feat: add support chat widget demo and state management

- Implemented SupportWidgetDemo component for configuring and mounting the support chat widget.
- Introduced Zustand store for managing support chat state, including message handling and socket connection.
- Created support host bridge for communication between the widget and parent window.
- Added utility functions for JWT token generation and local storage management.
- Enhanced user experience with notifications for new messages and chat status updates.

web/components/support-chat/customer-message-editor.tsx

@@ -0,0 +1,34 @@
+"use client"
+
+import {
+  SharedMessageEditor,
+  type UploadedMessageEditorImage,
+} from "@/components/chat/shared-message-editor"
+
+type CustomerMessageEditorProps = {
+  disabled?: boolean
+  uploadingAsset?: boolean
+  onSend: (html: string) => Promise<void>
+  onUploadImage: (file: File) => Promise<UploadedMessageEditorImage | null>
+  onSendAttachment: (file: File) => Promise<void>
+}
+
+export function CustomerMessageEditor({
+  disabled = false,
+  uploadingAsset = false,
+  onSend,
+  onUploadImage,
+  onSendAttachment,
+}: CustomerMessageEditorProps) {
+  return (
+    <SharedMessageEditor
+      variant="customer"
+      disabled={disabled}
+      uploadingAsset={uploadingAsset}
+      manageLocalUploading
+      onSend={onSend}
+      onUploadImage={onUploadImage}
+      onSendAttachment={onSendAttachment}
+    />
+  )
+}