Relative run mode (#1512)

* inti relative mode

* send imediat update on mode change

* add relative to test

* don't persist offset mode

* add test relative and update calc function

* pass data from ssocket

* add dev guard

* spelling and comments

* show relative in offset overview

* remove comments

* refactor: move totalDelay to _rundown

* update  clear naming and comments

* remove old testing values

apps/server/src/services/runtime-service/RuntimeService.ts

@@ -4,6 +4,7 @@ import {
   isPlayableEvent,
   LogOrigin,
   MaybeNumber,
+  OffsetMode,
   OntimeEvent,
   Playback,
   TimerLifeCycle,
@@ -68,6 +69,11 @@ class RuntimeService {
     RuntimeService.previousState = {} as RuntimeState;
   }
 
+  @broadcastResult
+  setOffsetMode(mode: OffsetMode) {
+    runtimeState.setOffsetMode(mode);
+  }
+
   /**
    * Checks result of an update and notifies integrations as needed
    * This is the only exception of a private method that has broadcast result
@@ -697,11 +703,14 @@ function broadcastResult(_target: any, _propertyKey: string, descriptor: Propert
     // for the very fist run there will be nothing in the previousState so we force an update
     const justStarted = !RuntimeService.previousState?.timer;
 
+    // offset mode has been changed
+    const offsetModeChanged = RuntimeService.previousState?.runtime?.offsetMode !== state.runtime.offsetMode;
+
     // if playback changes most things should update
     const hasChangedPlayback = RuntimeService.previousState.timer?.playback !== state.timer.playback;
 
     // combine all big changes
-    const hasImmediateChanges = hasNewLoaded || justStarted || hasChangedPlayback;
+    const hasImmediateChanges = hasNewLoaded || justStarted || hasChangedPlayback || offsetModeChanged;
 
     /**
      * Timer should be updated if