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

archive/v0.11/.agent/rules/runing-guide.md

@@ -0,0 +1,38 @@
+---
+trigger: always_on
+---
+
+# EPUB Bilingual Translator - File Architecture & Workspace Rules
+
+## 1. Directory Structure
+The project follows a strict modular structure. Code is in `src/`, execution scripts in `pipeline/`, and intermediate data in `.work/`.
+
+.
+├── main.py                     # Entry point (orchestrator)
+├── pipeline/                   # Executable scripts for each stage
+│   ├── 01_preprocess.py        # Step 1: Clean & Extract
+│   ├── 02_translate.py         # Step 2: LLM Translation
+│   └── 03_assemble.py          # Step 3: Backfill & Build
+├── src/                        # Source modules
+│   ├── common/                 # shared utils, config, paths.py
+│   ├── preprocessing/          # epub_cleaner, text_extractor, profiler
+│   ├── translation/            # llm_client, translator_engine, manifest_manager
+│   └── assembly/               # backfiller, builder, format_restorer
+├── config/
+│   ├── config.yaml             # System configuration (LLM, Translation)
+│   └── prompts.json            # LLM Prompts
+└── .work/                      # Working Directory (Gitignored)
+    └── {book_name}/            # One folder per book
+        ├── book_structure.json # Structural skeleton (created by Step 1)
+        ├── manifest.json       # Translation source of truth
+        ├── assets/             # Extracted images/css
+        └── chunks/             # Debug chunks from translation (before/after)
+
+## 2. Path Resolution Rule
+ALWAYS use `src.common.paths.get_work_dirs(input_path)` to resolve paths.
+DO NOT hardcode `work/`, `.work/`, or `tmp/` paths in scripts.
+
+## 3. Data Flow
+1. Preprocess: EPUB -> .work/{book}/book_structure.json + .work/{book}/manifest.json
+2. Translate: .work/{book}/manifest.json (read/write) -> .work/{book}/chunks/ (logs)
+3. Assemble: .work/{book}/manifest.json + .work/{book}/book_structure.json -> output/{book}_bilingual.epub