feat: add dashboard source code with Vite + React + Recharts and CI/CD build

- Reconstruct dashboard from compiled container: App.jsx, main.jsx, index.css
- nginx.conf with SPA routing and /api proxy to api:8000
- Multi-stage Dockerfile: node:20-alpine build + nginx:alpine serve
- Add third kaniko build step in ci.yml for chemavx/polymarket-bot-dashboard
- Update k8s manifest sed to patch deployment-dashboard.yaml image on each push

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

.gitea/workflows/ci.yml

@@ -47,6 +47,18 @@ jobs:
           build_file: Dockerfile.api
           extra_args: --insecure --skip-tls-verify
 
+      - name: Build and push dashboard image
+        uses: aevea/action-kaniko@master
+        with:
+          registry: git.chemavx.xyz
+          username: chemavx
+          password: ${{ secrets.CI_TOKEN }}
+          image: chemavx/polymarket-bot-dashboard
+          tag: ${{ steps.tag.outputs.TAG }}
+          path: dashboard
+          build_file: Dockerfile
+          extra_args: --insecure --skip-tls-verify
+
       - name: Update k8s manifests
         run: |
           TAG=${{ steps.tag.outputs.TAG }}
@@ -61,10 +73,13 @@ jobs:
             polymarket-bot/deployment-bot.yaml
           sed -i "s|image: .*polymarket-bot-api.*|image: git.chemavx.xyz/chemavx/polymarket-bot-api:${TAG}|g" \
             polymarket-bot/deployment-api.yaml
+          sed -i "s|image: .*polymarket-bot-dashboard.*|image: git.chemavx.xyz/chemavx/polymarket-bot-dashboard:${TAG}|g" \
+            polymarket-bot/deployment-dashboard.yaml
           sed -i "s|imagePullPolicy: Never|imagePullPolicy: Always|g" \
             polymarket-bot/deployment-bot.yaml \
-            polymarket-bot/deployment-api.yaml
+            polymarket-bot/deployment-api.yaml \
+            polymarket-bot/deployment-dashboard.yaml
 
-          git add polymarket-bot/deployment-bot.yaml polymarket-bot/deployment-api.yaml
+          git add polymarket-bot/deployment-bot.yaml polymarket-bot/deployment-api.yaml polymarket-bot/deployment-dashboard.yaml
           git diff --cached --quiet || git commit -m "ci: update polymarket-bot images to ${TAG} [skip ci]"
           git push