chore: Adds URL-based search and tab selection (#12663)

# Pull Request Template

## Description

This PR enables URL-based search and tab selection, allowing search
queries and active tabs to persist in the URL for easy sharing.

Fixes
[CW-5766](https://linear.app/chatwoot/issue/CW-5766/cannot-impersonate-an-account),
https://github.com/chatwoot/chatwoot/issues/12623

## Type of change

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

## How Has This Been Tested?

### Loom video

https://www.loom.com/share/422a1d61f3fe4278a88e352ef98d2b78?sid=35fabee7-652f-4e17-83bd-e066a3bb804c

## 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
- [ ] 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/search/components/SearchHeader.vue

@@ -1,10 +1,17 @@
 <script setup>
-import { ref, useTemplateRef, onMounted, onUnmounted } from 'vue';
+import { ref, useTemplateRef, onMounted, onUnmounted, watch } from 'vue';
 import { debounce } from '@chatwoot/utils';
 
+const props = defineProps({
+  initialQuery: {
+    type: String,
+    default: '',
+  },
+});
+
 const emit = defineEmits(['search']);
 
-const searchQuery = ref('');
+const searchQuery = ref(props.initialQuery);
 const isInputFocused = ref(false);
 
 const searchInput = useTemplateRef('searchInput');
@@ -38,6 +45,16 @@ const onBlur = () => {
   isInputFocused.value = false;
 };
 
+watch(
+  () => props.initialQuery,
+  newValue => {
+    if (searchQuery.value !== newValue) {
+      searchQuery.value = newValue;
+    }
+  },
+  { immediate: true }
+);
+
 onMounted(() => {
   searchInput.value.focus();
   document.addEventListener('keydown', handler);