fix: production-level hardening — bug fix, tests, and CI

[Copilot]

pipeline.py crashed at runtime with a NameError and had zero test coverage. CI was running a no-op smoke test that never caught regressions.

Changes

• Bug fix — BRAND[gradient] → BRAND["gradient"] in pipeline.py:export_tokens(); the bare name gradient was never defined, crashing every pipeline run
• Tests — 21 pytest tests across tests/test_pipeline.py and tests/test_theme_generator.py covering SVG rendering, token export (CSS/JSON/Tailwind), brand palette correctness, forbidden color enforcement, and golden-ratio gradient stops
• CI — replaced the || true smoke test in ci.yml with python -m pytest tests/ -v
• README — added 🟢 GREEN LIGHT status badge per the BlackRoad Traffic Light System
• .gitignore — added **/__pycache__/ and *.pyc

# Before — crashes every time export_tokens() is called
css += f"  --gradient-brand: {BRAND[gradient]};\n"  # NameError: name 'gradient' is not defined

# After
css += f"  --gradient-brand: {BRAND['gradient']};\n"

Original prompt

Get it production level please

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[Copilot]

Pull request overview

Hardens the studio tooling by fixing a runtime crash in the asset pipeline, adding pytest coverage for token/theme generation, and making CI execute the test suite so regressions are caught.

Changes:

• Fix export_tokens() runtime NameError by correctly indexing BRAND["gradient"].
• Add pytest coverage for pipeline.py and theme_generator.py outputs (CSS/JSON/Tailwind, gradients, forbidden colors).
• Update CI workflow to run pytest (and install test/lint dependencies).

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/pipeline.py	Fixes export_tokens() crash by correctly referencing the gradient token.
tests/test_pipeline.py	Adds tests for SVG rendering + token export behavior.
tests/test_theme_generator.py	Adds tests validating CSS/JSON/Tailwind token generation and brand rules.
.github/workflows/ci.yml	Runs pytest in CI and installs pytest/flake8.
README.md	Adds Traffic Light status section at the top.
.gitignore	Ignores Python bytecode and __pycache__ directories.

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