docs(docs): update documentation for tool installation and desktop app changes

docs/tools/github-cli.mdx

@@ -48,7 +48,7 @@ Authentication is per machine: run `gh auth login` once. Tokens live in gh's `ho
 | `dlvhdr/gh-dash` | `gh dash` | PR, issue, and notification dashboard (configured below). |
 | `meiji163/gh-notify` | `gh notify` | Notification viewer. |
 
-`.chezmoiscripts/run_onchange_after_20-gh-extensions.sh.tmpl` installs them:
+`.chezmoiscripts/run_onchange_after_20-gh-extensions.sh.tmpl` installs them. It is a fish script, so fish's config is sourced first and `PATH` and `GITHUB_TOKEN` match a fish session:
 
 <Steps>
   <Step title="Re-run trigger">

docs/tools/index.mdx

@@ -63,7 +63,7 @@ These packages are declared in `.chezmoidata/packages.yaml` but have no config f
 | `wget` | HTTP downloads | Not referenced by any config. |
 | `zsh-syntax-highlighting` | zsh highlighting | Sourced by the zsh setup. See [Shell](/shell). |
 | `ttf-victor-mono-nerd` / `font-victor-mono-nerd-font` | Nerd Font | Terminal font. See [Terminal](/terminal). |
-| `suvadu`, `mandible` | Declared under `packages.shared.cargo` | Installed by [`40-post`](/chezmoi/scripts#40-post) when `cargo` exists. `mandible` backs the tmux-palette "mandible" item via `~/.local/bin/mandible-pick`. |
+| `suvadu`, `mandible` | Declared under `packages.shared.cargo` | Installed by [`15-tools`](/chezmoi/scripts#15-tools), which installs rustup first when `cargo` is missing. `mandible` backs the tmux-palette "mandible" item via `~/.local/bin/mandible-pick`. |
 
 Tools with their own pages in other sections: [fish](/shell/fish), [starship](/shell/starship), and [atuin](/shell/atuin) under Shell; [kitty](/terminal/kitty) and [tmux](/terminal/tmux) under Terminal.
 

docs/tools/topgrade.mdx

@@ -65,13 +65,12 @@ Post-commands run after everything else:
 
 | Name | Command |
 | --- | --- |
-| Omp Update | `omp update` |
 | Hermes Update | `hermes update --backup --yes` |
 | Herdr Update | `herdr update` |
 | Shelly Update | `shelly upgrade-all -n` |
 | Cachy Update | `cachy-update` |
 
-`shelly upgrade-all -n` is also available as the `sua` alias. The post-commands assume CachyOS tooling (`shelly`, `cachy-update`) and the owner's own CLIs (`omp`, `hermes`, `herdr`); on machines without them those steps fail.
+`shelly upgrade-all -n` is also available as the `sua` alias. The post-commands assume CachyOS tooling (`shelly`, `cachy-update`) and the owner's own CLIs (`hermes`, `herdr`); on machines without them those steps fail. omp has no post-command: it is a global mise tool, so topgrade's built-in mise step (`mise upgrade`) updates it, and `omp update` would overwrite the binary inside mise's install directory.
 
 :::note
 `chezmoi re-add` does not overwrite templates, so edits made directly to rendered files such as `~/.gitconfig` are not captured; change the `.tmpl` source instead.