style: optimize gen2D deck layout, animations, and visual hierarchy

- style-keys.md: add v-clicks to 3x2 grid for staggered animation
- eino-graph.md: two-column layout (code left, Items right)
- eino-deep-dive.md: two-column layout for both slides, code+Items side-by-side
- async-deep-dive.md: two-column layout for both slides, SVG integrated
- harness.md: two-column layout for slide 1 (code left, Items right)
- request-journey.md: two-column layout for journey steps
- data-model.md: add v-clicks to grid items, increase diagram height
- architecture/pipeline/prompt-agent: increase SVG max-height for better visibility

decks/gen2D/pages/harness.md

@@ -2,15 +2,9 @@
 
 多层一致性确保输出可控
 
-<v-clicks>
+<div class="grid grid-cols-2 gap-4 mt-2">
 
-<Item title="风格一致性 — 合并策略">
-Project Style（基底）+ Task Override（覆盖）→ `mergeStyle()` 逐键合并。工程风格定义全局基调，任务风格按需微调，互不干扰。
-</Item>
-
-</v-clicks>
-
-<div class="mt-2">
+<div>
 
 ```go
 func mergeStyle(projectStyle, taskStyle map[string]string) map[string]string {
@@ -23,8 +17,14 @@ func mergeStyle(projectStyle, taskStyle map[string]string) map[string]string {
 
 </div>
 
+<div class="flex flex-col justify-center">
+
 <v-clicks>
 
+<Item title="风格一致性 — 合并策略">
+Project Style（基底）+ Task Override（覆盖）→ `mergeStyle()` 逐键合并。工程风格定义全局基调，任务风格按需微调，互不干扰。
+</Item>
+
 <Item title="管线一致性 — Eino Graph 保证">
 Graph 强制拓扑顺序执行，State 每次调用独立生成。节点无状态，数据经 State 中转，避免并发污染。
 </Item>
@@ -35,6 +35,10 @@ QualitySupervisor 自动质检，不合格重试（最多 3 次），超限降
 
 </v-clicks>
 
+</div>
+
+</div>
+
 ---
 
 # 一致性保障 — 数据与部署