Fix NerdCorner: pass all activities, not only those with power data

site/src/components/AthleteView.svelte

@@ -19,6 +19,7 @@
 
   let athlete: AthleteJson | null = null;
   let activities:    ActivitySummary[] = [];
+  let allActivities: ActivitySummary[] = [];
   let loading = true;
   let error: string | null = null;
   let drawerOpen = false;
@@ -119,7 +120,8 @@
         } catch { /* ignore */ }
       }
       athlete = resolvedAthlete;
-      activities = index.activities.filter(a => a.mmp && !isUnlisted(a.privacy));
+      allActivities = index.activities.filter(a => !isUnlisted(a.privacy));
+      activities    = allActivities.filter(a => a.mmp);
     } catch (e: any) {
       error = e.message;
     } finally {
@@ -337,7 +339,7 @@
   {:else if activeTab === 'nerd'}
     <div class="bg-zinc-900 rounded-xl p-4 border border-zinc-800">
       <h3 class="text-sm font-medium text-zinc-400 uppercase tracking-wide mb-4">Year over year</h3>
-      <NerdCorner {activities} />
+      <NerdCorner activities={allActivities} />
     </div>
 
   <!-- Explore tab -->