Refine users table and reconnect handling

server/lib/snapshot.ts

@@ -11,7 +11,12 @@ export async function getDashboardSnapshot(
   const state = await store.read();
   const previewConfig = render3proxyConfig(state, runtimePaths);
   const traffic = await readObservedTraffic(runtimePaths, state.userRecords);
-  const observedUsers = deriveObservedUsers(state.userRecords, traffic.userBytesByName, traffic.recentUsers);
+  const observedUsers = deriveObservedUsers(
+    state.userRecords,
+    traffic.userBytesByName,
+    traffic.lastSeenByName,
+    traffic.recentUsers,
+  );
   const observed: ObservedRuntimeState = {
     totalBytes: traffic.totalBytes,
     liveConnections: traffic.liveConnections,
@@ -26,14 +31,17 @@ export async function getDashboardSnapshot(
 function deriveObservedUsers(
   users: ProxyUserRecord[],
   userBytesByName: Map<string, number>,
+  lastSeenByName: Map<string, string | null>,
   recentUsers: Set<string>,
 ): ProxyUserRecord[] {
   return users.map((user) => {
     const usedBytes = userBytesByName.get(user.username) ?? 0;
+    const lastSeenAt = lastSeenByName.get(user.username) ?? null;
 
     if (user.paused) {
       return {
         ...user,
+        lastSeenAt,
         usedBytes,
         status: 'idle',
       };
@@ -42,6 +50,7 @@ function deriveObservedUsers(
     if (user.quotaBytes !== null && usedBytes >= user.quotaBytes) {
       return {
         ...user,
+        lastSeenAt,
         usedBytes,
         status: 'fail',
       };
@@ -50,6 +59,7 @@ function deriveObservedUsers(
     if (user.quotaBytes !== null && user.quotaBytes > 0 && usedBytes / user.quotaBytes >= 0.8) {
       return {
         ...user,
+        lastSeenAt,
         usedBytes,
         status: recentUsers.has(user.username) ? 'live' : 'warn',
       };
@@ -57,6 +67,7 @@ function deriveObservedUsers(
 
     return {
       ...user,
+      lastSeenAt,
       usedBytes,
       status: recentUsers.has(user.username) ? 'live' : 'idle',
     };

server/lib/traffic.ts

@@ -14,6 +14,7 @@ export interface ObservedTraffic {
   activeUsers: number;
   daily: DailyTrafficBucket[];
   userBytesByName: Map<string, number>;
+  lastSeenByName: Map<string, string | null>;
   recentUsers: Set<string>;
 }
 
@@ -34,6 +35,7 @@ export async function readObservedTraffic(
   const history = buildHistoryDays(historyStart, HISTORY_DAYS);
   const dailyTotals = new Map(history.map((entry) => [entry.key, 0]));
   const userBytesByName = new Map(users.map((user) => [user.username, 0]));
+  const lastSeenByName = new Map<string, string | null>(users.map((user) => [user.username, null]));
   const recentUsers = new Set<string>();
   let liveConnections = 0;
 
@@ -47,6 +49,13 @@ export async function readObservedTraffic(
       userBytesByName.set(record.username, (userBytesByName.get(record.username) ?? 0) + record.bytes);
     }
 
+    if (lastSeenByName.has(record.username)) {
+      const currentLastSeen = lastSeenByName.get(record.username);
+      if (!currentLastSeen || record.timestamp.toISOString() > currentLastSeen) {
+        lastSeenByName.set(record.username, record.timestamp.toISOString());
+      }
+    }
+
     const ageMs = now.getTime() - record.timestamp.getTime();
     if (ageMs >= 0 && ageMs <= RECENT_WINDOW_MS) {
       recentUsers.add(record.username);
@@ -76,6 +85,7 @@ export async function readObservedTraffic(
     activeUsers,
     daily,
     userBytesByName,
+    lastSeenByName,
     recentUsers,
   };
 }