Update app.py

app.py

@@ -1,7 +1,7 @@
 """
-app.py — Step 7
-- Admin can upload .txt/.pdf/.html to data/seed/ and reindex
-- Q&A uses retrieval + Evo templated synthesis from earlier steps
+app.py — Step 8
+Adds a simple toggle to choose Extractive (safe) or Generative (Evo),
+plus temperature and max_tokens controls.
 """
 
 from pathlib import Path
@@ -41,8 +41,7 @@ def _save_files(files: List[gr.File]) -> List[str]:
             elif isinstance(f, str): path = Path(f)
             if not path or not path.exists(): continue
             if path.suffix.lower() not in ALLOWED_EXTS: continue
-            dest = DATA_SEED_DIR / path.name
-            dest.write_bytes(path.read_bytes())
+            (DATA_SEED_DIR / path.name).write_bytes(path.read_bytes())
             saved.append(path.name)
         except: continue
     return saved
@@ -53,14 +52,23 @@ def on_upload_and_reindex(files):
     status = on_build_index()
     return f"Uploaded: {', '.join(saved)}\n{status}"
 
-def on_ask(question: str, top_k: int, lang_code: str, history: list):
+def on_ask(question: str, top_k: int, lang_code: str, mode_label: str, temp: float, max_tokens: int, history: list):
     lang = normalize_lang(lang_code)
     if not question or len(question.strip()) < 3:
         return history, L(lang,"intro_err"), f"{L(lang,'sources')}: (none)", "", ""
     try:
         searcher = ensure_searcher()
         hits = searcher.search(question, k=int(top_k))
-        answer = synthesize_with_evo(question, lang, hits)  # templated synthesis (Step 5)
+        # Map UI label to internal arg
+        mode = "generative" if mode_label.startswith("Generative") else "extractive"
+
+        answer = synthesize_with_evo(
+            question, lang, hits,
+            mode=mode,
+            max_new_tokens=int(max_tokens),
+            temperature=float(temp),
+        )
+
         srcs = format_sources(hits)
         if srcs.startswith("Sources:"): srcs = srcs.replace("Sources:", f"{L(lang,'sources')}:")
         all_links = extract_links(hits)
@@ -76,8 +84,9 @@ def on_ask(question: str, top_k: int, lang_code: str, history: list):
     return history, answer, srcs, links_md, forms_md
 
 with gr.Blocks(title=L("en","title")) as demo:
-    gr.Markdown(f"# 🇲🇺 **{L('en','title')}** — Step 7")
+    gr.Markdown(f"# 🇲🇺 **{L('en','title')}** — Step 8")
 
+    # Admin
     with gr.Row():
         build_btn = gr.Button(L("en","build_btn"))
         status = gr.Markdown(L("en","status_idle"))
@@ -89,9 +98,20 @@ with gr.Blocks(title=L("en","title")) as demo:
         upload_status = gr.Markdown()
         save_btn.click(fn=on_upload_and_reindex, inputs=upload, outputs=upload_status)
 
+    # User controls
     gr.Markdown("### Language / Langue / Langaz")
     lang = gr.Dropdown(choices=list(SUPPORTED.keys()), value="en", label="EN / FR / MFE")
 
+    gr.Markdown("### Answer mode & controls")
+    with gr.Row():
+        mode = gr.Radio(
+            choices=["Extractive (safe)", "Generative (Evo)"],
+            value="Extractive (safe)",
+            label="Mode"
+        )
+        temp = gr.Slider(0.0, 1.2, value=0.4, step=0.05, label="Temperature (gen)")
+        max_tokens = gr.Slider(64, 384, value=192, step=16, label="Max new tokens (gen)")
+
     gr.Markdown("### Ask a question / Posez une question / Poz enn kestyon")
     with gr.Row():
         q = gr.Textbox(placeholder=L("en","ask_placeholder"), label=L("en","ask_label"))
@@ -104,7 +124,15 @@ with gr.Blocks(title=L("en","title")) as demo:
     links_md = gr.Markdown()
     forms_md = gr.Markdown()
 
-    ask_btn.click(fn=on_ask, inputs=[q, k, lang, chat], outputs=[chat, answer_md, sources_md, links_md, forms_md])
-    q.submit(fn=on_ask, inputs=[q, k, lang, chat], outputs=[chat, answer_md, sources_md, links_md, forms_md])
+    ask_btn.click(
+        fn=on_ask,
+        inputs=[q, k, lang, mode, temp, max_tokens, chat],
+        outputs=[chat, answer_md, sources_md, links_md, forms_md],
+    )
+    q.submit(
+        fn=on_ask,
+        inputs=[q, k, lang, mode, temp, max_tokens, chat],
+        outputs=[chat, answer_md, sources_md, links_md, forms_md],
+    )
 
 demo.launch()