feat: replay from lobby, contributor mislead card, editable track cards

Return to lobby (replay without recreating the room):
- lobby:return (host): reset to lobby, scores to 0, keep players + tracks
- client: end screen has "Rejouer" (host) + "Quitter"; store clears transient
  game state whenever the room goes back to lobby

Contributor has nothing to input:
- round:start carries a private `mine: true` to the contributor only (via
  RoundStart.secretPlayerId targeted emit); they're excluded from eligible
  voters. Client shows a "fais-les se tromper" card instead of the vote form.

Editable track submission:
- submitTrack ack returns trackId + youtubeId; new blindtest:removeTrack
- lobby shows submitted tracks as cards (YouTube thumbnail + title) with delete

Verified e2e (3 players): add/remove, private mine flag, return-to-lobby reset.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/server/src/game/engine.ts

@@ -16,6 +16,8 @@ import type { GameRound, RoomGameController, RoundContext } from "./round"
 interface RoundRuntime {
   round: GameRound
   djId: string | null
+  /** Contributeur (blindtest) : reçoit round:start privé et ne vote pas. */
+  secretPlayerId: string | null
   votes: Map<string, Answer>
   startedAt: number
   endsAt: number
@@ -120,6 +122,7 @@ export class GameEngine implements RoomGameController {
     this.runtime = {
       round,
       djId: start.djId ?? null,
+      secretPlayerId: start.secretPlayerId ?? null,
       votes: new Map(),
       startedAt,
       endsAt,
@@ -127,13 +130,24 @@ export class GameEngine implements RoomGameController {
     }
     this.room.status = "in_round"
     this.broadcastState()
-    this.io.to(this.room.code).emit("round:start", {
+    const base = {
       type: round.type,
       djId: this.runtime.djId ?? undefined,
       startsAt: startedAt,
       endsAt,
       payload: start.payload,
-    })
+    }
+    // Le contributeur reçoit un round:start privé (mine: true) ; il reste secret
+    // pour les autres (qui ne reçoivent que `base`).
+    const secretSocketId = this.runtime.secretPlayerId
+      ? this.room.players.get(this.runtime.secretPlayerId)?.socketId
+      : null
+    if (secretSocketId) {
+      this.io.to(secretSocketId).emit("round:start", { ...base, mine: true })
+      this.io.to(this.room.code).except(secretSocketId).emit("round:start", base)
+    } else {
+      this.io.to(this.room.code).emit("round:start", base)
+    }
 
     // Attend la première condition de fin : timer écoulé OU tous votés.
     await new Promise<void>((resolve) => {
@@ -177,10 +191,14 @@ export class GameEngine implements RoomGameController {
     }
   }
 
-  /** Votants éligibles : tous les joueurs connectés (le DJ neutre vote aussi). */
+  /**
+   * Votants éligibles : joueurs connectés (DJ neutre inclus), hors contributeur
+   * (blindtest) qui n'a rien à saisir.
+   */
   private eligibleVoters(): string[] {
+    const secret = this.runtime?.secretPlayerId
     return [...this.room.players.values()]
-      .filter((p) => p.connected)
+      .filter((p) => p.connected && p.id !== secret)
       .map((p) => p.id)
   }
 

apps/server/src/game/modes/blindtest/blindtest-round.ts

@@ -76,7 +76,12 @@ export class BlindtestRound implements GameRound {
     const payload: BlindtestRoundPayload | null = track
       ? { trackId: track.id, youtubeId: track.youtubeId }
       : null
-    return { djId, payload, data: track ? { track } : null }
+    return {
+      djId,
+      payload,
+      secretPlayerId: track?.submittedBy,
+      data: track ? { track } : null,
+    }
   }
 
   submitAnswer(ctx: RoundContext, playerId: string, answer: Answer): void {

apps/server/src/game/round.ts

@@ -18,6 +18,11 @@ export interface RoundStart {
   durationSec?: number
   /** Payload broadcasté aux clients, SANS la réponse. */
   payload: unknown
+  /**
+   * Joueur recevant un round:start privé avec `mine: true` et exclu des votants
+   * (blindtest : le contributeur du titre). Jamais révélé aux autres.
+   */
+  secretPlayerId?: string
   /** Données privées (ex: la bonne réponse), conservées jusqu'au reveal. Jamais diffusées. */
   data?: unknown
 }

apps/server/src/handlers.ts

@@ -187,19 +187,44 @@ export function registerRoomHandlers(
       ack({ accepted: false, reason: "Soumission impossible maintenant." })
       return
     }
+    const trackId = randomUUID()
     room.blindtestTracks.push({
-      id: randomUUID(),
+      id: trackId,
       youtubeId,
       url: payload.youtubeUrl,
       title: meta.title,
       artist: meta.artist,
       submittedBy: playerId,
     })
-    const count = mine.length + 1
-    ack({ accepted: true, title: meta.title, count })
+    ack({
+      accepted: true,
+      trackId,
+      youtubeId,
+      title: meta.title,
+      count: mine.length + 1,
+    })
     broadcastState(room)
   })
 
