Slugs and titles now say what each command does, and every command is
described the same way.
- `sessions` "Chat Sessions" -> `chat-history` "Chat History"
- `models` "Ollama Models" -> `manage-models` "Manage Models"
- `setup` "Set Up Lam Agent" -> "Setup & Status", which no longer repeats
the extension name
- Drop the redundant "Lam Agent" subtitle from chat, snip and models: the
extension name is already shown next to the command
`chat` and `snip` keep their slugs, so the deeplinks and hotkeys the README
documents still work, and the two cross-launches (`snip` -> `chat`,
chat -> `snip`) are untouched. The other two slugs change, so a deeplink or
a shortcut bound to `sessions` or `models` needs rebinding.
In-view navigation titles are aligned with the new titles (the setup view
was "Lam Agent Setup"), and the README's command table, architecture tree
and prose follow.