feat(hackathons): show registered project count per hackathon

app/globals.css

@@ -40,8 +40,16 @@
   --font-mono: var(--font-jetbrains-mono);
 }
 
-* {
-  border-color: var(--border);
+/* Default border color for every element. MUST stay inside `@layer base`:
+   Tailwind 4 emits border-color utilities into `@layer utilities`, and
+   unlayered CSS outranks every layer — so an unlayered `*` rule here silently
+   overrode `border-bitcoin/30`, `border-success/40`, `border-border-strong`
+   and every other accent border in the app. Inside `base` it only supersedes
+   preflight's `border: 0 solid` (currentColor) default, and any utility wins. */
+@layer base {
+  * {
+    border-color: var(--border);
+  }
 }
 
 html {

app/hackathons/HackathonTimeline.tsx

@@ -10,6 +10,7 @@ import {
   ChevronRight,
   Clock,
   Flame,
+  FolderGit2,
   Gauge,
   Layers,
   Radio,
@@ -40,8 +41,32 @@ export type TimelineHackathon = {
   inscriptionOpen: boolean;
   countdown: string | null;
   sponsors: { name: string; logo: string }[];
+  /** Projects registered for this hackathon — curated + community submissions,
+   *  deduped the same way the detail page's list is. `null` when the relay
+   *  snapshot came back empty, i.e. the count is unknown rather than zero. */
+  projectCount: number | null;
 };
 
+/** "Sin proyectos" / "1 proyecto" / "N proyectos", or `null` when unknown —
+ *  callers render nothing in that case rather than claiming a number. */
+function projectCountLabel(count: number | null): string | null {
+  if (count === null) return null;
+  if (count === 0) return "Sin proyectos";
+  return `${count} ${count === 1 ? "proyecto" : "proyectos"}`;
+}
+
+/** Tooltip body for the project-count chip. Spanish agreement follows the
+ *  count, so the singular case reads "1 proyecto anotado … para verlo". */
+function projectCountTooltip(h: TimelineHackathon): string {
+  const n = h.projectCount ?? 0;
+  if (n > 0) {
+    return `${projectCountLabel(n)} ${n === 1 ? "anotado" : "anotados"} en este hackatón — abrí el detalle para ${n === 1 ? "verlo" : "verlos"}.`;
+  }
+  return h.status === "closed"
+    ? "No se anotó ningún proyecto en esta edición."
+    : "Todavía no se anotó ningún proyecto. Podés ser el primero.";
+}
+
 const STATUS_META: Record<
   TimelineHackathon["status"],
   { label: string; dot: string; text: string; ring: string }
@@ -162,13 +187,18 @@ export default function HackathonTimeline({
               {items.map((h, i) => {
                 const meta = STATUS_META[h.status];
                 const selected = i === index;
+                const countLabel = projectCountLabel(h.projectCount);
                 return (
                   <button
                     key={h.id}
                     type="button"
                     onClick={() => goTo(i)}
                     aria-current={selected ? "true" : undefined}
-                    aria-label={`${h.name} — ${meta.label}`}
+                    aria-label={
+                      countLabel
+                        ? `${h.name} — ${meta.label} — ${countLabel}`
+                        : `${h.name} — ${meta.label}`
+                    }
                     className="group relative flex flex-1 flex-col items-center gap-2 rounded-lg pt-[6px] outline-none focus-visible:ring-2 focus-visible:ring-cyan/60"
                   >
                     {/* Dot — nudged up to sit centered on the rail line above. */}
@@ -367,6 +397,7 @@ function PeekCard({
   onClick: () => void;
 }) {
   const meta = STATUS_META[h.status];
+  const countLabel = projectCountLabel(h.projectCount);
   return (
     <motion.button
       type="button"
@@ -407,6 +438,20 @@ function PeekCard({
         <div className="truncate text-[11px] font-mono uppercase tracking-wide text-foreground-muted">
           {h.focus}
         </div>
+        {countLabel && (
+          <div
+            className={cn(
+              // Deliberately not `text-foreground-subtle` even at zero: the peek
+              // card is already held at 0.78 opacity, which drags the subtle
+              // token under the AA contrast floor.
+              "mt-1.5 inline-flex items-center gap-1 text-[10px] font-mono uppercase tracking-wider text-foreground-muted",
+              side === "right" && "flex-row-reverse",
+            )}
+          >
+            <FolderGit2 className="h-3 w-3 shrink-0" />
+            <span className="tabular-nums">{countLabel}</span>
+          </div>
+        )}
       </div>
       <span
         className={cn(
@@ -434,18 +479,27 @@ function InfoChip({
   icon,
   label,
   tooltip,
+  strong = false,
 }: {
   icon: React.ReactNode;
   label: string;
   tooltip: React.ReactNode;
+  /** Pulls the chip forward (brighter text + border) — used for the project
+   *  count, the one figure on the card that changes as people submit. */
+  strong?: boolean;
 }) {
   return (
     <div className="group/chip relative">
       {/* A button so the detail is reachable by keyboard/touch (focus), not
        *  only by hover. The tooltip reveals on hover OR focus-within. */}
       <button
         type="button"
-        className="inline-flex items-center gap-1.5 rounded-lg border border-border bg-white/[0.03] px-2.5 py-1.5 text-[11px] font-mono font-semibold uppercase tracking-wider text-foreground-muted outline-none transition-colors hover:border-border-strong hover:text-foreground focus-visible:border-border-strong focus-visible:text-foreground focus-visible:ring-2 focus-visible:ring-cyan/60"
+        className={cn(
+          "inline-flex items-center gap-1.5 rounded-lg border bg-white/[0.03] px-2.5 py-1.5 text-[11px] font-mono font-semibold uppercase tracking-wider outline-none transition-colors hover:border-border-strong hover:text-foreground focus-visible:border-border-strong focus-visible:text-foreground focus-visible:ring-2 focus-visible:ring-cyan/60",
+          strong
+            ? "border-border-strong text-foreground"
+            : "border-border text-foreground-muted",
+        )}
       >
         <span className="text-foreground-subtle">{icon}</span>
         {label}
@@ -460,6 +514,7 @@ function InfoChip({
 function StageCard({ h }: { h: TimelineHackathon }) {
   const isActive = h.status === "active";
   const isClosed = h.status === "closed";
+  const countLabel = projectCountLabel(h.projectCount);
 
