Phase 2: Dashboard frontend with public metrics and community tabs

.github/workflows/deploy-dashboard.yml

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+name: Deploy Dashboard to Cloudflare Pages
+
+on:
+  push:
+    branches:
+      - main
+      - develop
+    paths:
+      - 'dashboard/**'
+      - '.github/workflows/deploy-dashboard.yml'
+  pull_request:
+    types: [opened, synchronize, reopened]
+    paths:
+      - 'dashboard/**'
+      - '.github/workflows/deploy-dashboard.yml'
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      deployments: write
+      pull-requests: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Get branch name
+        id: branch
+        run: |
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            BRANCH_NAME="${{ github.head_ref }}"
+          else
+            BRANCH_NAME="${{ github.ref_name }}"
+          fi
+          # Sanitize branch name for URL (replace / with -, lowercase)
+          SANITIZED=$(echo "$BRANCH_NAME" | tr '/' '-' | tr '[:upper:]' '[:lower:]')
+          # Cloudflare Pages truncates branch names to ~28 chars for preview URLs
+          TRUNCATED=$(echo "$SANITIZED" | cut -c1-28)
+          echo "name=$TRUNCATED" >> $GITHUB_OUTPUT
+          echo "original=$BRANCH_NAME" >> $GITHUB_OUTPUT
+
+      - name: Deploy to Cloudflare Pages
+        id: deploy
+        uses: cloudflare/wrangler-action@v3
+        with:
+          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          # Deploy with branch name so Cloudflare Pages routes correctly:
+          # - main branch -> osa-dash.pages.dev (production)
+          # - develop branch -> develop.osa-dash.pages.dev (preview)
+          # - PR branches -> {branch}.osa-dash.pages.dev (preview)
+          command: pages deploy dashboard --project-name=osa-dash --branch=${{ steps.branch.outputs.name }}
+
+      - name: Comment on PR with preview URL
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const branch = '${{ steps.branch.outputs.name }}';
+            const previewUrl = `https://${branch}.osa-dash.pages.dev`;
+
+            // Find existing comment from this workflow
+            const { data: comments } = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+            });
+
+            const botComment = comments.find(comment =>
+              comment.user.type === 'Bot' &&
+              comment.body.includes('<!-- cloudflare-dashboard-preview -->')
+            );
+
+            const sha = '${{ github.sha }}'.substring(0, 7);
+            const body = [
+              '<!-- cloudflare-dashboard-preview -->',
+              '## Dashboard Preview',
+              '',
+              '| Name | Link |',
+              '|------|------|',
+              `| **Preview URL** | ${previewUrl} |`,
+              '| **Branch** | \`${{ steps.branch.outputs.original }}\` |',
+              `| **Commit** | \`${sha}\` |`,
+              '',
+              'This preview will be updated automatically when you push new commits.'
+            ].join('\n');
+
+            if (botComment) {
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: body
+              });
+            } else {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: body
+              });
+            }

dashboard/_redirects

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+/*  /index.html  200