config: bump VERSION v1.8.6

api/bridge.py

@@ -1452,3 +1452,160 @@ class Api:
             "subfolder": subfolder,
             "metadata": metadata,
         })
+
+    # ================================================================
+    # WAV -> MP3 converter
+    # ================================================================
+    def convert_pick_wav_files(self) -> list:
+        """Apre file picker multi-selezione per .wav. Ritorna list di path."""
+        if not self.window:
+            return []
+        try:
+            filetypes = ("WAV files (*.wav)",)
+            result = self.window.create_file_dialog(
+                self._open_dialog_type(),
+                allow_multiple=True,
+                file_types=filetypes,
+            )
+        except Exception:
+            return []
+        if not result:
+            return []
+        return [str(p) for p in result if str(p).lower().endswith(".wav")]
+
+    def convert_pick_wav_folder(self, recursive: bool = True) -> list:
+        """Apre folder picker, scan .wav (opzionalmente ricorsivo)."""
+        from core import converter
+        if not self.window:
+            return []
+        try:
+            result = self.window.create_file_dialog(self._folder_dialog_type())
+        except Exception:
+            return []
+        if not result:
+            return []
+        folder = str(result[0]) if isinstance(result, (list, tuple)) else str(result)
+        return converter.list_wav_files(folder, recursive=recursive)
+
+    def convert_start(self, payload: dict) -> dict:
+        """Avvia conversione batch. Payload:
+            {files: [str], bitrate: int, vbr: bool, output_dir: str | None}
+        Se output_dir e vuoto/None, il .mp3 va accanto al .wav.
+        """
+        if self._any_job_running():
+            return {"ok": False, "error": "Un'operazione e' gia in corso"}
+
+        files = payload.get("files") or []
+        if not files:
+            return {"ok": False, "error": "Nessun file selezionato"}
+
+        try:
+            bitrate = int(payload.get("bitrate", 320))
+        except (TypeError, ValueError):
+            bitrate = 320
+        if bitrate not in (128, 192, 256, 320):
+            return {"ok": False, "error": "Bitrate non valido"}
+        vbr = bool(payload.get("vbr", False))
+        output_dir = (payload.get("output_dir") or "").strip() or None
+
+        gate = self._gate("audio")
+        if gate:
+            return gate
+
+        self._download_thread = threading.Thread(
+            target=self._convert_worker,
+            args=(list(files), bitrate, vbr, output_dir),
+            daemon=True,
+        )
+        self._download_thread.start()
+        return {"ok": True}
+
+    def convert_stop(self) -> dict:
+        from core import converter as conv
+        conv.request_stop()
+        self._log("convert", "[INFO] Interruzione richiesta...")
+        return {"ok": True}
+
+    def _convert_worker(self, files: list, bitrate: int, vbr: bool,
+                        output_dir: Optional[str]) -> None:
+        from core import converter as conv
+        conv.reset_stop()
+        view = "convert"
+        total = len(files)
+        mode = "VBR" if vbr else "CBR"
+
+        self._log(view, f"[INFO] Conversione di {total} file (MP3 {bitrate}k {mode})")
+        if output_dir:
+            self._log(view, f"[INFO] Destinazione: {output_dir}")
+        else:
+            self._log(view, "[INFO] Destinazione: accanto al file originale")
+
+        _last = [0.0]
+
+        def make_progress_cb(idx: int, filename: str):
+            def cb(pct: int):
+                import time as _t
+                if pct == -1:
+                    # interruzione
+                    self._emit("convert:progress", {
+                        "idx": idx, "total": total, "file": filename,
+                        "status": "stopped", "pct": 0,
+                    })
+                    return
+                # throttle
+                now = _t.monotonic()
+                if pct < 100 and now - _last[0] < 0.10:
+                    return
+                _last[0] = now
+                self._emit("convert:progress", {
+                    "idx": idx, "total": total, "file": filename,
+                    "status": "converting" if pct < 100 else "done",
+                    "pct": pct,
+                    "overall": min(((idx + pct / 100) / total), 1.0) if total else 0,
+                })
+            return cb
+
+        for i, src_path in enumerate(files):
+            if conv.is_stopped():
+                self._log(view, "[INFO] Conversione interrotta.")
+                break
+
+            src = Path(src_path)
+            if not src.exists():
+                self._log(view, f"[ERRORE] File mancante: {src.name}")
+                continue
+
+            dst_dir = Path(output_dir) if output_dir else src.parent
+            dst = dst_dir / (src.stem + ".mp3")
+
+            # Skip se il .mp3 esiste gia (protezione contro overwrite)
+            if dst.exists():
+                self._log(view, f"[SKIP] {dst.name} esiste gia'")
+                self._emit("convert:progress", {
+                    "idx": i, "total": total, "file": src.name,
+                    "status": "skipped", "pct": 100,
+                    "overall": min(((i + 1) / total), 1.0) if total else 1,
+                })
+                continue
+
+            self._log(view, f"[CONVERTI] {src.name}")
+            self._emit("convert:progress", {
+                "idx": i, "total": total, "file": src.name,
+                "status": "converting", "pct": 0,
+            })
+
+            try:
+                conv.convert_wav_to_mp3(
+                    str(src), str(dst),
+                    bitrate=bitrate, vbr=vbr,
+                    progress_callback=make_progress_cb(i, src.name),
+                )
+                self._log(view, f"[OK] {dst.name}")
+            except Exception as e:
+                self._log(view, f"[ERRORE] {src.name}: {e}")
+                self._emit("convert:progress", {
+                    "idx": i, "total": total, "file": src.name,
+                    "status": f"error: {e}", "pct": 0,
+                })
+
+        self._emit("convert:done", {"ok": True})

