feat: 支持多语言提示词本地化和界面优化

- 添加 prompt_locale 参数支持简体中文、繁体中文和英文提示词本地化
- 移除内置 agents 配置以简化系统架构
- 更新 ContextBuilder 使用动态提示词模板而非硬编码内容
- 在 AgentLoop、Web 接口和 AgentService 中传递 locale 参数
- 添加输出语言指令确保用户界面内容按指定语言生成
- 扩展前端 LanguageSwitcher 组件支持三种语言选项
- 优化 Header 和侧边栏组件的响应式布局和文本截断处理
- 更新测试用例验证不同语言环境下的提示词正确性

docs/superpowers/plans/2026-06-08-skill-replay-eval.md

@@ -2,6 +2,12 @@
 
 > **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
 
+Related product planning artifacts:
+
+- [Product Discovery Report](../../product-discovery/skill-replay-eval/product-discovery-report.md)
+- [PRD](../../product-discovery/skill-replay-eval/PRD-skill-replay-eval.md)
+- [Launch And Maintenance Runbook](../../product-discovery/skill-replay-eval/launch-maintenance-runbook.md)
+
 **Goal:** Replace heuristic-only skill draft evaluation with replay-style reports that cover all tools through either safe execution or LLM surrogate judgment, while preserving base skill content during draft synthesis.
 
 **Architecture:** Extend the existing skill learning pipeline instead of replacing it. Add replay report fields to `SkillDraftEvalReport`, introduce focused helper modules under `beaver/skills/learning/`, then wire the enhanced evaluator through the existing `SkillLearningPipelineService.evaluate_draft()` path and Skills UI.

docs/superpowers/specs/2026-06-08-skill-replay-eval-design.md

@@ -1,5 +1,11 @@
 # Skill Replay Eval Design
 
+Related product planning artifacts:
+
+- [Product Discovery Report](../../product-discovery/skill-replay-eval/product-discovery-report.md)
+- [PRD](../../product-discovery/skill-replay-eval/PRD-skill-replay-eval.md)
+- [Launch And Maintenance Runbook](../../product-discovery/skill-replay-eval/launch-maintenance-runbook.md)
+
 ## Goal
 
 Improve skill draft evaluation so it measures real task behavior instead of relying on heuristic draft scoring. The new evaluation must cover every tool involved in a skill, while separating tools that can be executed safely from tools that require LLM surrogate judgment.