[lippdev]

Hardening, not a reproduced bug. I checked that switching works (see below); this covers the case where it doesn't.

Problem

With SoundVolumeView (1.5) a failed /SetDefault was ignored: the session went on without the audio switch. The Core Audio backend (1.6 alpha, #91) throws instead (Marshal.ThrowExceptionForHR), and ConsoleEngine.Start doesn't catch it. An error in Audio.SetOutput therefore made MainViewModel roll the whole start back with Engine.Stop(), after the desk screens had already been switched. The two polling paths (UpdateAutoSwitch, UpdatePendingTarget) called SetOutput unguarded too (the loop catches and logs, but then never completes the audio watch and retries forever).

Fix

ConsoleEngine.TrySetOutput logs Áudio: não foi possível trocar para … and lets the session continue. The switch is only recorded (AudioDeviceId, LastAudioSwitchName) when it worked, and the audio watch is completed either way (same as 1.5). The session menu's manual output choice is untouched: it is a user action and still shows its error.

What I checked on a real machine

Driving the shipped ConsoleMode.dll by reflection against SoundVolumeView as reference:

• The output list (with /ShowDisabledDevices 1 /ShowUnpluggedDevices 1, as 1.5 called it) is identical: same 4 outputs, same names, same FriendlyIds, same default, volume 67 vs 66.9 %.
• Volume and mute writes on a non-default output are confirmed by SVV and restored.
• IPolicyConfig.SetDefaultEndpoint and SetEndpointVisibility return S_OK (on the endpoints that were already default / visible, so nothing changed).

So the happy path works; this PR is about not turning a rare COM error into an aborted session.

Tests

ConsoleEngine needs Win32, so there is no unit test; added a manual item to docs/TESTING.md. Build OK, 144 tests pass. No changelog entry: nothing user-visible changes when audio works.

🤖 Generated with Claude Code

[pullfrog]

Important

The fixed-output failure path leaves session audio state inconsistent with the actual output, so the session menu can report and control the wrong device.

Reviewed changes The review covers the best-effort output-switch handling and its manual test checklist.

• Best-effort switching ConsoleEngine logs failed startup and polling switches, continues the session, and completes audio watching.
• Manual verification docs/TESTING.md adds a checklist item for a failed switch during a session start.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using GPT Luna ｜ 𝕏}

[pullfrog]

If this switch fails, State.AudioDeviceId still contains the configured target set earlier in Start, but the OS default remains on the previous output. The session menu treats this field as the current output for its label, selection, and volume/mute actions, so it can show and control the wrong device.

Technical details

# Keep session audio state accurate after a failed startup switch

## Affected sites
- `src/ConsoleMode/Services/ConsoleEngine.cs:45` — initializes `State.AudioDeviceId` to the configured target before the switch attempt.
- `src/ConsoleMode/Services/ConsoleEngine.cs:141` — now ignores the failed `TrySetOutput` result and continues with that target in state.
- `src/ConsoleMode/ViewModels/MainViewModel.SessionMenu.cs:131-145` — treats `State.AudioDeviceId` as the current output for the menu label, volume, and mute.
- `src/ConsoleMode/ViewModels/MainViewModel.SessionMenu.cs:202-204` — marks that target as selected in the output picker.

## Required outcome
- After a failed startup switch, the session menu's displayed/selected output and volume/mute operations must correspond to the actual current output, rather than the requested target that failed.