feat: Add comprehensive test suite and misc improvements

- Add frontend unit tests with Vitest for components, hooks, pages, and utilities
- Add backend tests for webhooks, notifications, middleware, and edge cases
- Add ForgotPassword, NotFound, and ResetPassword pages
- Add migration for orphaned staff resources conversion
- Add coverage directory to gitignore (generated reports)
- Various bug fixes and improvements from previous work

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/hooks/usePlanFeatures.ts

@@ -83,7 +83,8 @@ export const FEATURE_NAMES: Record<FeatureKey, string> = {
   custom_domain: 'Custom Domain',
   white_label: 'White Label',
   custom_oauth: 'Custom OAuth',
-  plugins: 'Custom Plugins',
+  plugins: 'Plugins',
+  can_create_plugins: 'Custom Plugin Creation',
   tasks: 'Scheduled Tasks',
   export_data: 'Data Export',
   video_conferencing: 'Video Conferencing',
@@ -104,7 +105,8 @@ export const FEATURE_DESCRIPTIONS: Record<FeatureKey, string> = {
   custom_domain: 'Use your own custom domain for your booking site',
   white_label: 'Remove SmoothSchedule branding and use your own',
   custom_oauth: 'Configure your own OAuth credentials for social login',
-  plugins: 'Create custom plugins to extend functionality',
+  plugins: 'Install and use plugins from the marketplace',
+  can_create_plugins: 'Create custom plugins tailored to your business needs',
   tasks: 'Create scheduled tasks to automate plugin execution',
   export_data: 'Export your data to CSV or other formats',
   video_conferencing: 'Add video conferencing links to appointments',