core/config.py

@@ -5,7 +5,7 @@ import os
 import sys
 from pathlib import Path
 
-VERSION = "v1.8.5"
+VERSION = "v1.8.6"
 
 
 APP_NAME = "MusicTools"

core/converter.py

@@ -0,0 +1,176 @@
+"""Conversione WAV -> MP3 via ffmpeg subprocess."""
+
+from __future__ import annotations
+
+import re
+import subprocess
+import threading
+from pathlib import Path
+from typing import Callable, Optional
+
+from core.paths import find_ffmpeg_dir, subprocess_flags
+
+
+_stop_event = threading.Event()
+_current_process: Optional[subprocess.Popen] = None
+_process_lock = threading.Lock()
+
+
+def request_stop() -> None:
+    _stop_event.set()
+    with _process_lock:
+        if _current_process and _current_process.poll() is None:
+            _current_process.terminate()
+
+
+def reset_stop() -> None:
+    _stop_event.clear()
+
+
+def is_stopped() -> bool:
+    return _stop_event.is_set()
+
+
+# VBR quality mapping da bitrate label a -q:a (libmp3lame). Piu basso = migliore qualita.
+# Vedi https://trac.ffmpeg.org/wiki/Encode/MP3
+_VBR_QUALITY = {
+    128: 5,
+    192: 2,
+    256: 0,
+    320: 0,  # V0 e' ~245k medio; per >V0 c'e' solo CBR 320
+}
+
+
+def _find_ffmpeg() -> str:
+    """Trova il binario ffmpeg dentro bundle_bin o PATH.
+
+    Solleva RuntimeError se non trovato.
+    """
+    ffmpeg_dir = find_ffmpeg_dir()
+    if ffmpeg_dir:
+        for name in ("ffmpeg", "ffmpeg.exe"):
+            p = Path(ffmpeg_dir) / name
+            if p.exists():
+                return str(p)
+    # Fallback PATH
+    import shutil
+    ff = shutil.which("ffmpeg")
+    if ff:
+        return ff
+    raise RuntimeError("ffmpeg non trovato nel bundle o nel PATH")
+
+
+def convert_wav_to_mp3(
+    input_path: str,
+    output_path: str,
+    bitrate: int = 320,
+    vbr: bool = False,
+    progress_callback: Optional[Callable] = None,
+) -> None:
+    """Converte un file WAV in MP3.
+
+    Args:
+        input_path: file .wav sorgente
+        output_path: file .mp3 destinazione
+        bitrate: 128 / 192 / 256 / 320
+        vbr: True per Variable Bit Rate (-q:a), False per Constant (-b:a)
+        progress_callback: opzionale, chiamato con (percent 0..100)
+
+    Raises:
+        RuntimeError: se ffmpeg non trovato o exit non-zero.
+        FileNotFoundError: se input_path non esiste.
+    """
+    src = Path(input_path)
+    if not src.exists():
+        raise FileNotFoundError(f"File sorgente non trovato: {input_path}")
+
+    dst = Path(output_path)
+    dst.parent.mkdir(parents=True, exist_ok=True)
+
+    ffmpeg = _find_ffmpeg()
+
+    cmd = [ffmpeg, "-y", "-i", str(src)]
+    if vbr:
+        quality = _VBR_QUALITY.get(bitrate, 2)
+        cmd.extend(["-c:a", "libmp3lame", "-q:a", str(quality)])
+    else:
