feat(site): sync naming typewriter to last subtitle cue

Replace the audio "ended"-based trigger with an SRT-driven one: the
typewriter now starts (lastCue.endTime - typewriterDuration) seconds
into the dialogue so the final letter lands at the moment the
narrator finishes speaking. Char delay shortened from 110ms to 70ms
for a snappier reveal. Fallbacks: audio "ended" when no SRT, 8s
absolute timer otherwise.

src/components/site/SiteNamingScreen.tsx

@@ -1,59 +1,133 @@
-import { useCallback, useEffect, useRef, useState } from "react";
+import { useEffect, useState } from "react";
 import { useGameStore } from "@/managers/stores/useGameStore";
 import { useSiteStore } from "@/managers/stores/useSiteStore";
+import { useSettingsStore } from "@/managers/stores/useSettingsStore";
 import { SiteButton } from "@/components/site/SiteButton";
 import { SITE_CONFIG } from "@/data/site/siteConfig";
 import { SITE_DIALOGUE_IDS } from "@/data/site/dialogueIds";
-import { loadDialogueManifest } from "@/utils/dialogues/loadDialogueManifest";
+import {
+  loadDialogueManifest,
+  loadDialogueSubtitleCues,
+} from "@/utils/dialogues/loadDialogueManifest";
 import {
   playDialogueById,
   stopCurrentDialogue,
 } from "@/utils/dialogues/playDialogue";
 
+const TYPEWRITER_CHAR_DELAY_MS = 70;
+// Fallback in case nothing else triggers the typewriter (audio failed to
+// load, no subtitles, "ended" never fires). Long enough not to fire
+// before the narration on a slow load.
+const AUDIO_END_FALLBACK_MS = 8000;
+
 /**
- * Screen 3: Name input
- * The displayed name is forced to SITE_CONFIG.presetPlayerName — the
- * field reveals one letter per keystroke until the preset name is complete.
+ * Screen 3: Name reveal
+ * The player's preset name is revealed letter-by-letter inside the input
+ * once the naming dialogue finishes playing. The confirm button stays
+ * locked until the reveal completes. No user typing — the input is
+ * read-only and just acts as a typewriter target.
  */
 export function SiteNamingScreen(): React.JSX.Element {
   const setStep = useSiteStore((state) => state.setStep);
   const setPlayerName = useGameStore((state) => state.setPlayerName);
-  const [charIndex, setCharIndex] = useState(0);
-  const inputRef = useRef<HTMLInputElement>(null);
+  const [revealedChars, setRevealedChars] = useState(0);
+  const [typewriterStarted, setTypewriterStarted] = useState(false);
 
   const presetPlayerName = SITE_CONFIG.presetPlayerName;
-  const displayValue = presetPlayerName.slice(0, charIndex);
-  const isComplete = charIndex >= presetPlayerName.length;
+  const displayValue = presetPlayerName.slice(0, revealedChars);
+  const isComplete = revealedChars >= presetPlayerName.length;
 
+  // Play the dialogue, then trigger the typewriter so it FINISHES at the
+  // same moment the narration ends. We compute that moment from the SRT
+  // cues: the last cue's endTime is where the narrator stops speaking,
+  // so we start typing `typewriterDuration` before that.
   useEffect(() => {
     let cancelled = false;
+    let audioElement: HTMLAudioElement | null = null;
+    let onTimeUpdate: (() => void) | null = null;
+    let fallbackTimer: ReturnType<typeof setTimeout> | null = null;
+
+    const start = (): void => {
+      if (cancelled) return;
+      setTypewriterStarted(true);
+    };
+
+    const typewriterDurationSec =
+      (TYPEWRITER_CHAR_DELAY_MS * presetPlayerName.length) / 1000;
 
