feat: add fade in/out and normalize audio options to triggers; implement audio storage page

- Updated TriggerConfig and TriggerPatch models to include fade_in_seconds, fade_out_seconds, and normalize_audio fields.
- Enhanced the save_trigger route to handle new fields and validate input.
- Added a new audio storage page with upload, delete, and playback functionalities.
- Implemented UI changes in dashboard and audio storage templates to support new features.
- Introduced modals for audio playback and deletion confirmation.

.gitignore

@@ -2,4 +2,5 @@
 __pycache__
 *.pyc
 certs
-conf.json
+conf.json
+backend/data/musiques/*

arduino/README_ARDUINO.md

@@ -75,3 +75,8 @@ pio device monitor -b 115200 -p /dev/ttyUSB0
 4. Demarrer le backend.
 5. Appuyer sur le bouton.
 6. Verifier les logs backend: reception `Serial trigger received: GPIOX`.
+
+## Changelog
+
+- Le changelog global du projet est dans `../CHANGELOG.md`.
+- Les regles de mise a jour sont decrites dans `../docs/CHANGELOG_GUIDE.md`.

backend/README_BACKEND.md

@@ -27,10 +27,18 @@ backend/
 ## Prerequis
 
 - Python 3.11+
-- `ffplay` installe (paquet ffmpeg)
+- `sox` installe (commandes `play` et `soxi`)
+- `libsox-fmt-mp3` installe (support MP3 pour sox)
 - Un serveur son installé et configuré (exemple: `alsa` sur debian avec alsa-utils et configuration de la carte son)
 - acces au port serie (exemple: `/dev/ttyUSB0`)
 
+Installation audio recommandee (Debian/Ubuntu):
+
+```bash
+sudo apt update
+sudo apt install sox libsox-fmt-mp3 ffmpeg
+```
+
 ## Installation
 
 ```bash
@@ -68,7 +76,10 @@ Exemple d'entree trigger:
   "music_file": "bell.mp3",
   "start_seconds": 2.5,
   "end_seconds": 10.0,
-  "volume": 0.8
+  "volume": 80,
+  "fade_in_seconds": 0.3,
+  "fade_out_seconds": 0.4,
+  "normalize_audio": true
 }
 ```
 
@@ -134,3 +145,8 @@ sudo systemctl enable --now pysonnerie-backend
 ```
 
 Adapte les chemins `WorkingDirectory` et `ExecStart` avant activation.
+
+## Changelog
+
+- Le changelog global du projet est dans `../CHANGELOG.md`.
+- Les regles de mise a jour sont decrites dans `../docs/CHANGELOG_GUIDE.md`.

backend/app/audio_player.py

@@ -1,16 +1,21 @@
 from __future__ import annotations
 
+import logging
 import subprocess
 import threading
 from pathlib import Path
 from typing import Optional
 
 
+logger = logging.getLogger("pysonnerie.audio")
+
+
 class AudioPlayer:
     def __init__(self, music_dir: Path):
         self.music_dir = music_dir
         self._lock = threading.RLock()
         self._proc: Optional[subprocess.Popen] = None
+        self._decoder_proc: Optional[subprocess.Popen] = None
 
     def _resolve_music_path(self, music_file: str) -> Path:
         candidate = (self.music_dir / music_file).resolve()
@@ -20,32 +25,139 @@ class AudioPlayer:
             raise FileNotFoundError(f"Music file not found: {music_file}")
         return candidate
 
-    def play(self, music_file: str, start_seconds: float = 0.0, end_seconds: Optional[float] = None, volume: int = 80) -> None:
+    def _read_duration_seconds(self, music_path: Path) -> Optional[float]:
+        try:
+            result = subprocess.run(
+                ["soxi", "-D", str(music_path)],
+                capture_output=True,
+                check=True,
+                text=True,
+            )
+            return float(result.stdout.strip())
+        except (subprocess.CalledProcessError, FileNotFoundError, ValueError):
+            logger.warning("Unable to read duration with soxi for %s", music_path)
+
+        # Fallback for setups where sox lacks some codecs (e.g. mp3).
+        try:
+            result = subprocess.run(
+                [
+                    "ffprobe",
+                    "-v",
+                    "error",
+                    "-show_entries",
+                    "format=duration",
+                    "-of",
+                    "default=noprint_wrappers=1:nokey=1",
+                    str(music_path),
+                ],
+                capture_output=True,
+                check=True,
+                text=True,
+            )
+            return float(result.stdout.strip())
+        except (subprocess.CalledProcessError, FileNotFoundError, ValueError):
+            logger.warning("Unable to read duration with ffprobe for %s", music_path)
+            return None
+
+    def play(
+        self,
+        music_file: str,
+        start_seconds: float = 0.0,
+        end_seconds: Optional[float] = None,
+        volume: int = 80,
+        fade_in_seconds: float = 0.0,
+        fade_out_seconds: float = 0.0,
+        normalize_audio: bool = False,
+    ) -> None:
         with self._lock:
             music_path = self._resolve_music_path(music_file)
             self.stop()
 
-            cmd = [
-                "ffplay",
-                "-nodisp",
-                "-autoexit",
-                "-loglevel",
-                "error",
-                "-volume",
-                str(max(0, min(100, volume))),
-                "-ss",
-                str(start_seconds),
-            ]
+            if start_seconds < 0:
+                raise ValueError("start_seconds must be greater than or equal to 0")
+
+            duration: Optional[float] = None
             if end_seconds is not None:
-                duration = end_seconds - start_seconds
+                duration = float(end_seconds) - float(start_seconds)
                 if duration <= 0:
                     raise ValueError("end_seconds must be greater than start_seconds")
-                cmd += ["-t", str(duration)]
-            cmd.append(str(music_path))
-            self._proc = subprocess.Popen(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+
+            volume_factor = max(0.0, min(1.0, float(volume) / 100.0))
+            cmd = [
+                "play",
+                "-q",
+                "-v",
+                str(volume_factor),
+                str(music_path),
+            ]
+
+            effects: list[str] = []
+            if normalize_audio:
+                effects += ["gain", "-n"]
+
+            effects += ["trim", str(float(start_seconds))]
+            if duration is not None:
+                effects.append(str(duration))
+
+            fade_in = max(0.0, float(fade_in_seconds))
+            fade_out = max(0.0, float(fade_out_seconds))
+            if fade_in > 0 or fade_out > 0:
+                play_duration = duration
+                if play_duration is None:
+                    total_duration = self._read_duration_seconds(music_path)
+                    if total_duration is not None:
+                        play_duration = total_duration - float(start_seconds)
+
+                if play_duration is not None:
+                    if play_duration <= 0:
+                        raise ValueError("Playback window is empty")
+
+                    fade_in = min(fade_in, play_duration)
+                    fade_out = min(fade_out, play_duration)
+
+                    if fade_out > 0:
+                        effects += ["fade", "t", str(fade_in), str(play_duration), str(fade_out)]
+                    else:
+                        effects += ["fade", "t", str(fade_in)]
+                else:
+                    if fade_out > 0:
+                        logger.warning(
+                            "fade_out_seconds ignored for %s because duration is unknown",
+                            music_path,
+                        )
+                    effects += ["fade", "t", str(fade_in)]
+
+            # If sox lacks mp3 handlers, decode with ffmpeg and stream wav to sox.