+        cmd.extend(["-c:a", "libmp3lame", "-b:a", f"{bitrate}k"])
+    cmd.extend([
+        "-map_metadata", "0",     # copia metadata WAV se presenti
+        "-id3v2_version", "3",
+        "-progress", "pipe:2",     # progress su stderr in formato key=value
+        str(dst),
+    ])
+
+    # Prova a ottenere la durata totale per calcolare % — leggendo lo stream INFO
+    duration_us = _probe_duration_us(ffmpeg, str(src))
+
+    global _current_process
+    with _process_lock:
+        _current_process = subprocess.Popen(
+            cmd,
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.PIPE,
+            text=True,
+            bufsize=1,
+            **subprocess_flags(),
+        )
+        proc = _current_process
+
+    try:
+        for line in proc.stderr:
+            if is_stopped():
+                proc.terminate()
+                if progress_callback:
+                    progress_callback(-1)  # segnale di interruzione
+                return
+            if not progress_callback or not duration_us:
+                continue
+            # ffmpeg -progress emette "out_time_us=<microsecondi>"
+            m = re.match(r"out_time_us=(\d+)", line.strip())
+            if m:
+                elapsed = int(m.group(1))
+                pct = min(100, int(elapsed * 100 / duration_us))
+                progress_callback(pct)
+
+        rc = proc.wait()
+
+        if rc != 0:
+            raise RuntimeError(f"ffmpeg exit {rc}")
+
+        if progress_callback:
+            progress_callback(100)
+    finally:
+        with _process_lock:
+            _current_process = None
+
+
+def _probe_duration_us(ffmpeg: str, input_path: str) -> int:
+    """Estrae la durata in microsecondi via ffmpeg -f null. Ritorna 0 se non riesce."""
+    try:
+        # ffprobe potrebbe non essere sempre bundlato; usa ffmpeg
+        result = subprocess.run(
+            [ffmpeg, "-i", input_path, "-f", "null", "-"],
+            capture_output=True,
+            text=True,
+            timeout=10,
+            **subprocess_flags(),
+        )
+        # Cerca "Duration: HH:MM:SS.ms"
+        m = re.search(r"Duration:\s+(\d+):(\d+):(\d+)\.(\d+)", result.stderr)
+        if m:
+            h, mi, s, ms = map(int, m.groups())
+            total_sec = h * 3600 + mi * 60 + s + ms / 100
+            return int(total_sec * 1_000_000)
+    except Exception:
+        pass
+    return 0
+
+
+def list_wav_files(directory: str, recursive: bool = True) -> list:
+    """Scan cartella per file .wav. Ritorna list di path stringa ordinati."""
+    root = Path(directory)
+    if not root.is_dir():
+        return []
+    pattern = "**/*.wav" if recursive else "*.wav"
+    return sorted(str(p) for p in root.glob(pattern) if p.is_file())

