feat(orchestrator): S5.1 radio spot, compact menus, trend, ETA and Tasks 3D

Requirement 001 decisions 52 to 58 (operator 2026-11-09):

- Radio spot: the Agents toolbar radio button expands inline with the one
  composer (every channel, post and call recipients, Record, Send), a gear
  with the radio settings (tones, squelch, read aloud, moved out of the
  general settings) and Cancel mayday, which leaves the toolbar; the Radio
  tab keeps speakers, stations and the log plus a jump to the spot.
- Day/Night menu: the badge and Drain, Suspend and Resume only; each
  explanation is the button's tooltip.
- Tasks toolbar: views, filter, estimation, sort and business value in one
  wrapping row with a Request choices dropdown; the status chips stay the
  second row.
- Burndown and burnup: a trend selector (off, linear regression, velocity
  over N days) stored in the hub settings, the trend lines and the forecast
  date on the chart, and a tooltip per point with the work packages that
  started, ended or joined there.
- ETA: every list row shows its ETA (end when done, else start or now plus
  the forecast length behind its predecessors), sharing one predecessor
  walk with the Gantt.
- Tasks 3D: a sixth view on the 3D engine with the dependency edges in the
  Gantt colours, layouts Force and Time.
- Steady 3D camera: the view fits once per graph build, refreshes keep the
  operator's camera.
- e2e: Firefox runs with its profile as cwd, so its crashreporter no longer
  drops core dumps into the repository.
- A forecast beyond the last second a Date can hold is no forecast, so a
  nearly flat regression no longer aborts the Tasks render.

Evidence: make test Ran 717 OK, ruff clean, markdownlint 0 errors; e2e 30 of
30 OK in Chromium and Firefox at 1920, 1366 and 390 px; MEDUSA 0 findings
after one skeptic-accepted lexical EXA006.

🎯 Fix: 93 %
💥 Break: 4 %
💸 Cost: 100 %
⏱️ Time: –
🛡️ Security: 100 %
🏆 Score: 89
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_hub_nav.py

@@ -11,7 +11,7 @@ const N = require(process.argv[1]);
 const hashes = ["", "#stream", "#stream/inbox", "#stream/rules", "#stream/nope", "#agents/chord", "#agents/3d", "#agents", "#agents/nope",
   "#artifacts/tree", "#artifacts/orbit", "#graph", "#graph/swimlane", "#graph/orbit", "#tree", "#bogus", "#agents%2Fswimlane",
   "#agents/hierarchy", "#artifacts/hierarchy", "#graph/hierarchy", "#tree/hierarchy", "#stream/radio", "#radio",
-  "#tasks", "#tasks/board", "#tasks/rasci", "#tasks/orbit", "#agents/board", "#tasks/hierarchy", "#tasks/gantt", "#tasks/burn", "#agents/gantt"];
+  "#tasks", "#tasks/board", "#tasks/rasci", "#tasks/orbit", "#agents/board", "#tasks/hierarchy", "#tasks/gantt", "#tasks/burn", "#agents/gantt", "#tasks/3d"];
 console.log(JSON.stringify({
   tabs: N.TABS.map(([id, label]) => [id, label, (N.SUBS[id] || []).map(([sub, name]) => [sub, name])]),
   views: N.VIEWS.map(([id, label]) => [id, label]),
@@ -37,10 +37,10 @@ class TestNavModule(unittest.TestCase):
         stream = ["stream", "Stream", [["inbox", "Inbox"], ["rules", "Firewall"], ["radio", "Radio"]]]
         self.assertEqual(self.data["tabs"], [stream, ["agents", "Agents", []], ["artifacts", "Artifacts", []], ["tasks", "Tasks", []]])
 
-    def test_agents_and_artifacts_offer_five_views_in_order_and_tasks_five(self):
+    def test_agents_and_artifacts_offer_five_views_in_order_and_tasks_six(self):
         shared = [["orbit", "Orbit"], ["chord", "Chord"], ["swimlane", "Swimlane"], ["tree", "Tree"], ["3d", "3D"]]
         self.assertEqual((self.data["views"], self.data["artifacts"]), (shared, shared))
-        task_views = [["list", "List"], ["board", "Board"], ["rasci", "RASCI"], ["gantt", "Gantt"], ["burn", "Burndown and burnup"]]
+        task_views = [["list", "List"], ["board", "Board"], ["rasci", "RASCI"], ["gantt", "Gantt"], ["burn", "Burndown and burnup"], ["3d", "3D"]]
         self.assertEqual((self.data["taskViews"], self.data["tasks"]), (task_views,) * 2)
 
     def test_only_agents_add_the_hierarchy_after_3d(self):
@@ -82,6 +82,7 @@ class TestNavModule(unittest.TestCase):
             {"screen": "tasks", "view": "gantt", "redirect": None},
             {"screen": "tasks", "view": "burn", "redirect": None},
             {"screen": "agents", "view": None, "redirect": None},
+            {"screen": "tasks", "view": "3d", "redirect": None},
         ])
 
     def test_every_screen_has_its_own_hash_and_tab(self):