feat(stream): RECONNECTING driven by the status poll — no invented countdown (TASK 32·2)

Creator challenge (2026-11-05): "I really don't think that's going to be a constant — it's going to
depend on so many variables, some that are dark to us." Correct, so the measured-grace constant and
the countdown are dropped from the spec. YouTube's cutoff is server-side and depends on ingest health,
prior stream quality, region and load; a pinned number would be a guess wearing a timer, and it would
be wrong exactly when the creator is staring at it.

What ships instead:

- **Amber RECONNECTING** in the top bar with measured facts only: elapsed seconds and the attempt
  number ("0:12 · attempt 2 of 4"). The seconds come from a stopwatch started at the drop.
- **The status poll speeds up while recovering** (30 s → 4 s) and drives the sign; it restores 30 s
  when recovery ends.
- **`chatEndedEvent`** — already in the chat feed we poll and previously skipped — now raises a signal
  that prompts an immediate status check. It never decides anything: `liveBroadcasts.list`
  `lifeCycleStatus` stays authoritative, with `liveStreams.list` health as the push-received signal.
- At `complete`: red OFF AIR (the existing stop path) rather than a pretend-live sign.

Tests: `ChatEndedSignalTests` (the marker is not a chat row, the service raises the signal, and a
complete broadcast ends recovery with the honest message). FAST gate: 543 passed, 0 warnings.

ViewModels/MainViewModel.Streaming.cs

@@ -271,16 +271,26 @@ public partial class MainViewModel : ViewModelBase
 
     /// <summary>The reality word: TEST while a test broadcast runs, LIVE while on the
     /// air, REC during a local-record session.</summary>
-    public string RunningText => IsTestStream ? "TEST" : IsLive ? "LIVE" : "REC";
+    public string RunningText => IsReconnecting
+        ? "RECONNECTING"
+        : IsTestStream ? "TEST" : IsLive ? "LIVE" : "REC";
+
+    /// <summary>Measured facts only while reconnecting: how long, and which attempt. No countdown —
+    /// YouTube's cutoff is not a constant we can promise (spec revised 2026-11-05).</summary>
+    public string ReconnectDetailText => IsReconnecting
+        ? $"0:{ReconnectElapsedSeconds:00} · attempt {Math.Max(1, ReconnectAttempt)} of {StreamRetryPolicy.Default.Attempts}"
+        : string.Empty;
 
     /// <summary>Reality dot color, one meaning per mode: gold = test, red = live,
     /// green = recording. The pre-spec pulsing lamp never shipped; the word + bar
     /// color carry the state and the dot just pins it.</summary>
-    public string RunningDotBrush => IsTestStream
-        ? ThemeBrush.Hex("Brush.TestContainer")
-        : IsLive
-            ? ThemeBrush.Hex("Brush.Primary")
-            : ThemeBrush.Hex("Brush.Positive");
+    public string RunningDotBrush => IsReconnecting
+        ? ThemeBrush.Hex("Brush.Attention")
+        : IsTestStream
+            ? ThemeBrush.Hex("Brush.TestContainer")
+            : IsLive
+                ? ThemeBrush.Hex("Brush.Primary")
+                : ThemeBrush.Hex("Brush.Positive");
 
     /// <summary>Raises every flag the top bar renders, so any state change re-renders
     /// exactly the world that is now true.</summary>