chore: bump version to 0.2.14

[wgqqqqq]

Summary

• bump the BitFun product version from 0.2.13 to 0.2.14
• keep root, Web UI, mobile web, installer, Relay Server, Relay Service, and Page Function Runtime version metadata aligned
• update displayed fallback versions and the announcement request contract fixture

Verification

• pnpm run check:github-config
• pnpm run type-check:web
• pnpm --dir src/mobile-web run type-check
• pnpm --dir BitFun-Installer run type-check
• cargo metadata --no-deps --format-version 1
• cargo test -p bitfun-services-integrations --features announcement --test announcement_contracts announcement_remote_fetch_request_preserves_legacy_query_shape
• git diff --check

pnpm run check:repo-hygiene is blocked by the pre-existing untracked generate_intro_doc.cjs, which contains a local absolute path; that unrelated file is not included in this PR.