feat: add TMP3 support and fix shard probe lifecycle bug

Add Trivia Murder Party 3 (Playtest) ticker and seed data. Bind-mount
tickers.json in docker-compose so ticker changes take effect on restart
without image rebuilds.

Fix shard monitor probe poisoning game lifecycle state — the player-count
probe no longer sets gameFinished, which was preventing the main WS from
processing room/lock and room/exit for games like TMP3 that don't send
entity updates.

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

backend/config/tickers.json

@@ -8,6 +8,7 @@
   "FBG4": "Fibbage 4",
   "TMP1": "Trivia Murder Party",
   "TMP2": "Trivia Murder Party 2",
+  "TMP3": "Trivia Murder Party 3 (Playtest)",
   "DRWF": "Drawful",
   "DRWA": "Drawful Animate",
   "DD": "Dirty Drawful",

backend/utils/ecast-shard-client.js

@@ -172,8 +172,9 @@ class EcastShardClient {
                 this.playerCount = playerCount;
                 this.playerNames = playerNames;
               }
-            } else if (msg.opcode === 'error' && msg.result?.code === 2027) {
+            } else if (msg.opcode === 'error') {
-              this.gameFinished = true;
+              // Probe errors are transient — lifecycle is managed
+              // by the main connection and reconnect logic
             }
           } catch (_) {}
           clearTimeout(timeout);
@@ -562,6 +563,8 @@ class EcastShardClient {
         finalPlayerCount: this.playerCount,
       });
       activeShards.delete(`${this.sessionId}-${this.gameId}`);
+      this.gameFinished = true;
+      this.disconnect();
       return false;
     } finally {
       this.reconnecting = false;

docker-compose.yml

@@ -17,6 +17,7 @@ services:
       - jackbox-data:/app/data
       - ./games-list.csv:/app/games-list.csv:ro,z
       - ./backend/config/admins.json:/app/config/admins.json:ro,z
+      - ./backend/config/tickers.json:/app/config/tickers.json:ro,z
     ports:
       - "5000:5000"
     networks:

frontend/src/config/branding.js

@@ -2,7 +2,7 @@ export const branding = {
   app: {
     name: 'HSO Jackbox Game Picker',
     shortName: 'Jackbox Game Picker',
-    version: '0.7.12 - Pokémon-Go-To-The-Polls Edition',
+    version: '0.7.13 - Pokémon-Go-To-The-Polls Edition',
     description: 'Spicing up Hyper Spaceout game nights!',
   },
   meta: {

games-list.csv

@@ -58,3 +58,4 @@ Jackbox Naughty Pack,Fakin’ It All Night Long,3,8,????,?,No,?,?
 Jackbox Naughty Pack,Dirty Drawful,3,8,????,?,No,?,?
 Jackbox Naughty Pack,Let Me Finish,3,8,????,?,No,?,?
 Jackbox Party Pack,Survey Scramble,2,10,????,Yes,Yes,?,?
+Jackbox Party Pack Playtests,Trivia Murder Party 3 (Playtest),1,8,????,?,No,Trivia,