- Root container uses calc(100vh - 220px) for fixed viewport height
- All flex children use min-h-0 to enable proper overflow scrolling
- Removed duplicate bottom nav buttons (Zurueck/Weiter) that appeared
in the middle of the chunk text — navigation is only in the header now
- Chunk text panel scrolls internally with fixed header
- Added prominent article/section badges in header and panel header
- Added chunk length quality indicator (warns on very short/long chunks)
- Structural metadata keys (article, section, pages) sorted first
- Sidebar shows regulation name instead of code for better readability
- PDF viewer uses pages metadata from payload when available
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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