🐛 Fix: Add APP_VERSION to code.config exports

- Added APP_VERSION to import statement in __init__.py
- Added APP_VERSION to __all__ export list
- Fixes ImportError on startup

code/config/__init__.py

@@ -20,6 +20,7 @@ from typing import Any
 # ── Re-export constants for backward compatibility ─────────────────────
 from code.config.constants import (
     APP_TITLE,
+    APP_VERSION,
     DEFAULT_MAX_TOKENS,
     DEFAULT_MODEL_KEY,
     DEFAULT_TEMPERATURE,
@@ -244,6 +245,7 @@ def load_settings(project_dir: Path | None = None) -> Settings:
 __all__ = [
     # Constants
     "APP_TITLE",
+    "APP_VERSION",
     "DEFAULT_MAX_TOKENS",
     "DEFAULT_MODEL_KEY",
     "DEFAULT_TEMPERATURE",