Larger sales feed text, fix timezone offset in relative times

- Bump sales feed font sizes for better readability
- Append Z to server timestamps so browser correctly treats them as UTC

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

static/index.html

@@ -250,26 +250,26 @@
         /* ===== SALES FEED ===== */
         .sales-feed {
             grid-column: 1 / -1; max-height: 120px; overflow-y: auto;
-            border-radius: 8px; padding: 6px 10px;
+            border-radius: 8px; padding: 8px 12px;
             background: var(--bg-card); border: 1px solid var(--border);
-            font-size: 0.72rem;
+            font-size: 0.85rem;
         }
         .sales-feed h4 {
-            font-size: 0.63rem; font-weight: 800; color: var(--primary);
+            font-size: 0.72rem; font-weight: 800; color: var(--primary);
             margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.3px;
         }
         .sales-feed-empty { color: var(--text-dim); font-style: italic; }
         .sales-feed-item {
             display: flex; align-items: center; gap: 8px;
-            padding: 3px 0; border-bottom: 1px solid var(--border);
+            padding: 4px 0; border-bottom: 1px solid var(--border);
             animation: feedSlideIn 0.3s ease-out;
         }
         .sales-feed-item:last-child { border-bottom: none; }
-        .sales-feed-icon { font-size: 0.85rem; flex-shrink: 0; }
-        .sales-feed-sdr { font-weight: 700; color: var(--primary); }
+        .sales-feed-icon { font-size: 1rem; flex-shrink: 0; }
+        .sales-feed-sdr { font-weight: 700; color: var(--primary); font-size: 0.88rem; }
         [data-theme="dark"] .sales-feed-sdr { color: var(--lilac-300); }
-        .sales-feed-case { color: var(--text-muted); }
-        .sales-feed-time { margin-left: auto; color: var(--text-dim); font-size: 0.65rem; white-space: nowrap; }
+        .sales-feed-case { color: var(--text-muted); font-size: 0.85rem; }
+        .sales-feed-time { margin-left: auto; color: var(--text-dim); font-size: 0.75rem; white-space: nowrap; }
         @keyframes feedSlideIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
 
         /* ===== ACHIEVERS BANNER ===== */
@@ -652,7 +652,7 @@
 
         // ===== SALES FEED =====
         let salesFeedData = [];
-        function relativeTime(ts){const d=new Date(ts),now=new Date(),s=Math.round((now-d)/1000);if(s<60)return'just now';if(s<3600)return Math.floor(s/60)+'m ago';if(s<86400)return Math.floor(s/3600)+'h ago';return Math.floor(s/86400)+'d ago';}
+        function relativeTime(ts){const d=new Date(ts.endsWith('Z')?ts:ts+'Z'),now=new Date(),s=Math.round((now-d)/1000);if(s<60)return'just now';if(s<3600)return Math.floor(s/60)+'m ago';if(s<86400)return Math.floor(s/3600)+'h ago';return Math.floor(s/86400)+'d ago';}
         async function fetchSalesFeed(){try{let u='/api/sales-feed?limit=20';if(currentMonth)u+=`&month=${encodeURIComponent(currentMonth)}`;const r=await fetch(u);if(r.ok)salesFeedData=await r.json();}catch(e){}}
         function renderSalesFeed(){
             const el=document.getElementById('salesFeed');if(!el)return;