M12e: contract pass (pair invite kind, admin name in invite links, sync failed flag, rejection actor, device version name, template id, update check result, untouched accounts, D-027 re-stamp, PushEvent in :core:model, snackbar hosts)

Server: E-3 invite_kind; E-12 link ?from=<admin name>, E-4 passes it into kvitt://invite;
X-Kvitt-App-Version-Name stored in devices.app_version_name (migration 0003, schema 3);
OpenAPI and examples follow. Phone: :core:model, :core:fakes, :data, features and :app
updated together; goldens re-recorded for S-20 (version name) and new S-1/S-22 states.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

server/crates/kvitt-server/src/openapi.rs

@@ -6,8 +6,8 @@
 //! hold for every operation are applied once here, by [`CommonRules`], so they cannot drift per handler:
 //!
 //! * SPEC §14.3.1 headers: every operation takes `X-Kvitt-Protocol` (required on authenticated operations, optional
-//!   on the unauthenticated ones), `X-Kvitt-App-Version` and `Accept-Language`; every response carries
-//!   `X-Kvitt-Server-Version`.
+//!   on the unauthenticated ones), `X-Kvitt-App-Version`, `X-Kvitt-App-Version-Name` and `Accept-Language`; every
+//!   response carries `X-Kvitt-Server-Version`.
 //! * SPEC §14.3.2 always-possible errors: `401`, `426`, `429`, `500`, `503` on authenticated operations and `429`,
 //!   `500`, `503` on unauthenticated ones, unless the operation documents its own.
 //! * Security: the document-level requirement is `device` (bearer, SPEC §8.2); unauthenticated operations declare
@@ -258,6 +258,15 @@ impl Modify for CommonRules {
                 plain_schema(Type::Integer),
             ),
         );
+        components.parameters.insert(
+            "AppVersionName".to_owned(),
+            header_param(
+                "X-Kvitt-App-Version-Name",
+                false,
+                "The app's `versionName`, sent by the app on every call; stored per device like `X-Kvitt-App-Version` (1 to 32 characters, anything else ignored).",
+                plain_schema(Type::String),
+            ),
+        );
         components.parameters.insert(
             "AcceptLanguage".to_owned(),
             header_param(
@@ -339,7 +348,7 @@ fn apply_operation_rules(operation: &mut Operation) {
     } else {
         "Protocol"
     };
-    for name in [protocol, "AppVersion", "AcceptLanguage"] {
+    for name in [protocol, "AppVersion", "AppVersionName", "AcceptLanguage"] {
         parameters.push(RefOr::Ref(Ref::new(format!(
             "#/components/parameters/{name}"
         ))));