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.

packages/backend/convex/schema.ts

@@ -626,6 +626,7 @@ export default defineSchema({
     administradores: v.optional(v.array(v.id("usuarios"))), // IDs dos administradores (apenas para sala_reuniao)
     ultimaMensagem: v.optional(v.string()),
     ultimaMensagemTimestamp: v.optional(v.number()),
+    ultimaMensagemRemetenteId: v.optional(v.id("usuarios")), // ID do remetente da última mensagem
     criadoPor: v.id("usuarios"),
     criadoEm: v.number(),
   })