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/web-ui/dashboard.md

@@ -449,7 +449,7 @@ on the `openDialog` core:
   button takes focus). Selecting the backdrop and `Esc` both cancel.
 - `themedToast(message, { type, ... })` — a non-blocking toast (top-right,
   `info` / `error` / `ok`) for transient validation + action
-  failures, so an error doesn't trap the operator behind a modal.
+  failures, so an error doesn't lock the operator behind a modal.
   Single-action errors autodismiss; bulk / partial-failure
   summaries are sticky (select to dismiss) so they aren't missed.
 
@@ -493,7 +493,7 @@ frosted-mauve bar slides up from the bottom of the viewport
 <!-- vale write-good.Passive = NO -->
 - **Count + names** — "N agents selected · name1, name2, …"
 - **Bulk action buttons** — only enabled when ALL selected agents
-  support the action; disabled with a tooltip naming the blockers
+  support the action; greyed out with a tooltip naming the blockers
   when the selection is mixed:
   - `↺ R3ST4RT` — running agents only
   - `■ ST0P` — running agents only