feat(home): add imgBackground option to about component

[PierreBrisorgueil]

Context

When about sections display images (especially SVG illustrations), the image floats directly on the section background. This can look empty or oversized, particularly with single content items. Premium landing pages typically wrap visuals in their own card with a distinct background color.

Proposal

Add an imgBackground option per content item in home.about.component.vue:

about: {
  content: [{
    subtitle: '...',
    text: '...',
    img: '/images/illustration.svg',
    imgBackground: '#f5f5f7', // wraps image in a rounded card with this bg
    reversed: false,
  }]
}

Implementation:

• When item.imgBackground is set, wrap the v-img in a v-card with:
  • color set to imgBackground
  • Same border-radius as theme (config.vuetify.theme.rounded)
  • Padding to give the image breathing room
• When not set, current behavior (image directly on section bg)
• Support theme-aware values (could accept an object { light: '#f5f5f7', dark: '#1e293b' })

Benefit

Images get their own visual identity, making about sections look more polished and contained.