feat: lecture des .pptx dans inputs/ via python-pptx

facilitator_v8.py

@@ -299,6 +299,34 @@ def _read_docx(path: Path) -> str:
         return ""
 
 
+def _read_pptx(path: Path) -> str:
+    """Extrait le texte (titres, corps, notes) d'un PPTX via python-pptx."""
+    try:
+        from pptx import Presentation
+        prs = Presentation(str(path))
+        chunks = []
+        for i, slide in enumerate(prs.slides, 1):
+            texts = []
+            for shape in slide.shapes:
+                if shape.has_text_frame and shape.text_frame.text.strip():
+                    texts.append(shape.text_frame.text.strip())
+                elif shape.has_table:
+                    for row in shape.table.rows:
+                        cells = [c.text.strip() for c in row.cells]
+                        if any(cells):
+                            texts.append(" | ".join(cells))
+            if slide.has_notes_slide:
+                notes = slide.notes_slide.notes_text_frame.text.strip()
+                if notes:
+                    texts.append(f"[Notes] {notes}")
+            if texts:
+                chunks.append(f"-- Slide {i} --\n" + "\n".join(texts))
+        return "\n\n".join(chunks)
+    except Exception as e:
+        warn(f"PPTX illisible ({path.name}) : {e}")
+        return ""
+
+
 def load_documents(proj: Project, already_loaded: set) -> tuple[str, set]:
     """
     Charge les fichiers de inputs/ non encore injectés.
@@ -328,6 +356,8 @@ def load_documents(proj: Project, already_loaded: set) -> tuple[str, set]:
             txt = _read_pdf(f)
         elif ext == ".docx":
             txt = _read_docx(f)
+        elif ext == ".pptx":
+            txt = _read_pptx(f)
         elif ext in (".txt", ".md", ".markdown", ".csv"):
             txt = f.read_text(encoding="utf-8", errors="replace")
         else: