feat: Support bigger font size in dashboard (#10974)

# Pull Request Template

## Description

Fixes
https://linear.app/chatwoot/issue/CW-4091/accessibility-improvement-support-bigger-font-size-for-the-dashboard

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?

### **Loom video**

https://www.loom.com/share/1ab781859fa748a5ad54aacbacd127b4?sid=a7dd9164-a6de-462f-bff7-1b25e9c55b4f

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

app/javascript/dashboard/components/ui/Tabs/Tabs.vue

@@ -1,6 +1,6 @@
 <script setup>
-import { ref, provide, onMounted, computed } from 'vue';
-import { useEventListener } from '@vueuse/core';
+import { ref, useTemplateRef, provide, computed, watch } from 'vue';
+import { useElementSize } from '@vueuse/core';
 
 const props = defineProps({
   index: {
@@ -19,6 +19,12 @@ const props = defineProps({
 
 const emit = defineEmits(['change']);
 
+const tabsContainer = useTemplateRef('tabsContainer');
+const tabsList = useTemplateRef('tabsList');
+
+const { width: containerWidth } = useElementSize(tabsContainer);
+const { width: listWidth } = useElementSize(tabsList);
+
 const hasScroll = ref(false);
 
 const activeIndex = computed({
@@ -34,20 +40,16 @@ provide('updateActiveIndex', index => {
 });
 
 const computeScrollWidth = () => {
-  // TODO: use useElementSize from vueuse
-  const tabElement = document.querySelector('.tabs');
-  if (tabElement) {
-    hasScroll.value = tabElement.scrollWidth > tabElement.clientWidth;
+  if (tabsContainer.value && tabsList.value) {
+    hasScroll.value = tabsList.value.scrollWidth > tabsList.value.clientWidth;
   }
 };
 
 const onScrollClick = direction => {
-  // TODO: use useElementSize from vueuse
-  const tabElement = document.querySelector('.tabs');
-  if (tabElement) {
-    let scrollPosition = tabElement.scrollLeft;
+  if (tabsContainer.value && tabsList.value) {
+    let scrollPosition = tabsList.value.scrollLeft;
     scrollPosition += direction === 'left' ? -100 : 100;
-    tabElement.scrollTo({
+    tabsList.value.scrollTo({
       top: 0,
       left: scrollPosition,
       behavior: 'smooth',
@@ -55,14 +57,19 @@ const onScrollClick = direction => {
   }
 };
 
-useEventListener(window, 'resize', computeScrollWidth);
-onMounted(() => {
-  computeScrollWidth();
-});
+// Watch for changes in element sizes with immediate execution
+watch(
+  [containerWidth, listWidth],
+  () => {
+    computeScrollWidth();
+  },
+  { immediate: true }
+);
 </script>
 
 <template>
   <div
+    ref="tabsContainer"
     :class="{
       'tabs--container--with-border': border,
       'tabs--container--compact': isCompact,
@@ -76,7 +83,7 @@ onMounted(() => {
     >
       <fluent-icon icon="chevron-left" :size="16" />
     </button>
-    <ul :class="{ 'tabs--with-scroll': hasScroll }" class="tabs">
+    <ul ref="tabsList" :class="{ 'tabs--with-scroll': hasScroll }" class="tabs">
       <slot />
     </ul>
     <button