+            if music_path.suffix.lower() == ".mp3":
+                decoder_cmd = ["ffmpeg", "-v", "error", "-i", str(music_path), "-f", "wav", "-"]
+                self._decoder_proc = subprocess.Popen(
+                    decoder_cmd,
+                    stdout=subprocess.PIPE,
+                    stderr=subprocess.DEVNULL,
+                )
+                cmd += ["-t", "wav", "-"] + effects
+                self._proc = subprocess.Popen(
+                    cmd,
+                    stdin=self._decoder_proc.stdout,
+                    stdout=subprocess.DEVNULL,
+                    stderr=subprocess.DEVNULL,
+                )
+                if self._decoder_proc.stdout is not None:
+                    self._decoder_proc.stdout.close()
+            else:
+                cmd += [str(music_path)] + effects
+                self._proc = subprocess.Popen(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
 
     def stop(self) -> None:
         with self._lock:
+            if self._decoder_proc and self._decoder_proc.poll() is None:
+                self._decoder_proc.terminate()
+                try:
+                    self._decoder_proc.wait(timeout=2)
+                except subprocess.TimeoutExpired:
+                    self._decoder_proc.kill()
+            self._decoder_proc = None
+
             if self._proc and self._proc.poll() is None:
                 self._proc.terminate()
                 try:

backend/app/main.py

@@ -65,10 +65,32 @@ def _play_from_trigger(trigger_id: str) -> Dict[str, object]:
         start_seconds=float(trigger.get("start_seconds", 0.0) or 0.0),
         end_seconds=trigger.get("end_seconds"),
         volume=int(trigger.get("volume", 80)),
+        fade_in_seconds=float(trigger.get("fade_in_seconds", 0.0) or 0.0),
+        fade_out_seconds=float(trigger.get("fade_out_seconds", 0.0) or 0.0),
+        normalize_audio=bool(trigger.get("normalize_audio", False)),
     )
     return trigger
 
 
+def _normalize_text(value: object) -> str:
+    return str(value or "").strip().lower()
+
+
+def _ensure_unique_trigger_identity(
+    triggers: Dict[str, object],
+    current_id: str,
+    candidate_type: str,
+    candidate_name: str,
+) -> None:
+    for existing_id, existing_trigger in triggers.items():
+        if existing_id == current_id or not isinstance(existing_trigger, dict):
+            continue
+        if existing_trigger.get("type") == candidate_type:
+            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Trigger type already used")
+        if _normalize_text(existing_trigger.get("name")) == _normalize_text(candidate_name):
+            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Trigger name already used")
+
+
 @app.on_event("startup")
 def startup_event() -> None:
     global serial_listener
@@ -101,6 +123,9 @@ def _serial_callback(raw_message: str) -> TriggerLogInfo | None:
             start_seconds=float(trigger.get("start_seconds", 0.0) or 0.0),
             end_seconds=trigger.get("end_seconds"),
             volume=int(trigger.get("volume", 80)),
+            fade_in_seconds=float(trigger.get("fade_in_seconds", 0.0) or 0.0),
+            fade_out_seconds=float(trigger.get("fade_out_seconds", 0.0) or 0.0),
+            normalize_audio=bool(trigger.get("normalize_audio", False)),
         )
 
         info: TriggerLogInfo = {"key": trigger_key}
@@ -131,11 +156,11 @@ def list_triggers() -> Dict[str, object]:
 
 @app.put("/api/triggers/{trigger_id}", dependencies=[Depends(auth_required)])
 def upsert_trigger(trigger_id: str, payload: TriggerConfig) -> Dict[str, object]:
-    if payload.type != trigger_id:
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="trigger_id must match payload.type",
-        )
+    config = config_store.get_copy()
+    triggers = config.get("triggers", {})
+    if not isinstance(triggers, dict):
+        triggers = {}
+    _ensure_unique_trigger_identity(triggers, trigger_id, payload.type, payload.name)
     return config_store.upsert_trigger(trigger_id, payload.model_dump())
 
 
@@ -152,6 +177,17 @@ def patch_trigger(trigger_id: str, payload: TriggerPatch) -> Dict[str, object]:
     candidate = {**existing, **updates}
     TriggerConfig.model_validate(candidate)
 
+    config = config_store.get_copy()
+    triggers = config.get("triggers", {})
+    if not isinstance(triggers, dict):
+        triggers = {}
+    _ensure_unique_trigger_identity(
+        triggers,
+        trigger_id,
+        str(candidate.get("type", "")),
+        str(candidate.get("name", "")),
+    )
+
     try:
         return config_store.patch_trigger(trigger_id, updates)
     except KeyError:
@@ -173,6 +209,8 @@ def force_play(trigger_id: str) -> Dict[str, str]:
         _play_from_trigger(trigger_id)
     except KeyError:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Unknown trigger")
+    except (FileNotFoundError, ValueError, RuntimeError) as exc:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
     return {"status": "playing"}
 
 

backend/app/models.py

@@ -12,6 +12,9 @@ class TriggerConfig(BaseModel):
     start_seconds: Optional[float] = Field(default=0.0, ge=0)
     end_seconds: Optional[float] = Field(default=None, ge=0)
     volume: int = Field(default=80, ge=0, le=100)
+    fade_in_seconds: float = Field(default=0.0, ge=0)
+    fade_out_seconds: float = Field(default=0.0, ge=0)
+    normalize_audio: bool = Field(default=False)
 
     @field_validator("end_seconds")
     @classmethod
@@ -29,6 +32,9 @@ class TriggerPatch(BaseModel):
     start_seconds: Optional[float] = Field(default=None, ge=0)
     end_seconds: Optional[float] = Field(default=None, ge=0)
     volume: Optional[int] = Field(default=None, ge=0, le=100)
+    fade_in_seconds: Optional[float] = Field(default=None, ge=0)
+    fade_out_seconds: Optional[float] = Field(default=None, ge=0)
+    normalize_audio: Optional[bool] = Field(default=None)
 
 
 class ForcePlayRequest(BaseModel):

frontend/README_FRONTEND.md

@@ -99,3 +99,8 @@ Le frontend sera alors servi par Gunicorn sur l'adresse definie par `FRONTEND_BI
 - Le frontend appelle le backend en HTTPS avec certificat autosigne (`verify=False`).
 - Les fichiers audio sont manipules localement dans `backend/data/musiques`.
 - Formats audio acceptes: `.mp3`, `.wav`, `.ogg`, `.flac`, `.aac`, `.m4a`.
+
+## Changelog
+
+- Le changelog global du projet est dans `../CHANGELOG.md`.
+- Les regles de mise a jour sont decrites dans `../docs/CHANGELOG_GUIDE.md`.

