keep client reconnecting after outage

src/App.svelte

@@ -20,6 +20,7 @@
   let authError = '';
   let authBusy = false;
   let connectionNotice = '';
+  let connectionCheckRunning = false;
   let realtimeState = 'DISCONNECTED';
   let realtimeSocket: WebSocket | undefined;
   let activityEvents: Array<{ event_id: string; event_type: string; occurred_at: string }> = [];
@@ -133,13 +134,16 @@
   }
 
   async function checkServer() {
+    if (connectionCheckRunning) return;
+    connectionCheckRunning = true;
     connectionState = 'CONNECTING';
-    const retryDelays = [0, 3000, 10000, 15000, 30000];
-    for (let attempt = 0; attempt < retryDelays.length; attempt += 1) {
-      if (retryDelays[attempt] > 0) {
+    let attempt = 0;
+    while (true) {
+      const delay = attempt === 0 ? 0 : attempt === 1 ? 3000 : attempt === 2 ? 10000 : attempt === 3 ? 15000 : 30000;
+      if (delay > 0) {
         connectionState = 'RECONNECTING';
-        connectionNotice = `Retry ${attempt + 1}/${retryDelays.length} in ${retryDelays[attempt] / 1000}s`;
-        await new Promise((resolve) => window.setTimeout(resolve, retryDelays[attempt]));
+        connectionNotice = `Retry ${attempt + 1} in ${delay / 1000}s`;
+        await new Promise((resolve) => window.setTimeout(resolve, delay));
       } else {
         connectionNotice = 'Connecting to server';
       }
@@ -152,18 +156,20 @@
           serverCompatibility = `Requires client ${info.minimum_client_version}–${info.maximum_client_version}`;
           connectionState = 'INCOMPATIBLE';
           connectionNotice = 'Client update required';
+          connectionCheckRunning = false;
           return;
         }
         serverCompatibility = info.minimum_client_version && info.maximum_client_version ? `${info.minimum_client_version}–${info.maximum_client_version}` : '';
         connectionState = 'CONNECTED';
         connectionNotice = '';
+        connectionCheckRunning = false;
         return;
       } catch {
+        connectionState = 'SERVER UNAVAILABLE';
         connectionNotice = 'Server unavailable';
       }
+      attempt += 1;
     }
-    connectionState = 'SERVER UNAVAILABLE';
-    connectionNotice = 'Reconnect attempts exhausted. Test connection to try again.';
   }
 
   async function login() {