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/solution.md

@@ -6,12 +6,20 @@
 
 <v-clicks>
 
-<Item title="🗣️ 自然语言驱动 + 🎨 风格一致">
-用文字描述素材需求，AI 自动生成。工程级风格预设保证同一项目素材风格统一。
+<Item title="🗣️ 自然语言驱动">
+用文字描述素材需求，AI 自动生成。降低创作门槛。
 </Item>
 
-<Item title="📦 管线友好 + ✅ 质量可控">
-标准尺寸输出，适配 Unity / Godot。自动质检 + 重试（最多 3 次）+ 降级兜底。
+<Item title="🎨 风格一致">
+工程级风格预设保证同一项目素材风格统一。
+</Item>
+
+<Item title="📦 管线友好">
+标准尺寸输出，适配 Unity / Godot。
+</Item>
+
+<Item title="✅ 质量可控">
+自动质检 + 重试（最多 3 次）+ 降级兜底。
 </Item>
 
 </v-clicks>