Tap a Coming up card -> hourly-detail modal, 20s idle auto-close

Backend now stores hourly points for every day the provider returns (not
just today) -- for Open-Meteo this is free, the hourly= block already
covers the full forecast_days=8 window in the one call, today's strip just
discarded everything past today. Met Office's hourly product window isn't
verified this far out (only daily has been exercised live so far); an
empty result for a given date just means "no hourly detail", handled as a
graceful fallback, not an error.

New GET /api/public/forecast/hourly?date=YYYY-MM-DD backs the modal. The
main /api/public/forecast payload's `hourly` field is now its own scoped
query (today only) rather than filtering the much bigger stored set in JS.

Frontend: tapping any "Coming up" card (tomorrow/day-after or days 4-7)
opens DayModal with that day's hourly points, falling back to the
already-known 3-hourly points (or the single daily summary) if the
provider doesn't have hourly detail that far out. Auto-closes after 20s of
no interaction (pointerdown/keydown/wheel/scroll all reset the timer), with
a depleting progress bar so the countdown isn't a surprise. Extracted
PointMeta/AstroRow and the date/format helpers out of Display.tsx into
shared modules since DayModal needs them too.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/src/lib/weather-fetch.js

@@ -65,8 +65,13 @@ async function fetchFromMetOffice(lat, lon, apiKey) {
 
   const today = londonDateKey(new Date().toISOString())
 
+  // Store every hour the endpoint returns, not just today's — the "tap a Coming up
+  // card" hourly-detail modal needs this for tomorrow/day-after too (see
+  // routes/forecast.js's /forecast/hourly). Met Office's hourly product window
+  // isn't documented/verified here (unlike Open-Meteo, which we know covers the
+  // full forecast_days=8 range) — whatever it actually returns just becomes
+  // whatever range the modal can show; no assumption made about how far it goes.
   const hourlyPoints = hourly
-    .filter(p => londonDateKey(p.time) === today)
     .map(p => ({
       resolution: 'hourly',
       ts: p.time,
@@ -153,8 +158,11 @@ async function fetchFromOpenMeteo(lat, lon) {
     windDir: data.hourly.winddirection_10m?.[i] ?? null,
   }))
 
+  // Store every hour across the full forecast_days=8 window, not just today — the
+  // "tap a Coming up card" hourly-detail modal needs tomorrow/day-after (and, where
+  // available, days 4-7) too. This is free: the hourly= block already covers all 8
+  // days in this one call, today's strip just used to discard everything past today.
   const hourlyPoints = hourlyRows
-    .filter(r => r.dateKey === today)
     .map(r => ({
       resolution: 'hourly',
       ts: r.time,

backend/src/routes/forecast.js

@@ -16,15 +16,25 @@ function rowToPoint(r) {
   }
 }
 
+// forecast_points' 'hourly' resolution now holds every day the provider returned
+// (see lib/weather-fetch.js — needed for the per-day hourly modal below), not just
+// today, so the main payload's `hourly` field is scoped to today with its own query
+// rather than filtering a much bigger already-fetched set in JS.
 async function buildPayload() {
+  const { rows: hourlyToday } = await pool.query(
+    `SELECT * FROM forecast_points
+      WHERE resolution = 'hourly'
+        AND (ts AT TIME ZONE 'Europe/London')::date = (NOW() AT TIME ZONE 'Europe/London')::date
+      ORDER BY ts ASC`
+  )
   const { rows } = await pool.query(
-    `SELECT * FROM forecast_points ORDER BY ts ASC`
+    `SELECT * FROM forecast_points WHERE resolution IN ('3hourly', 'daily') ORDER BY ts ASC`
   )
   const { rows: astroRows } = await pool.query(
     `SELECT date, sunrise, sunset FROM forecast_astro ORDER BY date ASC`
   )
   const status = await getStatus()
-  const hourly = rows.filter(r => r.resolution === 'hourly').map(rowToPoint)
+  const hourly = hourlyToday.map(rowToPoint)
   // "Later" is relative to whoever's looking at the screen right now, not to when
   // the hourly data was last fetched — compute this fresh per-request, not at
   // refresh time (see lib/summary.js).
@@ -44,12 +54,37 @@ async function buildPayload() {
   }
 }
 
