fix: trim gen2D slide content to prevent overflow beyond header/footer

- Reduce Item count per slide: pipeline 4→3, solution 4→2, highlights 6→4
- Remove tech-stack architecture layering Item (moved to tech-stack grid)
- Simplify eino-graph: shorter Go code, 3 Items→2
- Simplify prompt-agent: smaller mermaid, shorter Item text
- Simplify async-task: merge 3 Items→2, remove footer
- Simplify data-model: merge 4 grid items→2
- Simplify architecture: reduce ASCII diagram from 38 to 20 lines
- Simplify dedup-ws: remove JSON code block, shorter Items
- Simplify deployment: smaller mermaid, shorter Items
- Simplify problem: shorter Item text, remove bullet lists
- Simplify style-system: fix typo, shorter Item text

decks/gen2D/pages/eino-graph.md

@@ -1,27 +1,19 @@
 # Eino 管线编排 — compose.Graph
 
-四阶段智能体协作的核心实现
-
 <div class="mt-2">
 
-```go {all|1-8|10-15|17-22|24-28}
-// 类型定义
+```go
 type PipelineInput struct {
-    UserID     string
-    ProjectID  string
-    TaskID     string
-    Prompt     string
-    AssetType  string
-    StyleMap   map[string]string
+    UserID, ProjectID, TaskID string
+    Prompt, AssetType         string
+    StyleMap                  map[string]string
 }
-
 type PipelineState struct {
     OptimizedPrompt string
     ImageURL        string
     QualityPassed   bool
     RetryCount      int
 }
-
 type PipelineOutput struct {
     AssetURL string
     Metadata map[string]any
@@ -30,18 +22,10 @@ type PipelineOutput struct {
 
 </div>
 
-<v-clicks>
-
 <Item title="graph.Build() — 构建管线">
-使用 `compose.NewGraph[PipelineInput, PipelineOutput]()` 创建有向图，依次注册四个节点：PromptOptimizer → AssetGenerator → QualitySupervisor → FormatAdapter。质检节点支持条件分支：通过则进入格式适配，不通过则回退到提示词优化。
-</Item>
-
-<Item title="stateHandler — 状态管理">
-通过 `AddLambda` 注册状态处理器，在节点间传递优化后的提示词、图片 URL、重试计数等状态。质检节点根据 `RetryCount` 决定重优化还是降级输出。
+`compose.NewGraph` 创建有向图，注册四节点。质检节点条件分支：通过 → 格式适配，不通过 → 回退提示词优化。
 </Item>
 
 <Item title="graph.Invoke() — 执行管线">
-传入 `PipelineInput`，管线自动按拓扑顺序执行各节点。每个节点执行完成后通过回调更新进度（5% → 25% → 60% → 80% → 100%）。
+传入 `PipelineInput`，按拓扑顺序执行。每节点完成回调更新进度（5% → 25% → 60% → 80% → 100%）。
 </Item>
-
-</v-clicks>