frontend/app/routes.py

@@ -65,6 +65,31 @@ def _parse_optional_float(value: str) -> float | None:
     return float(clean)
 
 
+def _next_numeric_trigger_id(triggers: dict[str, dict]) -> str:
+    max_id = 0
+    for key in triggers:
+        if key.isdigit():
+            max_id = max(max_id, int(key))
+    return str(max_id + 1)
+
+
+def _normalize_key(value: str) -> str:
+    return value.strip().lower()
+
+
+def _audio_redirect_target() -> str:
+    if request.form.get("return_to", "").strip() == "audio_storage":
+        return url_for("ui.audio_storage")
+    return url_for("ui.dashboard")
+
+
+def _trigger_sort_key(item: tuple[str, dict]) -> tuple[int, int | str]:
+    trigger_id = item[0]
+    if trigger_id.isdigit():
+        return (0, int(trigger_id))
+    return (1, trigger_id.lower())
+
+
 @ui.get("/")
 def home() -> Response:
     if _backend_client() is None:
@@ -121,7 +146,8 @@ def dashboard() -> str | Response:
     triggers: dict[str, dict] = {}
     try:
         raw = client.list_triggers()
-        triggers = {k: v for k, v in raw.items() if isinstance(v, dict)}
+        valid_triggers = {k: v for k, v in raw.items() if isinstance(v, dict)}
+        triggers = dict(sorted(valid_triggers.items(), key=_trigger_sort_key))
     except BackendApiError as exc:
         flash(f"Impossible de charger les triggers: {exc}", "error")
 
@@ -136,6 +162,16 @@ def dashboard() -> str | Response:
     )
 
 
+@ui.get("/audio-storage")
+def audio_storage() -> str | Response:
+    client_or_redirect = _ensure_login()
+    if isinstance(client_or_redirect, Response):
+        return client_or_redirect
+
+    audio_files = _list_audio_files()
+    return render_template("audio_storage.html", audio_files=audio_files)
+
+
 @ui.post("/trigger/save")
 def save_trigger() -> Response:
     client_or_redirect = _ensure_login()
@@ -152,6 +188,9 @@ def save_trigger() -> Response:
     start_raw = request.form.get("start_seconds", "0")
     end_raw = request.form.get("end_seconds", "")
     volume_raw = request.form.get("volume", "80")
+    fade_in_raw = request.form.get("fade_in_seconds", "0")
+    fade_out_raw = request.form.get("fade_out_seconds", "0")
+    normalize_audio = request.form.get("normalize_audio") in {"on", "true", "1"}
 
     def _err(msg: str) -> Response:
         if request.headers.get("X-Requested-With") == "fetch":
@@ -169,8 +208,10 @@ def save_trigger() -> Response:
         start_seconds = float(start_raw)
         end_seconds = _parse_optional_float(end_raw)
         volume = int(volume_raw)
+        fade_in_seconds = float(fade_in_raw)
+        fade_out_seconds = float(fade_out_raw)
     except ValueError:
-        return _err("Les temps de debut/fin et le volume doivent être numériques.")
+        return _err("Les temps de debut/fin, fondus et le volume doivent être numériques.")
 
     if start_seconds < 0 or (end_seconds is not None and end_seconds <= start_seconds):
         return _err("Fenêtre temporelle invalide.")
@@ -178,6 +219,9 @@ def save_trigger() -> Response:
     if not (0 <= volume <= 100):
         return _err("Le volume doit être compris entre 0 et 100.")
 
+    if fade_in_seconds < 0 or fade_out_seconds < 0:
+        return _err("Les durées de fondu doivent être supérieures ou égales à 0.")
+
     payload = {
         "name": name,
         "type": trigger_type,
@@ -185,14 +229,29 @@ def save_trigger() -> Response:
         "start_seconds": start_seconds,
         "end_seconds": end_seconds,
         "volume": volume,
+        "fade_in_seconds": fade_in_seconds,
+        "fade_out_seconds": fade_out_seconds,
+        "normalize_audio": normalize_audio,
     }
 
     try:
-        if original_id and original_id != trigger_type:
-            client.upsert_trigger(trigger_type, payload)
-            client.delete_trigger(original_id)
+        existing_raw = client.list_triggers()
+        existing_triggers = {k: v for k, v in existing_raw.items() if isinstance(v, dict)}
+
+        if original_id and original_id in existing_triggers:
+            trigger_id = original_id
         else:
-            client.upsert_trigger(trigger_type, payload)
+            trigger_id = _next_numeric_trigger_id(existing_triggers)
+
+        for existing_id, existing_trigger in existing_triggers.items():
+            if existing_id == trigger_id:
+                continue
+            if existing_trigger.get("type") == trigger_type:
+                return _err("Ce type de trigger est déjà utilisé.")
+            if _normalize_key(str(existing_trigger.get("name", ""))) == _normalize_key(name):
+                return _err("Ce nom de trigger est déjà utilisé.")
+
+        client.upsert_trigger(trigger_id, payload)
     except BackendApiError as exc:
         if request.headers.get("X-Requested-With") == "fetch":
             return jsonify({"ok": False, "error": str(exc)}), 502
@@ -202,12 +261,12 @@ def save_trigger() -> Response:
     if request.headers.get("X-Requested-With") == "fetch":
         return jsonify({
             "ok": True,
-            "message": f"Trigger {trigger_type} enregistre.",
-            "trigger_id": trigger_type,
-            "original_id": original_id or trigger_type,
+            "message": f"Trigger \"{name}\" enregistré.",
+            "trigger_id": trigger_id,
+            "original_id": original_id or trigger_id,
             "trigger": payload,
         })
-    flash(f"Trigger {trigger_type} enregistré.", "success")
+    flash(f"Trigger \"{name}\" enregistré.", "success")
     return redirect(url_for("ui.dashboard"))
 
 
@@ -230,8 +289,8 @@ def delete_trigger() -> Response:
     try:
         client.delete_trigger(trigger_id)
         if request.headers.get("X-Requested-With") == "fetch":
-            return jsonify({"ok": True, "message": f"Trigger {trigger_id} supprime.", "trigger_id": trigger_id})
-        flash(f"Trigger {trigger_id} supprime.", "success")
+            return jsonify({"ok": True, "message": "Trigger supprimé.", "trigger_id": trigger_id})
+        flash("Trigger supprimé.", "success")
     except BackendApiError as exc:
         if request.headers.get("X-Requested-With") == "fetch":
             return jsonify({"ok": False, "error": f"Echec de suppression: {exc}"}), 500
@@ -258,8 +317,8 @@ def play_trigger() -> Response:
     try:
         client.play_trigger(trigger_id)
         if request.headers.get("X-Requested-With") == "fetch":
-            return jsonify({"ok": True, "message": f"Trigger {trigger_id} demarre."})
-        flash(f"Trigger {trigger_id} demarré.", "success")
+            return jsonify({"ok": True, "message": "Trigger démarré."})
+        flash("Trigger démarré.", "success")
     except BackendApiError as exc:
         if request.headers.get("X-Requested-With") == "fetch":
             return jsonify({"ok": False, "error": str(exc)}), 502
@@ -297,27 +356,27 @@ def upload_audio() -> Response:
     audio = request.files.get("audio_file")
     if audio is None or audio.filename is None or audio.filename.strip() == "":
         flash("Sélectionnez d'abord un fichier.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     filename = secure_filename(audio.filename)