   const accent = isActive
     ? {
@@ -567,6 +622,14 @@ function StageCard({ h }: { h: TimelineHackathon }) {
               {!isActive && !isClosed && <Clock className="h-3.5 w-3.5" />}
               {accent.badgeLabel}
             </span>
+            {countLabel && (
+              <InfoChip
+                icon={<FolderGit2 className="h-3.5 w-3.5" />}
+                label={countLabel}
+                strong={(h.projectCount ?? 0) > 0}
+                tooltip={projectCountTooltip(h)}
+              />
+            )}
             <InfoChip
               icon={<Calendar className="h-3.5 w-3.5" />}
               label={

app/hackathons/[id]/page.tsx

@@ -30,10 +30,11 @@ import {
   getHackathon,
   hackathonSlug,
   hackathonStatus,
+  mergeWithSubmissions,
   primaryProjectPubkey,
   prizedProjects,
   programRules,
-  rankedProjects,
+  toHackathonSubmission,
   type HackathonSubmission,
   type Sponsor,
 } from "@/lib/hackathons";
@@ -257,21 +258,6 @@ function soldierRecipientLookup(
   return lookup;
 }
 
-type CachedHackathonSubmission = Awaited<
-  ReturnType<typeof getNostrHackathonSubmissions>
->[number];
-
-function fromCachedNostrSubmission(
-  project: CachedHackathonSubmission,
-): HackathonSubmission {
-  return {
-    ...project,
-    nostrAuthor: project.author,
-    nostrEventId: project.eventId,
-    nostrCreatedAt: project.eventCreatedAt,
-  };
-}
-
 function SponsorStrip({ sponsors }: { sponsors: Sponsor[] }) {
   if (sponsors.length === 0) return null;
   if (sponsors.length === 1) return <SponsorHero sponsor={sponsors[0]} />;
@@ -475,9 +461,6 @@ export default async function HackathonPage({
     votingPeriod?.status === "closed" && !!votingPeriod.results;
   const status = hackathonStatus(hackathon);
   const statusMeta = STATUS_META[status];
-  const projects = rankedProjects(id);
-  const total = projects.length;
-  const hasReports = projects.some((p) => p.report);
   const awards = prizedProjects(id);
   const prizePubkeys = [
     ...new Set(awards.map((a) => primaryProjectPubkey(a.project)).filter((pubkey): pubkey is string => !!pubkey)),
@@ -501,7 +484,11 @@ export default async function HackathonPage({
   const nostrSubmissions = attachProjectSlugs(
     cachedSubmissions,
     projectRegistry,
-  ).map(fromCachedNostrSubmission);
+  ).map(toHackathonSubmission);
+  // Count what the list below actually renders (curated + community, deduped),
+  // not just the curated slice — /hackathons advertises this same merged number,
+  // so a curated-only tab badge would contradict the card the user clicked.
+  const total = mergeWithSubmissions(id, nostrSubmissions).length;
   const prizeBadgeIssuerPubkey =
     status === "closed"
       ? await getCachedHackathonBadgePublisherPubkey().catch(() => "")

