fix: improve i18n translations and fix DOM replacement order

- Fixed 20 translation entries with concatenated words and incorrect formatting
- Fixed critical bug in DOM replacer that caused partial translations
- Sort translation patches by length (longest first) to prevent substring replacement issues
- Fixed TypeScript and ESLint errors
- Added comprehensive documentation of fixes

scripts/README.md

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+# Translation Scripts
+
+This directory contains utility scripts for managing i18n translations.
+
+## Useful Scripts
+
+### `extract_remaining_todos.py`
+Extracts all `[TODO: Translate]` entries from `en.json` for manual translation.
+
+**Usage:**
+```bash
+python scripts/extract_remaining_todos.py
+```
+
+**Output:** `translations-remaining.json` - Contains all untranslated entries
+
+### `import_translations.py`
+Imports translated entries from `translations-remaining.json` back into `en.json`.
+
+**Usage:**
+1. Fill in translations in `translations-remaining.json`
+2. Run: `python scripts/import_translations.py`
+
+### `translate_all.py`
+Contains comprehensive translation dictionary (1200+ entries) for reference.
+Can be used as a base for future translations.
+
+## Workflow for Adding New Translations
+
+When upstream adds new Chinese text:
+
+1. **Extract new TODOs:**
+   ```bash
+   python scripts/extract_remaining_todos.py
+   ```
+
+2. **Translate entries:**
+   Edit `translations-remaining.json` and add English translations
+
+3. **Import translations:**
+   ```bash
+   python scripts/import_translations.py
+   ```
+
+4. **Verify:**
+   Check `en.json` for any remaining `[TODO]` markers
+
+## Translation Guidelines
+
+- **Use full sentences/phrases** - Not word-by-word translation
+- **Context-aware** - Consider where the text appears in the UI
+- **Natural English** - Translate meaning, not literal words
+- **Consistent terminology** - Use same terms for same concepts
+
+## Current Status
+
+- **Total entries:** 3,568
+- **Translated:** 3,568 (100%)
+- **Coverage:** 100%

scripts/extract_remaining_todos.py

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+#!/usr/bin/env python3
+"""Extract remaining TODO entries for manual translation"""
+import json
+from pathlib import Path
+
+EN_FILE = Path(__file__).parent.parent / 'src' / 'i18n' / 'patches' / 'en.json'
+OUTPUT_FILE = Path(__file__).parent.parent / 'translations-remaining.json'
+
+print("Loading en.json...")
+with open(EN_FILE, 'r', encoding='utf-8') as f:
+    data = json.load(f)
+
+# Extract all TODO entries
+todos = {}
+for key, value in data.items():
+    if isinstance(value, str) and value.startswith('[TODO: Translate]'):
+        chinese = value.replace('[TODO: Translate] ', '')
+        todos[chinese] = ""  # Empty string for translation
+
+print(f"Found {len(todos)} entries to translate")
+print(f"Saving to {OUTPUT_FILE}...")
+
+# Save to file
+with open(OUTPUT_FILE, 'w', encoding='utf-8') as f:
+    json.dump(todos, f, ensure_ascii=False, indent=2)
+
+print("Done!")
+print()
+print("Next steps:")
+print("1. Open translations-remaining.json")
+print("2. Fill in English translations for each Chinese text")
+print("3. Run import_translations.py to merge back")

scripts/import_translations.py

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+#!/usr/bin/env python3
+"""Import translations from translations-remaining.json back to en.json"""
+import json
+from pathlib import Path
+
+EN_FILE = Path(__file__).parent.parent / 'src' / 'i18n' / 'patches' / 'en.json'
+INPUT_FILE = Path(__file__).parent.parent / 'translations-remaining.json'
+
+if not INPUT_FILE.exists():
+    print(f"Error: {INPUT_FILE} not found")
+    print("Run extract_remaining_todos.py first")
+    exit(1)
+
+print("Loading translations...")
+with open(INPUT_FILE, 'r', encoding='utf-8') as f:
+    translations = json.load(f)
+
+print("Loading en.json...")
+with open(EN_FILE, 'r', encoding='utf-8') as f:
+    data = json.load(f)
+
+# Apply translations
+count = 0
+for key, value in data.items():
+    if isinstance(value, str) and value.startswith('[TODO: Translate]'):
+        chinese = value.replace('[TODO: Translate] ', '')
+        if chinese in translations and translations[chinese]:
+            data[key] = translations[chinese]
+            count += 1
+
+print(f"Applied {count} translations")
+print("Saving en.json...")
+
+with open(EN_FILE, 'w', encoding='utf-8') as f:
+    json.dump(data, f, ensure_ascii=False, indent=2)
+
+print("Done!")