fix(utoopack): shorten production chunk and CSS filenames

[fireairforce]

Utoopack production client chunks and styles currently include generated names in their filenames. Use [contenthash:8].js for additional JavaScript chunks and [contenthash:8].css for both entry and async CSS, keeping asset names short by default.

JavaScript entries retain [name].[contenthash:8].js to distinguish pages. Development filenames remain stable. This change adds no public configuration fields; English and Chinese docs describe the defaults.

Validation:

• npm run check-types
• npm run lint
• npm test
• npm --workspace evjs-docs run build
• git diff --check
• Native Utoopack MPA build with two pages and dynamic JS/CSS imports: verified distinct page entries, five hash-only JS chunks, four hash-only CSS files, and valid HTML and lazy asset references.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-18T08:17:46.045228Z	ff3515c	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: ff3515cedc

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[chatgpt-codex-connector]

Include the fallback adapter in the configure context

When ev dev uses the normal CLI default—or a programmatic caller supplies only fallbackBundler—the selected adapter is passed through options.fallbackBundler, but this expression reports bundlerName as undefined. Consequently, presets branching on the newly exposed adapter name skip their adapter-specific development defaults even though the fallback adapter is subsequently activated; include the fallback name after the explicit option and configured adapter.

AGENTS.md reference: AGENTS.md:L60-L63

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