upgrade: adopt V8.32.0-dev.1 (theme preview iframe fix, editor simple mode)

Overlay 46 upstream items; full patch set re-applied (all patched files
reset by overlay regardless of upstream change status — lesson recorded).
Verified: theme suites 35/35; dual-baseline 418 passed vs pristine
389+29 ours, FAILED-set diff EMPTY (same 10 Windows env fails).
Live: container 8.32.0-dev.1 healthy, hesupipe 192 entries intact,
trade-pro build 203 pages 0 errors.

Co-Authored-By: Claude Code <noreply@anthropic.com>

compose.enterprise.yaml

@@ -6,7 +6,7 @@ services:
       dockerfile: Dockerfile.enterprise
       args:
         SITEFORGE_GIT_SHA: ${SITEFORGE_GIT_SHA:-unknown}
-    image: siteforge/web:8.31.0-dev.1
+    image: siteforge/web:8.32.0-dev.1
     init: true
     restart: unless-stopped
     ports:
@@ -48,7 +48,7 @@ services:
       retries: 3
       start_period: 30s
   worker:
-    image: siteforge/web:8.31.0-dev.1
+    image: siteforge/web:8.32.0-dev.1
     command: ['python','-m','app.worker']
     init: true
     restart: unless-stopped