+  socket.on("blindtest:removeTrack", (payload, ack) => {
+    const code = socket.data.roomCode
+    const playerId = socket.data.playerId
+    const room = code ? rooms.get(code) : undefined
+    if (!room || !playerId || room.status !== "lobby") {
+      ack({ ok: false })
+      return
+    }
+    const before = room.blindtestTracks.length
+    room.blindtestTracks = room.blindtestTracks.filter(
+      (t) => !(t.id === payload.trackId && t.submittedBy === playerId)
+    )
+    const removed = room.blindtestTracks.length < before
+    ack({ ok: removed })
+    if (removed) {
+      broadcastState(room)
+    }
+  })
+
   socket.on("media:control", (payload) => {
     const code = socket.data.roomCode
     const room = code ? rooms.get(code) : undefined
@@ -218,6 +243,22 @@ export function registerRoomHandlers(
     room.game.handleVote(socket.data.playerId, payload.answer)
   })
 
+  socket.on("lobby:return", () => {
+    const code = socket.data.roomCode
+    const room = code ? rooms.get(code) : undefined
+    if (!room || room.hostId !== socket.data.playerId) {
+      return
+    }
+    // Rejouer : retour au lobby, scores remis à zéro, joueurs et titres conservés.
+    room.status = "lobby"
+    room.currentRound = -1
+    room.game = null
+    for (const playerId of room.scores.keys()) {
+      room.scores.set(playerId, 0)
+    }
+    broadcastState(room)
+  })
+
   socket.on("disconnect", () => {
     const affected = rooms.handleDisconnect(socket.id)
     if (!affected) {

apps/web/src/components/blindtest-view.tsx

@@ -102,7 +102,10 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
         <DjControls ready={ready} api={api} mediaControl={mediaControl} />
       )}
 
-      {!showReveal && (
+      {!showReveal &&
+        (round?.mine ? (
+          <MisleadCard mode={snapshot.settings.blindtestMode} />
+        ) : (
           <VoteForm
             mode={snapshot.settings.blindtestMode}
             snapshot={snapshot}
@@ -110,7 +113,7 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
             disabled={hasVoted}
             onVote={voteBlindtest}
           />
-      )}
+        ))}
 
       {showReveal && truth && (
         <RevealCard
@@ -210,6 +213,20 @@ function DjControls({
   )
 }
 
+function MisleadCard({ mode }: { mode: BlindtestMode }) {
+  return (
+    <div className="border-primary/40 bg-primary/5 flex flex-col items-center gap-2 rounded-xl border p-4 text-center">
+      <span className="text-2xl">🤫</span>
+      <p className="font-heading font-bold">C'est ton titre !</p>
+      <p className="text-muted-foreground text-sm">
+        {mode === "title_artist"
+          ? "Tu ne votes pas. Savoure pendant que les autres cherchent."
+          : "Tu ne votes pas — ton but : que personne ne devine que c'est toi qui l'as ajouté. +50 par joueur trompé."}
+      </p>
+    </div>
+  )
+}
+
 function VoteForm({
   mode,
   snapshot,

apps/web/src/components/game-end-view.tsx

@@ -113,6 +113,8 @@ export function GameEndView({ snapshot }: { snapshot: RoomSnapshot }) {
   const playerId = useRoomStore((s) => s.playerId)
   const finalScores = useRoomStore((s) => s.finalScores)
   const reset = useRoomStore((s) => s.reset)
+  const returnToLobby = useRoomStore((s) => s.returnToLobby)
+  const isHost = snapshot.hostId === playerId
 
   const scores: PlayerScore[] = finalScores ?? snapshot.scores
   const ranked = [...scores].sort((a, b) => b.score - a.score)
@@ -194,11 +196,22 @@ export function GameEndView({ snapshot }: { snapshot: RoomSnapshot }) {
         </ol>
       )}
 
