fix: Release the microphone to the browser when a call ends (#2685)

The microphone is connected when a call needs it and released the moment
that
call ends, so the browser stops reporting it as in use at hangup rather
than
`disconnect_seconds` later.

Existing configurations are migrated automatically by the visual editor.

 - Closes: #2681 

BREAKING CHANGE: `live.microphone.disconnect_seconds` is removed. The
microphone is released when a call ends, so there is no idle countdown
to
configure. Use `live.microphone.always_connected` to hold it open
instead.

BREAKING CHANGE: The `microphone_connect` and `microphone_disconnect`
actions
are removed. The card owns the microphone lifecycle; `microphone_mute`
and
`microphone_unmute` remain.

BREAKING CHANGE: `call` is removed from `live.microphone.auto_mute`,
whose
default is now `[]`. The microphone is muted when a call ends regardless
of
this option.

BREAKING CHANGE: `microphone_unmute` has no effect outside a call.
Nothing
carries the audio at any other time, so the request is ignored rather
than
opening the microphone.

tests/config/types.test.ts

@@ -147,9 +147,8 @@ describe('config defaults', () => {
         lazy_unload: [],
         microphone: {
           always_connected: false,
-          auto_mute: ['call'],
+          auto_mute: [],
           auto_unmute: [],
-          disconnect_seconds: 90,
           mute_after_microphone_mute_seconds: 60,
         },
         preload: false,
@@ -1111,14 +1110,6 @@ describe('config defaults', () => {
         action: 'custom:advanced-camera-card-action',
         advanced_camera_card_action: 'menu_toggle',
       },
-      {
-        action: 'custom:advanced-camera-card-action',
-        advanced_camera_card_action: 'microphone_connect',
-      },
-      {
-        action: 'custom:advanced-camera-card-action',
-        advanced_camera_card_action: 'microphone_disconnect',
-      },
       {
         action: 'custom:advanced-camera-card-action',
         advanced_camera_card_action: 'microphone_mute',