feat: Release v0.10 - Modular Architecture & External Config

- Refactor codebase into src/ (preprocessing, translation, assembly)
- Add pipeline/ scripts for individual stages
- Externalize configuration to config/config.yaml
- Fix Cover Image preservation
- Update documentation and manuals

scripts/build_translated_epub.py

@@ -0,0 +1,51 @@
+import sys
+from pathlib import Path
+import traceback
+
+# Add src to path
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from src.data_model import BookStructure, ManifestEntry
+from src.manifest_manager import ManifestManager
+from src.backfill_engine import BackfillEngine
+from src.bilingual_builder import BilingualBuilder
+from src.utils import setup_logger
+
+logger = setup_logger("build_final")
+
+def build_final():
+    BOOK_NAME = "Empire of AI Dreams and Nightmares in Sam Altmans OpenAI (Karen Hao)"
+    WORK_DIR = Path(f".work/{BOOK_NAME}")
+    MANIFEST_PATH = WORK_DIR / "manifest.json"
+    STRUCTURE_PATH = WORK_DIR / "book_structure.json"
+    OUTPUT_EPUB = Path("output/final_verification.epub")
+    INPUT_EPUB = Path(f"input/{BOOK_NAME}.epub")
+
+    if not MANIFEST_PATH.exists() or not STRUCTURE_PATH.exists():
+        logger.error("Missing manifest or structure. Run translation first.")
+        return
+
+    # 1. Load Data
+    logger.info("Loading structure and manifest...")
+    structure = BookStructure.load(STRUCTURE_PATH)
+    manager = ManifestManager(MANIFEST_PATH)
+    manager.load()
+
+    # 2. Backfill
+    logger.info("Backfilling translations...")
+    backfiller = BackfillEngine()
+    structure = backfiller.backfill(structure, manager.entries, mode="bilingual")
+
+    # 3. Build
+    logger.info(f"Building final EPUB to {OUTPUT_EPUB}...")
+    builder = BilingualBuilder(WORK_DIR, original_epub_path=INPUT_EPUB)
+    builder.build(structure, OUTPUT_EPUB)
+    
+    logger.info("Build complete.")
+
+if __name__ == "__main__":
+    try:
+        build_final()
+    except Exception as e:
+        traceback.print_exc()
+        print(f"CRITICAL ERROR: {e}")