feat: SPA routing, projects/resume sections, deployment infra

- Add client-side router with History API pushState (router.ts, pages.ts)
- Extend overlay with projects grid/category/detail views and resume section
- Add Gitea CI/CD workflow and webhook deployment server
- Improve Docker Compose with nginx reverse proxy config
- Add deployment script and .env.example

.gitea/workflows/deploy.yml

@@ -0,0 +1,53 @@
+# Gitea Actions workflow — build, test, deploy
+# Shows deployment status on the repo page, Actions tab, and commits.
+name: Build & Deploy
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  # ---- Job 1: Typecheck & Build ----
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      # Vite build is done inside Docker, so this is just a fast sanity check.
+      # Full build + test happens in the Docker multi-stage build below.
+
+  # ---- Job 2: Docker build + deploy ----
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build Docker image (includes npm test gate)
+        run: docker compose build
+
+      - name: Deploy via docker compose
+        run: |
+          docker compose up -d --remove-orphans
+          sleep 3
+          docker compose ps
+
+      - name: Smoke test
+        run: |
+          curl -sf --retry 5 --retry-delay 2 http://localhost:80/ && echo "OK — site is live"