api'
 import StatCard from '../components/ui/StatCard'
@@ -19,10 +19,13 @@ function bbLevelColor(level) {
 
 function MiniBodyBattery({ bb }) {
   if (!bb?.end_level && !bb?.charged) return null
-  const { charged, drained, start_level, end_level } = bb
+  const { charged, drained, start_level, end_level, values } = bb
   const color = bbLevelColor(end_level)
+  const sparkData = Array.isArray(values)
+    ? values.map(([ts, level]) => ({ ts, level }))
+    : []
   return (
-    <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
+    <div className="bg-gray-900 rounded-xl border border-gray-800 p-4 h-full">
       <div className="flex items-center justify-between mb-2">
         <h3 className="text-sm font-medium text-gray-300">Body Battery</h3>
         <Link to="/health" className="text-xs text-blue-400 hover:underline">View →</Link>
@@ -41,6 +44,27 @@ function MiniBodyBattery({ bb }) {
       {start_level != null && end_level != null && (
         <p className="text-xs text-gray-500 mt-1">{start_level} → {end_level} today</p>
       )}
+      {sparkData.length >= 2 && (
+        <div className="mt-3">
+          <ResponsiveContainer width="100%" height={60}>
+            <AreaChart data={sparkData} margin={{ top: 2, right: 0, bottom: 0, left: 0 }}>
+              <defs>
+                <linearGradient id="bbGrad" x1="0" y1="0" x2="0" y2="1">
+                  <stop offset="5%" stopColor={color} stopOpacity={0.3} />
+                  <stop offset="95%" stopColor={color} stopOpacity={0} />
+                </linearGradient>
+              </defs>
+              <Area type="monotone" dataKey="level" stroke={color} strokeWidth={1.5}
+                fill="url(#bbGrad)" dot={false} isAnimationActive={false} />
+              <Tooltip
+                contentStyle={{ background: '#111827', border: '1px solid #374151', borderRadius: 6, fontSize: 11 }}
+                labelFormatter={ts => format(new Date(ts), 'HH:mm')}
+                formatter={v => [`${Math.round(v)}`, 'Battery']}
+              />
+            </AreaChart>
+          </ResponsiveContainer>
+        </div>
+      )}
     </div>
   )
 }
@@ -145,36 +169,37 @@ export default function DashboardPage() {
         <StatCard label="Sleep" value={formatSleep(latest?.sleep_duration_s)} />
       </div>
 
-      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
+      <div className="grid grid-cols-1 lg:grid-cols-4 gap-6">
         <div className="lg:col-span-2 bg-gray-900 rounded-xl border border-gray-800 p-4">
           <h3 className="text-sm font-medium text-gray-300 mb-3">Weekly distance (km)</h3>
           <WeeklyChart activities={allActivities} />
         </div>
 
-        <div className="flex flex-col gap-4">
+        <div className="lg:col-span-1">
           <MiniBodyBattery bb={latest?.body_battery} />
-          <div className="bg-gray-900 rounded-xl border border-gray-800 p-4 space-y-3">
-            <h3 className="text-sm font-medium text-gray-300">Health today</h3>
-            {latest ? (
-              <>
-                {[
-                  ['HRV', latest.hrv_nightly_avg ? `${Math.round(latest.hrv_nightly_avg)} ms` : '--'],
-                  ['Sleep score', latest.sleep_score ? Math.round(latest.sleep_score) : '--'],
-                  ['Steps', latest.steps?.toLocaleString() ?? '--'],
-                  ['VO2 Max', latest.vo2max ? latest.vo2max.toFixed(1) : '--'],
-                  ['Stress', latest.avg_stress ? Math.round(latest.avg_stress) : '--'],
-                ].map(([label, val]) => (
-                  <div key={label} className="flex justify-between text-sm">
-                    <span className="text-gray-500">{label}</span>
-                    <span className="text-white">{val}</span>
-                  </div>
-                ))}
-                <Link to="/health" className="block text-xs text-blue-400 hover:underline mt-2">View full health dashboard →</Link>
-              </>
-            ) : (
-              <p className="text-xs text-gray-600">No health data. Import a Garmin export.</p>
-            )}
-          </div>
+        </div>
+
+        <div className="lg:col-span-1 bg-gray-900 rounded-xl border border-gray-800 p-4 space-y-3">
+          <h3 className="text-sm font-medium text-gray-300">Health today</h3>
+          {latest ? (
+            <>
+              {[
+                ['HRV', latest.hrv_nightly_avg ? `${Math.round(latest.hrv_nightly_avg)} ms` : '--'],
+                ['Sleep score', latest.sleep_score ? Math.round(latest.sleep_score) : '--'],
+                ['Steps', latest.steps?.toLocaleString() ?? '--'],
+                ['VO2 Max', latest.vo2max ? latest.vo2max.toFixed(1) : '--'],
+                ['Stress', latest.avg_stress ? Math.round(latest.avg_stress) : '--'],
+              ].map(([label, val]) => (
+                <div key={label} className="flex justify-between text-sm">
+                  <span className="text-gray-500">{label}</span>
+                  <span className="text-white">{val}</span>
+                </div>
+              ))}
+              <Link to="/health" className="block text-xs text-blue-400 hover:underline mt-2">View full health dashboard →</Link>
+            </>
+          ) : (
+            <p className="text-xs text-gray-600">No health data. Import a Garmin export.</p>
+          )}
         </div>
       </div>
 

