Improve audio capture and LLM integration

- Implement Silero VAD for dynamic audio chunking
- Add support for Ollama and vLLM backends
- Harden extraction prompts for strict JSON output
- Refactor TUI worker to handle proposals asynchronously

src/pipeline/orchestrator.py

@@ -88,39 +88,13 @@ class PipelineOrchestrator:
         Worker that handles TUI: Proposal -> Persistence.
         """
         logger.info("TUI Worker started.")
-        while self.is_running:
-            try:
-                # Get proposal from queue
-                result = await self.proposal_queue.get()
-
-                logger.info("Proposal received. Launching TUI for confirmation.")
-
-                # Launch TUI (Note: Textual's run() is blocking)
-                # We need to run the TUI in a way that doesn't block the overall event loop
-                # or we accept that the system pauses for confirmation.
-                # Given the requirement for "Non-blocking", but TUI is a focus-modal,
-                # we launch it.
-
-                # To integrate Textual with asyncio, we can use its async support.
-                # However, ConfirmationApp is designed as a standard Textual app.
-                # Since we want to bridge the asyncio loop, we'll run the TUI.
-
-                # Note: In a real high-performance pipeline, we'd use an async TUI
-                # that updates widgets in real-time. For now, we follow the
-                # a confirmation screen pattern.
-
-                # we will use the run() method, but since we are in an async loop,
-                # we might need to wrap it or use an async variant.
-                # For this integration, we'll use the run() method as defined
-                # in ConfirmationApp, which will take over the terminal.
-
-                ConfirmationApp(result).run()
-
-            except Exception as e:
-                logger.error(f"TUI Worker error: {e}")
-
-            # Small sleep
-            await asyncio.sleep(0.1)
+        try:
+            # Launch TUI exactly once.
+            # Pass the proposal queue to the app.
+            app = ConfirmationApp(proposal_queue=self.proposal_queue)
+            await app.run_async()
+        except Exception as e:
+            logger.error(f"TUI Worker error: {e}")
 
     async def run(self):
         """