app/hackathons/page.tsx

@@ -1,4 +1,5 @@
 import type { Metadata } from "next";
+import { cacheTag } from "next/cache";
 import {
   Calendar,
   Zap,
@@ -14,7 +15,15 @@ import {
   hackathonSlug,
   hackathonStatus,
   isHackathonInscriptionOpen,
+  mergeWithSubmissions,
+  toHackathonSubmission,
+  type HackathonSubmission,
 } from "@/lib/hackathons";
+import {
+  getNostrSubmissionsSnapshot,
+  NOSTR_PROJECTS_TAG,
+  NOSTR_SUBMISSIONS_TAG,
+} from "@/lib/nostrCache";
 import { cn } from "@/lib/cn";
 import HackathonTimeline, {
   type TimelineHackathon,
@@ -75,7 +84,11 @@ function startsInLabel(startISO: string, now: Date): string | null {
  *  hackathon (active, else soonest upcoming, else the last one) and the
  *  fraction of the program that has already elapsed (0–100), so the rail can
  *  draw a "today" marker even between two hackathons. */
-function buildTimeline(now: Date): {
+function buildTimeline(
+  now: Date,
+  submissions: HackathonSubmission[],
+  submissionsKnown: boolean,
+): {
   items: TimelineHackathon[];
   initialIndex: number;
   todayPct: number;
@@ -86,6 +99,9 @@ function buildTimeline(now: Date): {
 
   const items: TimelineHackathon[] = ordered.map((h) => {
     const status = hackathonStatus(h, now);
+    // Same merge the detail page renders (curated + community, deduped by
+    // id/repo/name), so the number here matches the list one click away.
+    const merged = mergeWithSubmissions(h.id, submissions).length;
     // Sort dates to match hackathonStatus()/isHackathonInscriptionOpen(), which
     // normalize ordering — keeps every timeline calc on the same boundaries.
     const sortedDates = [...h.dates].sort((a, b) => a.date.localeCompare(b.date));
@@ -112,6 +128,11 @@ function buildTimeline(now: Date): {
       inscriptionOpen: isHackathonInscriptionOpen(h, now),
       countdown: status === "upcoming" && firstISO ? startsInLabel(firstISO, now) : null,
       sponsors: (h.sponsors ?? []).map((s) => ({ name: s.name, logo: s.logo })),
+      // A count of zero derived from an empty snapshot is not a fact — see
+      // `submissionsKnown` below. Report it as unknown so the UI stays silent
+      // instead of asserting nobody entered. A curated hackathon still has a
+      // real number to show, so only the all-zero case goes null.
+      projectCount: merged > 0 || submissionsKnown ? merged : null,
     };
   });
 
@@ -147,8 +168,25 @@ function buildTimeline(now: Date): {
 
 export default async function HackathonsPage() {
   "use cache";
+  // The per-hackathon counts below read the shared relay snapshot, so this
+  // page's entry has to expire with it. The snapshot's own "use cache" tags do
+  // propagate up into this one, but declaring them here keeps the page's
+  // invalidation contract visible and survives that helper being refactored.
+  cacheTag(NOSTR_PROJECTS_TAG);
+  cacheTag(NOSTR_SUBMISSIONS_TAG);
   const now = new Date();
-  const { items, initialIndex, todayPct } = buildTimeline(now);
+  const snapshot = await getNostrSubmissionsSnapshot();
+  const submissions = snapshot.projects.map(toHackathonSubmission);
+  // `buildSubmissionsSnapshot` swallows relay errors and returns an empty list,
+  // so "no projects" and "every relay timed out" look identical here. Unlike the
+  // detail page, this one has no client-side rescan to correct a bad read — so
+  // treat an empty snapshot as "unknown" rather than rendering "Sin proyectos".
+  const submissionsKnown = snapshot.projects.length > 0;
+  const { items, initialIndex, todayPct } = buildTimeline(
+    now,
+    submissions,
+    submissionsKnown,
+  );
 
   return (
     <>

lib/hackathons.ts

@@ -249,6 +249,32 @@ export type HackathonSubmission = HackathonProject & {
   nostrCreatedAt?: number;
 };
 
+/** Event provenance carried by any project parsed out of a Nostr event.
+ *  Both producers use these names — `lib/nostrCache.ts` (server, cached relay
+ *  snapshot) and `lib/userProjects.ts` (client scan). */
+export type NostrProjectProvenance = {
+  author: string;
+  eventId: string;
+  eventCreatedAt: number;
+};
+
+/**
+ * Re-labels a Nostr-sourced project's event provenance onto the
+ * `HackathonSubmission` fields `mergeWithSubmissions()` reads (it sorts
+ * community entries by `nostrCreatedAt`). Generic so extra fields the caller
+ * attached — e.g. the registry `slug` from `attachProjectSlugs` — survive.
+ */
+export function toHackathonSubmission<
+  T extends HackathonProject & NostrProjectProvenance,
+>(project: T): T & HackathonSubmission {
+  return {
+    ...project,
+    nostrAuthor: project.author,
+    nostrEventId: project.eventId,
+    nostrCreatedAt: project.eventCreatedAt,
+  };
+}
+
 export function comparableProjectName(name: string): string {
   return name
     .trim()