chore: Use widget color for chat input focus state (#13214)

app/javascript/widget/App.vue

@@ -82,6 +82,7 @@ export default {
     const { websiteToken, locale, widgetColor } = window.chatwootWebChannel;
     this.setLocale(locale);
     this.setWidgetColor(widgetColor);
+    this.setWidgetColorVariable(widgetColor);
     setHeader(window.authToken);
     if (this.isIFrame) {
       this.registerListeners();
@@ -114,6 +115,14 @@ export default {
       'resetCampaign',
     ]),
     ...mapActions('agent', ['fetchAvailableAgents']),
+    setWidgetColorVariable(widgetColor) {
+      if (widgetColor) {
+        document.documentElement.style.setProperty(
+          '--widget-color',
+          widgetColor
+        );
+      }
+    },
     scrollConversationToBottom() {
       const container = this.$el.querySelector('.conversation-wrap');
       container.scrollTop = container.scrollHeight;

app/javascript/widget/components/ChatInputWrap.vue

@@ -130,7 +130,7 @@ export default {
   <div
     class="items-center flex ltr:pl-3 rtl:pr-3 ltr:pr-2 rtl:pl-2 rounded-[7px] transition-all duration-200 bg-n-background !shadow-[0_0_0_1px,0_0_2px_3px]"
     :class="{
-      '!shadow-n-brand dark:!shadow-n-brand': isFocused,
+      '!shadow-[var(--widget-color,#2781f6)]': isFocused,
       '!shadow-n-strong dark:!shadow-n-strong': !isFocused,
     }"
     @keydown.esc="hideEmojiPicker"