Codex bootstrap for #1687

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Source Issue #1687: CLI: trend-app and trend-run

Source: #1687

Topic GUID: 113cc661-346f-5159-9c31-347c2db1323b

Why

Summary
Provide a console entry point for the app and a headless runner that reads a config and produces a report.
Scope / Tasks
In pyproject.toml, add scripts:
trend-app = trend_model.app:main (launches Streamlit entry)
trend-run = trend_model.cli:run (reads a TOML/YAML config, runs backtest, writes report)
Add docs/CLI.md with examples.

Tasks

Not provided.

Acceptance criteria

pip install -e . then trend-app launches the GUI; trend-run -c config/trend.toml -o reports/run.html produces a report.

Context
pyproject.toml is present in the repo.
GitHub

Implementation notes

Not provided.

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