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f31dacac70
Guard the app bridge against stale-resource races. A resourceId switch or unmount while the iframe is still loading or bridge.connect() is pending now cancels the in-flight handleLoad, removes the load listener, and closes the orphaned bridge, so a single iframe can no longer end up with two bridges issuing duplicate sandbox and tool requests. Build the sandbox URL from apiBaseUrl() and let new URL() resolve it against the window origin. apiBaseUrl() already reflects an absolute or non-root base href, so the extra origin prefix produced a malformed URL that broke every app iframe. Emit a renderable ui:// marker only for HTML resources, since MCP Apps defines text/html;profile=mcp-app as the sole renderable type; json and remote-dom payloads fall through to plain resource text instead of a marker the host cannot render. Hide the iframe when an app sends request-teardown so a torn-down app no longer leaves a blank frame mounted. |
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