test(techdemo): add full product e2e coverage

req: examples/001

req: dx/008

req: form/002

req: page_swap/002

req: push/003

examples/techdemo/README.md

@@ -6,7 +6,7 @@ Run:
 
 Open <http://127.0.0.1:3002>.
 
-This demo is tailored to showcase slhx strengths:
+This is a polished Linear-style product demo for planning typed work across lanes. It is tailored to showcase slhx strengths:
 
 - modern SSR-first UI
 - generated resource modules from `.heml`
@@ -17,3 +17,8 @@ This demo is tailored to showcase slhx strengths:
 - page-enhancer navigation with native link fallback
 - SSE server push into a generated slot
 - no user-authored browser JavaScript
+
+Verification:
+
+    cargo test -p slhx-techdemo --test e2e
+    mutest -p slhx-techdemo -f examples/techdemo/src/main.rs -F 'registry' --test-package slhx-techdemo -j 2 --timeout 90