+const DATE_RE = /^\d{4}-\d{2}-\d{2}$/
+
 // Public, unauthenticated — this is the whole point of the app: a reception lobby
 // display can't reasonably sit behind a login screen. No PII, no write actions, just
 // read-only forecast data, so it deliberately skips requireAuth entirely (see
 // project_weather memory's access-model decision).
 export async function publicForecastRoutes(app) {
   app.get('/api/public/forecast', async () => buildPayload())
+
+  // GET /api/public/forecast/hourly?date=YYYY-MM-DD — backs the "tap a Coming up
+  // card" modal. Whether a date beyond tomorrow/day-after actually has hourly rows
+  // depends entirely on how far the active provider's hourly product reaches
+  // (confirmed for Open-Meteo: the full forecast_days=8 window; NOT verified for Met
+  // Office — see lib/weather-fetch.js) — an empty `points` array just means "no
+  // hourly detail for this day", the frontend falls back to whatever coarser data
+  // it already has (3-hourly or the daily summary) rather than treating it as an
+  // error.
+  app.get('/api/public/forecast/hourly', async (req, reply) => {
+    const date = req.query?.date
+    if (typeof date !== 'string' || !DATE_RE.test(date)) {
+      return reply.status(400).send({ error: 'date must be YYYY-MM-DD' })
+    }
+    const { rows } = await pool.query(
+      `SELECT * FROM forecast_points
+        WHERE resolution = 'hourly'
+          AND (ts AT TIME ZONE 'Europe/London')::date = $1::date
+        ORDER BY ts ASC`,
+      [date]
+    )
+    return { date, points: rows.map(rowToPoint) }
+  })
 }
 
 // Service-to-service — same bearer-secret convention as settings' /internal/*

frontend/src/api.ts

@@ -1,4 +1,4 @@
-import type { ForecastPayload, AdminStatus, DisplayConfig } from './types'
+import type { ForecastPayload, AdminStatus, DisplayConfig, DayHourly } from './types'
 
 const BASE = '/weather/api'
 
@@ -17,6 +17,16 @@ export async function fetchDisplayConfig(): Promise<DisplayConfig> {
   return res.json()
 }
 
+// Backs the "tap a Coming up card" modal — hourly detail for one specific day.
+// `points` can be empty (e.g. a day beyond how far the active provider's hourly
+// product actually reaches); that's not an error, the modal falls back to whatever
+// coarser data it already has for that day.
+export async function fetchHourlyForDate(date: string): Promise<DayHourly> {
+  const res = await fetch(`${BASE}/public/forecast/hourly?date=${encodeURIComponent(date)}`)
+  if (!res.ok) throw new Error(`Request failed: ${res.status}`)
+  return res.json()
+}
+
 // Admin (authed) requests — same 401-redirect pattern as every other app's api.ts.
 async function adminRequest<T>(path: string, opts: RequestInit = {}): Promise<T> {
   const res = await fetch(`${BASE}${path}`, {

frontend/src/components/AstroRow.tsx

@@ -0,0 +1,17 @@
+import { Sunrise, Sunset } from 'lucide-react'
+import { formatClockTime } from '../lib/format'
+import type { Astro } from '../types'
+
+export function AstroRow({ astro }: { astro?: Astro }) {
+  if (!astro || (!astro.sunrise && !astro.sunset)) return null
+  return (
+    <span className="wx-astro">
+      {astro.sunrise && (
+        <span className="wx-astro-item"><Sunrise size={16} strokeWidth={1.75} />{formatClockTime(astro.sunrise)}</span>
+      )}
+      {astro.sunset && (
+        <span className="wx-astro-item"><Sunset size={16} strokeWidth={1.75} />{formatClockTime(astro.sunset)}</span>
+      )}
+    </span>
+  )
+}

