ci(web): add web-ci and web-deploy GitHub Actions workflows

web-ci.yml — runs on push/PR to master|dev that touches web/**:
- format:check (prettier --check)
- lint (eslint flat config)
- type-check (tsc --noEmit)
- bun run build (next build, sanity)
- bunx opennextjs-cloudflare build (Cloudflare worker bundle)

web-deploy.yml — runs on push to master that touches web/** OR manual
workflow_dispatch (with optional environment input):
- bun install --frozen-lockfile
- bun run prebuild + bunx opennextjs-cloudflare build
- cloudflare/wrangler-action@v3 deploy with CLOUDFLARE_API_TOKEN +
  CLOUDFLARE_ACCOUNT_ID secrets, scoped to working-directory: web

Both gated by paths-filter so plugin-only changes do not trigger them.
Concurrency group cancels in-progress CI runs but NOT in-progress deploys.
A web-production GitHub environment is referenced so deploys can be
gated behind required reviewers / wait timers if desired.

Verified locally end-to-end before push:
- bun install: 678 packages
- format:check: pass after `bun run format` reformatted 21 files
- lint: pass
- type-check: pass
- bun run build: pass (4 locales × pages built)
- bunx opennextjs-cloudflare build: pass (.open-next/worker.js generated)

.github/workflows/web-ci.yml

@@ -0,0 +1,52 @@
+name: Web CI
+
+on:
+  push:
+    branches: [master, dev]
+    paths:
+      - "web/**"
+      - ".github/workflows/web-ci.yml"
+  pull_request:
+    branches: [master, dev]
+    paths:
+      - "web/**"
+      - ".github/workflows/web-ci.yml"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  format-lint-typecheck-build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: web
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.12"
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Format check
+        run: bun run format:check
+
+      - name: Lint
+        run: bun run lint
+
+      - name: Type check
+        run: bun run type-check
+
+      - name: Next build
+        run: bun run build
+        env:
+          NEXT_TELEMETRY_DISABLED: "1"
+
+      - name: OpenNext (Cloudflare) build
+        run: bunx opennextjs-cloudflare build
+        env:
+          NEXT_TELEMETRY_DISABLED: "1"

.github/workflows/web-deploy.yml

@@ -0,0 +1,55 @@
+name: Web Deploy (Cloudflare Workers)
+
+on:
+  workflow_dispatch:
+    inputs:
+      environment:
+        description: "Wrangler environment (leave blank for default)"
+        required: false
+        default: ""
+  push:
+    branches: [master]
+    paths:
+      - "web/**"
+      - ".github/workflows/web-deploy.yml"
+
+concurrency:
+  group: web-deploy-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: web-production
+      url: https://ohmyopenagent.com
+    defaults:
+      run:
+        working-directory: web
+    permissions:
+      contents: read
+      deployments: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.12"
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Build with OpenNext for Cloudflare
+        run: |
+          bun run prebuild
+          bunx opennextjs-cloudflare build
+        env:
+          NEXT_TELEMETRY_DISABLED: "1"
+
+      - name: Deploy to Cloudflare Workers
+        uses: cloudflare/wrangler-action@v3
+        with:
+          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          workingDirectory: web
+          command: ${{ inputs.environment && format('deploy --env {0}', inputs.environment) || 'deploy' }}