# Spec: fix-dashboard-cors-origin

## Problem
`automaton/dashboard/ui/app.py:40-44` sets `Access-Control-Allow-Origin: *` on all responses, including POST and PUT endpoints. Any website open in the user's browser can send cross-origin requests to `localhost:8080`, allowing silent modification of task reviews and config.

## Fix
Remove the wildcard CORS origin. The dashboard is a local single-origin app — CORS headers are unnecessary. Either:
1. Remove `CORS_HEADERS` entirely and stop sending them, OR
2. Set `Access-Control-Allow-Origin` to `http://localhost:{port}` only

Option 1 is simpler and safer. The dashboard serves both the HTML and the API from the same origin, so CORS is not needed.

## Acceptance Criteria
- No `Access-Control-Allow-Origin: *` header in responses
- Cross-origin requests from other websites are blocked by the browser
- Same-origin dashboard HTML can still fetch the API (no CORS needed)
- Existing CORS tests in `test_app.py` updated to reflect the change