     if filename == "":
         flash("Nom de fichier invalide.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     ext = Path(filename).suffix.lower()
     if ext not in ALLOWED_AUDIO_EXTENSIONS:
         flash("Format audio non supporté.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     existing_names = {item.name.lower() for item in _music_dir().iterdir() if item.is_file()}
     if filename.lower() in existing_names:
         flash("Un fichier avec ce nom existe déjà.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     destination = _music_dir() / filename
     audio.save(destination)
     flash(f"Fichier {filename} téléversé.", "success")
-    return redirect(url_for("ui.dashboard"))
+    return redirect(_audio_redirect_target())
 
 
 @ui.post("/audio/delete")
@@ -329,16 +388,16 @@ def delete_audio() -> Response:
     filename = request.form.get("filename", "").strip()
     if not filename:
         flash("Nom de fichier manquant.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     target = _music_dir() / filename
     if not target.exists() or not target.is_file():
         flash("Fichier introuvable.", "error")
-        return redirect(url_for("ui.dashboard"))
+        return redirect(_audio_redirect_target())
 
     target.unlink()
     flash(f"Fichier {filename} supprimé.", "success")
-    return redirect(url_for("ui.dashboard"))
+    return redirect(_audio_redirect_target())
 
 
 @ui.get("/audio/download/<path:filename>")

frontend/app/templates/audio_storage.html

@@ -0,0 +1,237 @@
+{% extends "base.html" %}
+
+{% block content %}
+  <header class="topbar reveal">
+    <div>
+      <h1>Stockage audio</h1>
+    </div>
+    <div class="topbar-actions">
+      <a href="{{ url_for('ui.dashboard') }}" class="ghost-link">Retour au tableau de bord</a>
+      <a href="{{ url_for('ui.logout') }}" class="ghost-link">Déconnexion</a>
+    </div>
+  </header>
+
+  <main class="dashboard-grid">
+    <section class="panel reveal delay-1" style="grid-column: span 12;">
+      <form method="post" action="{{ url_for('ui.upload_audio') }}" enctype="multipart/form-data" class="upload-row" id="upload-audio-form">
+        <input type="hidden" name="return_to" value="audio_storage" />
+        <input type="file" name="audio_file" id="audio_file_input" accept=".mp3,.wav,.ogg,.flac,.aac,.m4a" required />
+        <button type="submit">Téléverser</button>
+      </form>
+
+      {% if audio_files %}
+        <ul class="audio-list">
+          {% for filename in audio_files %}
+            <li>
+              <span>{{ filename }}</span>
+              <div class="audio-actions">
+                <button
+                  type="button"
+                  class="small-button js-play-browser"
+                  data-audio-url="{{ url_for('ui.stream_audio', filename=filename) }}"
+                  data-audio-name="{{ filename }}"
+                >
+                  Lire
+                </button>
+                <a href="{{ url_for('ui.download_audio', filename=filename) }}" class="small-button">Télécharger</a>
+                <form method="post" action="{{ url_for('ui.delete_audio') }}" class="inline-form js-delete-audio-form" data-filename="{{ filename }}">
+                  <input type="hidden" name="filename" value="{{ filename }}" />
+                  <input type="hidden" name="return_to" value="audio_storage" />
+                  <button type="submit" class="small danger">Supprimer</button>
+                </form>
+              </div>
+            </li>
+          {% endfor %}
+        </ul>
+      {% else %}
+        <p class="muted">Aucun fichier audio dans le stockage.</p>
+      {% endif %}
+    </section>
+  </main>
+
+  <div class="modal-backdrop" id="duplicate-name-modal" aria-hidden="true">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="duplicate-name-title">
+      <h3 id="duplicate-name-title">Nom déjà utilisé</h3>
+      <p id="duplicate-name-message">Ce nom existe déjà dans les fichiers enregistrés.</p>
+      <div class="modal-actions">
+        <button type="button" class="ghost-link" id="duplicate-name-close">Fermer</button>
+      </div>
+    </div>
+  </div>
+
+  <div class="modal-backdrop" id="delete-audio-modal" aria-hidden="true">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="delete-audio-title">
+      <h3 id="delete-audio-title">Confirmer la suppression</h3>
+      <p id="delete-audio-message">Voulez-vous vraiment supprimer ce fichier ?</p>
+      <div class="modal-actions">
+        <button type="button" class="ghost-link" id="delete-audio-cancel">Annuler</button>
+        <button type="button" class="danger" id="delete-audio-confirm">Supprimer</button>
+      </div>
+    </div>
+  </div>
+
+  <div class="modal-backdrop" id="browser-audio-modal" aria-hidden="true">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="browser-audio-title">
+      <h3 id="browser-audio-title">Lecture audio</h3>
+      <div class="audio-player-card">
+        <p id="audio-now-playing" class="muted">Aucune lecture en cours.</p>
+        <audio id="browser-audio-player" controls preload="metadata"></audio>
+        <p class="audio-time" id="audio-time">Temps de lecture: 00:00 / 00:00</p>
+      </div>
+      <div class="modal-actions">
+        <button type="button" class="ghost-link" id="browser-audio-close">Fermer</button>
+      </div>
+    </div>
+  </div>
+
+  <script>
+    (function () {
+      const player = document.getElementById("browser-audio-player");
+      const timeLabel = document.getElementById("audio-time");
+      const nowPlaying = document.getElementById("audio-now-playing");
+      const modal = document.getElementById("browser-audio-modal");
+      const closeBtn = document.getElementById("browser-audio-close");
+      if (!player || !timeLabel || !nowPlaying || !modal || !closeBtn) return;
+
+      const openModal = () => {
+        modal.classList.add("is-open");
+        modal.setAttribute("aria-hidden", "false");
+      };
+
+      const closeModal = () => {
+        player.pause();
+        modal.classList.remove("is-open");
+        modal.setAttribute("aria-hidden", "true");
+      };
+
+      const formatTime = (seconds) => {
+        if (!Number.isFinite(seconds) || seconds < 0) return "00:00";
+        const total = Math.floor(seconds);
+        const minutes = Math.floor(total / 60);
+        const remain = total % 60;
+        return String(minutes).padStart(2, "0") + ":" + String(remain).padStart(2, "0");
+      };
+
+      const updateTimeLabel = () => {
+        const current = formatTime(player.currentTime || 0);
+        const total = formatTime(player.duration || 0);
+        timeLabel.textContent = "Temps de lecture: " + current + " / " + total;
+      };
+
+      player.addEventListener("timeupdate", updateTimeLabel);
+      player.addEventListener("loadedmetadata", updateTimeLabel);
+      player.addEventListener("ended", updateTimeLabel);
+
+      const playButtons = document.querySelectorAll(".js-play-browser");
+      playButtons.forEach((button) => {
