fix: keep dashboard shell dimensions stable

surfaces/shell/src/browser/ModuleUiFrame.tsx

@@ -116,7 +116,10 @@ export function ModuleUiFrame(props: ModuleUiFrameProps): ReactElement {
   }, [config, descriptor, importModule, onAuthorizationResponse, principal]);
 
   return (
-    <section aria-live="polite" style={{ display: "grid", gap: "0.75rem" }}>
+    <section
+      aria-live="polite"
+      style={{ display: "grid", gap: "0.75rem", minWidth: 0, width: "100%" }}
+    >
       {status === "loading" ? (
         <p data-testid="module-loading" style={{ color: "#57534e", margin: 0 }}>
           Loading module…
@@ -128,7 +131,7 @@ export function ModuleUiFrame(props: ModuleUiFrameProps): ReactElement {
           to check the installation.
         </p>
       ) : undefined}
-      <div data-testid="module-container" ref={containerRef} />
+      <div data-testid="module-container" ref={containerRef} style={{ minWidth: 0, width: "100%" }} />
     </section>
   );
 }