docs/install/clawdock.md: renamed '## Related pages' to '## Related'
for consistency with sibling install docs and converted the 3-bullet
list into a CardGroup linking docker, docker-vm-runtime, and updating.
docs/install/nix.md: replaced 2 typography characters with ASCII
equivalents and converted the 3-bullet Related list into a CardGroup,
adding an Updating card so readers wiring nix-openclaw next to a
managed install see the upgrade path.
docs/concepts/features.md: converted the 2-bullet Related list into a
CardGroup, adding cross-links to channels and plugins so the page now
points readers at both deeper concepts (experimental features, agent
runtime) and direct surfaces (channels, plugins).
docs/tools/pdf.md: replaced 2 typography characters with ASCII
equivalents.
Two recent code changes lacked or had only partial doc coverage:
- contextInjection 'never' (#65006, xDarkicex): the new mode is now
documented under agents.defaults.contextInjection, alongside the
existing 'continuation-skip' mode, with guidance on when to use it
(custom context engines, native runtimes that own their prompt).
- Nix Home Manager daemon PATH (#44402, jerome.benoit): document the
service PATH auto-discovery (NIX_PROFILES right-to-left precedence
and ~/.nix-profile/bin fallback) under the Nix install page.
Also sentence-case three Title-Cased headings on the Nix page ('What
You Get', 'Quick Start', 'Nix Mode Runtime Behavior') and drop a
duplicate body H1 that restated the frontmatter title.
