bug: Lobby countdown displays wrong time — ticks vs seconds mismatch

[TheMeinerLP]

Description

The lobby HUD displays "02:00" (120 seconds) when only 6 real seconds pass. The root cause is a ticks-vs-seconds unit mismatch: the phase duration is stored in ticks (e.g. 120 ticks = 6 seconds at 20 TPS) but the HUD formats it as if it were seconds.

Acceptance Criteria

• The countdown displays the correct wall-clock time remaining (e.g. "0:06" for 120 ticks at 20 TPS)
• The conversion `ticks / 20 = seconds` is applied before formatting
• A shared utility method `TickUtils.toSeconds(long ticks)` is introduced to prevent future mismatches
• Unit test covers the conversion and the display formatting

Technical Details

• Bug is in the `GameHud` countdown formatter or the value passed to it from `LobbyPhase`
• Check all phase duration constants for unit consistency (ticks vs seconds vs milliseconds)
• `TimedPhase` (if used) stores duration — verify its unit contract

Dependencies

None

Estimate

S