Allow disabling legacy calls and make Voice & Video settings Legacy Voice & Video (#33692)

* Change `feature_group_calls` to default to true.
Change state to Beta

* Add `enableLegacyCallsVoip` (clarify: Audio settings relate to Legacy)
Change `element_call.use_exclusively` to just be the default of
`enableLegacyCallsVoip`.
Allow disabling in Legacy in the settings. (overwrite `use_exclusivly`
via `enableLegacyCallsVoip`)
Rename `Voice & Video` to `Legacy Voice & Video`

* improvements
 - settings title update to only show legacy when appropriate
 - hide menu all together if use_exclusivly is chosen

* simplify by removing the feature_group_calls flag

* smaller cleanup

* fix tests and cleanup

* clarify settings (disable) in config.md

* add back EC relevant settings in room settings dialog

* update screenshots (now default to EC enabled (not disabled)
-> show voice and video tab in room settings

* update screenshots

* always show option to control voice messages input

* lint

* fix test

* disable -> enabled And only have on mic dropdown

* update config.md

* Back to `disabled` (on by default/no config)

* remove element call hint from voice-video settings

* Update apps/web/src/i18n/strings/en_EN.json

Co-authored-by: Robin <robin@robin.town>

* Update apps/web/src/components/views/settings/tabs/user/VoiceUserSettingsTab.tsx

Co-authored-by: Robin <robin@robin.town>

* review

* cleanup element call url setting (its deprecated/not used anymore)

* clarify, that also jisti will be enabled/disabled by legacy settings
flag

* remove double section

* remove unn exassary element_call configurations

* Update en_EN.json

* Update VoiceUserSettingsTab.tsx

* Make tests use new defaults (enable element call)

* Default events power levels

* format

* review "Enable Legacy voice/video calls" label

* more radical usage of defaults in element_call config.json's

* Update config.json

* Update en_EN.json

* Update RoomSettingsDialog-test.tsx.snap

* Update useRoomCall.tsx

* fix imports

* Update request permission promp to latest designs:
https://www.figma.com/design/aOEkaJtaBmPy058V7uoqVr/Element-Call-Updates---2026?node-id=45-12591&t=7takL39icZwt9YjL-0

* Update config.json.d.ts

* fix usage of `Element` in i18n

* Update General-room-settings-tab-should-be-rendered-properly-1-linux.png

---------

Co-authored-by: Robin <robin@robin.town>

apps/web/test/test-utils/call.ts

@@ -135,7 +135,7 @@ export function useMockedCalls() {
  * Enables the feature flags required for call tests.
  */
 export function enableCalls(): { enabledSettings: Set<string> } {
-    const enabledSettings = new Set(["feature_group_calls", "feature_video_rooms", "feature_element_call_video_rooms"]);
+    const enabledSettings = new Set(["feature_video_rooms", "feature_element_call_video_rooms"]);
     jest.spyOn(SettingsStore, "getValue").mockImplementation((settingName): any => {
         if (settingName.startsWith("feature_")) return enabledSettings.has(settingName);
         if (settingName === "activeCallRoomIds") return [];