chore: fix toggleFilter isempty implementation

Author: NarrowsProjects

lib/public/components/Filters/common/filters/ToggleFilterModel.js

@@ -51,18 +51,18 @@ export class ToggleFilterModel extends SelectionModel {
     }
 
     /**
-     * By default, a value of `false` is treated as an empty state, meaning
-     * the filter is effectively not applied when toggled off.
+     * Determines whether the current value should be considered empty.
      *
-     * However, if the model was constructed with `falseIsEmpty = true`,
-     * then `false` is treated as a valid (non-empty) selection, and this
-     * method will always return `false`.
+     * By default (`falseIsEmpty = false`), this model never treats its value
+     * as empty—both `true` and `false` are considered valid selections.
+     *
+     * If `falseIsEmpty = true`, then a value of `false` is treated as empty.
      *
      * @return {boolean} `true` if the current value is considered empty,
      * otherwise `false`.
      */
     get isEmpty() {
-        if (!this._falseIsEmpty) {
+        if (this._falseIsEmpty) {
             return this.current === false;
         }
 

lib/public/views/LhcFills/Overview/LhcFillsOverviewModel.js

@@ -39,7 +39,7 @@ export class LhcFillsOverviewModel extends OverviewPageModel {
             fillNumbers: new RawTextFilterModel(),
             beamDuration: new TextComparisonFilterModel(),
             runDuration: new TextComparisonFilterModel(),
-            hasStableBeams: new ToggleFilterModel(stableBeamsOnly),
+            hasStableBeams: new ToggleFilterModel(stableBeamsOnly, true),
             stableBeamsStart: new TimeRangeFilterModel(),
             stableBeamsEnd: new TimeRangeFilterModel(),
             beamTypes: new BeamTypeFilterModel(),