net: auto-reload on server version mismatch and announce connected version on welcome

client/public/version.js

@@ -1,5 +1,5 @@
 // Maintainer-controlled web client version.
 // Format: YYYY.MM.DD Rn (example: 2026.02.20 R2)
-window.CHGRID_WEB_VERSION = "2026.02.22 R164";
+window.CHGRID_WEB_VERSION = "2026.02.22 R165";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";

client/src/main.ts

@@ -201,6 +201,7 @@ let heartbeatNextPingId = -1;
 let heartbeatAwaitingPong = false;
 let reconnectInFlight = false;
 let activeServerInstanceId: string | null = null;
+let reloadScheduledForVersionMismatch = false;
 let audioLayers: AudioLayerState = {
   voice: true,
   item: true,
@@ -508,6 +509,9 @@ function toggleAudioLayer(layer: keyof AudioLayerState): void {
 
 /** Routes signaling transport status messages through chat buffer + status output. */
 function handleSignalingStatus(message: string): void {
+  if (message === 'Connected.') {
+    return;
+  }
   pushChatMessage(message);
 }
 
@@ -1221,16 +1225,35 @@ async function onSignalingMessage(message: IncomingMessage): Promise<void> {
     return;
   }
   let restartAnnouncement: string | null = null;
+  let connectedAnnouncement: string | null = null;
   if (message.type === 'welcome') {
     const incomingInstanceId = String(message.serverInfo?.instanceId ?? '').trim() || null;
     const incomingVersion = String(message.serverInfo?.version ?? '').trim() || 'unknown';
+    connectedAnnouncement = `Connected. Version ${incomingVersion}.`;
+    if (
+      !reloadScheduledForVersionMismatch &&
+      APP_VERSION &&
+      incomingVersion &&
+      incomingVersion !== 'unknown' &&
+      incomingVersion !== APP_VERSION
+    ) {
+      reloadScheduledForVersionMismatch = true;
+      pushChatMessage(`Server version ${incomingVersion} detected. Reloading client...`);
+      window.setTimeout(() => {
+        window.location.reload();
+      }, 50);
+      return;
+    }
     if (activeServerInstanceId && incomingInstanceId && activeServerInstanceId !== incomingInstanceId) {
-      restartAnnouncement = `Server restarted, version ${incomingVersion}.`;
+      restartAnnouncement = 'Server restarted.';
     }
     activeServerInstanceId = incomingInstanceId;
     startHeartbeat();
   }
   await onAppMessage(message);
+  if (connectedAnnouncement) {
+    pushChatMessage(connectedAnnouncement);
+  }
   if (restartAnnouncement) {
     pushChatMessage(restartAnnouncement);
     audio.sfxUiConfirm();

docs/protocol-notes.md

@@ -62,5 +62,6 @@ This is a behavior guide for packet semantics beyond raw schemas.
 - Client sends automatic heartbeat `ping` packets every 10 seconds while connected.
 - Heartbeat pings use negative `clientSentAt` ids and are internal (not user-visible ping status).
 - If a heartbeat `pong` is missed for one interval (10 seconds), client force-disconnects and reconnects.
-- After reconnect, if `welcome.serverInfo.instanceId` changed, client announces:
+- After reconnect, if `welcome.serverInfo.instanceId` changed, client announces `Server restarted.`
-  `Server restarted, version <version>.`
+- Client emits `Connected. Version <version>.` after each `welcome`.
+- If `welcome.serverInfo.version` differs from running client version, client auto-reloads.

docs/runtime-flow.md

@@ -9,6 +9,7 @@
 5. Client:
    - applies `welcome.worldConfig.gridSize` for authoritative grid bounds/rendering
    - records `welcome.serverInfo` (`instanceId`, `version`) for restart detection
+   - if `welcome.serverInfo.version` differs from running client version, auto-reloads the page
    - applies `welcome.uiDefinitions` for item menus/properties/options
    - sends initial `update_position`
    - sends initial `update_nickname`
@@ -48,7 +49,8 @@ Core incoming message effects:
 
 - While running, client sends heartbeat `ping` every 10 seconds.
 - If one heartbeat `pong` is missed (10-second interval), client auto-reconnects.
-- If reconnect lands on a different `welcome.serverInfo.instanceId`, client announces server restart/version.
+- If reconnect lands on a different `welcome.serverInfo.instanceId`, client announces server restart.
+- Connect/reconnect status message is emitted from `welcome` and includes server version.
 
 ## Disconnect/Cleanup