frontend/src/pages/HealthPage.jsx

@@ -432,7 +432,7 @@ function DailySnapshot({ day, avg30, intradayHr, bodyBattery, bbHires, onOlder,
 
 // ── Trend Charts ────────────────────────────────────────────────────────────
 
-function MetricChart({ data, dataKey, color, formatter, height = 140, selectedDate, onDayClick }) {
+function MetricChart({ data, dataKey, color, formatter, height = 140, selectedDate, onDayClick, connectNulls = false, showDots = false }) {
   const vals = data.filter(d => d[dataKey] != null)
   if (!vals.length) return (
     <div className="flex items-center justify-center text-gray-600 text-xs" style={{ height }}>No data</div>
@@ -465,7 +465,9 @@ function MetricChart({ data, dataKey, color, formatter, height = 140, selectedDa
           <ReferenceLine x={selectedDate} stroke="#60a5fa" strokeWidth={1.5} strokeDasharray="4 2" />
         )}
         <Area type="monotone" dataKey={dataKey} stroke={color} strokeWidth={2}
-          fill={`url(#grad-${dataKey})`} dot={false} connectNulls={false} isAnimationActive={false} />
+          fill={`url(#grad-${dataKey})`}
+          dot={showDots ? { fill: color, r: 3, strokeWidth: 0 } : false}
+          connectNulls={connectNulls} isAnimationActive={false} />
       </AreaChart>
     </ResponsiveContainer>
   )
@@ -657,9 +659,12 @@ export default function HealthPage() {
 
             <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
               <h3 className="text-sm font-medium text-gray-300 mb-3">Weight</h3>
-              <MetricChart data={metrics} dataKey="weight_kg" color="#34d399"
+              <MetricChart
+                data={metrics.filter(d => d.weight_kg != null)}
+                dataKey="weight_kg" color="#34d399"
                 formatter={v => `${v.toFixed(1)} kg`}
-                selectedDate={selDateForCharts} onDayClick={handleDayClick} />
+                selectedDate={selDateForCharts} onDayClick={handleDayClick}
+                connectNulls showDots />
             </div>
 
             <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
@@ -697,7 +702,7 @@ export default function HealthPage() {
             </div>
 
             <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
-              <h3 className="text-sm font-medium text-gray-300 mb-3">Avg Heart Rate (day)</h3>
+              <h3 className="text-sm font-medium text-gray-300 mb-3">Heart Rate</h3>
               <MetricChart data={metrics} dataKey="avg_hr_day" color="#f97316"
                 formatter={v => `${Math.round(v)} bpm`}
                 selectedDate={selDateForCharts} onDayClick={handleDayClick} />

frontend/src/pages/RecordsPage.jsx

@@ -1,12 +1,13 @@
 import { useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
-import { Link } from 'react-router-dom'
+import { Link, useNavigate } from 'react-router-dom'
 import { LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts'
 import { format } from 'date-fns'
 import api from '../utils/api'
 import { formatDuration, formatDate, formatPace, formatDistance } from '../utils/format'
+import RouteMiniMap from '../components/ui/RouteMiniMap'
 
