initial commit

app/utils/ceilings.js

@@ -0,0 +1,4 @@
+// The two ceilings, in one place. The window stops polling past them; the
+// file card shows its warning past its own.
+export const ANSWER_CEILING_MS = 10 * 60 * 1000;
+export const FILE_CEILING_MS = 30 * 60 * 1000;