Merge commit 'c4f47adb49663f24ee80d9174ab24431a8c165c0' into glitch-soc/merge-upstream

Too many conflicts to list, because of webpack → vite migration.

app/javascript/flavours/glitch/utils/environment.ts

@@ -1,7 +1,11 @@
 export function isDevelopment() {
-  return process.env.NODE_ENV === 'development';
+  if (typeof process !== 'undefined')
+    return process.env.NODE_ENV === 'development';
+  else return import.meta.env.DEV;
 }
 
 export function isProduction() {
-  return process.env.NODE_ENV === 'production';
+  if (typeof process !== 'undefined')
+    return process.env.NODE_ENV === 'production';
+  else return import.meta.env.PROD;
 }