feat: document tests dashboard

Author: gregberge

docs/learn/reliability/tests-dashboard.mdx

@@ -0,0 +1,46 @@
+---
+slug: /tests-dashboard
+sidebar_position: 2
+description: Explore flaky tests at a glance with sortable metrics, filters, and a dedicated test page.
+---
+
+import testsDashboard from "./tests-dashboard.png";
+
+# Tests Dashboard
+
+The Tests dashboard gives you a project-wide view of test stability. It lists all tests sorted by flakiness score so the most flaky tests show up first.
+
+<img
+  src={testsDashboard}
+  alt="Tests dashboard showing a list of tests with flakiness metrics"
+  className="rounded border"
+  style={{ marginBottom: 20 }}
+/>
+_A project Tests dashboard with flakiness metrics_
+
+## Open the dashboard
+
+1. Open your project in Argos.
+2. Click the **Tests** tab.
+
+## How tests are ranked
+
+Tests are sorted by **flakiness score** (descending). The tests at the top are the most flaky.
+
+## Columns explained
+
+- **Test**: The latest screenshot uploaded for the test, the test name, and the build name.
+- **Last change**: The most recent change detected on an auto-approved build during the selected period.
+- **Flakiness**: A score that summarizes how flaky a test is based on its stability and consistency.
+- **Changes**: The number of changes detected for the test during the selected period.
+- **Stability**: The ratio of changes to total reference builds. A lower stability rate means the test is more likely to be flaky.
+- **Consistency**: The ratio of one-off changes to total changes. A lower consistency rate means the test is more likely to be flaky.
+
+## Filter and time range
+
+- Filter tests by **build name** to focus on a subset of runs.
+- Choose a **time period** to control which changes and scores are included.
+
+## Open a test page
+
+Click any row to open the detailed test page and review history and stability details. See [Flaky Test Detection](/flaky-test-detection) for more information.