tests/test_converter.py

@@ -0,0 +1,104 @@
+"""Test per core.converter — file scanning + stop event.
+
+I test evitano di invocare ffmpeg reale (che potrebbe non essere in PATH
+in CI). La funzione di conversione vera e propria e' coperta manualmente.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from core import converter
+
+
+class TestListWavFiles:
+    def test_scans_recursively(self, tmp_path: Path):
+        # Struttura:
+        #   root/a.wav
+        #   root/b.WAV  (case insensitive: glob su POSIX distingue,
+        #                quindi controllo esplicito che almeno i .wav
+        #                minuscoli siano restituiti)
+        #   root/c.mp3
+        #   root/sub/d.wav
+        (tmp_path / "a.wav").write_bytes(b"RIFF")
+        (tmp_path / "c.mp3").write_bytes(b"ID3")
+        sub = tmp_path / "sub"
+        sub.mkdir()
+        (sub / "d.wav").write_bytes(b"RIFF")
+
+        got = converter.list_wav_files(str(tmp_path), recursive=True)
+
+        assert len(got) == 2
+        names = {Path(p).name for p in got}
+        assert names == {"a.wav", "d.wav"}
+        # Ordinamento stabile
+        assert got == sorted(got)
+
+    def test_non_recursive_ignores_subfolders(self, tmp_path: Path):
+        (tmp_path / "a.wav").write_bytes(b"RIFF")
+        sub = tmp_path / "sub"
+        sub.mkdir()
+        (sub / "b.wav").write_bytes(b"RIFF")
+
+        got = converter.list_wav_files(str(tmp_path), recursive=False)
+
+        assert len(got) == 1
+        assert Path(got[0]).name == "a.wav"
+
+    def test_empty_dir_returns_empty(self, tmp_path: Path):
+        assert converter.list_wav_files(str(tmp_path)) == []
+
+    def test_missing_dir_returns_empty(self, tmp_path: Path):
+        missing = tmp_path / "does-not-exist"
+        assert converter.list_wav_files(str(missing)) == []
+
+    def test_ignores_non_wav_files(self, tmp_path: Path):
+        (tmp_path / "song.mp3").write_bytes(b"ID3")
+        (tmp_path / "song.flac").write_bytes(b"fLaC")
+        (tmp_path / "notes.txt").write_text("hello")
+
+        assert converter.list_wav_files(str(tmp_path)) == []
+
+
+class TestStopEvent:
+    def setup_method(self):
+        # Ogni test parte con lo stop event pulito.
+        converter.reset_stop()
+
+    def teardown_method(self):
+        converter.reset_stop()
+
+    def test_reset_initially_not_stopped(self):
+        converter.reset_stop()
+        assert converter.is_stopped() is False
+
+    def test_request_stop_sets_flag(self):
+        converter.request_stop()
+        assert converter.is_stopped() is True
+
+    def test_reset_after_stop_clears_flag(self):
+        converter.request_stop()
+        assert converter.is_stopped() is True
+        converter.reset_stop()
+        assert converter.is_stopped() is False
+
+
+class TestConvertWavToMp3Errors:
+    def test_missing_input_raises(self, tmp_path: Path):
+        missing = tmp_path / "nope.wav"
+        out = tmp_path / "out.mp3"
+        with pytest.raises(FileNotFoundError):
+            converter.convert_wav_to_mp3(str(missing), str(out))
+
+
+class TestVbrQualityMap:
+    def test_all_bitrates_have_mapping(self):
+        for br in (128, 192, 256, 320):
+            assert br in converter._VBR_QUALITY
+
+    def test_higher_bitrate_lower_or_equal_quality_number(self):
+        # -q:a: piu' basso = migliore. Coerenza monotona sulle chiavi.
+        vals = [converter._VBR_QUALITY[br] for br in (128, 192, 256, 320)]
+        assert vals == sorted(vals, reverse=True)

webui/index.html

@@ -41,6 +41,10 @@
           <span class="nav-icon">▶</span>
           <span>YouTube</span>
         </button>
+        <button class="nav-item" data-view="convert" data-feature="audio">
+          <span class="nav-icon">🔄</span>
+          <span>Converti</span>
+        </button>
         <button class="nav-item" data-view="upgrade" data-feature="upgrade">
           <span class="nav-icon">⚡</span>
           <span>Upgrade</span>
@@ -1038,6 +1042,88 @@
         </div>
       </section>
 
