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/data-model.md

@@ -3,20 +3,20 @@
 四表结构，清晰的实体关系
 
 <div class="flex justify-center">
-  <img src="../public/data-model.svg" class="w-full max-h-[250px] object-contain" />
+  <img src="../public/data-model.svg" class="w-full max-h-[220px] object-contain" />
 </div>
 
 <div class="grid grid-cols-2 gap-4 mt-2">
 
 <Item title="👤 USER + PROJECT">
-- 用户：`id`(base62)、`username`、`password_hash`(bcrypt)
-- 工程：`id`、`user_id`、`name`、`description`
+用户：`id`(base62)、`username`、`password_hash`(bcrypt)
+工程：`id`、`user_id`、`name`
 </Item>
 
 <Item title="🎨 STYLE + TASK + ASSET">
-- 风格表：`project_id` 一对一，`kv_pairs` JSON 存储
-- 任务：`prompt`、`status`、`style_override`
-- 素材：`file_url`、`metadata`，存于七牛云 Kodo
+风格表：`project_id` 一对一，`kv_pairs` JSON
+任务：`prompt`、`status`、`progress`
+素材：`file_url`、`metadata`
 </Item>
 
 </div>