[codex] Clarify demo report entry copy

[YSCJRH]

Summary

• Refine the Pages examples entry so visitors see it as a product evaluation page, not a file-listing walkthrough.
• Make the report-reading order explicit in both English and Chinese: summary, scorecard, fixes.
• Keep the adoption path sequential: demo report, local sample, one public site, GitHub Action.

Validation

• git diff --check
• corepack pnpm build:site
• corepack pnpm seo:check
• node --experimental-strip-types --experimental-test-isolation=none --test scripts/distribution/build-site.test.ts
• corepack pnpm test
• corepack pnpm typecheck
• corepack pnpm demo:fixture
• corepack pnpm pack:cli:dry-run
• Browser review on http://127.0.0.1:4174/zh/examples/ and /en/examples/: key copy present once, no console errors.

Notes

• No scoring, review, download-count, or AI answer ranking claims added.
• Remote truth check before editing: latest release v0.3.2; activation/adoption umbrella issue Roadmap: activation and adoption hardening #33 remains open.