Transformed key user-facing pages with modern UI patterns:
**Login Page (sessions/new.html.erb)**:
- Enhanced warning box with gradient background and backdrop blur
- Added arrow indicator to "Learn more" link
- Improved visual hierarchy with better icon sizing
**Signup Page (users/new.html.erb)**:
- Complete rewrite from Bootstrap 2 to Bootstrap 5
- Modern card-based layout matching login page aesthetic
- Icon-enhanced form inputs with proper labels
- Side-by-side first/last name fields
- Gradient info box with training environment notice
- Proper form validation attributes
**Dashboard Home (dashboard/home.html.erb)**:
- Replaced old .span12/.row-fluid with modern grid
- Clean card-based layout with shadow
- Icon-enhanced header and buttons
- Loading spinner states during chart transitions
- Active button state indicators for chart type toggle
- Turbolinks compatibility
- Improved accessibility with ARIA labels
All pages now feature:
- Bootstrap 5 components and utilities
- Bootstrap Icons integration
- Rounded corners and modern spacing
- Gradient accents and visual depth
- Smooth transitions and hover states
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Fixed "Cannot read properties of undefined (reading 'update')" errors
caused by chart setTimeout callbacks persisting across Turbolinks page
navigations.
Changes:
- Add existence checks before initializing charts
- Guard all .update() calls with element and instance checks
- Track all setTimeout IDs in chartTimeouts array
- Clear timeouts on Turbolinks navigation events
- Clear timeouts at start of pieChartHome() to prevent duplicates
This ensures chart update callbacks only run when chart elements exist
on the page, preventing errors when navigating to pages without charts.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
* add 'aria-label' into some elements without the label
* add 'aris-label' into some visual elements
* replace some 'a' elements have a button action to 'button'
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