feat: Add 'call' support to improve 2-way audio experience (#2486)

Draws significant inspiration (and direct styling) from
https://github.com/dermotduffy/advanced-camera-card/pull/2447 . Thank
you @Maudfer !

BREAKING CHANGE:

The microphone condition previously bundled two unrelated signals —
whether a two-way-audio session was connected and whether the microphone
was muted. Connection state is now its own dedicated call condition, and
microphone is reserved purely for mute state. Configs are upgraded
automatically (the card rewrites affected conditions under overrides,
elements, and automations). If you maintain config by hand, convert as
follows:

If you only used connected:

# Before
```yaml
condition: microphone
connected: true
```

# After
```yaml
condition: call
call: true
```
If you used both connected and muted — they must be split into two
conditions, since they no longer live together:

# Before
```yaml
condition: microphone
connected: true
muted: false
```

# After
```yaml
condition: and
conditions:
  - condition: call
    call: true
  - condition: microphone
    muted: false
```

src/localize/languages/en.json

@@ -207,6 +207,10 @@
       }
     },
     "common": {
+      "auto_hide_conditions": {
+        "call": "During a two-way audio call",
+        "casting": "While casting"
+      },
       "controls": {
         "builtin": "Built-in video controls",
         "filter": {
@@ -219,6 +223,7 @@
           }
         },
         "next_previous": {
+          "auto_hide": "Automatically hide next & previous controls",
           "editor_label": "Next & Previous",
           "size": "Next & previous control size in pixels",
           "style": "Next & previous control style",
@@ -310,6 +315,8 @@
         "inactive": "Only when not interacting"
       },
       "media_action_conditions": {
+        "call_mute": "On call end",
+        "call_unmute": "On call start",
         "hidden": "On browser/tab hiding",
         "microphone_mute": "On microphone mute",
         "microphone_unmute": "On microphone unmute",
@@ -387,6 +394,17 @@
       "auto_play": "Automatically play live cameras",
       "auto_unmute": "Automatically unmute live cameras",
       "controls": {
+        "call": {
+          "button_size": "Call control button size",
+          "editor_label": "Two-way audio call",
+          "end": "End 2-way audio call",
+          "lock": "Lock UI during an active call",
+          "mute_audio": "Mute audio",
+          "mute_microphone": "Mute microphone",
+          "start": "Start 2-way audio call",
+          "unmute_audio": "Unmute audio",
+          "unmute_microphone": "Unmute microphone"
+        },
         "editor_label": "Live Controls",
         "ptz": {
           "editor_label": "PTZ",
@@ -427,7 +445,6 @@
         "auto_unmute": "Automatically unmute the microphone",
         "disconnect_seconds": "Seconds before disconnecting microphone (0=never)",
         "editor_label": "Microphone",
-        "lock": "Lock the UI while the microphone is unmuted",
         "mute_after_microphone_mute_seconds": "Seconds after microphone mute before muting inbound audio"
       },
       "preload": "Preload live view in the background",
@@ -461,6 +478,7 @@
         "right": "Aligned to the right",
         "top": "Aligned to the top"
       },
+      "auto_hide": "Conditions under which the menu auto-hides",
       "button_size": "Menu button size in pixels",
       "buttons": {
         "alignment": "Button alignment",
@@ -468,6 +486,7 @@
           "matching": "Matching the menu alignment",
           "opposing": "Opposing the menu alignment"
         },
+        "call": "Call / Two-way audio",
         "camera_ui": "Camera user interface",
         "cameras": "Cameras",
         "clips": "Clips",
@@ -555,6 +574,7 @@
       }
     },
     "status_bar": {
+      "auto_hide": "Conditions under which the status bar auto-hides",
       "height": "Status bar height in pixels",
       "items": {
         "enabled": "Item enabled",
@@ -726,6 +746,11 @@
   "error": {
     "awaiting_live": "Waiting for live stream to load...",
     "awaiting_media": "Waiting for media to load",
+    "call_unavailable_heading": "Two-way audio unavailable",
+    "call_invalid_target": "The requested camera or stream is not available to call.",
+    "call_microphone_forbidden": "Microphone access has been denied for this page. Update your browser permissions and try again.",
+    "call_microphone_unsupported": "Microphone access is not available in this browser (e.g. requires HTTPS).",
+    "call_no_two_way_audio": "This camera does not support two-way audio.",
     "camera_initialization": "Camera initialization failed",
     "camera_initialization_reolink": "Could not initialize Reolink camera",
     "configuration": "Check configuration",