[playground] Fix incorrect ci path and change reporter (#31572)

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[//]: # (BEGIN SAPLING FOOTER)
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with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31572).
* #31573
* __->__ #31572

.github/workflows/compiler_playground.yml

@@ -6,7 +6,7 @@ on:
   pull_request:
     paths:
       - compiler/**
-      - .github/workflows/compiler-playground.yml
+      - .github/workflows/compiler_playground.yml
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.run_id }}
@@ -44,10 +44,12 @@ jobs:
       - name: yarn install playground
         run: yarn install --frozen-lockfile
       - run: npx playwright install --with-deps chromium
-      - run: yarn test
+      - run: CI=true yarn test
+      - run: ls -R test-results
+        if: '!cancelled()'
       - name: Archive test results
         if: '!cancelled()'
         uses: actions/upload-artifact@v4
         with:
           name: test-results
-          path: test-results
+          path: compiler/apps/playground/test-results

compiler/apps/playground/playwright.config.js

@@ -36,6 +36,10 @@ export default defineConfig({
     reuseExistingServer: !process.env.CI,
   },
 
+  // 'github' for GitHub Actions CI to generate annotations, plus a concise 'dot'
+  // default 'list' when running locally
+  reporter: process.env.CI ? 'github' : 'list',
+
   use: {
     // Use baseURL so to make navigations relative.
     // More information: https://playwright.dev/docs/api/class-testoptions#test-options-base-url