Add emoji rendering to improve post preview accuracy

Install `twemoji` and implement `emojiUtils.ts` to parse and render emojis correctly in the post preview, ensuring consistency with actual published content.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Event-Id: 605c7efc-6cfc-498b-bf39-42e925354f36
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/JcM96XE

package-lock.json

@@ -86,6 +86,7 @@
         "tailwind-merge": "^2.6.0",
         "tailwindcss-animate": "^1.0.7",
         "tw-animate-css": "^1.2.5",
+        "twemoji": "^14.0.2",
         "twemoji-parser": "^14.0.0",
         "vaul": "^1.1.2",
         "wouter": "^3.3.5",
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+      "license": "MIT",
+      "dependencies": {
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+        "jsonfile": "^4.0.0",
+        "universalify": "^0.1.0"
+      },
+      "engines": {
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+      "optionalDependencies": {
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@@ -6325,6 +6348,18 @@
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+    "node_modules/jsonfile": {
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+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-5.0.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
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+      },
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
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@@ -8715,6 +8750,18 @@
         "url": "https://github.com/sponsors/Wombosvideo"
       }
     },
+    "node_modules/twemoji": {
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+      "resolved": "https://registry.npmjs.org/twemoji/-/twemoji-14.0.2.tgz",
+      "integrity": "sha512-BzOoXIe1QVdmsUmZ54xbEH+8AgtOKUiG53zO5vVP2iUu6h5u9lN15NcuS6te4OY96qx0H7JK9vjjl9WQbkTRuA==",
+      "license": "MIT",
+      "dependencies": {
+        "fs-extra": "^8.0.1",
+        "jsonfile": "^5.0.0",
+        "twemoji-parser": "14.0.0",
+        "universalify": "^0.1.2"
+      }
+    },
     "node_modules/twemoji-parser": {
       "version": "14.0.0",
       "resolved": "https://registry.npmjs.org/twemoji-parser/-/twemoji-parser-14.0.0.tgz",
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       "license": "MIT"
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+    "node_modules/universalify": {
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+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
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+      "license": "MIT",
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