feat: collapse mobile note after first backfill

koc-portal/app/globals.css

@@ -1050,6 +1050,11 @@ footer {
   padding: 34px 38px;
 }
 
+.mobile-note-summary,
+.mobile-note-collapse-trigger {
+  display: none;
+}
+
 .note-document-meta {
   display: flex;
   gap: 8px;
@@ -1810,6 +1815,64 @@ footer {
     border-radius: 16px;
   }
 
+  .note-document.mobile-collapsed {
+    padding: 16px;
+  }
+
+  .note-document.mobile-collapsed .note-document-content {
+    display: none;
+  }
+
+  .note-document.mobile-collapsed .mobile-note-summary {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 14px;
+  }
+
+  .mobile-note-summary > div {
+    display: grid;
+    min-width: 0;
+    gap: 4px;
+  }
+
+  .mobile-note-summary span {
+    color: var(--green);
+    font-size: 9px;
+    font-weight: 750;
+  }
+
+  .mobile-note-summary strong {
+    overflow: hidden;
+    color: var(--ink);
+    font-size: 13px;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .mobile-note-summary small {
+    color: #899590;
+    font-size: 8px;
+  }
+
+  .mobile-note-summary button,
+  .mobile-note-collapse-trigger {
+    flex: 0 0 auto;
+    min-height: 34px;
+    padding: 0 12px;
+    border: 1px solid #cfe1d9;
+    border-radius: 9px;
+    color: var(--green-deep);
+    background: #f2f8f5;
+    font-size: 9px;
+    font-weight: 700;
+  }
+
+  .mobile-note-collapse-trigger {
+    display: block;
+    margin: 14px 0 0 auto;
+  }
+
   .note-document h1 {
     font-size: 28px;
   }