fix: async ingestion with generator yield + chat history double-count

app.py

@@ -476,38 +476,30 @@ with gr.Blocks(css=CUSTOM_CSS, theme=dark_theme, title="NotebookLM", js=BEFOREUN
     )
 
     # ── Sources: File upload ─────────────────────────────────────────────────
+    def handle_upload_and_ingest(files, state):
+        state, _, _, _ = handle_file_upload(files, state)
+        yield refresh_all(state)          # UI updates immediately — sources show "Processing..."
+        run_ingestion_pipeline(state)     # Slow: extract, chunk, embed
+        yield refresh_all(state)          # UI updates again — sources show "Ready"
+
     file_uploader.upload(
-        fn=handle_file_upload,
+        fn=handle_upload_and_ingest,
         inputs=[file_uploader, user_state],
-        outputs=[user_state, source_list_html, source_header, source_selector],
-        api_name=False,
-    ).then(
-        fn=run_ingestion_pipeline,
-        inputs=[user_state],
-        outputs=[user_state, source_list_html, source_header, source_selector],
-        api_name=False,
-    ).then(
-        fn=refresh_all,
-        inputs=[user_state],
         outputs=refresh_outputs,
         api_name=False,
     ).then(fn=None, js=MARK_DIRTY_JS)
 
     # ── Sources: Add URL ─────────────────────────────────────────────────────
+    def handle_url_add_and_ingest(url, state):
+        state, _, _, _, _ = handle_url_add(url, state)
+        yield refresh_all(state) + ("",)  # UI updates immediately + clear URL input
+        run_ingestion_pipeline(state)     # Slow: extract, chunk, embed
+        yield refresh_all(state) + ("",)  # UI updates again — source shows "Ready"
+
     add_url_btn.click(
-        fn=handle_url_add,
+        fn=handle_url_add_and_ingest,
         inputs=[url_input, user_state],
-        outputs=[user_state, source_list_html, source_header, url_input, source_selector],
-        api_name=False,
-    ).then(
-        fn=run_ingestion_pipeline,
-        inputs=[user_state],
-        outputs=[user_state, source_list_html, source_header, source_selector],
-        api_name=False,
-    ).then(
-        fn=refresh_all,
-        inputs=[user_state],
-        outputs=refresh_outputs,
+        outputs=refresh_outputs + [url_input],
         api_name=False,
     ).then(fn=None, js=MARK_DIRTY_JS)