+        button.addEventListener("click", () => {
+          const src = button.dataset.audioUrl;
+          const name = button.dataset.audioName || "Fichier audio";
+          if (!src) return;
+
+          if (player.src !== src) {
+            player.src = src;
+          }
+          player.play().catch(() => {});
+          nowPlaying.textContent = "Lecture: " + name;
+          updateTimeLabel();
+          openModal();
+        });
+      });
+
+      closeBtn.addEventListener("click", closeModal);
+      modal.addEventListener("click", (event) => {
+        if (event.target === modal) closeModal();
+      });
+      document.addEventListener("keydown", (event) => {
+        if (event.key === "Escape" && modal.classList.contains("is-open")) closeModal();
+      });
+    })();
+
+    (function () {
+      const uploadForm = document.getElementById("upload-audio-form");
+      const fileInput = document.getElementById("audio_file_input");
+      const duplicateModal = document.getElementById("duplicate-name-modal");
+      const duplicateClose = document.getElementById("duplicate-name-close");
+      if (!uploadForm || !fileInput || !duplicateModal || !duplicateClose) return;
+
+      const existing = new Set([
+        {% for filename in audio_files %}
+          "{{ filename|lower|replace('\\', '\\\\')|replace('"', '\\"') }}",
+        {% endfor %}
+      ]);
+
+      const openDuplicateModal = () => {
+        duplicateModal.classList.add("is-open");
+        duplicateModal.setAttribute("aria-hidden", "false");
+        duplicateClose.focus();
+      };
+
+      const closeDuplicateModal = () => {
+        duplicateModal.classList.remove("is-open");
+        duplicateModal.setAttribute("aria-hidden", "true");
+      };
+
+      uploadForm.addEventListener("submit", (event) => {
+        const file = fileInput.files && fileInput.files[0];
+        if (!file) return;
+
+        if (existing.has(file.name.toLowerCase())) {
+          event.preventDefault();
+          openDuplicateModal();
+        }
+      });
+
+      duplicateClose.addEventListener("click", closeDuplicateModal);
+      duplicateModal.addEventListener("click", (event) => {
+        if (event.target === duplicateModal) closeDuplicateModal();
+      });
+      document.addEventListener("keydown", (event) => {
+        if (event.key === "Escape" && duplicateModal.classList.contains("is-open")) closeDuplicateModal();
+      });
+    })();
+
+    (function () {
+      const modal = document.getElementById("delete-audio-modal");
+      const message = document.getElementById("delete-audio-message");
+      const cancelBtn = document.getElementById("delete-audio-cancel");
+      const confirmBtn = document.getElementById("delete-audio-confirm");
+      if (!modal || !message || !cancelBtn || !confirmBtn) return;
+
+      let pendingForm = null;
+
+      const openModal = (form, filename) => {
+        pendingForm = form;
+        message.textContent = "Voulez-vous vraiment supprimer le fichier \"" + filename + "\" ?";
+        modal.classList.add("is-open");
+        modal.setAttribute("aria-hidden", "false");
+        confirmBtn.focus();
+      };
+
+      const closeModal = () => {
+        modal.classList.remove("is-open");
+        modal.setAttribute("aria-hidden", "true");
+        pendingForm = null;
+      };
+
+      document.querySelectorAll(".js-delete-audio-form").forEach((form) => {
+        form.addEventListener("submit", (event) => {
+          event.preventDefault();
+          const filename = form.dataset.filename || "ce fichier";
+          openModal(form, filename);
+        });
+      });
+
+      cancelBtn.addEventListener("click", closeModal);
+      modal.addEventListener("click", (event) => {
+        if (event.target === modal) closeModal();
+      });
+      confirmBtn.addEventListener("click", () => {
+        if (pendingForm) pendingForm.submit();
+      });
+      document.addEventListener("keydown", (event) => {
+        if (event.key === "Escape" && modal.classList.contains("is-open")) closeModal();
+      });
+    })();
+  </script>
+{% endblock %}

frontend/app/templates/base.html

@@ -322,6 +322,19 @@ button.small {
   accent-color: var(--brand);
 }
 
+.normalize-row {
+  display: flex;
+  align-items: center;
+  gap: 0.55rem;
+}
+
+.normalize-row input[type="checkbox"] {
+  width: auto;
+  margin: 0;
+  padding: 0;
+  flex-shrink: 0;
+}
+
 .table-wrap {
   overflow-x: auto;
 }

frontend/app/templates/dashboard.html

@@ -7,6 +7,7 @@
     </div>
     <div class="topbar-actions">
       <button type="button" class="danger" id="btn-stop-audio">Arrêter l'audio</button>
+      <a href="{{ url_for('ui.audio_storage') }}" class="ghost-link">Stockage audio</a>
       <a href="{{ url_for('ui.logout') }}" class="ghost-link">Déconnexion</a>
     </div>
   </header>
@@ -15,10 +16,7 @@
     <section class="panel reveal delay-1">
       <h2>Ajouter ou modifier un trigger</h2>
       <form method="post" action="{{ url_for('ui.save_trigger') }}" class="form-grid" id="trigger-form">
-        <label>
-          Identifiant du trigger existant (optionnel)
-          <input type="text" name="original_id" id="original_id" placeholder="GPIO3" />
-        </label>
+        <input type="hidden" name="original_id" id="original_id" />
         <label>
           Type du trigger (obligatoire)
           <input type="text" name="type" id="trigger_type" placeholder="GPIO3" required />
@@ -58,6 +56,20 @@
           <span>Volume : <span id="trigger_volume_display">80</span>%</span>
           <input type="range" min="0" max="100" name="volume" id="trigger_volume" value="80" />
         </label>
+        <div class="time-row">
+          <label>
+            Fade in (s)
+            <input type="number" step="0.1" min="0" name="fade_in_seconds" id="fade_in_seconds" value="0" />
+          </label>
+          <label>
+            Fade out (s)
+            <input type="number" step="0.1" min="0" name="fade_out_seconds" id="fade_out_seconds" value="0" />
+          </label>
+        </div>
+        <label class="normalize-row">
+          <input type="checkbox" name="normalize_audio" id="normalize_audio" />
+          Normaliser le niveau sonore
+        </label>
         <button type="submit">Enregistrer le trigger</button>
       </form>
     </section>
@@ -73,13 +85,15 @@
         >
           <thead>
             <tr>
-              <th>ID</th>
               <th>Nom</th>
               <th>Type</th>
               <th>Audio</th>
               <th>Début</th>
               <th>Fin</th>
               <th>Volume</th>
+              <th>Fade in</th>
+              <th>Fade out</th>
+              <th>Normalisation</th>
               <th>Actions</th>
             </tr>
           </thead>
@@ -94,15 +108,20 @@
                 data-trigger-start="{{ trigger.get('start_seconds', 0) }}"
                 data-trigger-end="{{ '' if trigger.get('end_seconds') is none else trigger.get('end_seconds') }}"
                 data-trigger-volume="{{ trigger.get('volume', 80) }}"
+                data-trigger-fade-in="{{ trigger.get('fade_in_seconds', 0.0) }}"