+      <div className="flex flex-col gap-2">
+        {isHost ? (
+          <Button className="w-full" onClick={returnToLobby}>
+            Rejouer
+          </Button>
+        ) : (
+          <p className="text-muted-foreground text-xs">
+            En attente que l'hôte relance une partie…
+          </p>
+        )}
         <Link href="/">
           <Button variant="secondary" className="w-full" onClick={reset}>
-          Retour à l'accueil
+            Quitter
           </Button>
         </Link>
       </div>
+    </div>
   )
 }

apps/web/src/components/lobby-view.tsx

@@ -1,4 +1,5 @@
 import { useState } from "react"
+import { Trash2 } from "lucide-react"
 import type {
   BlindtestMode,
   GameType,
@@ -225,6 +226,12 @@ export function LobbyView({ snapshot }: { snapshot: RoomSnapshot }) {
   )
 }
 
+interface MyTrack {
+  trackId: string
+  title: string
+  youtubeId: string
+}
+
 function TrackSubmission({
   tracksPerPlayer,
   myCount,
@@ -233,10 +240,11 @@ function TrackSubmission({
   myCount: number
 }) {
   const submitTrack = useRoomStore((s) => s.submitTrack)
+  const removeTrack = useRoomStore((s) => s.removeTrack)
   const [url, setUrl] = useState("")
   const [submitting, setSubmitting] = useState(false)
   const [feedback, setFeedback] = useState<string | null>(null)
-  const [accepted, setAccepted] = useState<string[]>([])
+  const [tracks, setTracks] = useState<MyTrack[]>([])
   const quotaReached = myCount >= tracksPerPlayer
 
   async function submit() {
@@ -246,8 +254,11 @@ function TrackSubmission({
     setSubmitting(true)
     setFeedback(null)
     const res = await submitTrack(url.trim())
-    if (res.accepted) {
-      setAccepted((a) => [...a, res.title ?? url.trim()])
+    if (res.accepted && res.trackId && res.youtubeId) {
+      setTracks((t) => [
+        ...t,
+        { trackId: res.trackId!, title: res.title ?? "", youtubeId: res.youtubeId! },
+      ])
       setUrl("")
     } else {
       setFeedback(res.reason ?? "Refusé")
@@ -255,38 +266,65 @@ function TrackSubmission({
     setSubmitting(false)
   }
 
+  async function remove(trackId: string) {
+    const ok = await removeTrack(trackId)
+    if (ok) {
+      setTracks((t) => t.filter((x) => x.trackId !== trackId))
+    }
+  }
+
   return (
     <div className="flex flex-col gap-2">
       <span className="text-sm font-medium">
         Tes titres ({myCount}/{tracksPerPlayer})
       </span>
+
+      {tracks.length > 0 && (
+        <ul className="flex flex-col gap-2">
+          {tracks.map((t) => (
+            <li
+              key={t.trackId}
+              className="bg-muted/40 flex items-center gap-3 rounded-lg p-2"
+            >
+              <img
+                src={`https://img.youtube.com/vi/${t.youtubeId}/mqdefault.jpg`}
+                alt=""
+                className="h-10 w-16 shrink-0 rounded object-cover"
+              />
+              <span className="line-clamp-2 flex-1 text-xs">{t.title}</span>
+              <Button
+                size="icon-sm"
+                variant="secondary"
+                onClick={() => remove(t.trackId)}
+                title="Supprimer"
+              >
+                <Trash2 />
+              </Button>
+            </li>
+          ))}
+        </ul>
+      )}
+
+      {!quotaReached && (
         <div className="flex gap-2">
           <input
             className={inputClass}
             placeholder="Lien YouTube"
             value={url}
-          disabled={quotaReached || submitting}
+            disabled={submitting}
             onChange={(e) => setUrl(e.target.value)}
             onKeyDown={(e) => e.key === "Enter" && submit()}
           />
           <Button
             variant="secondary"
-          disabled={quotaReached || submitting || !url.trim()}
+            disabled={submitting || !url.trim()}
             onClick={submit}
           >
             Ajouter
           </Button>
         </div>
-      {feedback && <p className="text-destructive text-xs">{feedback}</p>}
-      {accepted.length > 0 && (
-        <ul className="text-muted-foreground flex flex-col gap-0.5 text-xs">
-          {accepted.map((t, i) => (
-            <li key={i} className="truncate">
-              ✓ {t}
-            </li>
-          ))}
-        </ul>
       )}
+      {feedback && <p className="text-destructive text-xs">{feedback}</p>}
     </div>
   )
 }

