fix(mobile): use a platform neutral session follow label

apps/mobile/AGENTS.md

@@ -183,12 +183,17 @@ Copy lives in `src/i18n/locales/en.json`. The other 86 catalogs are reviewed
 against the screens their keys render on, so a key's name and its context are
 what a translator has to work from.
 
-- Add and edit copy in `en.json` only. Never hand-edit another catalog. The one
-  exception is a value-level correction of a confirmed mistranslation in an
-  existing non-English entry (a wrong word, not a style preference): fix the
-  value in place, keep the key name, placeholders, and English copy unchanged,
-  verify the corrected string on the screen that renders it, and say so in the
-  pull request. Do not rewrite surrounding entries.
+- Add and edit copy in `en.json` only. Never hand-edit another catalog. The
+  exceptions are value-level edits of an existing non-English entry. For both,
+  keep the key name, the placeholder set, and the surrounding entries as they
+  are, and say so in the pull request:
+  - a confirmed mistranslation, meaning a wrong word rather than a style
+    preference: fix the value in place, leave the English copy unchanged, and
+    verify the corrected string on the screen that renders it;
+  - a change to the meaning of the English copy, or to the surface it names: the
+    existing value in every catalog now describes the old meaning, so update it
+    in each of them, using that catalog's own established wording for the new
+    meaning or surface. `check:i18n` and `check:plurals` still have to pass.
 - Search `en.json` for the string before you add a key. If the copy already
   exists, reuse that key. `pnpm check:i18n` fails when two keys hold the same copy.
 - Put copy used by more than one section under `common.`.