feat(app): improve tool call sheet with word-level diff and better UX

- Add word-level highlighting using LCS algorithm for edit diffs
- Match diff colors to explorer sidebar (GitHub-style rgba backgrounds)
- Use discriminated union for tool call parsing (shell, edit, generic)
- Add horizontal scroll for bash/command output instead of wrapping
- Remove status badge from bottom sheet header
- Fix sheet snap points (60%/95%) and disable dynamic sizing
- Add min-width to diff viewer for full-width backgrounds

🤖 Generated with [Claude Code](https://claude.com/claude-code)

packages/app/src/components/message.tsx

@@ -1168,12 +1168,8 @@ export const ToolCall = memo(function ToolCall({
       args,
       result,
       error,
-      parsedEditEntries,
-      parsedReadEntries,
-      parsedCommandDetails,
-      cwd,
     });
-  }, [openToolCall, toolName, kind, status, args, result, error, parsedEditEntries, parsedReadEntries, parsedCommandDetails, cwd]);
+  }, [openToolCall, toolName, kind, status, args, result, error]);
 
   // Dummy renderDetails to make badge tappable - actual content is rendered in the sheet
   const dummyRenderDetails = useCallback(() => null, []);