Address PR #1219 code review feedback

- Filter undefined model hint names in SamplingRequestPanel, matching
  the pattern already used in InlineSamplingRequest
- Narrow ElicitationFormPanel to accept ElicitRequestFormParams instead
  of the full ElicitRequest['params'] union; removes the 'requestedSchema
  in request' guard and renders the schema unconditionally
- Add isUrlMode type guard in InlineElicitationRequest to properly
  narrow the URL variant; eliminates the 'as { url: string }' cast

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/groups/ElicitationFormPanel/ElicitationFormPanel.tsx

@@ -1,10 +1,10 @@
 import { Alert, Button, Divider, Group, Stack, Text } from "@mantine/core";
-import type { ElicitRequest } from "@modelcontextprotocol/sdk/types.js";
+import type { ElicitRequestFormParams } from "@modelcontextprotocol/sdk/types.js";
 import { SchemaForm } from "../SchemaForm/SchemaForm";
 import type { JsonSchema } from "../SchemaForm/SchemaForm";
 
 export interface ElicitationFormPanelProps {
-  request: ElicitRequest["params"];
+  request: ElicitRequestFormParams;
   serverName: string;
   values: Record<string, unknown>;
   onChange: (values: Record<string, unknown>) => void;
@@ -33,20 +33,15 @@ export function ElicitationFormPanel({
   onSubmit,
   onCancel,
 }: ElicitationFormPanelProps) {
-  const schema =
-    "requestedSchema" in request ? request.requestedSchema : undefined;
-
   return (
     <Stack gap="md">
       <QuotedMessage>{formatQuoted(request.message)}</QuotedMessage>
       <Divider />
-      {schema && (
-        <SchemaForm
-          schema={schema as JsonSchema}
-          values={values}
-          onChange={onChange}
-        />
-      )}
+      <SchemaForm
+        schema={request.requestedSchema as JsonSchema}
+        values={values}
+        onChange={onChange}
+      />
       <Alert color="yellow" title="Warning">
         {formatWarning(serverName)}
       </Alert>

clients/web/src/components/groups/InlineElicitationRequest/InlineElicitationRequest.tsx

@@ -8,7 +8,10 @@ import {
   Stack,
   Text,
 } from "@mantine/core";
-import type { ElicitRequest } from "@modelcontextprotocol/sdk/types.js";
+import type {
+  ElicitRequest,
+  ElicitRequestFormParams,
+} from "@modelcontextprotocol/sdk/types.js";
 import { SchemaForm } from "../SchemaForm/SchemaForm";
 import type { JsonSchema } from "../SchemaForm/SchemaForm";
 
@@ -49,12 +52,16 @@ const CompactButton = Button.withProps({
 
 function isFormMode(
   request: ElicitRequest["params"],
-): request is ElicitRequest["params"] & {
-  requestedSchema: Record<string, unknown>;
-} {
+): request is ElicitRequestFormParams {
   return "requestedSchema" in request;
 }
 
+function isUrlMode(
+  request: ElicitRequest["params"],
+): request is Extract<ElicitRequest["params"], { mode: "url" }> {
+  return "url" in request;
+}
+
 function getBadgeLabel(request: ElicitRequest["params"]): string {
   return isFormMode(request)
     ? "elicitation/create (form)"
@@ -70,8 +77,6 @@ export function InlineElicitationRequest({
   onSubmit,
   onCancel,
 }: InlineElicitationRequestProps) {
-  const formMode = isFormMode(request);
-
   return (
     <RequestContainer>
       <Stack gap="sm">
@@ -82,7 +87,7 @@ export function InlineElicitationRequest({
 
         <ItalicMessage>{request.message}</ItalicMessage>
 
-        {formMode && (
+        {isFormMode(request) && (
           <SchemaForm
             schema={request.requestedSchema as JsonSchema}
             values={values ?? {}}
@@ -90,9 +95,9 @@ export function InlineElicitationRequest({
           />
         )}
 
-        {!formMode && "url" in request && (
+        {isUrlMode(request) && (
           <>
-            <Code block>{(request as { url: string }).url}</Code>
+            <Code block>{request.url}</Code>
             {isWaiting && (
               <Group>
                 <Loader size="xs" />
@@ -104,7 +109,7 @@ export function InlineElicitationRequest({
 
         <ActionsRow>
           <CompactButton onClick={onCancel}>Cancel</CompactButton>
-          {formMode && (
+          {isFormMode(request) && (
             <Button size="xs" onClick={onSubmit}>
               Submit
             </Button>

clients/web/src/components/groups/SamplingRequestPanel/SamplingRequestPanel.tsx

@@ -72,7 +72,9 @@ export function SamplingRequestPanel({
     includeContext,
   } = request;
 
-  const hints = modelPreferences?.hints?.map((h) => h.name) ?? [];
+  const hints =
+    (modelPreferences?.hints?.map((h) => h.name).filter(Boolean) as string[]) ??
+    [];
 
   return (
     <Stack gap="md">