frontend/src/components/DayModal.tsx

@@ -0,0 +1,110 @@
+import { useEffect, useRef, useState } from 'react'
+import { X, CloudOff } from 'lucide-react'
+import { fetchHourlyForDate } from '../api'
+import { WeatherIcon } from '../lib/icons'
+import { PointMeta } from './PointMeta'
+import { AstroRow } from './AstroRow'
+import { formatHour, roundTemp } from '../lib/format'
+import type { ForecastPoint, Astro } from '../types'
+
+// Auto-dismiss back to the idle display after this long with no interaction —
+// this is a reception kiosk, a modal left open by whoever last tapped it would
+// otherwise sit there indefinitely for the next guest walking past.
+const IDLE_MS = 20_000
+
+interface DayModalProps {
+  dateKey: string       // YYYY-MM-DD
+  dayLabel: string      // "Tuesday"
+  fallbackPoints: ForecastPoint[]  // already-known 3-hourly points, or a single daily point
+  fallbackResolution: '3hourly' | 'daily'
+  astro?: Astro
+  onClose: () => void
+}
+
+export function DayModal({ dateKey, dayLabel, fallbackPoints, fallbackResolution, astro, onClose }: DayModalProps) {
+  const [points, setPoints] = useState<ForecastPoint[] | null>(null)
+  const [error, setError] = useState(false)
+  const [resetTick, setResetTick] = useState(0)
+  const timerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  useEffect(() => {
+    let cancelled = false
+    fetchHourlyForDate(dateKey)
+      .then(r => { if (!cancelled) setPoints(r.points) })
+      .catch(() => { if (!cancelled) setError(true) })
+    return () => { cancelled = true }
+  }, [dateKey])
+
+  useEffect(() => {
+    function reset() {
+      if (timerRef.current) clearTimeout(timerRef.current)
+      timerRef.current = setTimeout(onClose, IDLE_MS)
+      setResetTick(t => t + 1)
+    }
+    reset()
+    // pointerdown covers touch + mouse + stylus in one; deliberately no mousemove —
+    // that would fire continuously and defeat the point of an idle timeout.
+    const events = ['pointerdown', 'keydown', 'wheel'] as const
+    events.forEach(e => window.addEventListener(e, reset))
+    window.addEventListener('scroll', reset, true) // capture — scroll doesn't bubble
+    return () => {
+      if (timerRef.current) clearTimeout(timerRef.current)
+      events.forEach(e => window.removeEventListener(e, reset))
+      window.removeEventListener('scroll', reset, true)
+    }
+  }, [onClose])
+
+  const hasHourly = points != null && points.length > 0
+  const resolution = hasHourly ? 'hourly' : fallbackResolution
+  const showPoints = hasHourly ? points! : fallbackPoints
+
+  return (
+    <div className="wx-modal-overlay" onClick={onClose}>
+      <div className="wx-modal" onClick={e => e.stopPropagation()}>
+        <div className="wx-modal-header">
+          <div>
+            <div className="wx-modal-title">{dayLabel}</div>
+            <AstroRow astro={astro} />
+          </div>
+          <button className="wx-modal-close" onClick={onClose} aria-label="Close">
+            <X size={22} strokeWidth={1.75} />
+          </button>
+        </div>
+
+        {points === null && !error && <div className="wx-modal-empty">Loading…</div>}
+        {error && points === null && (
+          <div className="wx-modal-empty">
+            <CloudOff size={28} strokeWidth={1.5} />
+            <p>Couldn't load hourly detail.</p>
+          </div>
+        )}
+
+        {points !== null && (
+          <>
+            {!hasHourly && (
+              <p className="wx-modal-note">
+                {fallbackResolution === '3hourly'
+                  ? "Hourly detail isn't available this far ahead — showing 3-hour steps instead."
+                  : "Hourly detail isn't available this far ahead — showing the daily overview instead."}
+              </p>
+            )}
+            <div className="wx-modal-hourly">
+              {showPoints.map(p => (
+                <div className="wx-modal-point" key={p.ts}>
+                  {resolution !== 'daily' && <span className="wx-modal-point-time">{formatHour(p.ts)}</span>}
+                  <WeatherIcon icon={p.icon} size={34} />
+                  <span className="wx-modal-point-temp">{roundTemp(p.temp_c)}</span>
+                  <PointMeta point={p} large />
+                </div>
+              ))}
+            </div>
+          </>
+        )}
+
+        <div className="wx-modal-timeout-track">
+          <div className="wx-modal-timeout-bar" key={resetTick} />
+        </div>
+      </div>
+    </div>
+  )
+}

frontend/src/components/PointMeta.tsx

@@ -0,0 +1,28 @@
+import { Droplet, Wind } from 'lucide-react'
+import { compassFromDeg } from '../lib/format'
+import type { ForecastPoint } from '../types'
+
+// Rain% and wind, each on their own line with a small leading icon. `large` bumps
+// the text size for today's hourly cards and the day modal; the next-2-days cards
+// stay at the smaller default so today still reads as the primary/detailed view.
+export function PointMeta({ point, large }: { point: ForecastPoint; large?: boolean }) {
+  if (point.precip_prob == null && point.wind_speed_mph == null) return null
+  const iconSize = large ? 13 : 10
+  return (
+    <span className={`wx-meta${large ? ' wx-meta-lg' : ''}`}>
+      {point.precip_prob != null && (
+        <span className="wx-meta-line wx-meta-precip">
+          <Droplet size={iconSize} strokeWidth={2} />
+          {Math.round(point.precip_prob)}%
+        </span>
+      )}
+      {point.wind_speed_mph != null && (
+        <span className="wx-meta-line wx-meta-wind">
+          <Wind size={iconSize} strokeWidth={2} />
+          {point.wind_dir_deg != null ? `${compassFromDeg(point.wind_dir_deg)} ` : ''}
+          {Math.round(point.wind_speed_mph)}mph
+        </span>
+      )}
+    </span>
+  )
+}

