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/conftest_markers.py

@@ -0,0 +1,59 @@
+"""Pytest configuration for test markers and categorization.
+
+This module registers pytest markers for test categorization without modifying
+individual test files. All tests are automatically categorized based on their
+location in the test directory structure.
+"""
+
+import pytest
+
+
+def pytest_configure(config):
+    """Register custom pytest markers."""
+    markers = [
+        "unit: Unit tests (fast, no I/O, no external services)",
+        "integration: Integration tests (may use SQLite, in-process agents)",
+        "functional: Functional tests (real HTTP requests, no mocking)",
+        "e2e: End-to-end tests (full system, may be slow)",
+        "slow: Tests that take >1 second",
+        "selenium: Requires Selenium and Chrome (browser automation)",
+        "docker: Requires Docker and docker-compose",
+        "ollama: Requires Ollama service running",
+        "external_api: Requires external API access",
+        "skip_ci: Skip in CI environment (local development only)",
+    ]
+    for marker in markers:
+        config.addinivalue_line("markers", marker)
+
+
+def pytest_collection_modifyitems(config, items):
+    """Automatically assign markers to tests based on file location."""
+    for item in items:
+        test_path = str(item.fspath)
+        
+        # Categorize based on directory
+        if "e2e" in test_path:
+            item.add_marker(pytest.mark.e2e)
+            item.add_marker(pytest.mark.slow)
+        elif "functional" in test_path:
+            item.add_marker(pytest.mark.functional)
+        elif "integration" in test_path:
+            item.add_marker(pytest.mark.integration)
+        else:
+            item.add_marker(pytest.mark.unit)
+        
+        # Add additional markers based on test name/path
+        if "selenium" in test_path or "ui_" in item.name:
+            item.add_marker(pytest.mark.selenium)
+            item.add_marker(pytest.mark.skip_ci)
+        
+        if "docker" in test_path:
+            item.add_marker(pytest.mark.docker)
+            item.add_marker(pytest.mark.skip_ci)
+        
+        if "ollama" in test_path or "test_ollama" in item.name:
+            item.add_marker(pytest.mark.ollama)
+        
+        # Mark slow tests
+        if "slow" in item.name:
+            item.add_marker(pytest.mark.slow)