test(tui): use materialized provider view in paste tests

Author: 1jehuang

src/tui/app/tests/remote_startup_input_03/part_01.rs

@@ -210,9 +210,15 @@ fn test_paste_expansion_on_submit() {
     assert_eq!(app.display_messages().len(), 1);
     assert_eq!(app.display_messages()[0].content, "A: [pasted 5 lines] B");
 
-    // Model receives expanded content (actual pasted text)
-    assert_eq!(app.messages.len(), 1);
-    match &app.messages[0].content[0] {
+    // Model receives expanded content (actual pasted text). Local sessions keep the
+    // provider message cache lazy, so inspect the materialized provider view.
+    let provider_messages = app.materialized_provider_messages();
+    let user_message = provider_messages
+        .iter()
+        .rev()
+        .find(|message| message.role == Role::User)
+        .expect("expected submitted user message");
+    match &user_message.content[0] {
         crate::message::ContentBlock::Text { text, .. } => {
             assert_eq!(text, "A: 1\n2\n3\n4\n5 B");
         }
@@ -240,7 +246,13 @@ fn test_multiple_pastes() {
     app.submit_input();
     // Display and model both get the same content (no expansion needed)
     assert_eq!(app.display_messages()[0].content, "first second\nline");
-    match &app.messages[0].content[0] {
+    let provider_messages = app.materialized_provider_messages();
+    let user_message = provider_messages
+        .iter()
+        .rev()
+        .find(|message| message.role == Role::User)
+        .expect("expected submitted user message");
+    match &user_message.content[0] {
         crate::message::ContentBlock::Text { text, .. } => {
             assert_eq!(text, "first second\nline");
         }