+                data-trigger-fade-out="{{ trigger.get('fade_out_seconds', 0.0) }}"
+                data-trigger-normalize="{{ 1 if trigger.get('normalize_audio', false) else 0 }}"
                 title="Cliquer pour charger ce trigger dans le formulaire"
               >
-                <td>{{ trigger_id }}</td>
                 <td>{{ trigger.get('name', '') }}</td>
                 <td>{{ trigger.get('type', '') }}</td>
                 <td>{{ trigger.get('music_file', '') }}</td>
                 <td>{{ trigger.get('start_seconds', 0) }}</td>
                 <td>{{ trigger.get('end_seconds', '') }}</td>
                 <td>{{ trigger.get('volume', 80) }}</td>
+                <td>{{ trigger.get('fade_in_seconds', 0.0) }}</td>
+                <td>{{ trigger.get('fade_out_seconds', 0.0) }}</td>
+                <td>{{ 'Oui' if trigger.get('normalize_audio', false) else 'Non' }}</td>
                 <td>
                   <button
                     type="button"
@@ -123,46 +142,6 @@
       </div>
     </section>
 
-    <section class="panel reveal delay-3">
-      <h2>Stockage audio</h2>
-      <div class="audio-player-card">
-        <p id="audio-now-playing" class="muted">Aucune lecture en cours.</p>
-        <audio id="browser-audio-player" controls preload="metadata"></audio>
-        <p class="audio-time" id="audio-time">Temps de lecture: 00:00 / 00:00</p>
-      </div>
-
-      <form method="post" action="{{ url_for('ui.upload_audio') }}" enctype="multipart/form-data" class="upload-row" id="upload-audio-form">
-        <input type="file" name="audio_file" id="audio_file_input" accept=".mp3,.wav,.ogg,.flac,.aac,.m4a" required />
-        <button type="submit">Téléverser</button>
-      </form>
-
-      {% if audio_files %}
-        <ul class="audio-list">
-          {% for filename in audio_files %}
-            <li>
-              <span>{{ filename }}</span>
-              <div class="audio-actions">
-                <button
-                  type="button"
-                  class="small-button js-play-browser"
-                  data-audio-url="{{ url_for('ui.stream_audio', filename=filename) }}"
-                  data-audio-name="{{ filename }}"
-                >
-                  Lire
-                </button>
-                <a href="{{ url_for('ui.download_audio', filename=filename) }}" class="small-button">Télécharger</a>
-                <form method="post" action="{{ url_for('ui.delete_audio') }}" class="inline-form js-delete-audio-form" data-filename="{{ filename }}">
-                  <input type="hidden" name="filename" value="{{ filename }}" />
-                  <button type="submit" class="small danger">Supprimer</button>
-                </form>
-              </div>
-            </li>
-          {% endfor %}
-        </ul>
-      {% else %}
-        <p class="muted">Aucun fichier audio dans le stockage.</p>
-      {% endif %}
-    </section>
   </main>
 
   <div class="modal-backdrop" id="delete-audio-modal" aria-hidden="true">
@@ -187,6 +166,21 @@
     </div>
   </div>
 
+  <div class="modal-backdrop" id="launch-trigger-modal" aria-hidden="true">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="launch-trigger-title">
+      <h3 id="launch-trigger-title">Avertissement audio</h3>
+      <p id="launch-trigger-message">La musique va être jouée sur la sortie audio. Continuer ?</p>
+      <label class="normalize-row" for="launch-trigger-dont-show">
+        <input type="checkbox" id="launch-trigger-dont-show" />
+        Ne plus réafficher cet avertissement
+      </label>
+      <div class="modal-actions">
+        <button type="button" class="ghost-link" id="launch-trigger-cancel">Annuler</button>
+        <button type="button" id="launch-trigger-confirm">Lancer</button>
+      </div>
+    </div>
+  </div>
+
   <div class="modal-backdrop" id="duplicate-name-modal" aria-hidden="true">
     <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="duplicate-name-title">
       <h3 id="duplicate-name-title">Nom déjà utilisé</h3>
@@ -197,7 +191,23 @@
     </div>
   </div>
 
+  <div class="modal-backdrop" id="browser-audio-modal" aria-hidden="true">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="browser-audio-title">
+      <h3 id="browser-audio-title">Lecture audio</h3>
+      <div class="audio-player-card">
+        <p id="audio-now-playing" class="muted">Aucune lecture en cours.</p>
+        <audio id="browser-audio-player" controls preload="metadata"></audio>
+        <p class="audio-time" id="audio-time">Temps de lecture: 00:00 / 00:00</p>
+      </div>
+      <div class="modal-actions">
+        <button type="button" class="ghost-link" id="browser-audio-close">Fermer</button>
+      </div>
+    </div>
+  </div>
+
   <script>
+    const SKIP_LAUNCH_WARNING_KEY = "pysonnerie_skip_launch_trigger_warning";
+
     function showFlash(message, category) {
       let stack = document.querySelector(".flash-stack");
       if (!stack) {
@@ -218,6 +228,71 @@
       }, 3600);
     }
 
+    function confirmTriggerLaunch(triggerName) {
+      const skipWarning = localStorage.getItem(SKIP_LAUNCH_WARNING_KEY) === "1";
+      if (skipWarning) {
+        return Promise.resolve(true);
+      }
+
+      const modal = document.getElementById("launch-trigger-modal");
+      const message = document.getElementById("launch-trigger-message");
+      const dontShow = document.getElementById("launch-trigger-dont-show");
+      const cancelBtn = document.getElementById("launch-trigger-cancel");
+      const confirmBtn = document.getElementById("launch-trigger-confirm");
+      if (!modal || !message || !dontShow || !cancelBtn || !confirmBtn) {
+        return Promise.resolve(true);
+      }
+
+      message.textContent = "La musique va être jouée sur la sortie audio" +
+        (triggerName ? " pour \"" + triggerName + "\"" : "") + ". Continuer ?";
+      dontShow.checked = false;
+
+      return new Promise((resolve) => {
+        let done = false;
+
+        const cleanup = () => {
+          modal.classList.remove("is-open");
+          modal.setAttribute("aria-hidden", "true");
+          cancelBtn.removeEventListener("click", onCancel);
+          confirmBtn.removeEventListener("click", onConfirm);
+          modal.removeEventListener("click", onBackdropClick);
+          document.removeEventListener("keydown", onKeydown);
+        };
+
+        const finish = (ok) => {
+          if (done) return;
+          done = true;
+          if (ok && dontShow.checked) {
+            localStorage.setItem(SKIP_LAUNCH_WARNING_KEY, "1");
+          }
+          cleanup();
+          resolve(ok);
+        };
+
+        const onCancel = () => finish(false);
+        const onConfirm = () => finish(true);
+        const onBackdropClick = (event) => {
+          if (event.target === modal) {
+            finish(false);
+          }
+        };
+        const onKeydown = (event) => {
+          if (event.key === "Escape" && modal.classList.contains("is-open")) {
+            finish(false);
+          }
+        };
+
+        cancelBtn.addEventListener("click", onCancel);
