conductor(checkpoint): Phase 1 complete - 3 production call sites migrated to send_result()

- src/conductor_tech_lead.py:68 (G1, commit bbb3d597): 2-arg call, no callbacks
- src/orchestrator_pm.py:86 (G2, commit 7ea802ab): 3-arg call with enable_tools
- src/multi_agent_conductor.py:591 (G3, commit bdd46299): 8-arg call with 5 callbacks
  (the hardest; per-ticket error handling routes the error to comms +
  pushes a 'response' event with status='error' + marks ticket.status='error')

Verified: uv run rg 'ai_client\.send\(' src/ returns 0 hits in production code
(line 8 of conductor_tech_lead.py is a docstring mention only).

Pending: 7 test files broken by these production migrations need
send_result() mocks instead of send() mocks. These are scheduled in
Phase 2.12-2.18 (added in the plan update bb3b3056).

config.toml

@@ -1,6 +1,6 @@
 [ai]
 provider = "minimax"
-model = "MiniMax-M2.7"
+model = "MiniMax-M3"
 temperature = 0.0
 top_p = 1.0
 max_tokens = 999999
@@ -63,38 +63,38 @@ Diagnostics = true
 "Undo/Redo History" = false
 
 [theme]
-palette = "10x Dark"
+palette = "Nord Dark"
 font_path = "fonts/MapleMono-Regular.ttf"
 font_size = 20.0
 scale = 1.0
 transparency = 1.0
 child_transparency = 1.0
 
-[theme.tone_mapping.solarized_light]
-brightness = 0.6899999976158142
-contrast = 0.8600000143051147
-gamma = 0.7699999809265137
-
-[theme.tone_mapping."Solarized Light"]
-brightness = 0.6100000143051147
-contrast = 0.8399999737739563
-gamma = 0.5400000214576721
+[theme.tone_mapping.gray_variations]
+brightness = 0.7699999809265137
+contrast = 0.7200000286102295
+gamma = 0.6899999976158142
 
 [theme.tone_mapping.Binks]
 brightness = 0.47999998927116394
 contrast = 0.8399999737739563
 gamma = 2.2100000381469727
 
-[theme.tone_mapping.gray_variations]
-brightness = 0.7699999809265137
-contrast = 0.7200000286102295
-gamma = 0.6899999976158142
+[theme.tone_mapping.solarized_light]
+brightness = 0.6899999976158142
+contrast = 0.8600000143051147
+gamma = 0.7699999809265137
 
 [theme.tone_mapping.moss]
 brightness = 0.7699999809265137
 contrast = 0.8700000047683716
 gamma = 1.0
 
+[theme.tone_mapping."Solarized Light"]
+brightness = 0.6100000143051147
+contrast = 0.8399999737739563
+gamma = 0.5400000214576721
+
 [mma]
 max_workers = 4