spa: restore metrics on dashboard; it was the only route to the metrics page

hiding the card when nothing was recorded made /metrics unreachable, so an
account with no readings could never enter its first one. always shown now,
with today's readings or a prompt. second entry point on stats.

also: metric inputs had no label association, so all eight announced as
'Not recorded' (the placeholder). minutes read as 7h 12m, not 432.

spa/src/components/dashboard/metrics-card.tsx

@@ -2,20 +2,25 @@ import { Link } from "@tanstack/react-router"
 import { ChevronRight } from "lucide-react"
 import { Card, CardContent } from "@/components/ui/card"
 import { METRIC_FIELDS } from "@/components/metric/metric-fields"
-import { byKind, useDailyMetrics, useTracksMetrics } from "@/hooks/use-metrics"
+import { formatMetric } from "@/components/metric/metric-value"
+import type { MetricField } from "@/components/metric/metric-fields"
+import { byKind, useDailyMetrics } from "@/hooks/use-metrics"
 import { today } from "@/lib/day"
+import type { DailyMetricResponse } from "@/api/schema"
 
 const MOST_SHOWN = 3
 
-/** Today's readings, for accounts that record them. */
+/**
+ * Today's readings, and the way in to record them. Always present: this is the
+ * only route to the metrics screen, so hiding it when nothing is recorded
+ * leaves an account that has never entered a reading unable to enter its
+ * first one.
+ */
 export function MetricsCard() {
   const day = today()
-  const tracks = useTracksMetrics()
   const { data } = useDailyMetrics(day, day)
   const recorded = byKind(data)
 
-  if (!tracks) return null
-
   const shown = METRIC_FIELDS.filter((field) => recorded.has(field.kind)).slice(
     0,
     MOST_SHOWN
@@ -23,35 +28,20 @@ export function MetricsCard() {
 
   return (
     <Link to="/metrics" aria-label="Daily metrics">
-      <Card>
+      <Card className="transition-colors hover:bg-muted/50">
         <CardContent className="flex items-center justify-between gap-3 py-4">
           {shown.length ? (
             <div className="flex flex-1 items-center justify-around">
-              {shown.map((field) => {
-                const Icon = field.icon
-                return (
-                  <div
-                    key={field.kind}
-                    className="flex flex-col items-center gap-1"
-                  >
-                    <Icon
-                      className="h-4 w-4 text-muted-foreground"
-                      aria-hidden="true"
-                    />
-                    <span className="text-sm font-semibold tabular-nums">
-                      {recorded.get(field.kind)?.value.toLocaleString()}
-                    </span>
-                    <span className="text-[10px] text-muted-foreground">
-                      {field.label}
-                    </span>
-                  </div>
-                )
-              })}
+              {shown.map((field) => (
+                <Reading
+                  key={field.kind}
+                  field={field}
+                  reading={recorded.get(field.kind)}
+                />
+              ))}
             </div>
           ) : (
-            <span className="text-sm text-muted-foreground">
-              No readings today
-            </span>
+            <Prompt />
           )}
           <ChevronRight
             className="h-4 w-4 shrink-0 text-muted-foreground"
@@ -62,3 +52,34 @@ export function MetricsCard() {
     </Link>
   )
 }
+
+function Reading({
+  field,
+  reading,
+}: {
+  field: MetricField
+  reading: DailyMetricResponse | undefined
+}) {
+  const Icon = field.icon
+
+  return (
+    <div className="flex flex-col items-center gap-1">
+      <Icon className="h-4 w-4 text-muted-foreground" aria-hidden="true" />
+      <span className="text-sm font-semibold tabular-nums">
+        {reading ? formatMetric(field, reading.value) : "—"}
+      </span>
+      <span className="text-[10px] text-muted-foreground">{field.label}</span>
+    </div>
+  )
+}
+
+function Prompt() {
+  const Icon = METRIC_FIELDS[0].icon
+
+  return (
+    <div className="flex items-center gap-2">
+      <Icon className="h-4 w-4 text-muted-foreground" aria-hidden="true" />
+      <span className="text-sm">Add today's metrics</span>
+    </div>
+  )
+}

spa/src/components/metric/metric-row.tsx

@@ -7,39 +7,49 @@ type MetricRowProps = {
   field: MetricField
   stored: DailyMetricResponse | undefined
   draft: string
+  invalid?: boolean
   onChange: (draft: string) => void
 }
 
-export function MetricRow({ field, stored, draft, onChange }: MetricRowProps) {
+export function MetricRow({
+  field,
+  stored,
+  draft,
+  invalid = false,
+  onChange,
+}: MetricRowProps) {
   const Icon = field.icon
+  // Ties the label and the note to the field. Without the first of these the
+  // only name the input had was its placeholder, so every one of them
+  // announced itself as "Not recorded".
+  const inputId = `metric-${field.kind}`
+  const noteId = `${inputId}-note`
 