frontend/src/index.css

@@ -239,6 +239,76 @@ html, body, #root { height: 100%; margin: 0; font-size: 14px; }
   gap: 12px; background: var(--navy-dark); color: var(--text-muted);
 }
 
+/* Every "Coming up" card opens the hourly-detail modal on tap — see DayModal. */
+.wx-tappable { cursor: pointer; transition: background .12s, transform .08s; }
+.wx-tappable:hover { background: var(--surface-2); }
+.wx-tappable:active { transform: scale(0.97); }
+
+/* ── Day-detail modal (opened by tapping a "Coming up" card) ────────────── */
+.wx-modal-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(15,15,32,0.72);
+  backdrop-filter: blur(2px);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 24px;
+  z-index: 500;
+}
+.wx-modal {
+  background: var(--navy);
+  border: 1px solid var(--surface-2);
+  border-radius: var(--radius);
+  box-shadow: var(--shadow-md);
+  width: min(92vw, 920px);
+  max-height: 85vh;
+  padding: clamp(18px, 2.6vh, 32px);
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  color: var(--text);
+  overflow: hidden;
+}
+.wx-modal-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
+.wx-modal-title { font-size: clamp(1.3rem, 2.4vw, 2rem); font-weight: 700; color: var(--gold); }
+.wx-modal-close {
+  background: none; border: none; color: var(--text-muted); cursor: pointer;
+  padding: 4px; display: flex; flex-shrink: 0;
+}
+.wx-modal-close:hover { color: var(--text); }
+.wx-modal-note { color: var(--text-muted); font-size: clamp(0.8rem, 1vw, 0.95rem); margin: 0; }
+.wx-modal-empty {
+  display: flex; flex-direction: column; align-items: center; justify-content: center;
+  gap: 10px; color: var(--text-muted); padding: 40px 0;
+}
+.wx-modal-hourly {
+  display: flex;
+  align-items: stretch;
+  gap: clamp(8px, 1.2vw, 16px);
+  overflow-x: auto;
+  padding-bottom: 4px;
+}
+.wx-modal-point {
+  flex: 1 0 clamp(64px, 7vw, 90px);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: space-between;
+  gap: 6px;
+  padding: clamp(10px, 1.4vh, 16px) 6px;
+  border-radius: var(--radius);
+  background: var(--surface-2);
+}
+.wx-modal-point-time { font-size: clamp(0.72rem, 0.85vw, 0.9rem); color: var(--text-muted); }
+.wx-modal-point-temp { font-size: clamp(1.1rem, 1.3vw, 1.4rem); font-weight: 600; }
+
+/* Idle-timeout progress bar — depletes over the 20s auto-close window, restarting
+   (via the DayModal's resetTick key, which remounts this element) on interaction. */
+.wx-modal-timeout-track { height: 3px; background: var(--surface-2); border-radius: 2px; overflow: hidden; flex-shrink: 0; }
+.wx-modal-timeout-bar { height: 100%; background: var(--gold); animation: wx-timeout-deplete 20s linear forwards; }
+@keyframes wx-timeout-deplete { from { width: 100%; } to { width: 0%; } }
+
 /* ── Admin (authed) page ──────────────────────────────────────────────── */
 .wx-admin-shell { min-height: 100vh; background: var(--body-bg); display: flex; justify-content: center; padding: 32px 16px; }
 .wx-admin-panel { width: 100%; max-width: 560px; }

