fix: update dependencies and improve chat component structure

- Updated `lucide-svelte` dependency to version 0.552.0 across multiple files for consistency.
- Refactored chat components to enhance structure and readability, including adjustments to the Sidebar, ChatList, and MessageInput components.
- Improved notification handling in chat components to ensure better user experience and responsiveness.
- Added type safety enhancements in various components to ensure better integration with backend data models.

apps/web/package.json

@@ -44,6 +44,7 @@
     "emoji-picker-element": "^1.27.0",
     "jspdf": "^3.0.3",
     "jspdf-autotable": "^5.0.2",
+    "lucide-svelte": "^0.552.0",
     "papaparse": "^5.4.1",
     "svelte-sonner": "^1.0.5",
     "zod": "^4.1.12"