Add card management pages and enhance category mappings UI.

Features added:
- Cards page with list/create/edit/delete functionality
- EditCard page for modifying card details
- Enhanced CategoryMappings UI with inline add/edit/delete modals
- Category dropdown autocomplete in mapping forms
- Priority badges and visual indicators for high-priority mappings
- Click-to-edit functionality on patterns

Improvements:
- TransactionCategorizer: Add TARGET.COM to online shopping patterns
- TransactionCategorizer: Set Credit Card Payment to priority 200 to catch before Banking
- TransactionCategorizer: Add database migration comments
- Layout: Add Cards link to navigation
- Layout: Fix Bootstrap JS path
- ValidationScriptsPartial: Use Url.Content for script paths

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

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

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