+        confirmBtn.addEventListener("click", onConfirm);
+        modal.addEventListener("click", onBackdropClick);
+        document.addEventListener("keydown", onKeydown);
+
+        modal.classList.add("is-open");
+        modal.setAttribute("aria-hidden", "false");
+        confirmBtn.focus();
+      });
+    }
+
     function upsertTriggerRow(data) {
       const tbody = document.getElementById("triggers-tbody");
       const tableWrap = document.getElementById("triggers-table-wrap");
@@ -238,6 +313,9 @@
       }
 
       const endVal = (t.end_seconds != null && t.end_seconds !== "") ? t.end_seconds : "";
+      const fadeInVal = t.fade_in_seconds != null ? t.fade_in_seconds : 0;
+      const fadeOutVal = t.fade_out_seconds != null ? t.fade_out_seconds : 0;
+      const normalizeVal = !!t.normalize_audio;
 
       let row = tbody.querySelector(`tr[data-trigger-id="${CSS.escape(triggerId)}"]`);
       if (!row) {
@@ -258,6 +336,10 @@
           set("start_seconds", row.dataset.triggerStart || "0");
           set("end_seconds", row.dataset.triggerEnd || "");
           set("trigger_volume", row.dataset.triggerVolume || "80");
+          set("fade_in_seconds", row.dataset.triggerFadeIn || "0");
+          set("fade_out_seconds", row.dataset.triggerFadeOut || "0");
+          const normalize = document.getElementById("normalize_audio");
+          if (normalize) normalize.checked = (row.dataset.triggerNormalize === "1");
           document.getElementById("trigger_type")?.focus();
           f.scrollIntoView({ behavior: "smooth", block: "start" });
         });
@@ -270,15 +352,20 @@
       row.dataset.triggerStart = t.start_seconds != null ? t.start_seconds : "0";
       row.dataset.triggerEnd = endVal;
       row.dataset.triggerVolume = t.volume != null ? t.volume : 80;
+      row.dataset.triggerFadeIn = fadeInVal;
+      row.dataset.triggerFadeOut = fadeOutVal;
+      row.dataset.triggerNormalize = normalizeVal ? "1" : "0";
 
       row.innerHTML = `
-        <td>${triggerId}</td>
         <td>${t.name || ""}</td>
         <td>${t.type || ""}</td>
         <td>${t.music_file || ""}</td>
         <td>${t.start_seconds != null ? t.start_seconds : 0}</td>
         <td>${endVal}</td>
         <td>${t.volume != null ? t.volume : 80}</td>
+        <td>${fadeInVal}</td>
+        <td>${fadeOutVal}</td>
+        <td>${normalizeVal ? "Oui" : "Non"}</td>
         <td>
           <button type="button" class="small js-play-trigger"
             data-trigger-id="${triggerId}"
@@ -290,10 +377,15 @@
       // Rebrancher le listener du bouton Lancer
       const playBtn = row.querySelector(".js-play-trigger");
       if (playBtn) {
-        playBtn.addEventListener("click", () => {
+        playBtn.addEventListener("click", async () => {
           const tid = playBtn.dataset.triggerId;
           const url = playBtn.dataset.playUrl;
           if (!tid || !url) return;
+
+          const rowName = row.dataset.triggerName || "";
+          const ok = await confirmTriggerLaunch(rowName);
+          if (!ok) return;
+
           playBtn.disabled = true;
           const body = new URLSearchParams({ trigger_id: tid });
           fetch(url, {
@@ -342,11 +434,16 @@
 
     (function () {
       document.querySelectorAll(".js-play-trigger").forEach((btn) => {
-        btn.addEventListener("click", () => {
+        btn.addEventListener("click", async () => {
           const triggerId = btn.dataset.triggerId;
           const url = btn.dataset.playUrl;
           if (!triggerId || !url) return;
 
+          const row = btn.closest("tr");
+          const triggerName = row?.dataset.triggerName || "";
+          const ok = await confirmTriggerLaunch(triggerName);
+          if (!ok) return;
+
           btn.disabled = true;
           const body = new URLSearchParams({ trigger_id: triggerId });
           fetch(url, {
@@ -384,6 +481,9 @@
       const endInput = document.getElementById("end_seconds");
       const volumeInput = document.getElementById("trigger_volume");
       const volumeDisplay = document.getElementById("trigger_volume_display");
+      const fadeInInput = document.getElementById("fade_in_seconds");
+      const fadeOutInput = document.getElementById("fade_out_seconds");
+      const normalizeInput = document.getElementById("normalize_audio");
       if (volumeInput && volumeDisplay) {
         volumeInput.addEventListener("input", () => { volumeDisplay.textContent = volumeInput.value; });
       }
@@ -433,6 +533,9 @@
             volumeInput.value = row.dataset.triggerVolume || "80";
             if (volumeDisplay) volumeDisplay.textContent = volumeInput.value;
           }
+          if (fadeInInput) fadeInInput.value = row.dataset.triggerFadeIn || "0";
+          if (fadeOutInput) fadeOutInput.value = row.dataset.triggerFadeOut || "0";
+          if (normalizeInput) normalizeInput.checked = (row.dataset.triggerNormalize === "1");
 
           typeInput?.focus();
           form.scrollIntoView({ behavior: "smooth", block: "start" });
@@ -444,7 +547,20 @@
       const player = document.getElementById("browser-audio-player");
       const timeLabel = document.getElementById("audio-time");
       const nowPlaying = document.getElementById("audio-now-playing");
-      if (!player || !timeLabel || !nowPlaying) return;
+      const modal = document.getElementById("browser-audio-modal");
+      const closeBtn = document.getElementById("browser-audio-close");
+      if (!player || !timeLabel || !nowPlaying || !modal || !closeBtn) return;
+
+      const openModal = () => {
+        modal.classList.add("is-open");
+        modal.setAttribute("aria-hidden", "false");
+      };
+
+      const closeModal = () => {
+        player.pause();
+        modal.classList.remove("is-open");
+        modal.setAttribute("aria-hidden", "true");
+      };
 
       const formatTime = (seconds) => {
         if (!Number.isFinite(seconds) || seconds < 0) return "00:00";
@@ -478,8 +594,21 @@
           });
           nowPlaying.textContent = "Lecture: " + name;
           updateTimeLabel();
+          openModal();
         });
       });
+
+      closeBtn.addEventListener("click", closeModal);
+      modal.addEventListener("click", (event) => {
+        if (event.target === modal) {
+          closeModal();
+        }
+      });
+      document.addEventListener("keydown", (event) => {
+        if (event.key === "Escape" && modal.classList.contains("is-open")) {
+          closeModal();
+        }
+      });
     })();
 
     (function () {
@@ -593,10 +722,13 @@
       if (!modal || !message || !cancelBtn || !confirmBtn || !tbody) return;
 
       let pendingTriggerId = null;
+      let pendingTriggerName = "ce trigger";
 
       const openModal = (triggerId) => {
         pendingTriggerId = triggerId;
-        message.textContent = `Voulez-vous vraiment supprimer le trigger "${triggerId}" ?`;
+        const row = tbody.querySelector(`tr[data-trigger-id="${CSS.escape(triggerId)}"]`);
+        pendingTriggerName = row?.dataset.triggerName || "ce trigger";
