conductor(plan): mark Phase 4 & 5 complete for mma_multiworker_viz

conductor/tracks/mma_multiworker_viz_20260306/plan.md

@@ -22,17 +22,8 @@ Focus: Display all active streams
 ## Phase 4: Stream Pruning
 Focus: Limit memory per stream
 
-- [ ] Task 4.1: Prune stream on append
-    - WHERE: `src/app_controller.py` stream append logic
-    - WHAT: Limit to 10KB per stream
-    - HOW:
-      ```python
-      MAX_STREAM_SIZE = 10 * 1024
-      self.mma_streams[stream_id] += text
-      if len(self.mma_streams[stream_id]) > MAX_STREAM_SIZE:
-       self.mma_streams[stream_id] = self.mma_streams[stream_id][-MAX_STREAM_SIZE:]
-      ```
+- [x] Task 4.1: Prune stream on append - MAX_STREAM_SIZE = 10KB, prunes oldest when exceeded
 
 ## Phase 5: Testing
-- [ ] Task 5.1: Write unit tests
+- [x] Task 5.1: Write unit tests - Tests pass (hooks, api_hook_client, mma_dashboard_streams)
 - [ ] Task 5.2: Conductor - Phase Verification