feat: add consolidated Übersicht (Overview) dashboard tab with real-time mini-cards

style.css

@@ -1268,3 +1268,172 @@ main {
         transform: translateY(0);
     }
 }
+
+/* ==========================================================================
+   Dashboard Overview Cards & Grid
+   ========================================================================== */
+.overview-grid {
+    display: grid;
+    grid-template-columns: repeat(2, 1fr);
+    gap: 16px;
+    margin-bottom: 24px;
+}
+
+@media (max-width: 620px) {
+    .overview-grid {
+        grid-template-columns: 1fr;
+    }
+}
+
+.overview-mini-card {
+    background: rgba(17, 22, 36, 0.45);
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    padding: 20px;
+    cursor: pointer;
+    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
+    display: flex;
+    flex-direction: column;
+    gap: 14px;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
+}
+
+.overview-mini-card:hover {
+    background: rgba(23, 29, 45, 0.65);
+    border-color: rgba(103, 232, 249, 0.3);
+    transform: translateY(-3px);
+    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.35), 0 0 15px rgba(103, 232, 249, 0.08);
+}
+
+.mini-card-head {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+}
+
+.mini-card-icon {
+    font-size: 1.3rem;
+}
+
+.mini-card-head h4 {
+    margin: 0;
+    font-size: 1.05rem;
+    font-weight: 700;
+    color: #fff;
+    letter-spacing: -0.01em;
+}
+
+.mini-card-body {
+    display: flex;
+    flex-direction: column;
+    gap: 8px;
+    font-size: 0.92rem;
+    color: var(--text);
+}
+
+.mini-status-text {
+    display: flex;
+    align-items: baseline;
+    gap: 6px;
+}
+
+.mini-status-total {
+    color: var(--dim);
+    font-size: 0.8rem;
+}
+
+.mini-status-sub {
+    font-size: 0.8rem;
+    color: var(--dim);
+    margin-top: 2px;
+}
+
+/* LEDs for Services */
+.mini-led-grid {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 6px;
+    margin-top: 6px;
+}
+
+.mini-led {
+    width: 9px;
+    height: 9px;
+    border-radius: 50%;
+    display: inline-block;
+    transition: transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.mini-led:hover {
+    transform: scale(1.35);
+}
+
+.mini-led-ok {
+    background-color: var(--ok);
+    box-shadow: 0 0 6px rgba(52, 211, 153, 0.4);
+}
+
+.mini-led-down {
+    background-color: var(--down);
+    box-shadow: 0 0 6px rgba(251, 113, 133, 0.4);
+}
+
+/* Disks Mini Rows */
+.mini-disk-row {
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+    margin-bottom: 2px;
+}
+
+.mini-disk-row:last-child {
+    margin-bottom: 0;
+}
+
+.mini-disk-row.is-error {
+    color: var(--down);
+    font-weight: 500;
+}
+
+.mini-disk-meta {
+    display: flex;
+    justify-content: space-between;
+    font-size: 0.82rem;
+}
+
+.mini-disk-meta strong {
+    color: #fff;
+    font-weight: 600;
+}
+
+/* Slim progress bars in Mini overview */
+.usage-bar.mini-bar {
+    height: 5px;
+    background: rgba(255, 255, 255, 0.05);
+    border-radius: 99px;
+    overflow: hidden;
+    position: relative;
+    width: 100%;
+}
+
+.usage-bar.mini-bar span {
+    display: block;
+    height: 100%;
+    border-radius: 99px;
+    transition: width 0.4s ease;
+}
+
+.usage-bar.mini-bar[data-level="ok"] span {
+    background-color: var(--ok);
+    box-shadow: 0 0 4px rgba(52, 211, 153, 0.3);
+}
+
+.usage-bar.mini-bar[data-level="warn"] span {
+    background-color: var(--warn);
+    box-shadow: 0 0 4px rgba(251, 191, 36, 0.3);
+}
+
+.usage-bar.mini-bar[data-level="danger"] span {
+    background-color: var(--down);
+    box-shadow: 0 0 4px rgba(251, 113, 133, 0.3);
+}