feat: camera quality settings, audio processing toggles, config-seeded defaults

- Add camera video quality controls (resolution/framerate/bitrate/codec)
  to Settings > Video, mirroring the screen share settings UI
- Add audio processing toggles (echo cancellation, noise suppression,
  auto gain control) to Settings > Audio, replacing URL-param-only controls
- Display raw values inline on all sliders (framerate, bitrate, volume)
- Add config-seeded defaults: config.json media_quality values now seed
  Setting defaults for users who haven't explicitly set preferences
- Camera settings are applied when joining a call via ConnectionFactory

Signed-off-by: Ryan Emmick <ryanemmick4@gmail.com>

src/widget.ts

@@ -21,6 +21,7 @@ import type { IWidgetApiRequest } from "matrix-widget-api";
 import { LazyEventEmitter } from "./LazyEventEmitter";
 import { getUrlParams } from "./UrlParams";
 import { Config } from "./config/Config";
+import { seedSettingsFromConfig } from "./settings/settings";
 import { ElementCallReactionEventType } from "./reactions";
 
 // Subset of the actions in element-web
@@ -195,6 +196,7 @@ export const initializeWidget = (
         // Wait for the config file to be ready (we load very early on so it might not
         // be otherwise)
         await Config.init();
+        seedSettingsFromConfig(Config.get().media_quality);
         await client.startClient({ clientWellKnownPollPeriod: 60 * 10 });
         return client;
       };