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/src/main.rs

@@ -12,8 +12,8 @@ use hemx_axum::{
 };
 use hemx_host::{
     browser_pwa_host_profile, native_shell_host_profile, Capability, CapabilityManifest,
-    CapabilityShape, CapabilityUse, HapticPattern, HostCall, HostCallId, HostEvent, SharePayload,
-    BROWSER_HOST_JS,
+    CapabilityShape, CapabilityUse, HapticPattern, HostCall, HostCallId, HostEvent,
+    SharePayload as HostShareData, BROWSER_HOST_JS,
 };
 use hemx_techdemo::ui;
 use hemx_techdemo::ui::control_center::{self as control, classes};
@@ -125,7 +125,7 @@ impl LocalJournal {
             LocalEvent::SetCompleted { set_id, reps } => {
                 self.projection.completed_sets += 1;
                 self.projection.summary = format!(
-                    "Projected set {set_id} with {reps} reps from commands/events; no DOM patch or EffectBatch was stored"
+                    "Projected set {set_id} with {reps} reps from commands/events; no DOM patch or UI update was stored"
                 );
             }
         }
@@ -459,7 +459,7 @@ fn native_manifest() -> CapabilityManifest {
 fn browser_share_call() -> HostCall {
     HostCall::Share {
         id: HostCallId::new("browser-share-1"),
-        payload: SharePayload::text("hemx host capability demo"),
+        payload: HostShareData::text("hemx host capability demo"),
     }
 }
 
@@ -861,7 +861,7 @@ fn host_panel(demo: &DemoState) -> HostPanel {
     // req: host/001 req: host/002 req: host/005
     HostPanel {
         status: demo.host_status.clone(),
-        boundary: "HostCall → HostEvent → app command → EffectBatch",
+        boundary: "HostCall → HostEvent → app command → UI update",
     }
 }
 
@@ -875,7 +875,7 @@ fn local_panel(demo: &DemoState) -> LocalPanel {
     LocalPanel {
         status: demo.local_journal.status(),
         projection: demo.local_journal.projection.summary.clone(),
-        boundary: "LocalCommand → LocalEvent → Projection → EffectBatch",
+        boundary: "LocalCommand → LocalEvent → Projection → UI update",
     }
 }