frontend/src/lib/format.ts

@@ -0,0 +1,35 @@
+// Shared date/time/unit formatting for the display — used by both Display.tsx and
+// the DayModal it opens, so it lives here rather than being duplicated or exported
+// awkwardly out of the page component.
+export const TZ = 'Europe/London'
+
+export function londonNow(): Date {
+  return new Date(new Date().toLocaleString('en-US', { timeZone: TZ }))
+}
+export function hourOf(iso: string): number {
+  return parseInt(new Date(iso).toLocaleString('en-GB', { timeZone: TZ, hour: '2-digit', hour12: false }))
+}
+export function dateKeyOf(iso: string): string {
+  return new Date(iso).toLocaleDateString('en-CA', { timeZone: TZ })
+}
+export function formatHour(iso: string): string {
+  return new Date(iso).toLocaleTimeString('en-GB', { timeZone: TZ, hour: 'numeric', hour12: false }) + ':00'
+}
+export function formatClockTime(iso: string): string {
+  return new Date(iso).toLocaleTimeString('en-GB', { timeZone: TZ, hour: '2-digit', minute: '2-digit' })
+}
+export function formatDayName(iso: string): string {
+  return new Date(iso).toLocaleDateString('en-GB', { timeZone: TZ, weekday: 'long' })
+}
+export function formatDayDate(iso: string): string {
+  return new Date(iso).toLocaleDateString('en-GB', { timeZone: TZ, day: 'numeric', month: 'long' })
+}
+
+const COMPASS = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW']
+export function compassFromDeg(deg: number): string {
+  return COMPASS[Math.round(deg / 45) % 8]
+}
+
+export function roundTemp(c: number): string {
+  return `${Math.round(c)}°`
+}

frontend/src/pages/Display.tsx

@@ -1,79 +1,23 @@
 import { useEffect, useRef, useState } from 'react'
-import { CloudOff, Sunrise, Sunset, Umbrella, Droplet, Wind } from 'lucide-react'
+import { CloudOff, Umbrella } from 'lucide-react'
 import { fetchForecast, fetchDisplayConfig } from '../api'
 import { WeatherIcon } from '../lib/icons'
+import { PointMeta } from '../components/PointMeta'
+import { AstroRow } from '../components/AstroRow'
+import { DayModal } from '../components/DayModal'
+import { TZ, londonNow, hourOf, dateKeyOf, formatHour, formatDayName, roundTemp } from '../lib/format'
 import type { ForecastPayload, ForecastPoint, Astro } from '../types'
 
 const POLL_MS = 5 * 60 * 1000 // client polls more often than the server's hourly
                                // refresh just so a stale tab catches up quickly —
                                // the actual new data only shows up on the hour.
-const TZ = 'Europe/London'
 
-function londonNow(): Date {
-  return new Date(new Date().toLocaleString('en-US', { timeZone: TZ }))
-}
-function hourOf(iso: string): number {
-  return parseInt(new Date(iso).toLocaleString('en-GB', { timeZone: TZ, hour: '2-digit', hour12: false }))
-}
-function dateKeyOf(iso: string): string {
-  return new Date(iso).toLocaleDateString('en-CA', { timeZone: TZ })
-}
-function formatHour(iso: string): string {
-  return new Date(iso).toLocaleTimeString('en-GB', { timeZone: TZ, hour: 'numeric', hour12: false }) + ':00'
-}
-function formatClockTime(iso: string): string {
-  return new Date(iso).toLocaleTimeString('en-GB', { timeZone: TZ, hour: '2-digit', minute: '2-digit' })
-}
-function formatDayName(iso: string): string {
-  return new Date(iso).toLocaleDateString('en-GB', { timeZone: TZ, weekday: 'long' })
-}
-
-const COMPASS = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW']
-function compassFromDeg(deg: number): string {
-  return COMPASS[Math.round(deg / 45) % 8]
-}
-
-function roundTemp(c: number): string {
-  return `${Math.round(c)}°`
-}
-
-function AstroRow({ astro }: { astro?: Astro }) {
-  if (!astro || (!astro.sunrise && !astro.sunset)) return null
-  return (
-    <span className="wx-astro">
-      {astro.sunrise && (
-        <span className="wx-astro-item"><Sunrise size={16} strokeWidth={1.75} />{formatClockTime(astro.sunrise)}</span>
-      )}
-      {astro.sunset && (
-        <span className="wx-astro-item"><Sunset size={16} strokeWidth={1.75} />{formatClockTime(astro.sunset)}</span>
-      )}
-    </span>
-  )
-}
-
-// Rain% and wind, each on their own line with a small leading icon. `large` bumps
-// the text size for today's hourly cards; the next-2-days cards stay at the
-// smaller default so today still reads as the primary/detailed view.
-function PointMeta({ point, large }: { point: ForecastPoint; large?: boolean }) {
-  if (point.precip_prob == null && point.wind_speed_mph == null) return null
-  const iconSize = large ? 13 : 10
-  return (
-    <span className={`wx-meta${large ? ' wx-meta-lg' : ''}`}>
-      {point.precip_prob != null && (
-        <span className="wx-meta-line wx-meta-precip">
-          <Droplet size={iconSize} strokeWidth={2} />
-          {Math.round(point.precip_prob)}%
-        </span>
-      )}
-      {point.wind_speed_mph != null && (
-        <span className="wx-meta-line wx-meta-wind">
-          <Wind size={iconSize} strokeWidth={2} />
-          {point.wind_dir_deg != null ? `${compassFromDeg(point.wind_dir_deg)} ` : ''}
-          {Math.round(point.wind_speed_mph)}mph
-        </span>
-      )}
-    </span>
-  )
+interface SelectedDay {
+  dateKey: string
+  dayLabel: string
+  fallbackPoints: ForecastPoint[]
+  fallbackResolution: '3hourly' | 'daily'
+  astro?: Astro
 }
 
