Improve text rendering by handling long words and centering text

Update emoji rendering to correctly handle long words and center text, and adjust the client-side preview to remove hashtags instead of emojis.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Event-Id: 1a295c79-6a41-4cf1-94cd-94aa3c4f96e6
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/JcM96XE

server/services/twemoji-parser.d.ts

@@ -0,0 +1,11 @@
+declare module 'twemoji-parser' {
+  export interface EmojiEntity {
+    text: string;
+    url: string;
+    indices: [number, number];
+    type: string;
+  }
+
+  export function parse(text: string, options?: { buildUrl?: (codePoint: string, assetType: string) => string }): EmojiEntity[];
+  export function toCodePoints(unicodeSurrogates: string): string[];
+}