Website: SEO pass + Lighthouse CI gate

.github/workflows/lighthouse.yml

@@ -0,0 +1,34 @@
+name: Lighthouse (website)
+
+on:
+  pull_request:
+    paths:
+      - 'website/**'
+      - '.github/workflows/lighthouse.yml'
+  push:
+    branches: [main]
+    paths:
+      - 'website/**'
+  workflow_dispatch:
+
+concurrency:
+  group: lighthouse-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lighthouse:
+    name: Lighthouse CI
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node 22
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Run Lighthouse CI
+        uses: treosh/lighthouse-ci-action@v12
+        with:
+          configPath: ./website/lighthouserc.json
+          temporaryPublicStorage: true

.gitignore

@@ -26,3 +26,6 @@ node_modules/
 # and agent worktrees. afca53e removed the loop file from tracking once already.
 .claude/ralph-loop.local.md
 .claude/worktrees/
+
+# Lighthouse CI local reports
+.lighthouseci/

website/assets/ocr/app-history.json

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website/assets/ocr/app-vite.json

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