fix(tauri): serialize DeleteMeetingsResponse with camelCase for TypeScript

The Rust struct used snake_case field names (succeeded_ids, deleted_count)
but TypeScript expected camelCase (succeededIds, deletedCount), causing
'result.succeededIds is not iterable' error.

Added #[serde(rename_all = "camelCase")] to match the existing pattern
used by other response types in the codebase.

client/src-tauri/src/grpc/types/core.rs

@@ -361,6 +361,7 @@ pub struct DeleteMeetingsRequest {
 
 /// Response from bulk delete operation
 #[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct DeleteMeetingsResponse {
     pub deleted_count: i32,
     pub succeeded_ids: Vec<String>,