Game audio bar is now ALWAYS visible (TASK 4 gating removed, 2026-08-15): the show/hide machinery kept hiding the desktop/game meter whenever no full-screen game with sound was up or no TRAX music played, which the creator read as the meter being lost. Deleted IGameAudioDetector/GameAudioDetector/GameAudioHysteresis (Services/), the VM's 250ms DispatcherTimer poll + OnGameAudioActiveChanged/OnGameAudioPollTick + IsGameAudioBarVisible + _gameAudioBarActive/_gameAudioTimer/_gameAudioDetector, and the two detector test files (GameAudioDetectorTests, GameAudioHysteresisTests); MainWindow.xaml drops the Visibility binding so the bar renders unconditionally. Desktop audio is just automatic WASAPI loopback now. Docs in the same commit: ai.md (audio section + Services inventory), Services/index.md, ViewModels/index.md, TASKS.md TASK 9 item 7 follow-up, HANDOFF.md shipped state + stale poll-timer landmine removed. Build 0 warnings, 189 tests passing (8 detector tests removed)

MainWindow.xaml

@@ -754,16 +754,14 @@
                         </Border>
 
                         <!-- Desktop/game audio bar: overlaid at the bottom of the
-                             preview while a full-screen game is producing sound or
-                             TRAX music is playing (the game audio detector). Meter
-                             + mute + volume control live here; desktop audio itself
-                             is automatic WASAPI loopback. Volume + mute are
-                             stream-honest AND scale the TRAX music in the
-                             headphones, so the creator hears the control work. -->
+                             preview, always visible. Meter + mute + volume control
+                             live here; desktop audio itself is automatic WASAPI
+                             loopback. Volume + mute are stream-honest AND scale the
+                             TRAX music in the headphones, so the creator hears the
+                             control work. -->
                         <Border HorizontalAlignment="Center" VerticalAlignment="Bottom"
                                 Background="#D9000000" CornerRadius="6" Padding="12,8"
-                                Margin="0,0,0,12"
-                                Visibility="{Binding IsGameAudioBarVisible, Converter={StaticResource BoolToVis}}">
+                                Margin="0,0,0,12">
                             <StackPanel Orientation="Horizontal">
                                 <!-- TRAX sits left of the "Desktop Audio" label
                                      (the creator's pick): it rides the desktop