conductor(plan): Mark task 'Switch LLM interaction' as complete

conductor/tracks/owlen_evolution_20251226/plan.md

@@ -7,7 +7,7 @@
 - [x] Task: Refactor `main.rs` into UI and Engine Loops 9648ddd
     - Separate the TUI rendering loop into its own async task or thread.
     - Create the Engine loop (Tokio task) to handle `Message` processing.
-- [ ] Task: Switch LLM interaction to Streaming-only
+- [x] Task: Switch LLM interaction to Streaming-only c54962b
     - Update the LLM client to use streaming responses.
     - Ensure the UI updates incrementally as tokens arrive.
 - [ ] Task: Introduce `Arc<Mutex<AppState>>` for shared state