+      <!-- ===== VIEW: CONVERTI (WAV -> MP3) ===== -->
+      <section class="view" id="view-convert">
+        <header class="hero hero-purple">
+          <div class="hero-content">
+            <div class="hero-eyebrow purple">WAV → MP3</div>
+            <h1 class="hero-title">Converti file WAV in MP3</h1>
+            <p class="hero-subtitle">Bitrate configurabile, CBR o VBR, output accanto al file o in cartella custom.</p>
+          </div>
+          <div class="hero-deco">🔄</div>
+        </header>
+
+        <h2 class="section-label">Sorgente</h2>
+        <div class="card">
+          <div class="beatport-header">
+            <button id="convert-pick-files" class="btn btn-primary pill">📄 Scegli file .wav</button>
+            <button id="convert-pick-folder" class="btn btn-ghost pill">📁 Scegli cartella</button>
+            <button id="convert-clear" class="btn btn-ghost pill">Svuota</button>
+          </div>
+
+          <div class="beatport-header" style="margin-top:12px;gap:16px;">
+            <label style="display:flex;gap:6px;align-items:center;color:var(--text-2);font-size:13px;">
+              Bitrate:
+              <select id="convert-bitrate" class="input pill input-sm">
+                <option value="128">128 kbps</option>
+                <option value="192">192 kbps</option>
+                <option value="256">256 kbps</option>
+                <option value="320" selected>320 kbps</option>
+              </select>
+            </label>
+            <label style="display:flex;gap:6px;align-items:center;color:var(--text-2);font-size:13px;">
+              <input type="checkbox" id="convert-vbr" />
+              <span>VBR (qualità variabile)</span>
+            </label>
+          </div>
+
+          <div class="beatport-header" style="margin-top:12px;gap:12px;">
+            <label style="display:flex;gap:6px;align-items:center;color:var(--text-2);font-size:13px;">
+              <input type="radio" name="convert-out" id="convert-out-same" checked />
+              <span>Accanto al file originale</span>
+            </label>
+            <label style="display:flex;gap:6px;align-items:center;color:var(--text-2);font-size:13px;">
+              <input type="radio" name="convert-out" id="convert-out-custom" />
+              <span>Cartella custom:</span>
+            </label>
+            <button id="convert-out-browse" class="btn btn-ghost pill btn-sm" disabled>Sfoglia…</button>
+            <span id="convert-out-path" class="beatport-output-info" style="margin:0;"></span>
+          </div>
+
+          <div id="convert-status" class="beatport-status"></div>
+        </div>
+
+        <div class="card beatport-table-card" id="convert-table-wrap" hidden>
+          <div class="beatport-table-wrap">
+            <table class="beatport-table" id="convert-table">
+              <thead>
+                <tr>
+                  <th class="col-check"><input type="checkbox" id="convert-select-all" checked /></th>
+                  <th class="col-pos">#</th>
+                  <th>File</th>
+                  <th class="col-state">Stato</th>
+                </tr>
+              </thead>
+              <tbody id="convert-tbody"></tbody>
+            </table>
+          </div>
+          <div class="beatport-toolbar" id="convert-toolbar">
+            <span class="counter" id="convert-selected-count">0/0 selezionati</span>
+            <button id="convert-run-btn" class="btn btn-primary pill" disabled>
+              <span class="ico">▶</span> Converti selezionati
+            </button>
+            <button id="convert-stop-btn" class="btn btn-danger pill" hidden>
+              <span class="ico">◼</span> Interrompi
+            </button>
+          </div>
+        </div>
+
+        <h2 class="section-label">Log</h2>
+        <div class="card log-card">
+          <div class="log" id="convert-log"></div>
+        </div>
+      </section>
+
     </main>
   </div>
 

webui/js/app.js

@@ -399,6 +399,7 @@ const logEls = {
   video: () => $("#videoLog"),
   spotify: () => $("#spotify-log"),
   youtube: () => $("#youtube-log"),
+  convert: () => $("#convert-log"),
 };
 
 function classifyLog(msg) {
@@ -510,6 +511,9 @@ async function init() {
   // Spotify + YouTube search tabs
   await SpotifyUI.init();
   await YoutubeUI.init();
+
+  // WAV -> MP3 converter tab
+  await ConvertUI.init();
 }
 
 async function refreshRecDevices() {
@@ -1948,6 +1952,228 @@ const YoutubeUI = (() => {
   return { init };
 })();
 