 export default function Display() {
@@ -85,6 +29,7 @@ export default function Display() {
   const [displayTitle, setDisplayTitle] = useState<string | null>(null)
   const hotelName = displayTitle || import.meta.env.VITE_HOTEL_NAME || 'Hotel'
   const hourlyRowRef = useRef<HTMLDivElement>(null)
+  const [selectedDay, setSelectedDay] = useState<SelectedDay | null>(null)
 
   useEffect(() => {
     let cancelled = false
@@ -196,12 +141,23 @@ export default function Display() {
       <div className="wx-section-label">Coming up</div>
 
       {/* One grid track shared by both — sized to fit whatever's left of the
-          viewport, so this can never push the page past 100vh. */}
+          viewport, so this can never push the page past 100vh. Every card here
+          opens the hourly-detail modal on tap (see DayModal). */}
       <div className="wx-coming-up">
         {nextDayGroups.length > 0 && (
           <div className="wx-next-days">
             {nextDayGroups.map(g => (
-              <div className="wx-next-day-card" key={g.key}>
+              <div
+                className="wx-next-day-card wx-tappable"
+                key={g.key}
+                onClick={() => setSelectedDay({
+                  dateKey: g.key,
+                  dayLabel: formatDayName(g.points[0].ts),
+                  fallbackPoints: g.points,
+                  fallbackResolution: '3hourly',
+                  astro: data.astro[g.key],
+                })}
+              >
                 <div className="wx-next-day-title-row">
                   <span className="wx-next-day-title">{formatDayName(g.points[0].ts)}</span>
                   <AstroRow astro={data.astro[g.key]} />
@@ -223,7 +179,17 @@ export default function Display() {
 
         <div className="wx-daily-row">
           {data.daily.map(p => (
-            <div className="wx-day-card" key={p.ts}>
+            <div
+              className="wx-day-card wx-tappable"
+              key={p.ts}
+              onClick={() => setSelectedDay({
+                dateKey: dateKeyOf(p.ts),
+                dayLabel: formatDayName(p.ts),
+                fallbackPoints: [p],
+                fallbackResolution: 'daily',
+                astro: data.astro[dateKeyOf(p.ts)],
+              })}
+            >
               <span className="wx-day-name">{formatDayName(p.ts)}</span>
               <WeatherIcon icon={p.icon} size={28} />
               <span className="wx-day-temps">
@@ -241,6 +207,17 @@ export default function Display() {
           {error ? ' — showing last known forecast' : ''}
         </div>
       )}
+
+      {selectedDay && (
+        <DayModal
+          dateKey={selectedDay.dateKey}
+          dayLabel={selectedDay.dayLabel}
+          fallbackPoints={selectedDay.fallbackPoints}
+          fallbackResolution={selectedDay.fallbackResolution}
+          astro={selectedDay.astro}
+          onClose={() => setSelectedDay(null)}
+        />
+      )}
     </div>
   )
 }

frontend/src/types.ts

@@ -41,6 +41,11 @@ export interface ForecastPayload {
   }
 }
 
+export interface DayHourly {
+  date: string           // YYYY-MM-DD, London-local
+  points: ForecastPoint[] // can be empty — see api.ts's fetchHourlyForDate
+}
+
 export interface DisplayConfig {
   display_title: string | null // null = no override, frontend falls back to VITE_HOTEL_NAME
 }