consolidate version check, flush instead of wait

src/tui/__init__.py

@@ -1,8 +1,5 @@
 """OpenRAG Terminal User Interface package."""
 
-from importlib.metadata import version
+from .utils.version_check import get_current_version
 
-try:
-    __version__ = version("openrag")
-except Exception:
-    __version__ = "unknown"
+__version__ = get_current_version()

src/tui/managers/env_manager.py

@@ -590,14 +590,21 @@ class EnvManager:
                             break
                     new_lines.insert(insert_pos, f"OPENRAG_VERSION={self._quote_env_value(current_version)}")
                 
-                self.env_file.write_text("\n".join(new_lines) + "\n")
+                with open(self.env_file, 'w') as f:
+                    f.write("\n".join(new_lines) + "\n")
+                    f.flush()
+                    os.fsync(f.fileno())
             else:
                 # Create new .env file with just OPENRAG_VERSION
-                self.env_file.write_text(
-                    f"# OpenRAG Environment Configuration\n"
-                    f"# Generated by OpenRAG TUI\n\n"
-                    f"OPENRAG_VERSION={self._quote_env_value(current_version)}\n"
-                )
+                with open(self.env_file, 'w') as f:
+                    content = (
+                        f"# OpenRAG Environment Configuration\n"
+                        f"# Generated by OpenRAG TUI\n\n"
+                        f"OPENRAG_VERSION={self._quote_env_value(current_version)}\n"
+                    )
+                    f.write(content)
+                    f.flush()
+                    os.fsync(f.fileno())
         except Exception as e:
             logger.debug(f"Error ensuring OPENRAG_VERSION: {e}")