docs: rephrase the vale warnings that have a better wording

Words the alex and Microsoft styles flag where a plainer one reads as well:
disabled/special/invalid as a state, primitive, trap, hang, several, click,
first-person FAQ questions, hyphenated adverb pairs. Left as they are: Let's
Encrypt, quoted UI labels and phrases, the generated forge CLI reference, and
the middle-click gesture.

docs/turn-loop/config.md

@@ -221,7 +221,7 @@ services.hyperhive.agent.claudePluginsAutoUpdate = false;               # defaul
 
 - **`claudePluginsAutoUpdate`** — when `true`, runs
   `claude plugin marketplace update` before installing plugins to pull
-  the latest index. Disabled by default to keep boot times short and
+  the latest index. Off by default to keep boot times short and
   plugin versions pinned.
 
 ## `cargo.shortMessages`
@@ -265,7 +265,7 @@ is a no-op without the other:
   consolidated harness state file so the operator dashboard also stops reading this
   agent's empty `~/.claude/` as "needs login." An api-key agent that hits
   a real 401 (the key itself is bad) still surfaces `needs_login` — the
-  harness skips only the boot-time "have I ever logged in" check, not
+  harness skips only the boot-time check for an earlier login, not
   the auth-failure path.
 - **`backendEnvironmentFile`** points at an operator-managed file
   (outside the nix store, one `KEY=value` per line, systemd