-const SPORTS = ['running', 'cycling', 'swimming']
+const SPORTS = ['running', 'cycling']
 
 const DISTANCE_ORDER = [
   '400m', '800m', '1k', '1 mile', '3k', '5k', '10k',
@@ -149,6 +150,7 @@ function DistancePRs() {
 }
 
 function RouteRecords() {
+  const navigate = useNavigate()
   const { data: records, isLoading } = useQuery({
     queryKey: ['route-records'],
     queryFn: () => api.get('/records/routes').then(r => r.data),
@@ -168,38 +170,40 @@ function RouteRecords() {
       <table className="w-full text-sm">
         <thead>
           <tr className="text-xs text-gray-500 border-b border-gray-800 bg-gray-900/80">
-            <th className="text-left px-4 py-3 font-medium">Route</th>
-            <th className="text-right px-4 py-3 font-medium">Distance</th>
-            <th className="text-right px-4 py-3 font-medium">Best time</th>
-            <th className="text-right px-4 py-3 font-medium">Pace</th>
-            <th className="text-right px-4 py-3 font-medium">Date</th>
-            <th className="px-4 py-3" />
+            <th className="px-3 py-3" />
+            <th className="text-left px-3 py-3 font-medium">Route</th>
+            <th className="text-right px-3 py-3 font-medium">Distance</th>
+            <th className="text-right px-3 py-3 font-medium">Best time</th>
+            <th className="text-right px-3 py-3 font-medium">Pace</th>
+            <th className="text-right px-3 py-3 font-medium">Date</th>
           </tr>
         </thead>
         <tbody>
           {records.map(rec => (
-            <tr key={rec.route_id} className="border-b border-gray-800/50 hover:bg-gray-800/40 transition-colors">
-              <td className="px-4 py-3 font-medium text-white">
+            <tr
+              key={rec.route_id}
+              onClick={() => navigate(`/activities/${rec.activity_id}`)}
+              className="border-b border-gray-800/50 hover:bg-gray-800/40 transition-colors cursor-pointer"
+            >
+              <td className="px-3 py-2">
+                <RouteMiniMap polyline={rec.reference_polyline} sportType={rec.sport_type} width={72} height={50} />
+              </td>
+              <td className="px-3 py-3 font-medium text-white">
                 <span className="capitalize text-xs text-gray-500 mr-2">{rec.sport_type}</span>
                 {rec.route_name}
               </td>
-              <td className="px-4 py-3 text-right text-gray-400 text-xs">
+              <td className="px-3 py-3 text-right text-gray-400 text-xs">
                 {formatDistance(rec.distance_m)}
               </td>
-              <td className="px-4 py-3 text-right font-mono text-yellow-400 font-semibold">
+              <td className="px-3 py-3 text-right font-mono text-yellow-400 font-semibold">
                 {formatDuration(rec.duration_s)}
               </td>
-              <td className="px-4 py-3 text-right text-gray-400 text-xs">
+              <td className="px-3 py-3 text-right text-gray-400 text-xs">
                 {formatPace(rec.avg_speed_ms, rec.sport_type)}
               </td>
-              <td className="px-4 py-3 text-right text-gray-400 text-xs">
+              <td className="px-3 py-3 text-right text-gray-400 text-xs">
                 {formatDate(rec.start_time)}
               </td>
-              <td className="px-4 py-3 text-right">
-                <Link to={`/activities/${rec.activity_id}`} className="text-xs text-blue-400 hover:underline">
-                  View →
-                </Link>
-              </td>
             </tr>
           ))}
         </tbody>
@@ -226,33 +230,49 @@ function SegmentRecords() {
     ? bests.reduce((sum, b) => sum + b.best_s, 0)
     : null
 
+  if (!routes?.length) return (
+    <p className="text-sm text-gray-600">
+      No named routes yet.{' '}
+      <Link to="/routes" className="text-blue-400 hover:underline">Create one on the Routes page.</Link>
+    </p>
+  )
+
   return (
     <div className="space-y-4">
-      <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
-        <label className="block text-xs text-gray-500 mb-2">Select a route</label>
-        {!routes?.length ? (
-          <p className="text-sm text-gray-600">No named routes yet. <Link to="/routes" className="text-blue-400 hover:underline">Create one on the Routes page.</Link></p>
-        ) : (
-          <select
-            value={selectedRouteId ?? ''}
-            onChange={e => setSelectedRouteId(e.target.value ? parseInt(e.target.value) : null)}
-            className="w-full bg-gray-800 border border-gray-700 text-white text-sm rounded-lg px-3 py-2 focus:outline-none focus:border-blue-500"
+      {/* Route tile grid */}
+      <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 gap-3">
+        {routes.map(r => (
+          <button
+            key={r.id}
+            onClick={() => setSelectedRouteId(r.id === selectedRouteId ? null : r.id)}
+            className={`text-left rounded-xl border p-2 transition-colors ${
+              selectedRouteId === r.id
+                ? 'border-blue-500 bg-blue-900/20'
+                : 'border-gray-800 bg-gray-900 hover:border-gray-600'
+            }`}
           >
-            <option value="">— choose a route —</option>
-            {routes.map(r => (
-              <option key={r.id} value={r.id}>
-                {r.name}{r.distance_m ? ` (${(r.distance_m / 1000).toFixed(1)} km)` : ''}
-              </option>
-            ))}
-          </select>
-        )}
+            <RouteMiniMap
+              polyline={r.reference_polyline}
+              sportType={r.sport_type}
+              width="100%"
+              height={80}
+            />
+            <p className="text-xs font-medium text-white mt-2 truncate">{r.name}</p>
+            {r.distance_m && (
+              <p className="text-xs text-gray-500">{(r.distance_m / 1000).toFixed(1)} km</p>
+            )}
+          </button>
+        ))}
       </div>
 
