feat(glance): show the favourite code in the glance (opt-in)

With "Show the favourite code in the glance" on, the glance shows the
code of the first favourite TOTP or Steam entry without the PIN, with a
countdown bar. The glance can't open the vault, so the About scan seals
that entry under "g" (device key, aad OTPW-GL-1) after every change, and
removes it when the option is off or no entry qualifies; the glance also
reads the option itself. HKDF moves to its own module so the glance loads
only the crypto it needs (37 % of its 64 KB). Manage entry gains "Mark as
favourite (glance)" and "Remove favourite", queued for locked entries
like the other changes. Lines are inset on round screens so the
Instinct 3's curved glance corner doesn't cut them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/source/storage/Vault.mc b/source/storage/Vault.mc
index 88054e0..fcd973f 100644
--- a/source/storage/Vault.mc
+++ b/source/storage/Vault.mc
@@ -34,6 +34,9 @@ class Vault {
     // The "Encrypt names" setting: new entries keep their names in the
     // encrypted part (existing ones are converted by AboutScan).
     var encryptNames as Boolean = false;
+    // The "Show the favourite code in the glance" option (AppState); the
+    // About scan stores or removes the glance item by it (GlanceStore).
+    var glanceCode as Boolean = false;
 
     private var _store as Persist.Backend;
     private var _meta as Dictionary<Application.Storage.KeyType, Application.Storage.ValueType>;