fix: rebuild athlete.json on every ingest; remove bincio-extract references from UI

site/src/components/AthleteView.svelte

@@ -130,7 +130,7 @@
         <MmpChart {athlete} {activities} />
       </div>
     {:else}
-      <p class="text-zinc-500 text-sm">No power data found. Make sure your activities include power meter data and re-run <code class="text-zinc-300">bincio extract</code>.</p>
+      <p class="text-zinc-500 text-sm">No power data found. Make sure your activities include power meter data.</p>
     {/if}
 
   <!-- Records tab -->

site/src/pages/athlete/index.astro

@@ -13,5 +13,5 @@ const handle = shards[0]?.handle ?? null;
     window.location.replace(base + 'u/' + handle + '/athlete/');
   </script>
 ) : (
-  <p>No data found. Run <code>bincio extract</code> first.</p>
+  <p>No data found. Upload activities to get started.</p>
 )}

site/src/pages/stats/index.astro

@@ -14,5 +14,5 @@ const handle = shards[0]?.handle ?? null;
     window.location.replace(base + 'u/' + handle + '/stats/');
   </script>
 ) : (
-  <p>No data found. Run <code>bincio extract</code> first.</p>
+  <p>No data found. Upload activities to get started.</p>
 )}