feat(bat): 补全翻译工作台编辑命令

Refs #43

infrastructure/src/translation_workflow.rs

@@ -166,6 +166,37 @@ pub fn set_translation(
     Ok(updated)
 }
 
+/// Reads one translation entry from a workbench.
+pub fn get_translation_entry(
+    workbench_path: &Path,
+    entry_id: &str,
+) -> anyhow::Result<TranslationWorkbenchEntry> {
+    let workbench = read_translation_workbench(workbench_path)?;
+    workbench
+        .entries
+        .into_iter()
+        .find(|entry| entry.id == entry_id)
+        .ok_or_else(|| anyhow::anyhow!("翻译工作台中不存在 TextUnit：{entry_id}"))
+}
+
+/// Clears one reviewed translation and writes the workbench atomically.
+pub fn unset_translation(
+    workbench_path: &Path,
+    entry_id: &str,
+) -> anyhow::Result<TranslationWorkbenchEntry> {
+    let mut workbench = read_translation_workbench(workbench_path)?;
+    let entry = workbench
+        .entries
+        .iter_mut()
+        .find(|entry| entry.id == entry_id)
+        .ok_or_else(|| anyhow::anyhow!("翻译工作台中不存在 TextUnit：{entry_id}"))?;
+    entry.translated_text = None;
+    let updated = entry.clone();
+    workbench.generated_unix_seconds = unix_seconds_now();
+    write_translation_workbench(workbench_path, &workbench)?;
+    Ok(updated)
+}
+
 /// Validates a workbench against the current official TextUnit index.
 ///
 /// This checks the release identity and every stored source/target location
@@ -656,6 +687,23 @@ mod tests {
         assert!(error.to_string().contains("不存在 TextUnit"));
     }
 
+    #[test]
+    fn translation_get_and_unset_round_trip_atomically() {
+        let temp = tempfile::TempDir::new().unwrap();
+        let path = temp.path().join("workbench.json");
+        let mut workbench = workbench(temp.path());
+        workbench.entries[0].translated_text = Some("译文".to_string());
+        write_translation_workbench(&path, &workbench).unwrap();
+
+        let entry = get_translation_entry(&path, "unit-1").unwrap();
+        assert_eq!(entry.translated_text.as_deref(), Some("译文"));
+
+        let updated = unset_translation(&path, "unit-1").unwrap();
+        assert_eq!(updated.translated_text, None);
+        let loaded = read_translation_workbench(&path).unwrap();
+        assert_eq!(loaded.entries[0].translated_text, None);
+    }
+
     #[test]
     fn validation_reports_publishable_and_unreviewed_entries() {
         let temp = tempfile::TempDir::new().unwrap();