fix(packages/ui): use .then().catch() pattern for clipboard promises

OXLint requires each then() to return a value and prefers .catch()
over two-argument .then(onFulfilled, onRejected).

Co-Authored-By: Claude <noreply@anthropic.com>

Author: zrosenbauer

packages/ui/src/theme/components/shared/color.tsx

@@ -33,18 +33,19 @@ export function Color({ value, name }: ColorProps): React.ReactElement {
   }, [])
 
   const handleClick = useCallback(() => {
-    navigator.clipboard.writeText(value).then(
-      () => {
+    navigator.clipboard
+      .writeText(value)
+      .then(() => {
         if (resetTimerRef.current !== null) {
           clearTimeout(resetTimerRef.current)
         }
         setCopied(true)
         resetTimerRef.current = setTimeout(() => setCopied(false), 2000)
-      },
-      () => {
+        return null
+      })
+      .catch(() => {
         setCopied(false)
-      }
-    )
+      })
   }, [value])
 
   const nameEl = match(name)

packages/ui/src/theme/components/shared/prompt.tsx

@@ -82,38 +82,41 @@ export function Prompt({
 
       match(action)
         .with('copy', () => {
-          navigator.clipboard.writeText(text).then(
-            () => {
+          navigator.clipboard
+            .writeText(text)
+            .then(() => {
               showFeedback('Copied!')
-            },
-            () => {
+              return null
+            })
+            .catch(() => {
               showFeedback('Copy failed')
-            }
-          )
+            })
         })
         .with('cursor', () => {
           // Copy prompt to clipboard then open Cursor so the user can paste into composer
-          navigator.clipboard.writeText(text).then(
-            () => {
+          navigator.clipboard
+            .writeText(text)
+            .then(() => {
               showFeedback('Copied — opening Cursor…')
               globalThis.open('cursor://', '_self')
-            },
-            () => {
+              return null
+            })
+            .catch(() => {
               showFeedback('Copy failed')
-            }
-          )
+            })
         })
         .with('vscode', () => {
           // Copy prompt to clipboard then open VS Code so the user can paste
-          navigator.clipboard.writeText(text).then(
-            () => {
+          navigator.clipboard
+            .writeText(text)
+            .then(() => {
               showFeedback('Copied — opening VS Code…')
               globalThis.open('vscode://', '_self')
-            },
-            () => {
+              return null
+            })
+            .catch(() => {
               showFeedback('Copy failed')
-            }
-          )
+            })
         })
         .with('chatgpt', () => {
           const encoded = encodeURIComponent(text)