fix(orchestrator): S1 fit, rename once, Deutschlandfunk e2e, squelch, tree cause

Requirement 001 phase 6, S1:

- Fit: Agents and Artifacts in a graph view fill the window from 861 px
  up (body.fit flex column); the e2e walk probes #agents/orbit at every
  width for a page no taller than the window.
- Rename once: a session seen under two names by one source (two claims)
  flipped its name on every state build, so the Stream logged a rename
  each poll. Names.observe keeps only the newest sighting per session
  and source, and the timeline emits each (session, before, after) pair
  once.
- Deutschlandfunk: root cause was the signed media-src, which never
  listed the redirect target f111.rndfnk.com that st01.sslstream.dlf.de
  answers with (fixed in ba97f7c). The e2e now replays that chain, a
  302 from one https origin to a second, in Chromium and Firefox, with
  self-signed throwaway certificates the drivers accept.
- Squelch: a settings slider 0..1 scales every tone; at 0 no beep plays,
  music on or off (Voice.beep skips a silent tone). Stored settings
  without the key load with 1.0.
- Tree: the missing tree file error names `pkgmgr branch tree` and the
  release and install step that makes the timer write it.

Evidence: make test 655 OK, ruff and markdownlint clean
(/tmp/s1-make-test-1.log); e2e 17 OK, none skipped (/tmp/s1-e2e-3.log);
MEDUSA 14 files, 0 findings.

🎯 Fix: 94 %
💥 Break: 4 %
💸 Cost: 100 %
⏱️ Time: –
🛡️ Security: 100 %
🏆 Score: 90
🚦 Gate: ✅ 90/5, cost and time <= 100, security 100 %

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

tests/test_hub_voice.py

@@ -38,6 +38,7 @@ console.log(JSON.stringify({
   spoken: filters.map((filter) => rows.map((row) => V.speakable(row, filter))),
   queue: pending.map((item) => item.cls),
   loud: settings.map((one) => Object.fromEntries(["mayday", "review", "direct", "radio"].map((tone) => [tone, V.loudness(tone, one)]))),
+  beeps: settings.map((one) => V.beep({mayday: true, review: true, direct: true, radio: true}, one, ["mayday", "review", "direct", "radio"])),
   frames: [V.frames(1.5, 16000, 120), V.frames(130, 16000, 120), V.frames(0, 16000, 120)],
   wav: Buffer.from(V.wav(Float32Array.from([0, 0.5, -0.5, 1, -1, 2, -2]), 16000)).toString("base64"),
 }));
@@ -52,6 +53,7 @@ class TestVoiceModule(unittest.TestCase):
             settings.SETTINGS,
             {**settings.SETTINGS, "music": {"on": True, "volume": 1.0}, "sounds": quiet},
             {**settings.SETTINGS, "sounds": {**settings.SETTINGS["sounds"], "mayday": {"on": True, "volume": 0.0}, "radio": {"on": True, "volume": 0.8}}},
+            *({**settings.SETTINGS, "squelch": 0.0, "music": {"on": music, "volume": 1.0}, "sounds": {name: {"on": True, "volume": 1.0} for name in settings.TONES}} for music in (True, False)),
         ]
         command = ["node", "-e", VOICE_PROBE, str(VOICE), json.dumps(cls.settings)]
         done = subprocess.run(command, capture_output=True, text=True, timeout=60, check=True)
@@ -63,7 +65,11 @@ class TestVoiceModule(unittest.TestCase):
         for loud in self.data["loud"]:
             with self.subTest(loud=loud):
                 self.assertEqual(loud["mayday"], max(loud.values()))
-        self.assertEqual([loud["mayday"] for loud in self.data["loud"]], [0.9, 1.0, 0.8])
+        self.assertEqual([loud["mayday"] for loud in self.data["loud"]], [0.9, 1.0, 0.8, 0.0, 0.0])
+
+    def test_squelch_at_zero_plays_no_tone_with_music_on_or_off(self):
+        self.assertEqual(self.data["beeps"], ["mayday", None, "mayday", None, None])
+        self.assertEqual([set(loud.values()) for loud in self.data["loud"][3:]], [{0.0}, {0.0}])
 
     def test_the_radio_filter_picks_classes_and_stations(self):
         self.assertEqual(self.data["spoken"], [