Update fetch for static page gen, fix DOM patching

go/cmd/examples/go-wasm-web/README.md

@@ -27,8 +27,11 @@ answers `/api/quotes` with `httputil.RespondGob([]Quote)` and the client decodes
 it straight back into `[]Quote` with `httputil.FetchGob` (the same Go type on
 both ends — no JSON); and a **user-entered** GitHub repo (`owner/name`) is
 fetched with `httputil.FetchJSON` into a tagged Go struct. The client HTTP
-transport is `wasmruntime.FetchBytes`, injected once via
-`httputil.SetClientTransport`.
+transport is `wasmruntime.FetchBytes`, installed by the runtime itself (override
+it with `httputil.SetClientTransport` for auth headers or a base URL). `/data` is
+a `static` route, and fetching only exists on the client, so the fetches no-op
+during SSR: the server pre-renders the page's **spinner**, and the client runs
+them for real after hydration.
 
 Styling is **Tailwind**: the dev server (and `build.sh`) run `kjol/cmd/twcss`,
 which scans the Go markup + the `webui` kit for utility classes and compiles

go/cmd/examples/go-wasm-web/app/data.go

@@ -25,7 +25,7 @@ type repoInfo struct {
 	Stars       int    `json:"stargazers_count"`
 }
 
-//gowasm:page /data layout=app
+//gowasm:page /data layout=app static
 func DataPage(d Deps) func() *VNode {
 	// (1) gob from our own server via httputil.RespondGob / FetchGob.
 	quotes := NewSignal([]Quote{})

go/cmd/examples/go-wasm-web/app/routes.gen.go

@@ -20,6 +20,7 @@ var StaticPaths = map[string]bool{
 	"/":      true,
 	"/about": true,
 	"/chart": true,
+	"/data":  true,
 }
 
 // RouteLayout maps each route to the name of the layout that wraps it.

go/cmd/examples/go-wasm-web/wasm/main.go

@@ -6,17 +6,19 @@ package main
 
 import (
 	"gowasmweb/app"
-	"kjol/httputil"
 	"kjol/vdom"
 	"kjol/wasmruntime"
 )
 
 func main() {
+	// (The client transport for httputil.FetchGob / FetchJSON needs no wiring —
+	// importing wasmruntime installs it. On the server it stays nil, so those
+	// fetches no-op during SSR and the page ships its loading state.)
+	//
 	// Collect the signals created during setup so their values can be preserved
 	// across an in-place hot swap. On a normal load RestoreState is nil (fresh
 	// state); after a dev hot-reload it carries the previous instance's values,
 	// which NewSignal restores by creation order.
-	httputil.SetClientTransport(wasmruntime.FetchBytes) // typed gob/json fetches for app pages
 	collector := vdom.BeginCollect(wasmruntime.RestoreState())
 	router := wasmruntime.NewRouter()
 	deps := app.Deps{Path: router.Path, Navigate: router.Navigate}