refactor(docs): rename recent stats to heat and update dashboard rendering

apps/docs/islands/ProgressDashboard.tsx

@@ -46,7 +46,8 @@ interface Stats {
   }[];
   streak: number;
   queue: { date: string; due: number }[];
-  recent: { date: string; attempts: number; passes: number }[];
+  /** Every campaign day, zeros included; this page reads only the tail. */
+  heat: { date: string; attempts: number; passes: number }[];
 }
 
 function isStats(value: unknown): value is Stats {
@@ -60,7 +61,7 @@ function isStats(value: unknown): value is Stats {
     Array.isArray(v.phases) &&
     Array.isArray(v.gates) &&
     Array.isArray(v.queue) &&
-    Array.isArray(v.recent) &&
+    Array.isArray(v.heat) &&
     typeof v.streak === "number"
   );
 }
@@ -332,11 +333,14 @@ const GREENS = [
 ];
 
 function Recent({ stats }: { stats: Stats }) {
+  // heat spans the whole campaign, future days and all. The window wanted here
+  // is the seven days ending today, and campaign.day is that day, 1-based.
+  const week = stats.heat.slice(Math.max(0, stats.campaign.day - 7), stats.campaign.day);
   return (
     <div style={card}>
       <div style={heading}>Last 7 days</div>
       <div style={{ display: "flex", gap: "0.4rem", flexWrap: "wrap" }}>
-        {stats.recent.map((r) => (
+        {week.map((r) => (
           <span
             key={r.date}
             title={`${r.date}: ${r.passes}/${r.attempts} passed`}