+// =====================================================================
+// Converti (WAV -> MP3)
+// =====================================================================
+const ConvertUI = (() => {
+  const mstate = { files: [], selected: new Set(), running: false, outputDir: "" };
+
+  function _escape(s) {
+    const d = document.createElement("div");
+    d.textContent = s == null ? "" : String(s);
+    return d.innerHTML;
+  }
+
+  function renderTable() {
+    const tbody = $("#convert-tbody");
+    if (!tbody) return;
+    tbody.innerHTML = "";
+    mstate.files.forEach((f, i) => {
+      const tr = document.createElement("tr");
+      tr.dataset.idx = String(i);
+      const checked = mstate.selected.has(i) ? "checked" : "";
+      const baseName = f.split(/[\/\\]/).pop();
+      tr.innerHTML = `
+        <td class="col-check"><input type="checkbox" data-idx="${i}" ${checked} /></td>
+        <td class="col-pos">${i + 1}</td>
+        <td title="${_escape(f)}">${_escape(baseName)}</td>
+        <td class="col-state" data-idx="${i}"></td>
+      `;
+      tr.querySelector("input[type=checkbox]").addEventListener("change", (e) => {
+        if (e.target.checked) mstate.selected.add(i);
+        else mstate.selected.delete(i);
+        updateSelectionCount();
+      });
+      tbody.appendChild(tr);
+    });
+    $("#convert-table-wrap").hidden = mstate.files.length === 0;
+    updateSelectionCount();
+  }
+
+  function updateSelectionCount() {
+    const total = mstate.files.length;
+    const sel = mstate.selected.size;
+    $("#convert-selected-count").textContent = `${sel}/${total} selezionati`;
+    $("#convert-run-btn").disabled = mstate.running || sel === 0;
+    const sa = $("#convert-select-all");
+    if (sa) {
+      sa.indeterminate = sel > 0 && sel < total;
+      sa.checked = sel === total && total > 0;
+    }
+  }
+
+  function appendFiles(newFiles) {
+    // Dedup + append
+    const existing = new Set(mstate.files);
+    for (const f of newFiles) {
+      if (!existing.has(f)) {
+        mstate.files.push(f);
+        mstate.selected.add(mstate.files.length - 1);
+        existing.add(f);
+      }
+    }
+    renderTable();
+  }
+
+  function setStatus(text, kind) {
+    const el = $("#convert-status");
+    if (!el) return;
+    el.textContent = text || "";
+    el.className = "beatport-status" + (kind ? " " + kind : "");
+  }
+
+  async function pickFiles() {
+    const files = await window.pywebview.api.convert_pick_wav_files();
+    if (Array.isArray(files) && files.length) {
+      appendFiles(files);
+      setStatus("", "");
+    } else {
+      setStatus("Nessun file .wav selezionato", "");
+    }
+  }
+
+  async function pickFolder() {
+    setStatus("Scansione cartella...", "loading");
+    const files = await window.pywebview.api.convert_pick_wav_folder(true);
+    if (Array.isArray(files) && files.length) {
+      appendFiles(files);
+      setStatus(`Trovati ${files.length} file .wav`, "ok");
+    } else {
+      setStatus("Nessun file .wav trovato nella cartella", "");
+    }
+  }
+
+  function clearFiles() {
+    mstate.files = [];
+    mstate.selected.clear();
+    renderTable();
+    setStatus("", "");
+    $("#convert-log").innerHTML = "";
+  }
+
+  async function browseOutput() {
+    const p = await window.pywebview.api.browse_directory();
+    if (p && typeof p === "string") {
+      mstate.outputDir = p;
+      $("#convert-out-path").textContent = p;
+      $("#convert-out-custom").checked = true;
+    }
+  }
+
+  function appendConvertLog(msg) {
+    const el = $("#convert-log");
+    if (!el) return;
+    const cls = classifyLog(msg);
+    const line = document.createElement("div");
+    if (cls) line.className = cls;
+    line.textContent = msg;
+    el.appendChild(line);
+    el.scrollTop = el.scrollHeight;
+  }
+
+  function updateStateCell(idx, text, cls) {
+    const td = document.querySelector(`#convert-tbody td.col-state[data-idx="${idx}"]`);
+    if (!td) return;
