fix: review findings for lazysecrets list: recent means the last 90 days, cache saves lock and keep deletions and the TUI's cursors, failed lists aren't retried, one expiry rule

internal/cachefile/lock_other.go

@@ -0,0 +1,7 @@
+//go:build !unix
+
+package cachefile
+
+// lock does nothing here: saves can then race, losing lists that load
+// again.
+func lock(string) (func(), error) { return func() {}, nil }