format: apply repo prettier (3.8.1) to the folded skills tree

963 markdown files reformatted with the repository's pinned prettier so
pnpm format:check covers the folded tree like every other repo file.

The formatter's embedded-language pass also normalized code fences
(TS semicolons, closed HTML tags in examples, lowercased CSS hex colors,
one renumbered list that skipped an index). Alphanumeric token deltas vs
the fold commit were audited file-by-file; all are formatter-equivalent
markup normalizations plus the four sanitized skills.

packages/mosaic/framework/skills/ai-sdk/references/common-errors.md

@@ -225,7 +225,7 @@ export default function Page() {
     transport: new DefaultChatTransport({ api: '/api/chat' }),
   });
 
-  const handleSubmit = e => {
+  const handleSubmit = (e) => {
     e.preventDefault();
     sendMessage({ text: input });
     setInput('');
@@ -233,7 +233,7 @@ export default function Page() {
 
   return (
     <form onSubmit={handleSubmit}>
-      <input value={input} onChange={e => setInput(e.target.value)} />
+      <input value={input} onChange={(e) => setInput(e.target.value)} />
       <button type="submit">Send</button>
     </form>
   );
@@ -259,18 +259,14 @@ Typed tool parts also use different property names:
       case 'text':
         return <div key={`${message.id}-${i}`}>{part.text}</div>;
       case 'tool-invocation': // deprecated: use typed tool parts instead
-        return (
-          <pre key={`${message.id}-${i}`}>
-            {JSON.stringify(part.toolInvocation, null, 2)}
-          </pre>
-        );
+        return <pre key={`${message.id}-${i}`}>{JSON.stringify(part.toolInvocation, null, 2)}</pre>;
     }
   });
 }
 
 // ✅ Correct - using typed tool parts (recommended)
 {
-  message.parts.map(part => {
+  message.parts.map((part) => {
     switch (part.type) {
       case 'text':
         return part.text;
@@ -288,7 +284,7 @@ Typed tool parts also use different property names:
 import { isToolUIPart } from 'ai';
 
 {
-  message.parts.map(part => {
+  message.parts.map((part) => {
     if (part.type === 'text') {
       return part.text;
     }