     void (async () => {
       const manifest = await loadDialogueManifest();
-      if (cancelled || !manifest) return;
-      await playDialogueById(manifest, SITE_DIALOGUE_IDS.naming);
+      if (cancelled) return;
+      if (!manifest) {
+        start();
+        return;
+      }
+
+      // Resolve the dialogue + its SRT cues for the active subtitle language.
+      const dialogue = manifest.dialogues.find(
+        (item) => item.id === SITE_DIALOGUE_IDS.naming,
+      );
+      const language = useSettingsStore.getState().subtitleLanguage;
+      const subtitleData = dialogue
+        ? await loadDialogueSubtitleCues(manifest, dialogue, language)
+        : null;
+      if (cancelled) return;
+
+      audioElement = await playDialogueById(manifest, SITE_DIALOGUE_IDS.naming);
+      if (cancelled) return;
+      if (!audioElement) {
+        start();
+        return;
+      }
+
+      const lastCue = subtitleData?.cues[subtitleData.cues.length - 1];
+      if (lastCue) {
+        // Trigger so the typewriter ends at the narration's end.
+        const audio = audioElement;
+        const triggerAt = Math.max(0, lastCue.endTime - typewriterDurationSec);
+        onTimeUpdate = (): void => {
+          if (audio.currentTime >= triggerAt) {
+            audio.removeEventListener("timeupdate", onTimeUpdate!);
+            start();
+          }
+        };
+        audio.addEventListener("timeupdate", onTimeUpdate);
+      } else {
+        // No SRT data — fall back to the audio "ended" event.
+        audioElement.addEventListener("ended", start, { once: true });
+      }
+
+      fallbackTimer = setTimeout(start, AUDIO_END_FALLBACK_MS);
     })();
 
     return () => {
       cancelled = true;
+      if (fallbackTimer !== null) clearTimeout(fallbackTimer);
+      if (audioElement) {
+        if (onTimeUpdate) {
+          audioElement.removeEventListener("timeupdate", onTimeUpdate);
+        }
+        audioElement.removeEventListener("ended", start);
+      }
       stopCurrentDialogue();
     };
-  }, []);
+  }, [presetPlayerName.length]);
 
+  // Reveal the preset name one character at a time once the typewriter
+  // has been triggered.
   useEffect(() => {
-    inputRef.current?.focus();
-  }, []);
-
-  const handleNameChange = useCallback(
-    (event: React.ChangeEvent<HTMLInputElement>): void => {
-      const nextLength = Math.min(
-        event.target.value.length,
-        presetPlayerName.length,
-      );
-      setCharIndex(nextLength);
-    },
-    [presetPlayerName.length],
-  );
+    if (!typewriterStarted) return;
+    const interval = setInterval(() => {
+      setRevealedChars((current) => {
+        if (current >= presetPlayerName.length) {
+          clearInterval(interval);
+          return current;
+        }
+        return current + 1;
+      });
+    }, TYPEWRITER_CHAR_DELAY_MS);
+    return () => clearInterval(interval);
+  }, [typewriterStarted, presetPlayerName.length]);
 
   const handleConfirm = (): void => {
     if (isComplete) {
@@ -98,17 +172,16 @@ export function SiteNamingScreen(): React.JSX.Element {
             margin: 0,
           }}
         >
-          Quel est votre prénom ?
+          Je suis…
         </h2>
 
         <input
-          ref={inputRef}
           type="text"
           value={displayValue}
-          onChange={handleNameChange}
-          placeholder="Écrivez votre prénom ici"
+          readOnly
+          tabIndex={-1}
           aria-labelledby="player-name-label"
-          aria-describedby="player-name-hint"
+          aria-live="polite"
           autoComplete="off"
           style={{
             display: "flex",
@@ -122,30 +195,12 @@ export function SiteNamingScreen(): React.JSX.Element {
             background: "#D9D9D9",
             outline: "none",
             color: "#333",
-            caretColor: "#333",
             fontFamily: "Inter, system-ui, sans-serif",
             fontSize: "clamp(16px, 2.5vw, 20px)",
             textAlign: "left",
             boxSizing: "border-box",
           }}
         />
-        <span
-          id="player-name-hint"
-          style={{
-            position: "absolute",
-            width: 1,
-            height: 1,
-            padding: 0,
-            margin: -1,
-            overflow: "hidden",
-            clip: "rect(0, 0, 0, 0)",
-            whiteSpace: "nowrap",
-            border: 0,
-          }}
-        >
-          Votre personnage s&apos;appelle {presetPlayerName}. Tapez{" "}
-          {presetPlayerName.length} caractères pour révéler son nom.
-        </span>
       </div>
 
       <SiteButton