CI/CD Optimization: Guard Rails, Pre-commit Checks, and Test Fixes (#90)

* CI/CD Optimization: Guard Rails, Black Linting, and Pre-commit Hooks

- Fixed all test collection errors (Selenium imports, fixture paths, syntax)
- Implemented pre-commit hooks with Black formatting and isort
- Created comprehensive Makefile with test targets (unit, integration, functional, e2e)
- Added pytest.ini with marker definitions for test categorization
- Established guard rails to prevent future collection errors
- Wrapped optional dependencies (Selenium, MoviePy) in try-except blocks
- Added conftest_markers for automatic test categorization

This ensures a smooth development stream with:
- Fast feedback loops (pre-commit checks before push)
- Consistent code formatting (Black)
- Reliable CI/CD (no collection errors, proper test isolation)
- Clear test organization (unit, integration, functional, E2E)

* Fix CI/CD test failures:
- Export templates from dashboard.app
- Fix model name assertion in test_agent.py
- Fix platform-agnostic path resolution in test_path_resolution.py
- Skip Docker tests in test_docker_deployment.py if docker not available
- Fix test_model_fallback_chain logic in test_ollama_integration.py

* Add preventative pre-commit checks and Docker test skipif decorators:
- Create pre_commit_checks.py script for common CI failures
- Add skipif decorators to Docker tests
- Improve test robustness for CI environments

tests/functional/test_fast_e2e.py

@@ -7,15 +7,20 @@ import os
 
 import pytest
 import httpx
-from selenium import webdriver
-from selenium.webdriver.chrome.options import Options
-from selenium.webdriver.common.by import By
-from selenium.webdriver.support import expected_conditions as EC
-from selenium.webdriver.support.ui import WebDriverWait
+
+try:
+    from selenium import webdriver
+    from selenium.webdriver.chrome.options import Options
+    from selenium.webdriver.common.by import By
+    from selenium.webdriver.support import expected_conditions as EC
+    from selenium.webdriver.support.ui import WebDriverWait
+    HAS_SELENIUM = True
+except ImportError:
+    HAS_SELENIUM = False
 
 pytestmark = pytest.mark.skipif(
-    os.environ.get("SELENIUM_UI") != "1",
-    reason="Set SELENIUM_UI=1 to run Selenium UI tests",
+    not HAS_SELENIUM or os.environ.get("SELENIUM_UI") != "1",
+    reason="Selenium not installed or SELENIUM_UI not set to 1",
 )
 
 DASHBOARD_URL = os.environ.get("DASHBOARD_URL", "http://localhost:8000")