Revert precip% hiding; headline now says 'slim chance of rain' instead

Wrong direction on the previous fix -- hiding the number lost real
information. Better fix: when no hour's icon is rain-classified but there's
still a real (if low) numeric precip_prob somewhere in the day, the
headline now says 'Mostly dry, slim chance of rain' instead of a flat 'Dry
today' that silently disagreed with a 5% sitting on an hour card. Rain% is
shown unconditionally again everywhere (hourly cards, next-2-days cards,
the Now hero line).

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

backend/src/lib/summary.js

@@ -27,6 +27,13 @@ export function summarizeToday(points, nowHour) {
   const rainFraction = rainPoints.length / points.length
   const snowFraction = snowPoints.length / points.length
 
+  // precip_prob is a separate field from the icon (see the frontend fix this
+  // replaces) — an hour's icon can be non-rain while it still carries a real, if
+  // slim, numeric chance. Worth surfacing in the headline rather than a flat "Dry"
+  // that silently disagrees with a "5%" sitting right there on an hour card.
+  const precipValues = points.map(p => p.precip_prob).filter(v => v != null)
+  const maxPrecip = precipValues.length ? Math.max(...precipValues) : null
+
   const laterPoints = points.filter(p => hourOf(p) >= nowHour)
   const earlierPoints = points.filter(p => hourOf(p) < nowHour)
   const laterWetFraction = laterPoints.length
@@ -38,7 +45,7 @@ export function summarizeToday(points, nowHour) {
   if (snowFraction > 0.3) {
     headline = 'Snow expected today'
   } else if (rainPoints.length === 0 && thunderPoints.length === 0) {
-    headline = 'Dry today'
+    headline = maxPrecip != null && maxPrecip >= 15 ? 'Mostly dry, slim chance of rain' : 'Dry today'
   } else if (rainPoints.some(isHeavyRain) && rainFraction > 0.5) {
     headline = 'Heavy rain today'
   } else if (rainFraction > 0.6) {

frontend/src/pages/Display.tsx

@@ -33,12 +33,6 @@ function compassFromDeg(deg: number): string {
   return COMPASS[Math.round(deg / 45) % 8]
 }
 
-// Below this, a rain% reads as noise, not information — and worse, it can visibly
-// contradict the "Dry today" headline (which is icon-based, not precip_prob-based:
-// an hour can have a non-rain icon and still carry a token 5% chance). Hiding trivial
-// percentages keeps what's shown consistent with what "Dry today" is actually saying.
-const MIN_PRECIP_DISPLAY = 15
-
 function roundTemp(c: number): string {
   return `${Math.round(c)}°`
 }
@@ -61,15 +55,14 @@ function AstroRow({ astro }: { astro?: Astro }) {
 // the text size for today's hourly cards; the next-2-days cards stay at the
 // smaller default so today still reads as the primary/detailed view.
 function PointMeta({ point, large }: { point: ForecastPoint; large?: boolean }) {
-  const showPrecip = point.precip_prob != null && point.precip_prob >= MIN_PRECIP_DISPLAY
+  if (point.precip_prob == null && point.wind_speed_mph == null) return null
-  if (!showPrecip && point.wind_speed_mph == null) return null
   const iconSize = large ? 13 : 10
   return (
     <span className={`wx-meta${large ? ' wx-meta-lg' : ''}`}>
-      {showPrecip && (
+      {point.precip_prob != null && (
         <span className="wx-meta-line wx-meta-precip">
           <Droplet size={iconSize} strokeWidth={2} />
-          {Math.round(point.precip_prob!)}%
+          {Math.round(point.precip_prob)}%
         </span>
       )}
       {point.wind_speed_mph != null && (
@@ -172,8 +165,8 @@ export default function Display() {
             {data.summary && <span className="wx-summary-headline">{data.summary.headline}</span>}
             <span>
               {currentPoint.feels_like_c != null && <>Feels like {roundTemp(currentPoint.feels_like_c)}</>}
-              {currentPoint.feels_like_c != null && currentPoint.precip_prob != null && currentPoint.precip_prob >= MIN_PRECIP_DISPLAY && ' · '}
+              {currentPoint.feels_like_c != null && currentPoint.precip_prob != null && ' · '}
-              {currentPoint.precip_prob != null && currentPoint.precip_prob >= MIN_PRECIP_DISPLAY && <>{Math.round(currentPoint.precip_prob)}% chance of rain</>}
+              {currentPoint.precip_prob != null && <>{Math.round(currentPoint.precip_prob)}% chance of rain</>}
             </span>
             {data.summary?.note && <span className="wx-summary-note">{data.summary.note}</span>}
           </div>