v2.2.0

New languages

• Added German, Spanish, Italian, and Portuguese translations across all 12 namespaces (thanks @cedriclocqueneux!)

Timeline layout improvements

• Replaced greedy lane assignment with a force-directed simulation for better milestone placement; falls back to greedy for dense zoom levels
• Normalised repulsion force by neighbour count to fix crowding at dense zoom levels
• Fixed force-directed lane repulsion tie-breaking

UI polish

• Normalised add-milestone and add-chapter button heights and sizing
• Removed browser button chrome and fixed uneven text centering on add buttons
• Compacted bottom bar on landscape mobile to free vertical space
• Hidden minimap on ultraCompact screens (landscape phones) and below 380px height / 400px width

Media placeholder fixes

• Fixed raw HTML entity strings (🎬 / 🎧) rendering literally instead of as emoji in the media-unavailable block
• Removed redundant icon span from the audio/video unavailable block (emoji now lives in the i18n string)
• Updated placeholder text in all 6 languages to clarify media is stored on the originating device, not just "synced from another device"

Internals (forward-compat)

• Added media_id, photo_id, and thumbnail_id fields to the milestone schema; stable reference slots for the upcoming content-addressed blob store; all null today
• Wired media_id and photo_id on milestone create and edit paths, mirroring the existing IndexedDB blob-key convention
• One-time startup backfill stamps existing milestones that have media but no reference IDs yet