Simplify the score module and page: dedup builders, consolidate metric metadata (#209)

Backend (scoring.py):
- Fold the parallel WEIGHTS/METRIC_LABELS/DIRECTION_WORDS/TEMP_DIR_METRICS maps
  into one METRICS descriptor so a scored metric is defined in one place.
- Share one _build_entry between the seasonal and annual paths.
- Add _freq_for so the annual entry reads the wet-day / heat-stress-day share
  directly instead of re-running the full precip_divergence just for it.
- Drop unconsumed payload: per-q v6/pct and the overall bias.
- Drop _slice's dead 'annual' branch; derive SLICES from SEASONS.

Frontend (score.js):
- One scoreCell() and signedPts() helper for the four score-cell sites and the
  two signed-points chips; reuse .section-title / .table-wrap instead of cloning.

Behavior-preserving (identical scores); bumps the score cache version.

static/score.js

@@ -14,7 +14,20 @@ const SEASON_NAMES = { djf: "Winter", mam: "Spring", jja: "Summer", son: "Fall"
 const SEASON_ORDER = ["djf", "mam", "jja", "son"];
 
 const tintColor = (cls) => TIER_COLORS[cls] || "";
-const tintClass = (cls) => (cls ? `t-${cls}` : "t-none");
+const tintClass = (cls) => `t-${cls}`;
+
+// A signed-points chip, colored up (▲) or down (▼): "+3" / "-2".
+const signedPts = (d, suffix = "") =>
+  `<span class="pq-d ${d >= 0 ? "pq-up" : "pq-down"}">${d >= 0 ? "+" : ""}${d}${suffix}</span>`;
+
+// One tinted score cell (an em-dash when the entry has no score). `strong` bolds
+// the number for an Overall row/column; the tint + hover title come from the entry.
+function scoreCell(entry, strong = false) {
+  if (!entry || entry.score == null) return `<td class="t-none">—</td>`;
+  const title = entry.label ? `${entry.label}: ${entry.grade}` : entry.grade;
+  const num = strong ? `<strong>${entry.score}</strong>` : `${entry.score}`;
+  return `<td class="${tintClass(entry.class)}" title="${esc(title)}">${num}</td>`;
+}
 
 let selected = null;   // {lat, lon}
 let lastData = null;   // most recent /score response, for repainting on a unit switch
@@ -101,7 +114,7 @@ function render(data) {
   // ---- hero: the overall annual score ----
   scoreHead.innerHTML = `
     <div class="score-hero" style="--cat:${tintColor(ov.class)}">
-      <p class="score-eyebrow">Climate-shift score · ${esc(place)}</p>
+      <p class="section-title score-eyebrow">Climate-shift score · ${esc(place)}</p>
       <div class="score-hero-row">
         <span class="score-num">${ov.score}</span>
         <div class="score-hero-label">
@@ -122,12 +135,8 @@ function render(data) {
     `<th>${shortLabel(k)}</th>`).join("")}</tr>`;
   const seasonRows = SEASON_ORDER.map((sk) => {
     const sl = s.slices[sk];
-    const oc = sl.overall;
+    const cells = METRIC_ORDER.map((k) => scoreCell(sl.metrics[k])).join("");
-    const overallCell = oc
+    return `<tr><th>${SEASON_NAMES[sk]}</th>${scoreCell(sl.overall, true)}${cells}</tr>`;
-      ? `<td class="${tintClass(oc.class)}"><strong>${oc.score}</strong></td>`
-      : `<td class="t-none">—</td>`;
-    const cells = METRIC_ORDER.map((k) => seasonCell(sl.metrics[k])).join("");
-    return `<tr><th>${SEASON_NAMES[sk]}</th>${overallCell}${cells}</tr>`;
   }).join("");
 
   scoreBody.innerHTML = `
@@ -135,7 +144,7 @@ function render(data) {
     ${wbNote}
     <section class="score-section">
       <p class="section-title">By season</p>
-      <div class="score-table-wrap"><table class="score-table season-table">
+      <div class="table-wrap"><table class="score-table season-table">
         <thead>${seasonHead}</thead><tbody>${seasonRows}</tbody></table></div>
     </section>
     <button type="button" class="summary-toggle" aria-expanded="false" aria-controls="score-summary">
@@ -155,7 +164,7 @@ function wetbulbNote(m, baseYrs) {
   }
   const thr = fmtTemp(m.freq.threshold_f);
   const { f6, f45, d } = m.freq;
-  const delta = d ? ` <span class="pq-d ${d >= 0 ? "pq-up" : "pq-down"}">(${d >= 0 ? "+" : ""}${d} pts)</span>` : "";
+  const delta = d ? ` (${signedPts(d, " pts")})` : "";
   return `<p class="score-callout">${def}
     Heat-stress days (peak wet bulb ≥ ${esc(String(thr))}): <strong>${f6}%</strong> of recent days
     vs <strong>${f45}%</strong> across ${baseYrs}${delta}. The rest are normal.</p>`;
@@ -165,7 +174,6 @@ function wetbulbNote(m, baseYrs) {
 // their own lines (rather than crammed top-right), so a long grade like
 // "Extreme shift — windier" never clusters in the corner on a narrow card.
 function metricCard(m) {
-  if (!m) return "";
   if (m.score == null) {
     return `<section class="normal-card score-card">
       <h3>${esc(m.label)}</h3>
@@ -187,11 +195,6 @@ function scoreDetail(m) {
   return `~${Math.abs(m.bias).toFixed(0)} pts ${esc(m.direction)}`;
 }
 
