This PR addresses two key issues with the website structure and SEO:

Page Structure Consolidation

The previous structure with separate /ueber, /kontakt, and /impressum pages was redundant. Contact information is now logically consolidated into the "About" page:

• Merged contact content: All contact information, community guidelines, and acknowledgments from kontakt.mdx are now part of ueber.mdx as a comprehensive "Kontakt" section
• Simplified navigation: The Info sidebar now shows only "Über open-fidup" and "Impressum", providing a cleaner user experience
• Preserved functionality: All contact details, GitHub links, community guidelines, and thank you messages remain accessible

SEO Duplicate Content Fix

The site was suffering from significant SEO issues due to duplicate content indexing:

Before: 501 pages indexed including 246 duplicate v1/ pages
After: 255 pages indexed with v1/ pages properly excluded

Technical Implementation

Added a sitemap filter to exclude legacy v1/ content:

sitemap({
    changefreq: 'weekly',
    priority: 0.7,
    lastmod: new Date(),
    filter: (page) => !page.includes('/v1/'),
}),

This change eliminates the SEO penalty from duplicate content while maintaining the v1/ pages for any existing bookmarks or links.

Impact

• ✅ Cleaner, more logical page structure
• ✅ Resolved SEO duplicate content issues
• ✅ Reduced sitemap from 501 to 255 pages
• ✅ Improved user navigation experience
• ✅ All functionality preserved with better organization

The changes are minimal and surgical, addressing the core issues without disrupting existing functionality or content accessibility.

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