feat: release v2.0 - visual linker, instant edit, and ux improvements

static/css/components/memo.css

@@ -102,3 +102,78 @@
     color: white;
     transform: translateY(-1px);
 }
+
+/* Checkbox Visibility Enhancement */
+.memo-content input[type="checkbox"] {
+    appearance: none;
+    -webkit-appearance: none;
+    width: 1.15rem;
+    height: 1.15rem;
+    border: 2px solid rgba(255, 255, 255, 0.4);
+    border-radius: 4px;
+    background: rgba(30, 41, 59, 0.5);
+    cursor: pointer;
+    position: relative;
+    vertical-align: middle;
+    margin-right: 8px;
+    margin-top: -2px;
+    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+}
+
+.memo-content input[type="checkbox"]:checked {
+    background: var(--accent);
+    border-color: var(--accent);
+    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
+}
+
+.memo-content input[type="checkbox"]:checked::after {
+    content: '✓';
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    font-family: Arial, sans-serif;
+    transform: translate(-50%, -50%);
+    color: #0f172a;
+    font-size: 0.85rem;
+    font-weight: 900;
+}
+
+.memo-content input[type="checkbox"]:hover {
+    border-color: var(--accent);
+    background: rgba(56, 189, 248, 0.15);
+}
+
+/* 완료된 리스트 항목 스타일 */
+.memo-content li:has(input[type="checkbox"]:checked) {
+    color: var(--muted);
+    text-decoration: line-through;
+    opacity: 0.7;
+}
+
+.memo-content ul {
+    list-style-type: none;
+    padding-left: 5px;
+}
+
+.copy-id-btn:hover {
+    color: var(--accent) !important;
+    text-shadow: 0 0 8px rgba(56, 189, 248, 0.5);
+    transform: scale(1.1);
+}
+
+/* 💡 시각적 연결 모드 스타일 */
+body.linker-active {
+    cursor: crosshair;
+}
+
+body.linker-active .copy-id-btn {
+    color: var(--accent) !important;
+    animation: pulse-border 1.5s infinite;
+    opacity: 1 !important;
+}
+
+@keyframes pulse-border {
+    0% { transform: scale(1); text-shadow: 0 0 0px var(--accent); }
+    50% { transform: scale(1.2); text-shadow: 0 0 10px var(--accent); }
+    100% { transform: scale(1); text-shadow: 0 0 0px var(--accent); }
+}