The bar graph was calling drawChart3() before Google Charts library
finished loading, causing "Cannot read properties of undefined
(reading 'arrayToDataTable')" error.
Applied same fix as performance page:
- Check if visualization already loaded before calling google.load
- Use callback parameter to ensure charts only draw after load
- Add flag to prevent duplicate library loads
- Guard against missing DOM elements
- Handle AJAX-loaded partial context
Fixes dashboard statistics bar graph view errors.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
no functional change here, but familiar Rails users will see view files in the
locations they expect. this also slightly simplifies controller code
there is one attendant change in the wiki at `rails_3/A1-SQL-Injection-Interpolation.md`
that I'm happy to make after the PR is merged.
Ken Johnson