feat: complete tree shell cutover and regression coverage

rust/crates/mnote-web/src/tree_shell/filetree_renderer.rs

@@ -0,0 +1,21 @@
+use super::protocol;
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct FileTreeRenderRow {
+    pub row_id: String,
+    pub row_kind: String,
+    pub title: String,
+}
+
+pub fn build_filetree_testids(rows: &[FileTreeRenderRow]) -> Vec<(&'static str, String)> {
+    rows.iter()
+        .map(|row| {
+            let test_id = match row.row_kind.as_str() {
+                "document" => protocol::TEST_ID_FILETREE_DOC_ROW,
+                "index" => protocol::TEST_ID_FILETREE_INDEX_ROW,
+                _ => protocol::TEST_ID_FILETREE_ASSET_ROW,
+            };
+            (test_id, row.row_id.clone())
+        })
+        .collect()
+}