chore: optimize word and home extend link

[gimmyhehe]

概述

• 将 Playground 模型配置中的「提示词」文案改为「追加提示词」，更准确地表达其作为附加提示词拼接在主提示词之后的语义；同时将 i18n key 由 model.prompt 重命名为 model.additionalPrompt（中英同步）。
• 修复首页扩展区「体验搭建」入口的跳转链接，由 LinkKey.PlaygroundBuilder 改为 LinkKey.Playground，确保携带 inputMessage 后跳转到正确的 Playground 页面。

Summary by CodeRabbit

• Bug Fixes
  • Updated the homepage Playground link to use the correct destination while preserving existing parameters.
  • Clarified the model configuration label from “Prompts” to “Additional prompts.”
• Localization
  • Updated English and Chinese translations for the revised model configuration label.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: c82be78e-daaf-4882-a6fa-4dd66a4c7329

📥 Commits

Reviewing files that changed from the base of the PR and between 27f3b86 and 8bc50f9.

📒 Files selected for processing (4)

• sites/homepage/web/src/components/HomeExtend.vue
• sites/playground/web/src/components/tab-components/ModelConfig.vue
• sites/playground/web/src/i18n/en.json
• sites/playground/web/src/i18n/zh.json

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

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Walkthrough

The homepage header now links to the Playground route. The model configuration prompt section now uses the additionalPrompt localization key with updated English and Chinese labels.

Changes

Playground prompt labels

Layer / File(s)	Summary
Additional prompt label sites/playground/web/src/i18n/en.json, sites/playground/web/src/i18n/zh.json, sites/playground/web/src/components/tab-components/ModelConfig.vue	The model configuration uses model.additionalPrompt. English displays “Additional prompts”. Chinese displays “追加提示词”.

Homepage Playground routing

Layer / File(s)	Summary
Playground link target sites/homepage/web/src/components/HomeExtend.vue	The header link uses LinkKey.Playground and preserves the inputMessage query parameter.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 8bc50

This PR makes localized wording and homepage navigation updates, with no actionable merge-blocking risk remaining beyond normal checks and review.

Suggested reviewers: lhuans, gargameljyh, yy-wow

Poem

A rabbit hops through links so bright,
The Playground route is now in sight.
“Additional prompts,” labels say,
In English and Chinese today.
Tiny changes, neat and right!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (4 skipped: 4 unsupported.)
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the wording updates and the homepage extension link change.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch optimize-link-and-word

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