Disable rageshake persistence if no logs would be submitted

This also delays the persistence until later in the app startup - this is fine for the reasons listed on the partner PR: https://github.com/matrix-org/matrix-react-sdk/pull/5767

Fixes https://github.com/vector-im/element-web/issues/16694

src/vector/index.ts

@@ -92,6 +92,7 @@ async function start() {
     // load init.ts async so that its code is not executed immediately and we can catch any exceptions
     const {
         rageshakePromise,
+        setupLogStorage,
         preparePlatform,
         loadOlm,
         loadConfig,
@@ -138,6 +139,9 @@ async function start() {
         await settled(loadConfigPromise); // wait for it to settle
         // keep initialising so that we can show any possible error with as many features (theme, i18n) as possible
 
+        // now that the config is ready, try to persist logs
+        const persistLogsPromise = setupLogStorage();
+
         // Load language after loading config.json so that settingsDefaults.language can be applied
         const loadLanguagePromise = loadLanguage();
         // as quickly as we possibly can, set a default theme...
@@ -197,6 +201,11 @@ async function start() {
         await loadThemePromise;
         await loadLanguagePromise;
 
+        // We don't care if the log persistence made it through successfully, but we do want to
+        // make sure it had a chance to load before we move on. It's prepared much higher up in
+        // the process, making this the first time we check that it did something.
+        await settled(persistLogsPromise);
+
         // Finally, load the app. All of the other react-sdk imports are in this file which causes the skinner to
         // run on the components.
         await loadApp(fragparts.params);