feat: enhance chat functionality with new conversation and meeting room features

- Added support for creating and managing group conversations and meeting rooms, allowing users to initiate discussions with multiple participants.
- Implemented a modal for creating new conversations, including options for individual, group, and meeting room types.
- Enhanced the chat list component to filter and display conversations based on type, improving user navigation.
- Introduced admin functionalities for meeting rooms, enabling user management and role assignments within the chat interface.
- Updated backend schema and API to accommodate new conversation types and related operations, ensuring robust data handling.

packages/backend/convex/schema.ts

@@ -619,10 +619,11 @@ export default defineSchema({
 
   // Sistema de Chat
   conversas: defineTable({
-    tipo: v.union(v.literal("individual"), v.literal("grupo")),
-    nome: v.optional(v.string()), // nome do grupo
-    avatar: v.optional(v.string()), // avatar do grupo
+    tipo: v.union(v.literal("individual"), v.literal("grupo"), v.literal("sala_reuniao")),
+    nome: v.optional(v.string()), // nome do grupo/sala
+    avatar: v.optional(v.string()), // avatar do grupo/sala
     participantes: v.array(v.id("usuarios")), // IDs dos participantes
+    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()),
     criadoPor: v.id("usuarios"),