refactor(stage-*): analytics and telemetry, including consent (#1414)

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Co-authored-by-agent: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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Co-authored-by: RainbowBird <rbxin2003@outlook.com>
Co-authored-by: Neko <neko@ayaka.moe>

.github/workflows/deploy-cloudflare-workers.yml

@@ -78,6 +78,7 @@ jobs:
           S3_SECRET_ACCESS_KEY: ${{ secrets.S3_SECRET_ACCESS_KEY }}
           S3_ENDPOINT: ${{ secrets.S3_ENDPOINT }}
           S3_REGION: ${{ secrets.S3_REGION }}
+          VITE_ENABLE_POSTHOG: 'true'
           WARP_DRIVE_PUBLIC_BASE: ${{ secrets.WARP_DRIVE_PUBLIC_BASE }}
       - run: |
           CI=true pnpm install -g @posthog/cli