+    td.textContent = text;
+    td.style.color = cls === "err" ? "var(--red)" : (cls === "ok" ? "var(--green-text)" : "");
+  }
+
+  async function startConversion() {
+    const files = [...mstate.selected].sort((a, b) => a - b).map((i) => mstate.files[i]);
+    if (!files.length) return;
+    const bitrate = parseInt($("#convert-bitrate").value, 10);
+    const vbr = $("#convert-vbr").checked;
+    const useCustom = $("#convert-out-custom").checked;
+    const output_dir = useCustom ? (mstate.outputDir || "") : "";
+    if (useCustom && !output_dir) {
+      setStatus("Scegli una cartella di destinazione", "error");
+      return;
+    }
+
+    mstate.running = true;
+    $("#convert-run-btn").disabled = true;
+    $("#convert-stop-btn").hidden = false;
+    $("#convert-log").innerHTML = "";
+    // Reset state cells
+    $$("#convert-tbody td.col-state").forEach((td) => {
+      td.textContent = "";
+      td.style.color = "";
+    });
+
+    let res;
+    try {
+      res = await window.pywebview.api.convert_start({ files, bitrate, vbr, output_dir });
+    } catch (e) {
+      appendConvertLog("[ERRORE] " + ((e && e.message) || e));
+      finishConversion();
+      return;
+    }
+    if (!res || !res.ok) {
+      const errMsg = (res && res.error) || "Impossibile avviare";
+      appendConvertLog("[ERRORE] " + errMsg);
+      if (!handleGateBlock(res || {})) toast(errMsg, "error");
+      finishConversion();
+    }
+  }
+
+  async function stopConversion() {
+    try { await window.pywebview.api.convert_stop(); } catch (e) { console.error(e); }
+  }
+
+  function finishConversion() {
+    mstate.running = false;
+    $("#convert-run-btn").disabled = mstate.selected.size === 0;
+    $("#convert-stop-btn").hidden = true;
+  }
+
+  async function init() {
+    // Bind eventi
+    $("#convert-pick-files").addEventListener("click", pickFiles);
+    $("#convert-pick-folder").addEventListener("click", pickFolder);
+    $("#convert-clear").addEventListener("click", clearFiles);
+    $("#convert-out-browse").addEventListener("click", browseOutput);
+    $("#convert-out-custom").addEventListener("change", () => {
+      $("#convert-out-browse").disabled = false;
+    });
+    $("#convert-out-same").addEventListener("change", () => {
+      $("#convert-out-browse").disabled = true;
+    });
+    $("#convert-select-all").addEventListener("change", (e) => {
+      mstate.selected.clear();
+      if (e.target.checked) {
+        for (let i = 0; i < mstate.files.length; i++) mstate.selected.add(i);
+      }
+      renderTable();
+    });
+    $("#convert-run-btn").addEventListener("click", startConversion);
+    $("#convert-stop-btn").addEventListener("click", stopConversion);
+
+    // Bridge handlers per il canale "convert"
+    const origProgress = bridgeHandlers["convert:progress"];
+    bridgeHandlers["convert:progress"] = (p) => {
+      if (origProgress) origProgress(p);
+      if (!p) return;
+      if (p.status === "done") updateStateCell(p.idx, "✓ fatto", "ok");
+      else if (p.status === "skipped") updateStateCell(p.idx, "già esiste", "");
+      else if (p.status === "stopped") updateStateCell(p.idx, "interrotto", "");
+      else if (typeof p.status === "string" && p.status.startsWith("error")) updateStateCell(p.idx, "✗ errore", "err");
+      else if (p.status === "converting") updateStateCell(p.idx, `${p.pct || 0}%`, "");
+    };
+    const origDone = bridgeHandlers["convert:done"];
+    bridgeHandlers["convert:done"] = (p) => {
+      if (origDone) origDone(p);
+      if (mstate.running) {
+        appendConvertLog("[INFO] Conversione terminata.");
+        finishConversion();
+      }
+    };
+    // Il canale "log" e' gia gestito da logEls.convert (aggiunto sopra), quindi
+    // non serve wrap qui: appendLog(view=convert, msg) targeta #convert-log.
+  }
+
+  return { init };
+})();
+
 // ============================================================
 // Boot
 // ============================================================