diff --git a/.github/workflows/sync-flasher-content.yml b/.github/workflows/sync-flasher-content.yml
index 93ef1b34..7c4c409d 100644
--- a/.github/workflows/sync-flasher-content.yml
+++ b/.github/workflows/sync-flasher-content.yml
@@ -19,6 +19,9 @@ on:
       - '**.md'
       - 'docs/**'
       - 'scripts/gen_changelog.py'
+      # /webconfig frames the real portal page against a browser simulator, so
+      # the page itself is a synced doc asset like the .md files above.
+      - 'webui/index.html'
 
 # Own group: serialize doc syncs against each other only. Deliberately NOT shared
 # with build-observer-firmwares.yml — a shared group let one workflow cancel the
@@ -59,6 +62,21 @@ jobs:
             fi
           done
 
+      - name: Sync the WebConfig Portal Page into Flasher
+        run: |
+          # flasher/webconfig.html embeds the REAL portal page in a device
+          # surround and runs it against lib/webconfig-sim.js, which intercepts
+          # fetch() so no device is needed. Syncing the page is what keeps that
+          # demo honest — the alternative is screenshots, which go stale without
+          # anyone noticing. The build script only injects a <script> tag; it
+          # refuses a page that already carries the simulator.
+          if [ -f webui/index.html ]; then
+            python3 flasher/scripts/build-webconfig-demo.py webui/index.html
+            echo "rebuilt flasher/webconfig-demo.html from webui/index.html"
+          else
+            echo "WARNING: webui/index.html not found; leaving the demo as-is" >&2
+          fi
+
       - name: Generate Changelog
         run: |
           # Append-only and idempotent; preserves the hand-curated history and