fix(lighthouse): set LHCI_CHROME_PATH and lower thresholds per CTO feedback

- Set LHCI_CHROME_PATH to Playwright chromium binary path so LHCI
  healthcheck can find Chrome
- Lower thresholds: performance=0.5, accessibility=0.7 (error), seo=0.7
- SEO threshold was missing, now added

.github/workflows/ci.yml

@@ -76,6 +76,8 @@ jobs:
           npm install -g playwright
           npx playwright install chromium
       - name: Run Lighthouse CI
+        env:
+          LHCI_CHROME_PATH: /home/runner/.cache/ms-playwright/chromium-1208/chrome-linux/chrome
         run: |
           npm install -g @lhci/cli
           lhci autorun

lighthouserc.json

@@ -8,9 +8,10 @@
     "assert": {
       "preset": "lighthouse:no-pwa",
       "assertions": {
-        "categories:performance": ["warn", { "minScore": 0.7 }],
-        "categories:accessibility": ["error", { "minScore": 0.9 }],
-        "categories:best-practices": ["warn", { "minScore": 0.8 }]
+        "categories:performance": ["warn", { "minScore": 0.5 }],
+        "categories:accessibility": ["error", { "minScore": 0.7 }],
+        "categories:best-practices": ["warn", { "minScore": 0.8 }],
+        "categories:seo": ["warn", { "minScore": 0.7 }]
       }
     },
     "upload": {