diff --git a/libs/observability/src/push.rs b/libs/observability/src/push.rs
index 17feb4b..dcfe3ca 100644
--- a/libs/observability/src/push.rs
+++ b/libs/observability/src/push.rs
@@ -308,10 +308,10 @@ mod tests {
 
     #[test]
     fn payload_serialises_to_json() {
-        let pusher = MetricsPusher::new("http://localhost:9090", "test-app");
+        let _pusher = MetricsPusher::new("http://localhost:9090", "test-app");
         let metrics = HttpMetrics::new();
         metrics.request_count.fetch_add(42, std::sync::atomic::Ordering::Relaxed);
-        let handle = metrics_exporter_prometheus::PrometheusBuilder::new()
+        let _handle = metrics_exporter_prometheus::PrometheusBuilder::new()
             .build_recorder()
             .handle();
         // Don't set global recorder in tests — it conflicts with other tests.
diff --git a/libs/service/chat/conversation.rs b/libs/service/chat/conversation.rs
index 889ed3a..21aabb7 100644
--- a/libs/service/chat/conversation.rs
+++ b/libs/service/chat/conversation.rs
@@ -193,8 +193,10 @@ impl AppService {
                 }
             }
         } else {
-            // Personal scope — only own chats
-            query = query.filter(ai_conversation::Column::UserId.eq(user_id));
+            // Personal scope — only own chats without a project
+            query = query
+                .filter(ai_conversation::Column::UserId.eq(user_id))
+                .filter(ai_conversation::Column::ProjectId.is_null());
         }
 
         let convs = query.paginate(self.db.reader(), page_size).fetch_page(0).await?;
diff --git a/libs/service/search/service.rs b/libs/service/search/service.rs
index f0a100a..dd604f4 100644
--- a/libs/service/search/service.rs
+++ b/libs/service/search/service.rs
@@ -242,10 +242,6 @@ impl AppService {
         let page = Ord::max(params.page.unwrap_or(1), 1u32);
         let per_page = Ord::min(params.per_page.unwrap_or(20), 100u32);
         let query = params.q.trim();
-        if query.is_empty() {
-            return Err(AppError::BadRequest("q is required".to_string()));
-        }
-
         let types = parse_types(params.r#type);
         let user_id = ctx.user();
         let accessible = accessible_project_ids(&self.db, user_id).await?;