       {selectedRouteId && (
         isLoading ? (
           <p className="text-gray-500 text-sm">Loading…</p>
         ) : !bests?.length ? (
-          <p className="text-gray-600 text-sm">No segments for this route. <Link to="/segments" className="text-blue-400 hover:underline">Create some on the Segments page.</Link></p>
+          <p className="text-gray-600 text-sm">
+            No segments for this route.{' '}
+            <Link to="/segments" className="text-blue-400 hover:underline">Create some on the Segments page.</Link>
+          </p>
         ) : (
           <div className="bg-gray-900 rounded-xl border border-gray-800 overflow-hidden">
             <table className="w-full text-sm">

frontend/src/pages/SegmentsPage.jsx

@@ -4,6 +4,7 @@ import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { format } from 'date-fns'
 import api from '../utils/api'
 import { formatDuration, formatDistance } from '../utils/format'
+import RouteMiniMap from '../components/ui/RouteMiniMap'
 
 function formatSegmentDist(m) {
   if (m == null) return '--'
@@ -218,26 +219,37 @@ export default function SegmentsPage() {
         <h1 className="text-2xl font-bold text-white">Segments</h1>
       </div>
 
-      {/* Route selector */}
-      <div className="bg-gray-900 rounded-xl border border-gray-800 p-4">
-        <label className="block text-xs text-gray-500 mb-2">Select a route</label>
-        {!routes?.length ? (
+      {/* Route tile grid */}
+      {!routes?.length ? (
+        <div className="bg-gray-900 rounded-xl border border-gray-800 p-6">
           <p className="text-sm text-gray-600">No named routes yet. <Link to="/routes" className="text-blue-400 hover:underline">Create one on the Routes page.</Link></p>
-        ) : (
-          <select
-            value={selectedRouteId ?? ''}
-            onChange={e => setSelectedRouteId(e.target.value ? parseInt(e.target.value) : null)}
-            className="w-full bg-gray-800 border border-gray-700 text-white text-sm rounded-lg px-3 py-2 focus:outline-none focus:border-blue-500"
-          >
-            <option value="">— choose a route —</option>
-            {routes.map(r => (
-              <option key={r.id} value={r.id}>
-                {r.name}{r.distance_m ? ` (${(r.distance_m / 1000).toFixed(1)} km)` : ''}
-              </option>
-            ))}
-          </select>
-        )}
-      </div>
+        </div>
+      ) : (
+        <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 gap-3">
+          {routes.map(r => (
+            <button
+              key={r.id}
+              onClick={() => setSelectedRouteId(r.id === selectedRouteId ? null : r.id)}
+              className={`text-left rounded-xl border p-2 transition-colors ${
+                selectedRouteId === r.id
+                  ? 'border-blue-500 bg-blue-900/20'
+                  : 'border-gray-800 bg-gray-900 hover:border-gray-600'
+              }`}
+            >
+              <RouteMiniMap
+                polyline={r.reference_polyline}
+                sportType={r.sport_type}
+                width="100%"
+                height={80}
+              />
+              <p className="text-xs font-medium text-white mt-2 truncate">{r.name}</p>
+              {r.distance_m && (
+                <p className="text-xs text-gray-500">{(r.distance_m / 1000).toFixed(1)} km</p>
+              )}
+            </button>
+          ))}
+        </div>
+      )}
 
       {selectedRoute && (
         <div className="space-y-4">