revert: remove Lighthouse PR comment feature

Keep simple workflow — scores available via artifacts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: braboj

.github/workflows/lighthouse.yml

@@ -8,8 +8,6 @@ on:
 jobs:
   lighthouse:
     runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -33,63 +31,7 @@ jobs:
         run: npm run build
 
       - name: Lighthouse CI
-        id: lhci
         uses: treosh/lighthouse-ci-action@v12
         with:
           configPath: ./lighthouserc.json
           uploadArtifacts: true
-
-      - name: Post Lighthouse scores to PR
-        uses: actions/github-script@v7
-        with:
-          script: |
-            const fs = require('fs');
-            const path = require('path');
-            const dir = '.lighthouseci';
-            const files = fs.readdirSync(dir).filter(f => f.endsWith('.json') && !f.startsWith('manifest'));
-            const rows = [];
-            for (const f of files) {
-              const raw = JSON.parse(fs.readFileSync(path.join(dir, f), 'utf8'));
-              const r = raw.lhr || raw;
-              if (!r.categories) continue;
-              const rawUrl = r.finalDisplayedUrl || r.finalUrl || r.requestedUrl || '';
-              const pagePath = rawUrl.startsWith('http') ? new URL(rawUrl).pathname : rawUrl || f;
-              const scores = r.categories;
-              const fmt = (cat) => {
-                if (!scores[cat]) return 'N/A';
-                const s = Math.round(scores[cat].score * 100);
-                const icon = s >= 90 ? '🟢' : s >= 50 ? '🟠' : '🔴';
-                return `${icon} ${s}`;
-              };
-              rows.push(`| ${pagePath} | ${fmt('performance')} | ${fmt('accessibility')} | ${fmt('best-practices')} | ${fmt('seo')} |`);
-            }
-            const body = [
-              '## Lighthouse Results',
-              '',
-              '| Page | Performance | Accessibility | Best Practices | SEO |',
-              '|------|------------|---------------|----------------|-----|',
-              ...rows,
-              '',
-              '_Scores: 🟢 90+ · 🟠 50-89 · 🔴 0-49_'
-            ].join('\n');
-            const { data: comments } = await github.rest.issues.listComments({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: context.issue.number,
-            });
-            const existing = comments.find(c => c.body.includes('## Lighthouse Results'));
-            if (existing) {
-              await github.rest.issues.updateComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                comment_id: existing.id,
-                body,
-              });
-            } else {
-              await github.rest.issues.createComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: context.issue.number,
-                body,
-              });
-            }