feat: add Google code retrieval across desktop CLI and MCP

tools/desktop-capture/backend/src/main.rs

@@ -35,6 +35,7 @@ struct Args {
 #[derive(Default, Deserialize)]
 #[serde(deny_unknown_fields)]
 struct Filters {
+    code_only: Option<bool>,
     folder: Option<PathBuf>,
     extension: Option<String>,
     min_size: Option<u64>,
@@ -53,6 +54,7 @@ impl Filters {
             );
         }
         Ok(SearchOptions {
+            code_only: self.code_only.unwrap_or(false),
             folder: self.folder,
             extension: self.extension,
             min_size: self.min_size,