chore: remove env files and update gitignore for python

Remove sensitive environment files from repository tracking and add comprehensive Python ignore patterns including virtual environments, cache files, and environment variables. Also clean up staged __pycache__ binary files.

.env

@@ -1,2 +0,0 @@
-VITE_API_URL=/v1/completions
-VITE_OCR_URL=/v1/ocr

.gitignore

@@ -12,6 +12,23 @@ dist
 dist-ssr
 *.local
 
+# Python
+__pycache__/
+*.py[cod]
+*.pyc.*
+.python-version
+.venv/
+venv/
+env/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+
+# Env files
+.env
+.env.*
+!.env.example
+
 # Editor directories and files
 .vscode/*
 !.vscode/extensions.json

backend/.env

@@ -1,4 +0,0 @@
-OPENAI_API_KEY=ollama
-OLLAMA_HOST=http://192.168.0.120:11434
-OLLAMA_MODEL=gpt-oss:20b
-VLM_MODEL=qwen3-vl:30b