feat: since timer

src/app/tools/session/page.tsx

@@ -249,6 +249,7 @@ export default function Page() {
                             (draft as SessionTracking).player = {
                               id: player.account_id,
                               region: player.region,
+                              since: Date.now(),
                             };
 
                             input.current.value = player.nickname;
@@ -268,7 +269,8 @@ export default function Page() {
       )}
 
       {session.tracking && (
-        <Flex gap="4" align="center" justify="center" mt="2">
+        <Flex mt="2" mb="2" direction="column" align="center" gap="2">
+          <Flex gap="4" align="center" justify="center">
             <Heading size="5">Tracking {accountInfo?.nickname}</Heading>
             <Button
               color="red"
@@ -282,6 +284,11 @@ export default function Page() {
               Stop
             </Button>
           </Flex>
+
+          <Text color="gray">
+            Since {new Date(session.player.since).toLocaleString()}
+          </Text>
+        </Flex>
       )}
 
       {session.tracking && tankStatsB && tankStatsB.length > 0 && (

src/stores/session.ts

@@ -11,6 +11,7 @@ export interface SessionTracking extends SessionBase {
   player: {
     id: number;
     region: Region;
+    since: number;
   };
 }