Problem

The home composer default placeholder (shown when no Skill is selected) is randomly picked from prompt.example.1 ~ prompt.example.25 (packages/app/src/i18n/{zh,en}.ts). The current pool is entirely developer-oriented: "修复代码库中的一个 TODO" / "这个项目的技术栈是什么？" / "生成 API 文档" / "把它转换成 TypeScript" / "这里的环境变量是怎么工作的？" etc. This conflicts with PawWork's non-technical knowledge worker positioning.

Expected

Replace or curate the rotation pool with non-technical workbench prompts, for example: 起草一封项目进度邮件 / 把这份 Excel 汇总成图表 / 整理 Downloads 里的发票 / 给客户写一份周报初稿 / 把这段会议录音整理成纪要 / 合并几份 PDF 并生成目录.

Scope

• Updates prompt.example.* keys in packages/app/src/i18n/{zh,en}.ts, or replaces the home placeholder source entirely.
• Affects only the home default placeholder (no Skill selected). Per-Skill placeholders landing in the [Feature] Redesign PawWork home task starter #151 first PR are separate.
• Conversation-state placeholders (session.tsx followup composer) are out of scope.

Non-goals

• Not a prompt engineering or model training effort.
• No changes to the Skill cards or home-to-session transition (those are [Feature] Redesign PawWork home task starter #151).