Split client and server revision tracking

server/app/version.py

@@ -0,0 +1,22 @@
+"""Server version metadata helpers.
+
+This module owns the server-only revision identifier used for diagnostics and
+`/version` output. The shared public release version continues to come from the
+client's `public/version.js` metadata so one release number can be used across
+the whole app.
+"""
+
+from __future__ import annotations
+
+
+SERVER_REVISION = "S001"
+
+
+def format_server_version(release_version: str) -> str:
+    """Return display text for the current server build."""
+
+    release = str(release_version).strip()
+    revision = str(SERVER_REVISION).strip()
+    if release and revision:
+        return f"{release} {revision}"
+    return release or revision or "unknown"