apps/web/src/store/room.ts

@@ -20,6 +20,8 @@ import { socket } from "@/lib/socket"
 export interface ActiveRound {
   type: RoundStartPayload["type"]
   djId?: string
+  /** Blindtest : true si c'est MON titre (je dois faire deviner, pas voter). */
+  mine?: boolean
   startsAt: number
   endsAt: number
   payload: unknown
@@ -56,6 +58,8 @@ interface RoomState {
   updateSettings: (partial: Partial<UpdateSettingsPayload>) => void
   startGame: (rounds: RoundConfig[]) => Promise<void>
   submitTrack: (youtubeUrl: string) => Promise<SubmitOkPayload>
+  removeTrack: (trackId: string) => Promise<boolean>
+  returnToLobby: () => void
   vote: (choiceIndex: number) => void
   voteText: (text: string) => void
   voteBlindtest: (answer: BlindtestAnswer) => void
@@ -137,6 +141,15 @@ export const useRoomStore = create<RoomState>((set, get) => ({
       socket.emit("blindtest:submitTrack", { youtubeUrl }, (res) => resolve(res))
     }),
 
+  removeTrack: (trackId) =>
+    new Promise((resolve) => {
+      socket.emit("blindtest:removeTrack", { trackId }, (res) => resolve(res.ok))
+    }),
+
+  returnToLobby: () => {
+    socket.emit("lobby:return")
+  },
+
   vote: (choiceIndex) => {
     if (get().hasVoted) {
       return
@@ -189,7 +202,22 @@ export const useRoomStore = create<RoomState>((set, get) => ({
 // Listeners socket → on pousse l'état serveur dans le store (source de vérité).
 socket.on("connect", () => useRoomStore.setState({ connected: true }))
 socket.on("disconnect", () => useRoomStore.setState({ connected: false }))
-socket.on("room:state", (snapshot) => useRoomStore.setState({ snapshot }))
+socket.on("room:state", (snapshot) =>
+  useRoomStore.setState(
+    snapshot.status === "lobby"
+      ? {
+          snapshot,
+          round: null,
+          reveal: null,
+          voteProgress: null,
+          myChoiceIndex: null,
+          hasVoted: false,
+          finalScores: null,
+          mediaSync: null,
+        }
+      : { snapshot }
+  )
+)
 socket.on("error", (error) => useRoomStore.setState({ lastError: error }))
 
 socket.on("round:start", (payload) =>
@@ -197,6 +225,7 @@ socket.on("round:start", (payload) =>
     round: {
       type: payload.type,
       djId: payload.djId,
+      mine: payload.mine,
       startsAt: payload.startsAt,
       endsAt: payload.endsAt,
       payload: payload.payload,

packages/shared/src/events.ts

@@ -46,12 +46,19 @@ export interface SubmitTrackPayload {
 export interface SubmitOkPayload {
   accepted: boolean
   reason?: string
+  /** Id du titre créé (pour pouvoir le supprimer). */
+  trackId?: string
+  youtubeId?: string
   /** Titre récupéré (oEmbed) si accepté — pour confirmation côté client. */
   title?: string
   /** Nombre total de titres soumis par ce joueur après cet ajout. */
   count?: number
 }
 
+export interface RemoveTrackPayload {
+  trackId: string
+}
+
 export interface RoundStartPayload {
   type: RoundType
   djId?: string
@@ -59,6 +66,8 @@ export interface RoundStartPayload {
   startsAt: number
   /** Timestamp serveur de fin de manche (startsAt + roundDuration). */
   endsAt: number
+  /** Envoyé uniquement au contributeur du titre (blindtest) : "c'est le tien". */
+  mine?: boolean
   /** Payload spécifique au type d'épreuve, SANS la réponse. */
   payload: unknown
 }
@@ -118,11 +127,16 @@ export interface ClientToServerEvents {
   "room:create": (payload: RoomCreatePayload, ack: Ack<RoomCreatedPayload>) => void
   "room:join": (payload: RoomJoinPayload, ack: Ack<RoomCreatedPayload>) => void
   "lobby:updateSettings": (payload: UpdateSettingsPayload) => void
+  "lobby:return": () => void
   "game:start": (ack: Ack<null>) => void
   "blindtest:submitTrack": (
     payload: SubmitTrackPayload,
     ack: (res: SubmitOkPayload) => void
   ) => void
+  "blindtest:removeTrack": (
+    payload: RemoveTrackPayload,
+    ack: (res: { ok: boolean }) => void
+  ) => void
   "media:control": (payload: MediaControlPayload) => void
   "round:vote": (payload: VotePayload) => void
 }