fix: replace Coqui/ROCm with Piper TTS (simpler, local, CPU)

ai/Dockerfile

@@ -16,8 +16,7 @@ RUN apt-get update && \
         texlive-latex-base texlive-latex-extra texlive-fonts-recommended texlive-xetex texlive-science \
         qemu-user-static binfmt-support qemu-user-binfmt \
         emacs-nox \
-        libportaudio2 \
-        hipcc espeak-ng && \
+        libportaudio2 && \
     rm -rf /var/lib/apt/lists/*
 
 # Création de l'utilisateur 'hermes' directement avec les bons accès
@@ -31,74 +30,6 @@ WORKDIR /opt/hermes
 # On donne la propriété du dossier de travail à l'utilisateur hermes
 RUN chown hermes:hermes /opt/hermes
 
-# ---------- Coqui TTS venv (Python 3.11 + PyTorch ROCm) ----------
-# Install Python 3.11 via uv for Coqui compatibility
-RUN uv python install 3.11
-
-# Create the coqui venv and install PyTorch ROCm + TTS
-RUN uv venv --python 3.11 /opt/coqui-tts
-RUN uv pip install --python /opt/coqui-tts/bin/python3 --no-cache-dir \
-    torch==2.3.1+rocm5.7 \
-    torchaudio==2.3.1+rocm5.7 \
-    --index-url https://download.pytorch.org/whl/rocm5.7
-RUN uv pip install --python /opt/coqui-tts/bin/python3 --no-cache-dir TTS setuptools
-
-# Fix executable stack on bundled torch AMD libraries (required for ROCm)
-RUN /opt/coqui-tts/bin/python3 -c "
-import struct, os, glob
-torch_lib = '/opt/coqui-tts/lib/python3.11/site-packages/torch/lib'
-for so in glob.glob(os.path.join(torch_lib, '*.so*')):
-    try:
-        with open(so, 'r+b') as f:
-            if f.read(4) != b'\x7fELF': continue
-            f.seek(0)
-            h = f.read(64)
-            e_phoff = struct.unpack_from('<Q', h, 0x20)[0]
-            e_phentsize = struct.unpack_from('<H', h, 0x36)[0]
-            e_phnum = struct.unpack_from('<H', h, 0x38)[0]
-            for i in range(e_phnum):
-                f.seek(e_phoff + i * e_phentsize)
-                ph = f.read(e_phentsize)
-                if struct.unpack_from('<I', ph, 0)[0] == 0x6474e551:
-                    flags = struct.unpack_from('<I', ph, 4)[0]
-                    if flags & 1:
-                        f.seek(e_phoff + i * e_phentsize + 4)
-                        f.write(struct.pack('<I', flags - 1))
-                    break
-    except: pass
-"
-
-# Créer le wrapper Coqui synth
-RUN /opt/coqui-tts/bin/python3 -c "
-script = '''#!/usr/bin/env python3
-import argparse, sys
-def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument('--text', required=True)
-    parser.add_argument('--out', required=True)
-    parser.add_argument('--model', default='tts_models/en/vctk/vits')
-    parser.add_argument('--speaker', default='')
-    parser.add_argument('--gpu', action='store_true', default=True)
-    args = parser.parse_args()
-    try:
-        from TTS.api import TTS
-        tts = TTS(model_name=args.model, progress_bar=False, gpu=args.gpu)
-        kwargs = {'text': args.text, 'file_path': args.out}
-        if args.speaker and hasattr(tts, 'speakers') and tts.speakers:
-            kwargs['speaker'] = args.speaker
-        tts.tts_to_file(**kwargs)
-        print('OK:' + args.out)
-    except Exception as e:
-        print('ERROR:' + str(e), file=sys.stderr)
-        sys.exit(1)
-if __name__ == '__main__':
-    main()
-'''
-with open('/opt/coqui-tts/bin/coqui_synth.py', 'w') as f:
-    f.write(script)
-import os; os.chmod('/opt/coqui-tts/bin/coqui_synth.py', 0o755)
-"
-
 # ---------- Hermes venv ----------
 # Passer immédiatement sous l'utilisateur hermes pour tout le reste du build
 USER hermes