feat(lstmobile): intial scanner setup kinda working

lstMobile/src/lib/versionValidation.ts

@@ -0,0 +1,43 @@
+
+
+export type ServerVersionInfo = {
+  packageName: string;
+  versionName: string;
+  versionCode: number;
+  minSupportedVersionCode: number;
+  fileName: string;
+};
+
+export type StartupStatus =
+  | { state: "checking" }
+  | { state: "needs-config" }
+  | { state: "offline" }
+  | { state: "blocked"; reason: string; server: ServerVersionInfo }
+  | { state: "warning"; message: string; server: ServerVersionInfo }
+  | { state: "ready"; server: ServerVersionInfo | null };
+
+export function evaluateVersion(
+  appBuildCode: number,
+  server: ServerVersionInfo
+): StartupStatus {
+  if (appBuildCode < server.minSupportedVersionCode) {
+    return {
+      state: "blocked",
+      reason: "This scanner app is too old and must be updated before use.",
+      server,
+    };
+  }
+
+  if (appBuildCode !== server.versionCode) {
+    return {
+      state: "warning",
+      message: `A newer version is available. Installed build: ${appBuildCode}, latest build: ${server.versionCode}.`,
+      server,
+    };
+  }
+
+  return {
+    state: "ready",
+    server,
+  };
+}