feat(gui): implement Phases 2-5 of Comprehensive GUI UX track

- Add cost tracking with new cost_tracker.py module
- Enhance Track Proposal modal with editable titles and goals
- Add Conductor Setup summary and New Track creation form to MMA Dashboard
- Implement Task DAG editing (add/delete tickets) and track-scoped discussion
- Add visual polish: color-coded statuses, tinted progress bars, and node indicators
- Support live worker streaming from AI providers to GUI panels
- Fix numerous integration test regressions and stabilize headless service

tests/test_mma_dashboard_streams.py

@@ -9,10 +9,10 @@ def _make_app(**kwargs):
  app = MagicMock(spec=App)
  app.mma_streams = kwargs.get("mma_streams", {})
  app.mma_tier_usage = kwargs.get("mma_tier_usage", {
-  "Tier 1": {"input": 0, "output": 0},
-  "Tier 2": {"input": 0, "output": 0},
-  "Tier 3": {"input": 0, "output": 0},
-  "Tier 4": {"input": 0, "output": 0},
+  "Tier 1": {"input": 0, "output": 0, "model": "gemini-3.1-pro-preview"},
+  "Tier 2": {"input": 0, "output": 0, "model": "gemini-3-flash-preview"},
+  "Tier 3": {"input": 0, "output": 0, "model": "gemini-2.5-flash-lite"},
+  "Tier 4": {"input": 0, "output": 0, "model": "gemini-2.5-flash-lite"},
  })
  app.tracks = kwargs.get("tracks", [])
  app.active_track = kwargs.get("active_track", None)
@@ -23,6 +23,16 @@ def _make_app(**kwargs):
  app._pending_mma_spawn = kwargs.get("_pending_mma_spawn", None)
  app._pending_mma_approval = kwargs.get("_pending_mma_approval", None)
  app._pending_ask_dialog = kwargs.get("_pending_ask_dialog", False)
+ app.ui_new_track_name = ""
+ app.ui_new_track_desc = ""
+ app.ui_new_track_type = "feature"
+ app.ui_conductor_setup_summary = ""
+ app.ui_epic_input = ""
+ app._show_add_ticket_form = False
+ app.ui_new_ticket_id = ""
+ app.ui_new_ticket_desc = ""
+ app.ui_new_ticket_target = ""
+ app.ui_new_ticket_deps = ""
  app._tier_stream_last_len = {}
  return app
 
@@ -32,6 +42,9 @@ def _make_imgui_mock():
  m.begin_table.return_value = False
  m.begin_child.return_value = False
  m.checkbox.return_value = (False, False)
+ m.input_text.side_effect = lambda label, value, *args, **kwargs: (False, value)
+ m.input_text_multiline.side_effect = lambda label, value, *args, **kwargs: (False, value)
+ m.combo.side_effect = lambda label, current_item, items, *args, **kwargs: (False, current_item)
  m.collapsing_header.return_value = False
  m.ImVec2.return_value = MagicMock()
  return m