fix: don't show redundant output clipped hint when line count is shown

When both line clipping and char clipping triggered, the UI showed
both "… +N lines" and "… output clipped". Now only the line count
hint is shown since it already implies clipping.

👾 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta <noreply@letta.com>

src/cli/components/CollapsedOutputDisplay.tsx

@@ -88,8 +88,8 @@ export const CollapsedOutputDisplay = memo(
             </Box>
           </Box>
         )}
-        {/* Character clipping hint */}
-        {clippedByChars && (
+        {/* Character clipping hint (only if not already showing line count) */}
+        {clippedByChars && hiddenCount === 0 && (
           <Box flexDirection="row">
             <Box width={PREFIX_WIDTH} flexShrink={0}>
               <Text>{"     "}</Text>