Improve EPUB restoration, book terminology and Calibre QA workflow

src/translation/manifest_manager.py

@@ -38,8 +38,11 @@ class ManifestManager:
         try:
             # Pydantic v2: model_dump(mode='json') or just list dump
             data = [entry.model_dump(mode='json') for entry in self.entries]
-            with open(self.manifest_path, 'w', encoding='utf-8') as f:
+            self.manifest_path.parent.mkdir(parents=True, exist_ok=True)
+            temp = self.manifest_path.with_suffix('.tmp')
+            with open(temp, 'w', encoding='utf-8') as f:
                 json.dump(data, f, indent=2, ensure_ascii=False)
+            temp.replace(self.manifest_path)
             logger.info(f"Saved {len(self.entries)} entries to manifest.")
         except Exception as e:
             logger.error(f"Failed to save manifest: {e}")
@@ -50,16 +53,18 @@ class ManifestManager:
         Adds new entries to the manifest.
         If an entry with the same ID exists, it keeps the EXISTING one (to preserve translations).
         """
-        count = 0
+        # Re-extraction is authoritative for source text/maps. Keep a translation
+        # only if both stayed identical; remove stale entries after force-clean.
+        reconciled = []
         for entry in new_entries:
-            if entry.entry_id not in self._entries_map:
-                self.entries.append(entry)
-                self._entries_map[entry.entry_id] = entry
-                count += 1
-        
-        if count > 0:
-            logger.info(f"Added {count} new entries to manifest.")
-            
+            previous = self._entries_map.get(entry.entry_id)
+            if previous and previous.original_text == entry.original_text and previous.placeholders == entry.placeholders:
+                reconciled.append(previous)
+            else:
+                reconciled.append(entry)
+        self.entries = reconciled
+        self._rebuild_map()
+
     def update_translation(self, entry_id: str, translation: str):
         """Updates translation for a specific entry."""
         if entry_id in self._entries_map: