feat: expand gen2D deck with deep technical slides and interactive elements

- Add 5 new slide pages: eino-deep-dive, ratelimit-overview, ratelimit-lua, async-deep-dive, harness
- Add 4 new drawio SVGs: pipeline-detail, ratelimit, async-task, harness
- Update all existing slides with v-clicks progressive reveal
- Add presenter notes and interactive prompts
- Expand slides.md to register all new pages (16 → 25+ slides)
- Fix text overflow by trimming content per Item block
- Add Eino Graph deep dive: WithGenLocalState, Pre/Post Handler, branch routing
- Add rate limiting section: algorithm comparison, Lua script, Gin middleware
- Add async task deep dive: TaskQueue FIFO, context progress injection
- Add consistency section: style/pipeline/data/deployment 4-layer guarantees

decks/gen2D/pages/highlights.md

@@ -1,5 +1,7 @@
 # 核心亮点总结
 
+<v-clicks>
+
 <Item title="🤖 多智能体协作管线">
 Eino `compose.Graph` 编排四阶段智能体，支持质检重试（最多 3 次）与降级输出。
 </Item>
@@ -15,3 +17,5 @@ WebSocket 推送各阶段进度与质检信息。相同参数并发请求自动
 <Item title="🎨 风格系统 + 🚀 一键部署">
 两层风格架构（Project + Task Override）保证一致性。Docker Compose + Gitee CI/CD 零依赖部署。
 </Item>
+
+</v-clicks>