feat: 新增收藏功能 - 图/表/合并图一键收藏，按原始大小保存到收藏区，可查看原图/下载/删除，点击编辑在新标签页加载配置再次制作

style.css

@@ -775,3 +775,208 @@ input[type="range"]::-moz-range-thumb {
     font-size: 0.74rem;
     white-space: nowrap;
 }
+
+/* ===== 收藏功能 ===== */
+.header-actions {
+    margin-top: 10px;
+}
+
+.btn-fav-outline {
+    background: #fff7ed;
+    color: #b45309;
+    border: 1px solid #fcd34d;
+    font-size: 0.88rem;
+}
+
+.btn-fav-outline:hover {
+    background: #ffedd5;
+    border-color: #f59e0b;
+}
+
+.btn-fav {
+    background: #f59e0b;
+    color: #fff;
+}
+
+.btn-fav:hover {
+    background: #d97706;
+}
+
+.btn-fav:disabled {
+    background: #fcd34d;
+    cursor: wait;
+    transform: none;
+}
+
+/* 收藏区弹窗 */
+.fav-modal {
+    display: none;
+    position: fixed;
+    inset: 0;
+    z-index: 9999;
+    background: rgba(15, 23, 42, 0.55);
+    backdrop-filter: blur(3px);
+    align-items: center;
+    justify-content: center;
+    padding: 24px;
+}
+
+.fav-modal-box {
+    width: min(1080px, 96vw);
+    max-height: 88vh;
+    background: #fff;
+    border-radius: 16px;
+    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+.fav-modal-head {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 16px 22px;
+    border-bottom: 1px solid var(--border);
+    background: #fffbeb;
+}
+
+.fav-modal-head h2 {
+    margin: 0;
+    font-size: 1.1rem;
+    color: #92400e;
+}
+
+.fav-modal-tip {
+    padding: 8px 22px;
+    font-size: 0.8rem;
+    color: var(--text-light);
+    background: #f8fafc;
+    border-bottom: 1px solid var(--border);
+}
+
+.fav-modal-tip #favCount {
+    font-weight: 700;
+    color: #b45309;
+}
+
+.fav-list {
+    padding: 18px 22px;
+    overflow-y: auto;
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
+    gap: 16px;
+    align-content: start;
+}
+
+.fav-empty {
+    grid-column: 1 / -1;
+    text-align: center;
+    padding: 60px 20px;
+    color: var(--text-light);
+    font-size: 0.95rem;
+}
+
+.fav-card {
+    border: 1px solid var(--border);
+    border-radius: 12px;
+    overflow: hidden;
+    background: #fff;
+    box-shadow: var(--shadow);
+    transition: box-shadow 0.2s, transform 0.2s;
+}
+
+.fav-card:hover {
+    box-shadow: var(--shadow-lg);
+    transform: translateY(-2px);
+}
+
+.fav-card-img {
+    position: relative;
+    height: 200px;
+    background: repeating-conic-gradient(#f1f5f9 0% 25%, #ffffff 0% 50%) 0 0 / 20px 20px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    overflow: hidden;
+    cursor: zoom-in;
+}
+
+.fav-card-img img {
+    max-width: 100%;
+    max-height: 100%;
+    object-fit: contain;
+}
+
+.fav-badge {
+    position: absolute;
+    top: 8px;
+    left: 8px;
+    background: rgba(79, 70, 229, 0.9);
+    color: #fff;
+    font-size: 0.72rem;
+    padding: 2px 8px;
+    border-radius: 10px;
+    font-weight: 600;
+}
+
+.fav-card-body {
+    padding: 10px 12px 12px;
+}
+
+.fav-card-title {
+    font-size: 0.9rem;
+    font-weight: 600;
+    color: var(--text);
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    margin-bottom: 4px;
+}
+
+.fav-card-meta {
+    font-size: 0.74rem;
+    color: var(--text-light);
+    margin-bottom: 8px;
+}
+
+.fav-card-actions {
+    display: flex;
+    gap: 6px;
+    align-items: center;
+}
+
+.fav-card-actions .btn-sm {
+    padding: 3px 10px;
+    font-size: 0.75rem;
+    flex: 0 0 auto;
+}
+
+.fav-card-actions .btn-remove {
+    margin-left: auto;
+}
+
+/* Toast 提示 */
+#appToast {
+    position: fixed;
+    bottom: 28px;
+    left: 50%;
+    transform: translateX(-50%) translateY(20px);
+    background: rgba(17, 24, 39, 0.92);
+    color: #fff;
+    padding: 10px 20px;
+    border-radius: 10px;
+    font-size: 0.88rem;
+    z-index: 10000;
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity 0.25s, transform 0.25s;
+    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
+    max-width: 80vw;
+    text-align: center;
+}
+
+#appToast.show {
+    opacity: 1;
+    transform: translateX(-50%) translateY(0);
+}