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/modules/widget-preview/components/Widget.vue

@@ -140,7 +140,7 @@ export default {
     </div>
     <div
       v-if="isWidgetVisible"
-      class="widget-wrapper flex flex-col justify-between rounded-lg shadow-md bg-slate-25 dark:bg-slate-800 h-[500px] w-[320px]"
+      class="widget-wrapper flex flex-col justify-between rounded-lg shadow-md bg-slate-25 dark:bg-slate-800 h-[31.25rem] w-80"
     >
       <WidgetHead :config="getWidgetConfig" />
       <div>