refactor: Centralize test flags and commands in Makefile

- Add TEST_FLAGS variable for single-threaded test execution
- Create verbose targets for CI usage
- Update pre-commit hooks to use make targets
- Update CI workflow to use make targets
- This ensures consistency between local and CI test execution

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Makefile

@@ -1,9 +1,16 @@
-.PHONY: test test-unit test-e2e build run clean fmt lint
+.PHONY: test test-unit test-e2e build run clean fmt lint check-fmt check test-verbose
+
+# Test flags - run single-threaded to avoid env var races
+TEST_FLAGS := -- --test-threads=1
 
 # Build the project
 build:
 	cargo build
 
+# Build verbosely
+build-verbose:
+	cargo build --verbose
+
 # Run the project
 run:
 	cargo run
@@ -11,13 +18,21 @@ run:
 # Run all tests
 test: test-unit test-e2e
 
+# Run all tests verbosely (for CI)
+test-verbose:
+	cargo test --verbose $(TEST_FLAGS)
+
 # Run unit tests only
 test-unit:
-	cargo test --lib --bins
+	cargo test --lib --bins $(TEST_FLAGS)
 
 # Run e2e tests only
 test-e2e:
-	cargo test --test '*'
+	cargo test --test '*' $(TEST_FLAGS)
+
+# Run e2e tests verbosely (for CI)
+test-e2e-verbose:
+	cargo test --test '*' --verbose $(TEST_FLAGS)
 
 # Clean build artifacts
 clean:
@@ -35,5 +50,9 @@ lint:
 check-fmt:
 	cargo fmt -- --check
 
+# Check code (for pre-commit)
+check-code:
+	cargo check
+
 # Run all checks (format, lint, test)
 check: check-fmt lint test