fix: detect game start for Pack 7+ titles that don't use state: "Gameplay"

Pack 7 games (Quiplash 3, Blather Round) transition room state from
"Lobby" to "Logo" instead of "Gameplay". Even newer titles (Doominate,
Big Survey) have no room entity at all — the only signals are room/lock
and room/exit opcodes.

- parseRoomEntity: detect game started as any non-Lobby state
- handleMessage: add room/lock and room/exit opcode handling
- handleRoomLock: emit game.started as fallback for room-entity-less games
- handleRoomExit: emit game.ended on explicit room close
- Tests: 6 new tests covering Logo state, room/lock, room/exit

Verified against live rooms: quiplash3, blanky-blank, you-ruined-it,
bigsurvey.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/config/branding.js

@@ -2,7 +2,7 @@ export const branding = {
   app: {
     name: 'HSO Jackbox Game Picker',
     shortName: 'Jackbox Game Picker',
-    version: '0.6.5 - Fish Tank Edition',
+    version: '0.7.0 - Fixed For Real Edition',
     description: 'Spicing up Hyper Spaceout game nights!',
   },
   meta: {