* fix(frontend): prevent duplicate and reserved agent tool names
Extend tool name validation to detect duplicates within an agent step
and reserved names (like 'preprocessor', 'failure'). Show specific error
messages in the editor panel and red styling in the graph view.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(frontend): remove duplicate banner for agent tool name errors
The inline per-tool error messages are sufficient — the panel-level
banner was redundant and showed a double error.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
c431053a1e