fix: harden workspace manager drafts

frontend/src/shell/WorkspaceEditor.tsx

@@ -49,6 +49,8 @@ function validate(workspace: CanonicalWorkspace): FieldErrors {
   if (!workspace.dwh.supported_transports.length) errors["dwh.transport"] = "Choose at least one DWH transport";
   const dwhPort = positiveInteger(workspace.dwh.port, "DWH port", 65_535);
   if (dwhPort) errors["dwh.port"] = dwhPort;
+  const dwhTimeout = positiveInteger(workspace.dwh.timeout_ms, "DWH timeout");
+  if (dwhTimeout) errors["dwh.timeout"] = dwhTimeout;
   if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(workspace.semantic_index.vector_store.database)) errors["vector.database"] = "Use a database identifier";
   if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(workspace.semantic_index.vector_store.schema)) errors["vector.schema"] = "Use a schema identifier";
   if (!/^[A-Za-z_][A-Za-z0-9_]*$/.test(workspace.semantic_index.vector_store.collection)) errors["vector.collection"] = "Use a collection identifier";
@@ -175,7 +177,7 @@ export function WorkspaceEditor({ draft, onSaveDraft, onPublish: _onPublish, idL
         <Field label="DWH port" error={errors["dwh.port"]}>
           {({ id, describedBy, invalid }) => <input id={id} type="number" min="1" max="65535" aria-label="DWH port" aria-describedby={describedBy} aria-invalid={invalid} className={fieldClass} value={workspace.dwh.port ?? ""} onChange={(event) => update((value) => ({ ...value, dwh: { ...value.dwh, port: numberOrUndefined(event.target.value) } }))} />}
         </Field>
-        <Field label="DWH timeout (ms)">
+        <Field label="DWH timeout (ms)" error={errors["dwh.timeout"]}>
           {({ id, describedBy, invalid }) => <input id={id} type="number" min="1" aria-label="DWH timeout (ms)" aria-describedby={describedBy} aria-invalid={invalid} className={fieldClass} value={workspace.dwh.timeout_ms ?? ""} onChange={(event) => update((value) => ({ ...value, dwh: { ...value.dwh, timeout_ms: numberOrUndefined(event.target.value) } }))} />}
         </Field>
       </Section>