Improve parent dedup: handle renamed/added/deleted children + show parent context in output

crates/sem-cli/src/formatters/terminal.rs

@@ -85,12 +85,21 @@ pub fn format_terminal(result: &DiffResult, verbose: bool) -> String {
             };
 
             let type_label = format!("{:<10}", change.entity_type);
-            let name_display = if let Some(ref old_name) = change.old_entity_name {
+            let base_name = if let Some(ref old_name) = change.old_entity_name {
                 format!("{old_name} -> {}", change.entity_name)
             } else {
                 change.entity_name.clone()
             };
-            let name_label = format!("{:<25}", name_display);
+            let display_name = match &change.parent_name {
+                Some(p) => format!("{}::{}", p, base_name),
+                None => base_name,
+            };
+            let truncated = if display_name.len() > 25 {
+                format!("{}…", &display_name[..24])
+            } else {
+                display_name
+            };
+            let name_label = format!("{:<25}", truncated);
 
             lines.push(format!(
                 "{}  {} {} {} {}",

crates/sem-core/src/model/change.rs

@@ -32,6 +32,8 @@ pub struct SemanticChange {
     pub entity_name: String,
     #[serde(default)]
     pub entity_line: usize,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub parent_name: Option<String>,
     pub file_path: String,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub old_entity_name: Option<String>,