website refactor

docs/architecture/website/WEBSITE_DATA_FLOW.md

@@ -16,6 +16,7 @@ It renders truth from the API and forwards user intent to the API.
 
 ## 2) Read flow
 
+### Server Components (RSC)
 ```text
 RSC page.tsx
   ↓
@@ -25,19 +26,30 @@ API client (infra)
   ↓
 API Transport DTO
   ↓
-Page DTO
-  ↓
-Presenter (client)
-  ↓
-ViewModel (optional)
-  ↓
-Presenter (client)
+ViewData Builder (lib/builders/view-data/)
   ↓
 ViewData
   ↓
 Template
 ```
 
+### Client Components
+```text
+Client Component
+  ↓
+API client (useEffect)
+  ↓
+API Transport DTO
+  ↓
+ViewModel Builder (lib/builders/view-models/)
+  ↓
+ViewModel (lib/view-models/)
+  ↓
+Client State (useState)
+  ↓
+Template
+```
+
 ## 3) Write flow
 
 All writes enter through **Server Actions**.
@@ -60,6 +72,8 @@ RSC reload
 
 1. Templates accept ViewData only.
 2. Page Queries do not format.
-3. Presenters do not call the API.
-4. Client state is UI-only.
+3. ViewData Builders transform API DTO → ViewData (RSC).
+4. ViewModel Builders transform API DTO → ViewModel (Client).
+5. Builders do not call the API.
+6. Client state is UI-only.