fix(ypp): refresh 403'd on every real call — drop the auditDetails part (needs a partner scope)

Creator: 'when I attempt to refresh my YPP page, I get an error about not being
able to reach YouTube. Seriously?' Real log: channels.list failed (403) x3.

Root cause #1 (the 403): channels.list?mine=true&part=statistics,auditDetails,
contentDetails returns 403 insufficientPermissions when the token lacks the
youtubepartner-channel-audit scope — which the auditDetails part ALONE requires,
per the docs ('A request that retrieves the auditDetails part ... must provide an
authorization token that contains the youtubepartner-channel-audit scope'). That
scope is MCN partner tooling with a 2-week token-revocation rule; the app must not
hold it. TASK-39's 'current scopes suffice, no re-consent' slice-1 claim was wrong
for this part; mock-fake tests never touched the real API, so it shipped green and
403'd every refresh since 2026-09-22.
https://developers.google.com/youtube/v3/docs/channels/list

Fix: part=statistics,contentDetails only; standing flags removed from
ChannelStatsService -> YppStatSnapshot surface -> YppTrackerViewModel -> drawer,
replaced by an honest deep-link row ('Channel standing isn't exposed to YouTube
apps — check the Earn page'). YppSnapshot standing columns stay (schema-stable,
always false). channels.list failures now log the response BODY — the bare code
could not name insufficientPermissions, which is what made this undiagnosable.

Root cause #2 (found by the new Good Dog, masked by the 403): statistics come back
as JSON STRINGS ('350'); raw GetInt64() throws. Tolerant ReadInt64 (ValueKind-first;
JsonElement.TryGetInt64 THROWS on strings — type-in, not try-type).

Good Dog: ChannelStatsServiceTests.CaptureCurrent_RequestsNoAuditDetails_AndStillParsesTheSnapshot
(URL asserts no auditDetails + snapshot parses); YppPullOutTests fixture updated.
Recipes for both 403/scope and statistics-strings entered in MyMistakes.md.

Also shipped in the same commit (shared PreviewPane.xaml + ai.md): the audio-sync
status dot removal from the #77 feedback round (creator: 'what is the point of the
status light? Lose it') — IntToSyncBrushConverter deleted with it.

verify.sh gate: 0 warnings, 316/316 pass, scope-check clean.

Services/YppTrackerViewModel.cs

@@ -9,10 +9,11 @@ namespace ytLive.Services;
 /// Backing VM for the YPP pull-out (the "YPP" tab below Stream Settings on the
 /// Live screen's right edge). Shows the connected channel's current position
 /// toward the YPP tier thresholds (subscribers + 90-day uploads via the Data
-/// API), a compliance checklist (live standing from auditDetails + self-reported
-/// 2FA/AdSense), and the "what counts" education the creator would otherwise
-/// have to leave the app to find. Snapshots are appended to SQLite on every
-/// refresh so a later analytics slice can compute velocity/ETA from history.
+/// API), a compliance checklist (2FA/AdSense self-reported — channel standing is
+/// NOT exposed to ordinary apps, so the drawer deep-links to the Earn page for it)
+/// and the "what counts" education the creator would otherwise have to leave the
+/// app to find. Snapshots are appended to SQLite on every refresh so a later
+/// analytics slice can compute velocity/ETA from history.
 /// Drawer open/close lives here (mirrors LiveBroadcastFormViewModel).
 /// </summary>
 public sealed class YppTrackerViewModel : ViewModelBase
@@ -33,10 +34,6 @@ public sealed class YppTrackerViewModel : ViewModelBase
     private long _videoCount;
     private long _totalViews;
     private int _uploadsLast90Days;
-    private bool _communityGuidelinesGoodStanding;
-    private bool _copyrightStrikesGoodStanding;
-    private bool _contentIdClaimsGoodStanding;
-    private bool _overallGoodStanding;
     private bool _hasSnapshot;
     private bool _twoFactorEnabled;
     private bool _adsenseLinked;
@@ -109,10 +106,6 @@ public sealed class YppTrackerViewModel : ViewModelBase
     public long VideoCount => _videoCount;
     public long TotalViews => _totalViews;
     public int UploadsLast90Days => _uploadsLast90Days;
-    public bool CommunityGuidelinesGoodStanding => _communityGuidelinesGoodStanding;
-    public bool CopyrightStrikesGoodStanding => _copyrightStrikesGoodStanding;
-    public bool ContentIdClaimsGoodStanding => _contentIdClaimsGoodStanding;
-    public bool OverallGoodStanding => _overallGoodStanding;
 
     /// <summary>True once a snapshot has successfully captured at least once this
     /// session (drives the standing detail text's "sign in to load" state).</summary>
@@ -158,14 +151,8 @@ public sealed class YppTrackerViewModel : ViewModelBase
     {
         get
         {
-            if (!HasSnapshot) return "Sign in to load your channel's standing from YouTube.";
-            var flags = new System.Collections.Generic.List<string>();
-            if (!CommunityGuidelinesGoodStanding) flags.Add("a community-guidelines flag");
-            if (!CopyrightStrikesGoodStanding) flags.Add("a copyright strike");
-            if (!ContentIdClaimsGoodStanding) flags.Add("a content-ID claim");
-            return flags.Count == 0
-                ? "Good standing — no live flags."
-                : $"FLAGGED ({string.Join(", ", flags)}). Check YouTube Studio for details.";
+            if (!HasSnapshot) return "Sign in to load your channel's progress from YouTube.";
+            return "Channel standing isn't exposed to YouTube apps — check the Earn page for your live status.";
         }
     }
 
@@ -263,10 +250,6 @@ public sealed class YppTrackerViewModel : ViewModelBase
         _videoCount = snapshot.VideoCount;
         _totalViews = snapshot.TotalViews;
         _uploadsLast90Days = snapshot.UploadsLast90Days;
-        _communityGuidelinesGoodStanding = snapshot.CommunityGuidelinesGoodStanding;
-        _copyrightStrikesGoodStanding = snapshot.CopyrightStrikesGoodStanding;
-        _contentIdClaimsGoodStanding = snapshot.ContentIdClaimsGoodStanding;
-        _overallGoodStanding = snapshot.OverallGoodStanding;
         _hasSnapshot = true;
 
         OnPropertyChanged(nameof(DisplayName));
@@ -274,10 +257,6 @@ public sealed class YppTrackerViewModel : ViewModelBase
         OnPropertyChanged(nameof(VideoCount));
         OnPropertyChanged(nameof(TotalViews));
         OnPropertyChanged(nameof(UploadsLast90Days));
-        OnPropertyChanged(nameof(CommunityGuidelinesGoodStanding));
-        OnPropertyChanged(nameof(CopyrightStrikesGoodStanding));
-        OnPropertyChanged(nameof(ContentIdClaimsGoodStanding));
-        OnPropertyChanged(nameof(OverallGoodStanding));
         OnPropertyChanged(nameof(HasSnapshot));
         OnPropertyChanged(nameof(Tier1SubsProgress));
         OnPropertyChanged(nameof(Tier2SubsProgress));