Feature: Fremdprofil-Seite /profil/[handle] + klickbare Usernames im Leaderboard

UI-Teil zum Fremdprofil-Backend (2dfc770).

apps/admin/app/(authed)/profil/[handle]/page.tsx:
- Oeffentliche Profilseite: Avatar/Initiale, Handle, Bio, Punkte (gesamt +
  30 Tage) und aktive Tage (7-Tage-Streak).
- Sauberes NOT_FOUND-Handling fuer private/unbekannte Profile.
- Hinweis, dass Gesundheitsdaten immer privat bleiben.

dashboard.ts (clubLeaderboard):
- Liefert pro Eintrag einen handleSlug, aber NUR fuer profileVisible=true
  (sonst null -> kein toter Link).

hellfireclub/page.tsx:
- Leaderboard-Namen werden zu Links auf /profil/[handleSlug], wenn das
  Profil oeffentlich ist; sonst unveraenderter Text.

Verifiziert: Typecheck 3/3, 75 API-Tests + 10 Admin-Tests gruen.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/admin/app/(authed)/hellfireclub/page.tsx

@@ -436,7 +436,16 @@ export default function HellfireclubPage() {
                 <div key={entry.userKey} className="flex items-center gap-3 rounded-2xl bg-gray-50 p-3">
                   <div className="grid h-9 w-9 place-items-center rounded-full bg-gray-950 text-sm font-black text-white">{index + 1}</div>
                   <div className="min-w-0 flex-1">
-                    <p className="truncate text-sm font-black text-gray-950">{entry.name}</p>
+                    {entry.handleSlug ? (
+                      <Link
+                        href={`/profil/${entry.handleSlug}`}
+                        className="truncate text-sm font-black text-[#0F766E] underline-offset-2 hover:underline"
+                      >
+                        {entry.name}
+                      </Link>
+                    ) : (
+                      <p className="truncate text-sm font-black text-gray-950">{entry.name}</p>
+                    )}
                     <p className="text-xs font-bold text-gray-400">{entry.completed} Punkte-Einträge</p>
                   </div>
                   <div className="text-right">

apps/admin/app/(authed)/profil/[handle]/page.tsx

@@ -0,0 +1,113 @@
+"use client";
+
+import { FireIcon, SparklesIcon } from "@heroicons/react/24/outline";
+import { useParams } from "next/navigation";
+import { DataPageLayout } from "@/app/_components/data-page-layout";
+import { trpc } from "@/lib/trpc";
+
+export default function PublicProfilePage() {
+  const params = useParams<{ handle: string }>();
+  const handleSlug = decodeURIComponent(params.handle ?? "");
+
+  const profileQuery = trpc.users.publicProfileByHandle.useQuery(
+    { handle: handleSlug },
+    { retry: false },
+  );
+
+  if (profileQuery.isLoading) {
+    return (
+      <DataPageLayout title="Profil">
+        <p className="text-sm text-gray-500">Profil wird geladen …</p>
+      </DataPageLayout>
+    );
+  }
+
+  if (profileQuery.isError || !profileQuery.data) {
+    return (
+      <DataPageLayout title="Profil nicht gefunden">
+        <div className="rounded-xl border border-gray-200 bg-white p-6 text-sm text-gray-600">
+          Dieses Profil gibt es nicht oder es ist privat. Nur Mitglieder, die ihr
+          Profil öffentlich geschaltet haben, sind hier sichtbar.
+        </div>
+      </DataPageLayout>
+    );
+  }
+
+  const profile = profileQuery.data;
+  const initial = (profile.username ?? "?").charAt(0).toUpperCase();
+
+  return (
+    <DataPageLayout title={profile.handle ?? profile.username ?? "Profil"}>
+      <div className="space-y-4">
+        <div className="flex items-center gap-4 rounded-xl border border-gray-200 bg-white p-5">
+          {profile.image ? (
+            // eslint-disable-next-line @next/next/no-img-element
+            <img
+              src={profile.image}
+              alt={profile.username ?? "Avatar"}
+              className="h-16 w-16 rounded-full object-cover"
+            />
+          ) : (
+            <div className="flex h-16 w-16 items-center justify-center rounded-full bg-[#0F766E] text-xl font-bold text-white">
+              {initial}
+            </div>
+          )}
+          <div className="min-w-0">
+            <p className="truncate text-lg font-semibold text-gray-900">
+              {profile.username}
+              <span className="font-normal text-gray-400">#{profile.discriminator}</span>
+            </p>
+            {profile.bio ? (
+              <p className="mt-1 whitespace-pre-line text-sm text-gray-600">{profile.bio}</p>
+            ) : (
+              <p className="mt-1 text-sm text-gray-400">Keine Bio hinterlegt.</p>
+            )}
+          </div>
+        </div>
+
+        <div className="grid grid-cols-1 gap-3 sm:grid-cols-3">
+          <StatCard
+            icon={<FireIcon className="h-5 w-5 text-[#0F766E]" />}
+            label="Punkte gesamt"
+            value={profile.points.total.toLocaleString("de-DE")}
+          />
+          <StatCard
+            icon={<FireIcon className="h-5 w-5 text-[#0F766E]" />}
+            label="Punkte (30 Tage)"
+            value={profile.points.last30Days.toLocaleString("de-DE")}
+          />
+          <StatCard
+            icon={<SparklesIcon className="h-5 w-5 text-[#0F766E]" />}
+            label="Aktive Tage (7 Tage)"
+            value={`${profile.activeDaysLast7}/7`}
+          />
+        </div>
+
+        <p className="px-1 text-xs text-gray-400">
+          Gesundheitsdaten wie Gewicht, Kalorien und Ziele sind immer privat und
+          werden hier nie angezeigt.
+        </p>
+      </div>
+    </DataPageLayout>
+  );
+}
+
+function StatCard({
+  icon,
+  label,
+  value,
+}: {
+  icon: React.ReactNode;
+  label: string;
+  value: string;
+}) {
+  return (
+    <div className="rounded-xl border border-gray-200 bg-white p-4">
+      <div className="flex items-center gap-2 text-xs font-medium text-gray-500">
+        {icon}
+        {label}
+      </div>
+      <p className="mt-2 text-2xl font-bold text-gray-900">{value}</p>
+    </div>
+  );
+}

packages/api/src/trpc/routers/health/dashboard.ts

@@ -1,6 +1,7 @@
 import { schema } from "@hellth/db";
 import { and, eq, isNull } from "drizzle-orm";
 import { z } from "zod";
+import { handleToSlug } from "../../../lib/handle";
 import { platformProcedure, protectedProcedure, router } from "../../init";
 import {
   auditHealthMutation,