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/dedup-ws.md

@@ -2,6 +2,8 @@
 
 两项关键的工程优化
 
+<v-clicks>
+
 <Item title="🔍 请求去重（Request Dedup）">
 `hash(prompt + assetType + params)` 生成唯一键，`sync.Map` 内存缓存。相同参数并发请求自动合并，返回已有 `taskId`，节省 API 调用成本。
 </Item>
@@ -9,3 +11,5 @@
 <Item title="📡 WebSocket 实时推送">
 建立 `ws://host/api/v1/tasks/:taskId/ws` 连接，管线各阶段推送进度、质检重试信息、最终结果。同时兼容 HTTP 轮询方案。
 </Item>
+
+</v-clicks>