feat: split admin dashboard, improve match ops, and player closed-match UX

Admin: add match/player overview sub-nav; refine settlement flow and league
match management UI; improve action button enabled/disabled styles; enhance
logo upload and outright odds sync.

API: expose matchPhase/bettingOpen for closed matches; league publish guards;
settlement preview with auto score save; outright team auto-sync.

Player: watermark for closed/settled states; keep match and bet details visible;
remove default login credentials.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/views/MediaLibrary.vue

@@ -381,10 +381,12 @@ async function doUpload() {
 .file-grid {
   display: grid;
   grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+  align-content: start;
   gap: 14px;
   overflow-y: auto;
   flex: 1;
   padding-right: 4px;
+  padding-bottom: 8px;
 }
 
 .file-card {
@@ -448,7 +450,6 @@ async function doUpload() {
   display: flex;
   flex-direction: column;
   gap: 4px;
-  flex: 1;
 }
 .card-filename {
   font-size: 12px;
@@ -526,6 +527,14 @@ async function doUpload() {
 }
 .muted { color: #333; }
 
+.file-grid::-webkit-scrollbar { width: 6px; }
+.file-grid::-webkit-scrollbar-track { background: transparent; }
+.file-grid::-webkit-scrollbar-thumb {
+  background: #2a2a2a;
+  border-radius: 3px;
+}
+.file-grid::-webkit-scrollbar-thumb:hover { background: #444; }
+
 /* ── Upload dialog ── */
 .dialog-overlay {
   position: fixed;