Fix claims.

Use OID instead of email for microsoft identifier.
Fix PlayerCount route.
Add created date to user table.
Create spectator icon.

Shogi.UI/Pages/Home/GameBoard/GameboardPresentation.razor.css

@@ -1,9 +1,10 @@
 .game-board {
 	display: grid;
-	grid-template-areas: "board side-board";
-	grid-template-columns: 3fr minmax(10rem, 1fr);
+	grid-template-areas: "board side-board icons";
+	grid-template-columns: 3fr minmax(10rem, 1fr) auto;
 	gap: 0.5rem;
 	background-color: #444;
+	position: relative; /* For absolute positioned children. */
 }
 
 .board {
@@ -13,6 +14,9 @@
 .side-board {
 	grid-area: side-board;
 }
+.icons {
+	grid-area: icons;
+}
 
 .board {
 	position: relative;
@@ -110,3 +114,11 @@
 	.promote-prompt[data-visible="true"] {
 		display: block;
 	}
+
+.spectating {
+	position: absolute;
+	right: 0;
+	top: 0;
+	z-index: 100;
+	color: var(--contrast-color)
+}