fix: correct settings and reactions button selectors for EC 0.19.3

EC 0.19.3 changed the toolbar layout. The old previousElementSibling
traversal from the leave button pointed at wrong elements:
- settingsButton was finding the raise-hand button
- reactionsButton was finding the screenshare button

Fix: use stable selectors instead:
- settingsButton: data-testid=settings-bottom-center (new in EC 0.19.3)
- reactionsButton: [class*=raiseHand] (CSS module class, consistent in 0.19.x)

src/app/plugins/call/CallControl.ts

@@ -29,17 +29,13 @@ export class CallControl extends EventEmitter implements CallControlState {
   }
 
   private get settingsButton(): HTMLElement | undefined {
-    const leaveBtn = this.document?.querySelector('[data-testid="incall_leave"]');
-
-    const settingsButton = leaveBtn?.previousElementSibling as HTMLElement | null;
-
-    return settingsButton ?? undefined;
+    // EC 0.19.3: settings button has data-testid="settings-bottom-center"
+    return (this.document?.querySelector('[data-testid="settings-bottom-center"]') as HTMLElement) ?? undefined;
   }
 
   private get reactionsButton(): HTMLElement | undefined {
-    const reactionsButton = this.settingsButton?.previousElementSibling as HTMLElement | null;
-
-    return reactionsButton ?? undefined;
+    // EC 0.19.3: reactions/raise-hand button has a CSS module class containing "raiseHand"
+    return (this.document?.querySelector('[class*="raiseHand"]') as HTMLElement) ?? undefined;
   }
 
   private get spotlightButton(): HTMLInputElement | undefined {
@@ -165,6 +161,8 @@ export class CallControl extends EventEmitter implements CallControlState {
   }
 
   public onControlMutation() {
+    const prevScreenshare = this.screenshare;
+
     const screenshare: boolean = this.screenshareButton?.getAttribute('data-kind') === 'primary';
     const spotlight: boolean = this.spotlightButton?.checked ?? false;
 
@@ -176,6 +174,11 @@ export class CallControl extends EventEmitter implements CallControlState {
       spotlight
     );
     this.emitStateUpdate();
+
+    // EC auto-switches to spotlight when screenshare starts — revert to grid
+    if (!prevScreenshare && screenshare) {
+      setTimeout(() => { if (this.spotlight) this.gridButton?.click(); }, 600);
+    }
   }
 
   public setMicrophone(enabled: boolean) {