fix: restore overflow on sound cards + fix connectedSince uptime

- Restore overflow:hidden on html/body, sound-card, modal, admin items
- Only .now-playing and .np-name keep unbounded width (Last Played bubble)
- Fix Verbunden seit 0s: auto-set connectedSince when connection is ready
  but timestamp was not recorded (e.g. after redeploy)

web/src/styles.css

@@ -106,6 +106,7 @@
 
 html, body {
   height: 100%;
+  overflow: hidden;
   background: var(--bg-deep);
   color: var(--text-normal);
   font-family: var(--font);
@@ -376,6 +377,7 @@ input, select {
   border-radius: 16px;
   width: 340px;
   box-shadow: 0 20px 60px rgba(0,0,0,.4);
+  overflow: hidden;
   animation: slideUp .2s ease;
 }
 @keyframes slideUp {
@@ -969,6 +971,7 @@ input, select {
   transition: all var(--transition);
   border: 2px solid transparent;
   user-select: none;
+  overflow: hidden;
   aspect-ratio: 1;
   opacity: 0;
   animation: card-enter 350ms ease-out forwards;
@@ -1064,6 +1067,8 @@ input, select {
   color: var(--text-normal);
   z-index: 1;
   max-width: 100%;
+  overflow: hidden;
+  text-overflow: ellipsis;
   white-space: nowrap;
   padding: 0 4px;
 }
@@ -1689,6 +1694,8 @@ input, select {
   font-size: 14px;
   font-weight: 600;
   color: var(--text-normal);
+  overflow: hidden;
+  text-overflow: ellipsis;
   white-space: nowrap;
 }
 
@@ -1696,6 +1703,8 @@ input, select {
   margin-top: 3px;
   font-size: 11px;
   color: var(--text-faint);
+  overflow: hidden;
+  text-overflow: ellipsis;
   white-space: nowrap;
 }