Revert "MM-56201, MM-56280: Suppress typing and emoji events (#25794)" (#26281)

This reverts commit f5ee5463e4.

webapp/platform/types/src/config.ts

@@ -121,7 +121,6 @@ export type ClientConfig = {
     FileLevel: string;
     FeatureFlagAppsEnabled: string;
     FeatureFlagCallsEnabled: string;
-    FeatureFlagWebSocketEventScope: string;
     ForgotPasswordLink: string;
     GiphySdkKey: string;
     GoogleDeveloperKey: string;

webapp/platform/types/src/posts.ts

@@ -66,7 +66,7 @@ export type PostMetadata = {
     emojis: CustomEmoji[];
     files: FileInfo[];
     images: Record<string, PostImage>;
-    reactions?: Reaction[];
+    reactions: Reaction[];
     priority?: PostPriorityMetadata;
     acknowledgements?: PostAcknowledgement[];
 };