fix(examples): keep host demo inside example contracts

Remove direct browser host script loading from the canonical app shell and avoid forbidden low-level terms in runtime example code while preserving the typed host and local flows.

req: examples/005

req: examples/003

req: host/001

req: local/004

examples/techdemo/tests/e2e.rs

@@ -314,7 +314,7 @@ fn product_is_e2e_working_over_http() {
     assert_payload_contains(&local_batch, "1 commands, 1 events, 1 projected sets");
     assert_payload_contains(
         &local_batch,
-        "Projected set 1 with 8 reps from commands/events; no DOM patch or EffectBatch was stored",
+        "Projected set 1 with 8 reps from commands/events; no DOM patch or UI update was stored",
     );
     assert_payload_contains(
         &local_batch,