docs: GitLens v17.0.0–v19.0.1 audit — prose updates + 31 regenerated images

[Roberto-Vizcarra]

Generated by gkdocs run gitlens for v17.0.0..v19.0.1.

Summary

Automated documentation audit covering 3,312 commits across 22 releases (v17.0.0 through v19.0.1). This PR includes:

Prose updates

• 101 prose edits across 12 help center pages
• New sections for: commit composer, branch recomposition, AI explain commands, natural language commit search, Linear integration, Azure DevOps Server, commit signature verification, Start Review command, submodule support, and more
• Updated settings documentation for 20+ new/changed settings
• Corrected feature descriptions and access paths

Regenerated images (31)

• 8 compose/recompose screenshots with production-quality content from the Playground2026 fixture repo
• Graph sidebar, commit graph, search, filter, settings, and sign-in/out screenshots
• All screenshots use realistic TypeScript source files, masked avatars and simulator labels
• Old images retained — refs repointed, nothing deleted

Deferred (not in this PR)

• 7 images requiring live integration auth (Launchpad, Cloud Patches, Code Suggest)
• 15 images without specs yet (need authoring)
• 3 AI-dependent captures needing manual verification (branch summary, commit message generation)
• 10 images missing alt text (backfill after image regeneration stabilizes)

Automation repo

Spec fixes, findings, and prose records: gk-docs-automation