feat: AI recipes for custom meeting prompt templates

[StevenLi-phoenix]

Summary

• AIRecipe model — reusable prompt template with name, icon (SF Symbol), promptTemplate (supports {{transcript}}, {{title}}, {{duration}}, {{date}}), output sections, summary style, built-in flag
• RecipeStore — nonisolated enum with JSON file storage in Application Support; 6 built-in recipes (General Meeting, Sprint Retro, 1-on-1, Sales Call, Brainstorm, Product Review) with stable UUIDs; built-ins always restored on load; duplicate/delete support
• PromptBuilder.buildRecipePrompt() — interpolates recipe template, adds section hints and style/constraint instructions
• SummarizerService.summarizeWithRecipe() — recipe-based regeneration with retry logic
• Recipe picker in SummaryCardView — Menu button in hover overlay alongside existing regenerate/edit/copy buttons; onRegenerateWithRecipe callback wired through SessionDetailView
• RecipeListView + RecipeEditorView — new Settings > Recipes tab for CRUD management; HSplitView with sidebar list and detail editor; built-in recipes are read-only with duplicate option
• 19 unit tests — built-in count/properties, template interpolation (all vars, missing vars, empty, multiple occurrences), JSON round-trip, load/save with temp files, delete protection, duplicate, Hashable conformance

Closes #20

Test plan

• Build succeeds (CODE_SIGNING_ALLOWED=NO)
• 19 RecipeStoreTests pass
• Manual: open Settings > Recipes tab, verify 6 built-in recipes shown
• Manual: create custom recipe, verify it persists across app restart
• Manual: duplicate a built-in recipe, edit the copy
• Manual: hover summary > click recipe menu > select recipe > verify recipe-specific regeneration
• Manual: verify existing regenerate-with-instructions flow still works

🤖 Generated with Claude Code

[claude]

✅ Claude Code Review: APPROVE

AI Recipes feature is well-structured, follows project conventions (nonisolated enum, OS logging, DS design tokens, re-fetch after await), and includes 19 unit tests with solid coverage of interpolation, CRUD, and JSON round-tripping.

[github-actions]

⏸️ Auto-merge paused: 5 unchecked checkbox(es) in PR body. Merge will proceed automatically once all tasks are checked and a new push triggers the workflow.

[StevenLi-phoenix]

Notes — AI Recipes (#20)

很好的功能！几点建议：

1. 与 Granola "Recipes" 的差异化

Granola 的 Recipes 是他们最受欢迎的功能——结合会议上下文 + 专家 AI prompt 模板（如 coaching、brief-writing）。我们的 AI Recipes 可以进一步差异化：

• 本地化模板：内置中英文会议模板（周会、brainstorm、1-on-1、面试）
• 变量插值：模板中支持 {{session_duration}}、{{speaker_count}}、{{date}} 等变量
• 社区共享：导出/导入 recipe JSON，用户之间分享最佳实践

2. 与 Structured Output 集成

Recipe 可以指定期望的输出结构（而不仅仅是 prompt 文本）。例如：

• "周会 Recipe" 输出固定结构：决策 / 待办 / 风险 / 下次议题
• 配合 feat: @Generable structured summary output (#44) #59 的 @Generable / JSON Schema，recipe 同时携带 prompt + schema

3. 预设 Recipes 建议

首次使用时提供 5-8 个预设 recipe，降低使用门槛：

• 📋 会议纪要（中/英）
• ✅ Action Items 提取
• 🎯 决策追踪
• 📊 Weekly Summary
• 🧠 Brainstorm 整理
• 💼 面试评估