feat(coding-agent): expose copyToClipboard for extensions

fixes #926

packages/coding-agent/src/index.ts

@@ -290,6 +290,8 @@ export {
 	Theme,
 	type ThemeColor,
 } from "./modes/interactive/theme/theme.js";
+// Clipboard utilities
+export { copyToClipboard } from "./utils/clipboard.js";
 export { parseFrontmatter, stripFrontmatter } from "./utils/frontmatter.js";
 // Shell utilities
 export { getShellConfig } from "./utils/shell.js";