   return (
     <div className="flex flex-col gap-1.5">
-      <Label className="flex items-center gap-2 text-xs">
-        <Icon className="h-3.5 w-3.5 text-muted-foreground" />
+      <Label htmlFor={inputId} className="flex items-center gap-2 text-xs">
+        <Icon className="h-3.5 w-3.5 text-muted-foreground" aria-hidden="true" />
         {field.label}
         <span className="text-muted-foreground">({field.unit})</span>
       </Label>
       <Input
+        id={inputId}
         type="number"
         inputMode="numeric"
         min={field.min}
         max={field.max}
         placeholder="Not recorded"
+        aria-invalid={invalid || undefined}
+        aria-describedby={stored ? noteId : undefined}
         value={draft}
         onChange={(event) => onChange(event.target.value)}
       />
-      {stored?.provider ? (
-        <p className="text-xs text-muted-foreground">
-          Reported by {stored.provider}. Saving replaces it with your own; empty
-          the field to clear it, and a later import may report it again.
+      {stored && (
+        <p id={noteId} className="text-xs text-muted-foreground">
+          {stored.provider
+            ? `Reported by ${stored.provider}. Saving replaces it with your own; empty the field to clear it, and a later import may report it again.`
+            : "Entered by you. Empty the field to clear it."}
         </p>
-      ) : (
-        stored && (
-          <p className="text-xs text-muted-foreground">
-            Entered by you. Empty the field to clear it.
-          </p>
-        )
       )}
     </div>
   )

spa/src/components/metric/metric-value.ts

@@ -0,0 +1,19 @@
+import type { MetricField } from "./metric-fields"
+
+const MINUTES_PER_HOUR = 60
+
+/**
+ * A reading as it should be read back. "432" under a heading of "Sleep" says
+ * very little; "7h 12m" says the thing itself.
+ */
+export function formatMetric(field: MetricField, value: number): string {
+  if (field.unit !== "minutes") return value.toLocaleString()
+
+  const hours = Math.floor(value / MINUTES_PER_HOUR)
+  const minutes = value % MINUTES_PER_HOUR
+
+  if (hours === 0) return `${minutes}m`
+  if (minutes === 0) return `${hours}h`
+
+  return `${hours}h ${minutes}m`
+}

spa/src/components/metric/metrics-editor.tsx

@@ -81,6 +81,7 @@ export function MetricsEditor({ date, stored }: MetricsEditorProps) {
               field={field}
               stored={recorded.get(field.kind)}
               draft={drafts[field.kind] ?? ""}
+              invalid={invalid.includes(field)}
               onChange={(draft) =>
                 setDrafts((current) => ({ ...current, [field.kind]: draft }))
               }

spa/src/components/stats/metrics-link.tsx

@@ -0,0 +1,35 @@
+import { Link } from "@tanstack/react-router"
+import { ChevronRight, LineChart } from "lucide-react"
+import { Card, CardContent } from "@/components/ui/card"
+
+/**
+ * The second way in to daily metrics. They belong with the statistics — and a
+ * single entry point on the dashboard once meant that an account with nothing
+ * recorded could not reach the screen at all.
+ */
+export function MetricsLink() {
+  return (
+    <Link to="/metrics">
+      <Card className="transition-colors hover:bg-muted/50">
+        <CardContent className="flex items-center justify-between gap-3 py-4">
+          <div className="flex items-center gap-3">
+            <LineChart
+              className="h-4 w-4 text-muted-foreground"
+              aria-hidden="true"
+            />
+            <div className="flex flex-col">
+              <span className="text-sm">Daily metrics</span>
+              <span className="text-xs text-muted-foreground">
+                Steps, sleep, heart rate and the rest
+              </span>
+            </div>
+          </div>
+          <ChevronRight
+            className="h-4 w-4 shrink-0 text-muted-foreground"
+            aria-hidden="true"
+          />
+        </CardContent>
+      </Card>
+    </Link>
+  )
+}

spa/src/hooks/use-metrics.ts

@@ -1,7 +1,5 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query"
-import { subDays } from "date-fns"
 import { metrics } from "@/api/client"
-import { formatDate } from "@/lib/day"
 import type {
   DailyMetricResponse,
   MetricKind,
@@ -33,19 +31,3 @@ export function byKind(
 ): Map<MetricKind, DailyMetricResponse> {
   return new Map(stored?.map((metric) => [metric.kind, metric]) ?? [])
 }
-
-const DAYS_THAT_MAKE_A_HABIT = 30
-
-/**
- * Whether this account records daily metrics at all. Someone who has never
- * entered one should not be shown a card asking about their steps.
- */
-export function useTracksMetrics(): boolean {
-  const today = new Date()
-  const { data } = useDailyMetrics(
-    formatDate(subDays(today, DAYS_THAT_MAKE_A_HABIT)),
-    formatDate(today)
-  )
-
-  return (data?.length ?? 0) > 0
-}

spa/src/routes/_auth/stats.lazy.tsx

@@ -7,6 +7,7 @@ import { MoodDistribution } from "@/components/stats/mood-distribution"
 import { MoodCorrelations } from "@/components/stats/mood-correlations"
 import { MoodSummary } from "@/components/stats/mood-summary"
 import { HeatmapSection } from "@/components/stats/heatmap-section"
+import { MetricsLink } from "@/components/stats/metrics-link"
 import { useMoodStats } from "@/hooks/use-stats"
 import { useTrend } from "@/hooks/use-trend"
 import { PERIODS, PERIOD_LABELS } from "@/lib/period"
@@ -60,6 +61,8 @@ function StatsPage() {
       ) : null}
 
       <HeatmapSection />
+
+      <MetricsLink />
     </div>
   )
 }