-function seasonCell(m) {
-  if (!m || m.score == null) return `<td class="t-none">—</td>`;
-  return `<td class="${tintClass(m.class)}" title="${esc(m.label)}: ${esc(m.grade)}">${m.score}</td>`;
-}
-
 const shortLabel = (k) => ({ precip: "Precip", tmax: "High", tmin: "Low", feels: "Feels",
   humid: "Humid", wetbulb: "Wet bulb", wind: "Wind", gust: "Gust" })[k] || k;
 
@@ -220,22 +223,14 @@ function scoreTableHTML(s) {
   const head = `<tr><th>Metric</th>${slices.map((sk) =>
     `<th>${sk === "annual" ? "Annual" : SEASON_NAMES[sk]}</th>`).join("")}</tr>`;
   const rows = METRIC_ORDER.map((k) => {
-    const cells = slices.map((sk) => {
+    const cells = slices.map((sk) => scoreCell(s.slices[sk].metrics[k])).join("");
-      const m = s.slices[sk].metrics[k];
-      if (!m || m.score == null) return `<td class="t-none">—</td>`;
-      return `<td class="${tintClass(m.class)}" title="${esc(m.grade)}">${m.score}</td>`;
-    }).join("");
     const label = s.slices.annual.metrics[k]?.label || k;
     return `<tr><th>${esc(label)}</th>${cells}</tr>`;
   }).join("");
-  const overallCells = slices.map((sk) => {
+  const overallCells = slices.map((sk) => scoreCell(s.slices[sk].overall, true)).join("");
-    const o = s.slices[sk].overall;
-    if (!o) return `<td class="t-none">—</td>`;
-    return `<td class="${tintClass(o.class)}"><strong>${o.score}</strong></td>`;
-  }).join("");
   const overallRow = `<tr class="score-table-overall"><th>Overall</th>${overallCells}</tr>`;
   return `<p class="section-title">All scores</p>
-    <div class="score-table-wrap"><table class="score-table">
+    <div class="table-wrap"><table class="score-table">
       <thead>${head}</thead><tbody>${rows}${overallRow}</tbody></table></div>`;
 }
 
@@ -246,14 +241,13 @@ function perQTableHTML(annual) {
     .map((k) => annual.metrics[k])
     .filter((m) => m && m.score != null && m.per_q && m.per_q.length)
     .map((m) => {
-      const cells = m.per_q.map((q) =>
+      const cells = m.per_q.map((q) => `<td>p${q.q}: ${signedPts(q.d)}</td>`).join("");
-        `<td>p${q.q}: <span class="pq-d ${q.d >= 0 ? "pq-up" : "pq-down"}">${q.d >= 0 ? "+" : ""}${q.d}</span></td>`).join("");
       return `<tr><th>${esc(m.label)}</th>${cells}</tr>`;
     }).join("");
   if (!rows) return "";
   return `<p class="section-title">Shift by percentile band</p>
     <p class="score-note">The mean shift at each percentile band, averaged across all four seasons (percentile points; ▲ higher / ▼ lower than the seasonal norm).</p>
-    <div class="score-table-wrap"><table class="score-table pq-table"><tbody>${rows}</tbody></table></div>`;
+    <div class="table-wrap"><table class="score-table pq-table"><tbody>${rows}</tbody></table></div>`;
 }
 
 // Mirror of shared.js initSeasonExpand: flip [hidden] + aria-expanded.

static/style.css

@@ -1712,10 +1712,7 @@ td.rec-date { color: var(--muted); font-size: 13px; }
   background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
   padding: 18px 20px; margin: 4px 0 18px;
 }
-.score-eyebrow {
+.score-eyebrow { margin: 0 0 8px; }   /* else styled by .section-title */
-  font-size: 12px; text-transform: uppercase; letter-spacing: .05em;
-  color: var(--muted); margin: 0 0 8px;
-}
 .score-hero-row { display: flex; align-items: center; gap: 16px; }
 .score-num {
   font-size: 52px; font-weight: 800; line-height: 1;
@@ -1769,7 +1766,7 @@ td.rec-date { color: var(--muted); font-size: 13px; }
 .score-sentences { margin: 8px 0 18px; padding-left: 20px; }
 .score-sentences li { font-size: 14px; line-height: 1.5; margin-bottom: 8px; color: var(--text); }
 
-.score-table-wrap { overflow-x: auto; margin: 8px 0 20px; }
+#score-body .table-wrap { margin: 8px 0 20px; }   /* .table-wrap supplies overflow-x */
 .score-table { border-collapse: collapse; font-size: 13px; }
 .score-table th, .score-table td {
   padding: 6px 10px; border-bottom: 1px solid var(--border); text-align: center; white-space: nowrap;