fix: the key picker leaves share.key to the docs

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/sharefiles.go

@@ -148,8 +148,8 @@ func (m *Model) pickShareKey(s sharing) tea.Cmd {
 	m.search.pickLines = m.sharedFiles(s)
 	m.search.pickHeading = "Pick a secret to encrypt with"
 	m.search.pickHelp = []string{
-		m.st.Muted.Render("The recipient needs read access to it to decrypt the files. Its value"),
+		m.st.Muted.Render("The recipient needs read access to it to decrypt the files."),
-		m.st.Muted.Render("isn't shown or put in the link. share.key sets one for a repo, or for all."),
+		m.st.Muted.Render("Its value isn't shown or put in the link."),
 	}
 	m.search.input.SetWidth(searchWidth(m.w) - 10) // inside the picker's border
 	m.fillSearch(false)