refactor: move the server-reset clock out of daily.ts

Ticks are about to stop being its only caller: the countdown needs the same
grid, and daily.ts already imports time.ts, so asking for it the other way
would close a cycle. time.ts is where it belongs anyway — it has held
REGION_RESET_UTC_OFFSET all along, and serverOffsetUtc is that table's
accessor. Nothing changes shape; `shift` is exported as `resetShiftMs`
because dayKey now reads it across a module boundary.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

test/daily.test.ts

@@ -8,12 +8,15 @@ import {
   isDaily,
   msUntilReset,
   nextResetMs,
-  resetHourFor,
-  RESET_HOUR_LOCAL,
   resolveDaily,
   streakOf,
 } from "../src/shared/daily.ts";
-import { DAY, HOUR } from "../src/shared/time.ts";
+import {
+  DAY,
+  HOUR,
+  resetHourFor,
+  RESET_HOUR_LOCAL,
+} from "../src/shared/time.ts";
 
 const at = (iso: string) => Date.parse(iso);