* Expose chat.analyzeMediaImage in Python API for batch image metadata generation
* Fix updateMedia losing linkedPostIds by reading existing sidecar before overwriting
* Also preserve author from sidecar when DB value is null (data drift)
* Extend MetadataDiffEngine to cover media, scripts, and templates
* Redesign MetadataDiffPanel: item-first view with field pills, filtering, and per-item multi-field diffs
* Fix task:progress startsWith crash (taskId not id) and nested button violation in field pills
* Populate field diffs for file-missing items and show fileMissing badge in UI
* feat: extended meta diff
* feat: meta diff als reconstructs orphans
* chore: updated documentation
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Co-authored-by: hugo <hugoms@me.com>
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