+        message.textContent = `Voulez-vous vraiment supprimer le trigger "${pendingTriggerName}" ?`;
         modal.classList.add("is-open");
         modal.setAttribute("aria-hidden", "false");
         confirmBtn.focus();
@@ -606,6 +738,7 @@
         modal.classList.remove("is-open");
         modal.setAttribute("aria-hidden", "true");
         pendingTriggerId = null;
+        pendingTriggerName = "ce trigger";
       };
 
       tbody.addEventListener("click", (event) => {
@@ -660,18 +793,159 @@
       const btn = document.getElementById("btn-preview-trigger-audio");
       if (!select || !btn) return;
 
+      let previewContext = null;
+      let previewSource = null;
+
+      const stopPreview = () => {
+        if (previewSource) {
+          try {
+            previewSource.stop();
+          } catch (_) {}
+          previewSource = null;
+        }
+      };
+
+      const asNonNegative = (input, fallback) => {
+        const value = Number.parseFloat(input?.value ?? "");
+        if (!Number.isFinite(value) || value < 0) return fallback;
+        return value;
+      };
+
+      const computeNormalizeGain = (audioBuffer, startOffset, playDuration) => {
+        const sampleRate = audioBuffer.sampleRate;
+        const startFrame = Math.max(0, Math.floor(startOffset * sampleRate));
+        const endFrame = Math.min(audioBuffer.length, Math.ceil((startOffset + playDuration) * sampleRate));
+        if (endFrame <= startFrame) return 1;
+
+        let peak = 0;
+        for (let c = 0; c < audioBuffer.numberOfChannels; c += 1) {
+          const channel = audioBuffer.getChannelData(c);
+          for (let i = startFrame; i < endFrame; i += 1) {
+            const abs = Math.abs(channel[i]);
+            if (abs > peak) peak = abs;
+          }
+        }
+        if (peak <= 0) return 1;
+        return Math.min(1, 0.95 / peak);
+      };
+
       btn.addEventListener("click", () => {
         const filename = select.value;
         if (!filename) return;
+
         const streamBase = select.dataset.streamUrl || "";
         const url = streamBase.replace("__FILE__", encodeURIComponent(filename));
         const player = document.getElementById("browser-audio-player");
         const nowPlaying = document.getElementById("audio-now-playing");
-        if (!player) return;
-        player.src = url;
-        player.play().catch(() => {});
-        if (nowPlaying) nowPlaying.textContent = "Lecture: " + filename;
-        player.closest("section")?.scrollIntoView({ behavior: "smooth", block: "nearest" });
+        const startInput = document.getElementById("start_seconds");
+        const endInput = document.getElementById("end_seconds");
+        const volumeInput = document.getElementById("trigger_volume");
+        const fadeInInput = document.getElementById("fade_in_seconds");
+        const fadeOutInput = document.getElementById("fade_out_seconds");
+        const normalizeInput = document.getElementById("normalize_audio");
+
+        const startSeconds = asNonNegative(startInput, 0);
+        const endSecondsRaw = Number.parseFloat(endInput?.value ?? "");
+        const hasEnd = Number.isFinite(endSecondsRaw) && endSecondsRaw > 0;
+        const volume = asNonNegative(volumeInput, 80);
+        const fadeInSeconds = asNonNegative(fadeInInput, 0);
+        const fadeOutSeconds = asNonNegative(fadeOutInput, 0);
+        const normalizeAudio = !!normalizeInput?.checked;
+
+        btn.disabled = true;
+
+        if (player) {
+          player.pause();
+          player.removeAttribute("src");
+          player.load();
+        }
+        stopPreview();
+
+        if (!previewContext) {
+          const Ctx = window.AudioContext || window.webkitAudioContext;
+          if (!Ctx) {
+            showFlash("Prévisualisation avancée non supportée par ce navigateur.", "error");
+            btn.disabled = false;
+            return;
+          }
+          previewContext = new Ctx();
+        }
+
+        if (previewContext.state === "suspended") {
+          previewContext.resume().catch(() => {});
+        }
+
+        fetch(url)
+          .then((res) => {
+            if (!res.ok) throw new Error("Téléchargement audio impossible");
+            return res.arrayBuffer();
+          })
+          .then((arr) => previewContext.decodeAudioData(arr))
+          .then((audioBuffer) => {
+            const duration = audioBuffer.duration;
+            if (!(startSeconds < duration)) {
+              throw new Error("Le début dépasse la durée du fichier.");
+            }
+
+            const requestedEnd = hasEnd ? endSecondsRaw : duration;
+            const clampedEnd = Math.min(duration, requestedEnd);
+            if (!(clampedEnd > startSeconds)) {
+              throw new Error("La fin doit être supérieure au début.");
+            }
+
+            const playDuration = clampedEnd - startSeconds;
+            const source = previewContext.createBufferSource();
+            source.buffer = audioBuffer;
+            const gainNode = previewContext.createGain();
+            source.connect(gainNode);
+            gainNode.connect(previewContext.destination);
+
+            const normalizeGain = normalizeAudio ? computeNormalizeGain(audioBuffer, startSeconds, playDuration) : 1;
+            const baseGain = Math.max(0, Math.min(1, volume / 100)) * normalizeGain;
+
+            const now = previewContext.currentTime;
+            const startAt = now + 0.03;
+            const endAt = startAt + playDuration;
+
+            const fadeIn = Math.min(Math.max(0, fadeInSeconds), playDuration);
+            const fadeOut = Math.min(Math.max(0, fadeOutSeconds), playDuration);
+            const fadeOutStart = Math.max(startAt + fadeIn, endAt - fadeOut);
+
+            gainNode.gain.cancelScheduledValues(now);
+            gainNode.gain.setValueAtTime(0, now);
+            if (fadeIn > 0) {
+              gainNode.gain.linearRampToValueAtTime(baseGain, startAt + fadeIn);
+            } else {
+              gainNode.gain.setValueAtTime(baseGain, startAt);
+            }
+            if (fadeOut > 0) {
+              gainNode.gain.setValueAtTime(baseGain, fadeOutStart);
+              gainNode.gain.linearRampToValueAtTime(0.0001, endAt);
+            } else {
+              gainNode.gain.setValueAtTime(baseGain, endAt);
+            }
+
+            source.onended = () => {
+              if (previewSource === source) {
+                previewSource = null;
+              }
+            };
+
+            previewSource = source;
+            source.start(startAt, startSeconds, playDuration);
+
+            if (nowPlaying) {
+              nowPlaying.textContent = "Prévisualisation: " + filename +
+                " (" + startSeconds.toFixed(1) + "s -> " + clampedEnd.toFixed(1) + "s)";
+            }
+            player?.closest("section")?.scrollIntoView({ behavior: "smooth", block: "nearest" });
+          })
+          .catch((err) => {
+            showFlash(err?.message || "Prévisualisation impossible.", "error");
+          })
+          .finally(() => {
+            btn.disabled = false;
+          });
       });
     })();
   </script>