refactor: rename PluginResponse to MetaPluginResponse

Co-authored-by: aider (openai/andrew/openrouter/mistralai/mistral-medium-3.1) <aider@aider.chat>

src/meta_plugin/program.rs

@@ -122,10 +122,10 @@ impl MetaPlugin for MetaPluginProgram {
         self.writer = Some(Box::new(stdin));
         self.process = Some(process);
 
-        Ok(PluginResponse::default())
+        Ok(MetaPluginResponse::default())
     }
 
-    fn finalize(&mut self) -> Result<PluginResponse> {
+    fn finalize(&mut self) -> Result<MetaPluginResponse> {
         debug!("META: Finalizing program plugin");
         let mut metadata = Vec::new();
 
@@ -165,13 +165,13 @@ impl MetaPlugin for MetaPluginProgram {
             }
         }
 
-        Ok(PluginResponse {
+        Ok(MetaPluginResponse {
             metadata: if metadata.is_empty() { None } else { Some(metadata) },
             is_finalized: true,
         })
     }
 
-    fn update(&mut self, data: &[u8]) -> Result<PluginResponse> {
+    fn update(&mut self, data: &[u8]) -> Result<MetaPluginResponse> {
         if let Some(ref mut writer) = self.writer {
             if let Err(e) = writer.write_all(data) {
                 debug!("META: Failed to write to process stdin: {}", e);