feat(lint): add Playwright ESLint rules (#8960)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Carson McManus <carson.mcmanus1@gmail.com>

Author: 4 people

.changeset/no-conditional-expect.md

@@ -0,0 +1,19 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noConditionalExpect`](https://biomejs.dev/linter/rules/no-conditional-expect/). This rule disallows conditional `expect()` calls inside tests, which can lead to tests that silently pass when assertions never run.
+
+```js
+// Invalid - conditional expect may not run
+test("conditional", async ({ page }) => {
+    if (someCondition) {
+        await expect(page).toHaveTitle("Title");
+    }
+});
+
+// Valid - unconditional expect
+test("unconditional", async ({ page }) => {
+    await expect(page).toHaveTitle("Title");
+});
+```

.changeset/no-playwright-element-handle.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightElementHandle`](https://biomejs.dev/linter/rules/no-playwright-element-handle/). Prefers locators to element handles.
+
+```js
+const el = await page.$('.btn');
+```

.changeset/no-playwright-eval.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightEval`](https://biomejs.dev/linter/rules/no-playwright-eval/). Disallows `page.$eval()` and `page.$$eval()` methods.
+
+```js
+await page.$eval('.btn', el => el.textContent);
+```

.changeset/no-playwright-force-option.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightForceOption`](https://biomejs.dev/linter/rules/no-playwright-force-option/). Disallows the `force` option on user interactions.
+
+```js
+await locator.click({ force: true });
+```

.changeset/no-playwright-missing-await.md

@@ -0,0 +1,10 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightMissingAwait`](https://biomejs.dev/linter/rules/no-playwright-missing-await/). Enforces awaiting async Playwright APIs.
+
+```js
+const el = page.locator('.btn');
+el.click(); // Missing await
+```

.changeset/no-playwright-networkidle.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightNetworkidle`](https://biomejs.dev/linter/rules/no-playwright-networkidle/). Disallows deprecated `networkidle` wait option.
+
+```js
+await page.goto(url, { waitUntil: 'networkidle' });
+```

.changeset/no-playwright-page-pause.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightPagePause`](https://biomejs.dev/linter/rules/no-playwright-page-pause/). Disallows `page.pause()` debugging calls in committed code.
+
+```js
+await page.pause();
+```

.changeset/no-playwright-useless-await.md

@@ -0,0 +1,10 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightUselessAwait`](https://biomejs.dev/linter/rules/no-playwright-useless-await/). Disallows unnecessary `await` on synchronous Playwright methods.
+
+```js
+// Incorrect - locator() is synchronous
+const loc = await page.locator('.btn');
+```

.changeset/no-playwright-wait-for-navigation.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightWaitForNavigation`](https://biomejs.dev/linter/rules/no-playwright-wait-for-navigation/). Prefers modern navigation APIs over deprecated `waitForNavigation()`.
+
+```js
+await page.waitForNavigation();
+```

.changeset/no-playwright-wait-for-selector.md

@@ -0,0 +1,9 @@
+---
+"@biomejs/biome": patch
+---
+
+Added the nursery rule [`noPlaywrightWaitForSelector`](https://biomejs.dev/linter/rules/no-playwright-wait-for-selector/). Prefers locators over deprecated `waitForSelector()`.
+
+```js
+await page.waitForSelector('.btn');
+```