Improve UI performance by optimizing reactivity

- Replace `ref`s with `shallowRef` when deep reactivity is not needed.
- Replace `readonly`s with `shallowReadonly` where the goal is to only
  prevent `.value` mutation.
- Remove redundant `ref` in `SizeObserver.vue`.
- Remove redundant nested `ref` in `TooltipWrapper.vue`.
- Remove redundant `events` export from `UseCollectionState.ts`.
- Remove redundant `computed` from `UseCollectionState.ts`.
- Remove `timestamp` from `TreeViewFilterEvent` that becomes unnecessary
  after using `shallowRef`.
- Add missing unit tests for `UseTreeViewFilterEvent`.
- Add missing stub for `FilterChangeDetails`.

tests/unit/presentation/components/Scripts/View/Tree/TreeView/Bindings/TreeViewFilterEvent.spec.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect } from 'vitest';
 import {
-  TreeViewFilterAction, TreeViewFilterEvent, TreeViewFilterPredicate,
+  TreeViewFilterAction, TreeViewFilterPredicate,
   createFilterRemovedEvent, createFilterTriggeredEvent,
 } from '@/presentation/components/Scripts/View/Tree/TreeView/Bindings/TreeInputFilterEvent';
 
@@ -47,19 +47,6 @@ describe('TreeViewFilterEvent', () => {
       // expect
       expect(event.predicate).to.equal(predicate);
     });
-    it('returns unique timestamp', () => {
-      // arrange
-      const instances = new Array<TreeViewFilterEvent>();
-      // act
-      instances.push(
-        createFilterTriggeredEvent(createPredicateStub()),
-        createFilterTriggeredEvent(createPredicateStub()),
-        createFilterTriggeredEvent(createPredicateStub()),
-      );
-      // assert
-      const uniqueDates = new Set(instances.map((instance) => instance.timestamp));
-      expect(uniqueDates).to.have.length(instances.length);
-    });
   });
 
   describe('createFilterRemovedEvent', () => {
@@ -79,19 +66,6 @@ describe('TreeViewFilterEvent', () => {
       // assert
       expect(event.predicate).to.equal(expected);
     });
-    it('returns unique timestamp', () => {
-      // arrange
-      const instances = new Array<TreeViewFilterEvent>();
-      // act
-      instances.push(
-        createFilterRemovedEvent(),
-        createFilterRemovedEvent(),
-        createFilterRemovedEvent(),
-      );
-      // assert
-      const uniqueDates = new Set(instances.map((instance) => instance.timestamp));
-      expect(uniqueDates).to.have.length(instances.length);
-    });
   });
 });