test(cli): expand alerts add/list/remove test coverage

src/core/extension.ts

@@ -290,7 +290,7 @@ export async function runAutoExtensions(
             const needsExtension = entries.filter(e => {
                 if (!e.live_until_ledger) return false;
                 const remaining = e.live_until_ledger - latestLedger;
-                return remaining > 0 && remaining < policy.extend_when_below_ledgers;
+                return remaining >= 0 && remaining < policy.extend_when_below_ledgers;
             });
 
             if (needsExtension.length === 0) return;

src/rpc/client.ts

@@ -128,7 +128,7 @@ export class StellarRpcClient {
         if (typeof serverAny.getLatestLedger === "function") {
             try {
                 const response = await serverAny.getLatestLedger();
-                if (response && typeof response.sequence === "number") return response.sequence;
+                if (response && typeof response.sequence === "number" && response.sequence > 0) return response.sequence;
             } catch (error) {
                 logger.debug("getLatestLedger failed, falling back to getHealth", error);
             }