Fix flyway migration and use h2 in unit tests.

.clinerules/frontend-color-theme.md

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+## Brief overview
+Project-specific frontend color theme guidelines for the vibing application. Defines a cohesive peach/coral/pink color palette with specific CSS custom properties, component styling patterns, and accessibility requirements.
+
+## Color palette usage
+- Always use the defined peach-coral color scheme: Primary Peach (#FFCDB2), Secondary Coral (#FFB4A2), Light Pink (#E5989B), Medium Mauve (#B5838D), Dark Purple (#6D6875)
+- Implement CSS custom properties in src/index.css for all color definitions
+- Use semantic color naming: --color-primary, --color-secondary, --color-bg-dark, --color-text-primary, etc.
+- Support both dark and light modes using @media (prefers-color-scheme: light)
+
+## Component styling patterns
+- Buttons: Use gradient backgrounds, implement translateY(-2px) hover animations, apply consistent focus states with peach outline
+- Cards: White backgrounds with subtle shadows, translateY(-8px) hover animations, 16px border radius, scale(1.05) image hover effects
+- Links: Primary color #FFCDB2, hover colors #E5989B (dark mode) or #B5838D (light mode), no text decoration by default
+- Use semantic CSS class names: .btn-primary, .btn-secondary, .btn-outline, .btn-ghost
+
+## Interactive states and animations
+- Apply subtle lift animations using transform: translateY(-2px) for hover effects
+- Use rgba(255, 205, 178, 0.3) for focus rings and primary shadows
+- Use rgba(229, 152, 155, 0.3) for secondary shadows
+- Ensure hover states are distinct from focus states for accessibility
+
+## File organization structure
+- Place global styles and CSS custom properties in src/index.css
+- Create individual .css files in src/components/ for component-specific styles
+- Use src/App.css for utility classes
+- Consider src/styles/ directory for additional theme files when needed
+
+## Accessibility requirements
+- Maintain minimum contrast ratios: 4.5:1 for normal text, 3:1 for large text
+- Use --color-focus for focus indicators
+- Test with color blindness simulators
+- Ensure all interactive elements have proper focus states