feat(flows): add update_scrum4me_web flow and UI page

- Update ops-agent/flows.example/update_scrum4me_web.yml with full
  deployment steps: git_status, git_fetch, git_log_ahead, git_pull,
  npm_ci, prisma_migrate_deploy, npm_run_build, systemctl_restart,
  and smoke test against thuis.jp-visser.nl/api/products
- Add npm_ci, prisma_migrate_deploy, npm_run_build, and
  curl_smoke_scrum4me_thuis to commands.yml.example
- Add /flows/update-scrum4me-web UI page with Run and Dry Run buttons,
  streaming terminal output, and link to audit log on completion

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

ops-agent/commands.yml.example

@@ -162,3 +162,27 @@ commands:
     cmd: ["docker", "compose", "ps", "--filter", "status=running", "worker-idea"]
     cwd: "/srv/scrum4me/compose"
     description: "Verify worker-idea container is in the running state"
+
+  # ── Scrum4Me web deployment steps ────────────────────────────────────────
+
+  npm_ci:
+    cmd: ["npm", "ci"]
+    cwd: "/srv/scrum4me/repos/Scrum4Me"
+    description: "Install production dependencies for Scrum4Me web (npm ci)"
+
+  prisma_migrate_deploy:
+    cmd: ["npx", "prisma", "migrate", "deploy"]
+    cwd: "/srv/scrum4me/repos/Scrum4Me"
+    description: "Apply pending Prisma migrations for Scrum4Me web"
+
+  npm_run_build:
+    cmd: ["npm", "run", "build"]
+    cwd: "/srv/scrum4me/repos/Scrum4Me"
+    description: "Build the Scrum4Me web application (next build)"
+
+  curl_smoke_scrum4me_thuis:
+    cmd:
+      - sh
+      - -c
+      - "code=$(curl -s -o /dev/null -w '%{http_code}' --max-time 15 https://thuis.jp-visser.nl/api/products); echo \"HTTP $code\"; [ \"$code\" = \"200\" ] || [ \"$code\" = \"401\" ]"
+    description: "Smoke test: /api/products must return 200 or 401"