feat: Add GoatCounter analytics and GitHub traffic persistence

- GoatCounter tracking in public/index.html
- Daily GitHub Actions workflow to persist repo traffic data

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mp

.github/workflows/traffic.yml

@@ -0,0 +1,55 @@
+name: Persist GitHub Traffic Data
+
+on:
+  schedule:
+    - cron: '0 1 * * *'  # Täglich um 01:00 UTC
+  workflow_dispatch:  # Manuell auslösbar
+
+permissions:
+  contents: write
+
+jobs:
+  traffic:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Fetch and persist traffic data
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          DATE=$(date -u +%Y-%m-%d)
+          REPO="${{ github.repository }}"
+
+          mkdir -p .github/traffic
+
+          # Traffic-Daten abrufen
+          VIEWS=$(gh api "repos/$REPO/traffic/views" 2>/dev/null || echo '{"count":0,"uniques":0,"views":[]}')
+          CLONES=$(gh api "repos/$REPO/traffic/clones" 2>/dev/null || echo '{"count":0,"uniques":0,"clones":[]}')
+          REFERRERS=$(gh api "repos/$REPO/traffic/popular/referrers" 2>/dev/null || echo '[]')
+          PATHS=$(gh api "repos/$REPO/traffic/popular/paths" 2>/dev/null || echo '[]')
+
+          # Tages-Snapshot als JSONL (eine Zeile pro Tag, einfach appendbar)
+          SNAPSHOT=$(jq -n \
+            --arg date "$DATE" \
+            --argjson views "$VIEWS" \
+            --argjson clones "$CLONES" \
+            --argjson referrers "$REFERRERS" \
+            --argjson paths "$PATHS" \
+            '{date: $date, views: $views, clones: $clones, referrers: $referrers, paths: $paths}')
+
+          # Duplikat-Check (nicht doppelt speichern wenn am selben Tag nochmal läuft)
+          if grep -q "\"date\":\"$DATE\"" .github/traffic/traffic.jsonl 2>/dev/null; then
+            echo "Data for $DATE already exists, skipping."
+          else
+            echo "$SNAPSHOT" >> .github/traffic/traffic.jsonl
+            echo "Added traffic data for $DATE"
+          fi
+
+      - name: Commit if changed
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add .github/traffic/
+          git diff --cached --quiet || git commit -m "chore: update traffic data ($(date -u +%Y-%m-%d))"
+          git push

public/index.html

@@ -81,5 +81,7 @@
 		</noscript>
 		<div id="app"></div>
 		<!-- built files will be auto injected -->
+		<script data-goatcounter="https://peuqui.goatcounter.com/count"
+		        async src="//gc.zgo.at/count.js"></script>
 	</body>
 </html>