conductor(plan): mark Phase 3 complete for mma_multiworker_viz

conductor/tracks/mma_multiworker_viz_20260306/plan.md

@@ -17,19 +17,7 @@ Focus: Track worker status separately
 ## Phase 3: Multi-Pane Display
 Focus: Display all active streams
 
-- [ ] Task 3.1: Iterate all Tier 3 streams
-    - WHERE: `src/gui_2.py` `_render_tier_stream_panel()`
-    - WHAT: Show all workers in split view
-    - HOW:
-      ```python
-      tier3_keys = [k for k in self.mma_streams if "Tier 3" in k]
-      for key in tier3_keys:
-       status = self._worker_status.get(key, "unknown")
-       imgui.text(f"{key}: {status}")
-       if imgui.begin_child(f"stream_{key}", height=150):
-        imgui.text_wrapped(self.mma_streams.get(key, ""))
-       imgui.end_child()
-      ```
+- [x] Task 3.1: Iterate all Tier 3 streams - Shows all workers with status indicators (color-coded)
 
 ## Phase 4: Stream Pruning
 Focus: Limit memory per stream