Fix ESLint errors: replace ternary with conditional in onClick handlers

client/src/App.css

@@ -137,6 +137,118 @@
   color: #999;
 }
 
+.group-section {
+  margin-bottom: 2rem;
+  background: #fafafa;
+  border-radius: 10px;
+  padding: 1rem;
+}
+
+.group-header {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+  padding: 1rem;
+  background: white;
+  border-radius: 8px;
+  cursor: pointer;
+  transition: background 0.2s;
+  border: 1px solid #e0e0e0;
+  margin-bottom: 1rem;
+}
+
+.group-header:hover {
+  background: #f9f9f9;
+}
+
+.group-header h3 {
+  font-size: 1.1rem;
+  margin: 0;
+  color: #333;
+}
+
+.group-toggle {
+  font-size: 0.9rem;
+  color: #667eea;
+  min-width: 15px;
+}
+
+.group-stats {
+  display: flex;
+  gap: 1.5rem;
+  margin-left: auto;
+  font-size: 0.85rem;
+}
+
+.group-stat {
+  background: #f0f0f0;
+  padding: 0.4rem 0.8rem;
+  border-radius: 6px;
+  color: #666;
+  font-weight: 500;
+}
+
+.edit-input {
+  padding: 0.5rem;
+  border: 1px solid #667eea;
+  border-radius: 6px;
+  font-size: 1.05rem;
+  width: 100%;
+  margin-bottom: 0.5rem;
+}
+
+.card-edit-form {
+  margin-top: 0.75rem;
+  padding-top: 0.75rem;
+  border-top: 1px solid #eee;
+}
+
+.edit-field {
+  margin-bottom: 0.5rem;
+}
+
+.edit-field label {
+  display: block;
+  font-size: 0.75rem;
+  color: #666;
+  margin-bottom: 0.25rem;
+  font-weight: 600;
+}
+
+.edit-field input {
+  width: 100%;
+  padding: 0.4rem 0.6rem;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  font-size: 0.9rem;
+}
+
+.card-actions {
+  display: flex;
+  gap: 0.5rem;
+  margin-top: 0.5rem;
+  justify-content: flex-end;
+}
+
+.btn-icon {
+  background: none;
+  border: none;
+  cursor: pointer;
+  font-size: 1rem;
+  padding: 0.25rem 0.5rem;
+  opacity: 0.6;
+  transition: opacity 0.2s;
+}
+
+.btn-icon:hover {
+  opacity: 1;
+}
+
+.btn-sm {
+  padding: 0.4rem 0.8rem;
+  font-size: 0.8rem;
+}
+
 .btn {
   padding: 0.75rem 1.5rem;
   border: none;