fix: emojis sent from web not rendering

app/containers/markdown/__snapshots__/Markdown.test.tsx.snap

@@ -715,7 +715,7 @@ exports[`Story Snapshots: Emoji should match snapshot 1`] = `
           }
         >
 
-          👍
+          👍️
         </Text>
       </Text>
     </Text>
@@ -1005,7 +1005,7 @@ exports[`Story Snapshots: Emoji should match snapshot 1`] = `
           ]
         }
       >
-        👍
+        👍️
       </Text>
       <View
         style={
@@ -7821,7 +7821,7 @@ exports[`Story Snapshots: Preview should match snapshot 1`] = `
     @rocket.cat @name1 @all @here @unknown #general #unknown
   </Text>
   <Text
-    accessibilityLabel="Testing: 😃 👍 :marioparty:"
+    accessibilityLabel="Testing: 😃 👍️ :marioparty:"
     numberOfLines={1}
     style={
       [
@@ -7842,9 +7842,9 @@ exports[`Story Snapshots: Preview should match snapshot 1`] = `
         },
       ]
     }
-    testID="markdown-preview-Testing: 😃 👍 :marioparty:"
+    testID="markdown-preview-Testing: 😃 👍️ :marioparty:"
   >
-    Testing: 😃 👍 :marioparty:
+    Testing: 😃 👍️ :marioparty:
   </Text>
   <Text
     accessibilityLabel="Fallback from new md to old"

app/lib/constants/emojis/data.test.ts

@@ -0,0 +1,39 @@
+import { aliasesByEmojiName, emojisByCategory, shortnameToUnicodeMap } from './data';
+import { emojis } from './emojis';
+import { legacyShortnameToUnicodeMap } from './legacyShortnames';
+
+describe('emoji data', () => {
+	it('resolves every listed emoji to a unicode character', () => {
+		const unresolved = emojis.filter(name => !shortnameToUnicodeMap[`:${name}:`]);
+		expect(unresolved).toEqual([]);
+	});
+
+	it('lists every emoji exactly once', () => {
+		expect(emojis.length).toBe(new Set(emojis).size);
+	});
+
+	it('keys aliases by a listed emoji name', () => {
+		const listed = new Set(emojis);
+		expect(Object.keys(aliasesByEmojiName).filter(name => !listed.has(name))).toEqual([]);
+	});
+
+	it('resolves every alias to the same emoji as the name it belongs to', () => {
+		const mismatched = Object.keys(aliasesByEmojiName).filter(name =>
+			aliasesByEmojiName[name].some(alias => {
+				const unicode = shortnameToUnicodeMap[`:${alias}:`] ?? legacyShortnameToUnicodeMap[`:${alias}:`];
+				return !unicode;
+			})
+		);
+		expect(mismatched).toEqual([]);
+	});
+
+	it('has no category with an empty emoji list', () => {
+		expect(
+			Object.keys(emojisByCategory).filter(key => emojisByCategory[key as keyof typeof emojisByCategory].length === 0)
+		).toEqual([]);
+	});
+
+	it('keeps legacy shortnames out of the current map', () => {
+		expect(Object.keys(legacyShortnameToUnicodeMap).filter(key => key in shortnameToUnicodeMap)).toEqual([]);
+	});
+});