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>

orchestrator/kvb_orchestrator/names.py

@@ -65,9 +65,14 @@ class Directory:
 
     def renames(self, begin: float, end: float) -> list[dict]:
         found = []
+        shown = set()
         for session, own in self.by_session.items():
             for before, after in itertools.pairwise(own):
-                if before["name"] != after["name"] and begin <= after["first_seen"] <= end:
+                pair = (session, before["name"], after["name"])
+                if before["name"] == after["name"] or pair in shown:
+                    continue
+                shown.add(pair)
+                if begin <= after["first_seen"] <= end:
                     found.append(event({
                         "id": f"rename:{session}:{after['first_seen']}", "ts": after["first_seen"], "kind": "rename", "agent": after["name"],
                         "now": self.now(session), "session": session, "title": f"{before['name']} heißt jetzt {after['name']}",
@@ -89,9 +94,20 @@ class Names:
         self.observed: dict[str, str] = observed if isinstance(observed, dict) else {}
 
     def observe(self, sightings: list[tuple[str, str, float | None, str]], now: float) -> None:
+        """Args:
+            sightings: (session, name, seen, source); of several sightings of
+                one session from one source only the newest counts, so two
+                claims under different names cannot flip the name back and
+                forth on every state build.
+        """
+        newest: dict[tuple[str, str], tuple[str, str, float | None, str]] = {}
+        for sighting in sightings:
+            key = (sighting[0], sighting[3])
+            if key not in newest or (sighting[2] or -math.inf) >= (newest[key][2] or -math.inf):
+                newest[key] = sighting
         with self.lock:
             changed = False
-            for session, name, seen, source in sightings:
+            for session, name, seen, source in newest.values():
                 key = f"{session}\x00{source}"
                 if not session or not name or self.observed.get(key) == name:
                     continue

orchestrator/kvb_orchestrator/settings.py

@@ -36,6 +36,7 @@ SETTINGS = {
         "direct": {"on": True, "volume": 0.5},
         "radio": {"on": False, "volume": 0.25},
     },
+    "squelch": 1.0,
     "notify": True,
     "streams": [],
     "speech": {"on": False, "classes": ["mayday", "pan-pan", "security"], "muted": []},
@@ -195,6 +196,7 @@ def valid_settings(raw: object) -> dict:
         "colors": {key: color(colors[key], f"colors.{key}") for key in SETTINGS["colors"]},
         "music": {"on": flag(music["on"], "music.on"), "volume": number_in(music["volume"], "music.volume", 0.0, 1.0)},
         "sounds": {kind_name: tone_setting(sounds[kind_name], kind_name) for kind_name in TONES},
+        "squelch": number_in(data["squelch"], "squelch", 0.0, 1.0),
         "notify": flag(data["notify"], "notify"),
         "streams": [stream_entry(entry, index) for index, entry in enumerate(data["streams"])],
         "speech": speech_setting(data["speech"]),

orchestrator/kvb_orchestrator/tree.py

@@ -191,7 +191,10 @@ class Tree:
             try:
                 info = self.file.stat()
             except OSError as error:
-                return {"repos": [], "scanned": None, "error": f"no pkgmgr tree file at {self.file}: {error.strerror}"}
+                return {"repos": [], "scanned": None, "error": (
+                    f"no pkgmgr tree file at {self.file}: {error.strerror}. The tree timer runs `pkgmgr branch tree`, which the installed pkgmgr "
+                    "lacks until a release ships it: release pkgmgr and install it, then the timer writes the file within a minute."
+                )}
             stamp = (info.st_mtime_ns, info.st_size)
             if self.cached is None or stamp != self.stamp:
                 self.cached, self.stamp = read_tree(self.file), stamp