A tool call aborted mid-batch to service queued steering/peer input emits a synthetic placeholder result with isError:true so the model retries it. The TUI keyed all error styling (red ✘, red frame/text) off that flag, so a normal steering skip rendered identically to a real tool failure.
Mark the skip placeholder with the existing SyntheticToolResultDetails discriminator (source: "interrupt_skipped", executed:false) and render benign skips through the neutral generic card (info glyph, dim text, neutral background), bypassing any bespoke error frame. Genuine failures keep their error styling.
Fixes#7199
- Extracted #formatToolExecution into a standalone formatDefaultToolExecution module.
- Updated xdev renderXdevCall and renderXdevResult to use the default card when no mounted renderer exists.
- Added fallback rendering that shows tool label, args, and output with appropriate theming.
- Added integration test verifying generic card renders for mounted tools without bespoke renderers.
roboomp