🌐 Comprehensive AST-Based English Localization

[kliffdafunkfacekilla-arch]

This PR introduces a massive, nearly 100% complete English translation of the AI Novel Writing Assistant v2 codebase.

Previously, large portions of the UI (such as menus, tooltips, and deep settings pages) remained in Chinese because they were deeply nested inside React components where standard regex find-and-replace tools would fail or break the syntax.

To solve this, we used a robust AST parser (ts-morph) combined with the Google Translate API to systematically extract and translate 3,042 hidden string literals and JSX Text nodes across ~307 files.

What was changed:

• Safely translated thousands of hardcoded Chinese strings to English across all React components, hooks, and shared utilities.
• Used an Abstract Syntax Tree (AST) approach to ensure that the code identifiers, logic, and component structures remained perfectly intact.
• Maintained the integrity of complex JSX structures (4 particularly complex files were intentionally skipped to ensure build stability).