Phase 2: Refactor Resources cluster to MCP SDK types

Replace ad hoc local types with MCP SDK schema types across the Resources
group components and ResourcesScreen, per the v2 UX interfaces plan.

- ResourceListItem: accept `resource: Resource | ResourceTemplate` instead
  of flat `name`/`uri`; render `title ?? name`; delete local
  `ResourceAnnotations` type
- ResourceControls: accept `Resource[]`, `ResourceTemplate[]`,
  `InspectorResourceSubscription[]` + `selectedUri`/`selectedTemplate`
  instead of `ResourceItem[]`/`TemplateListItem[]`/`SubscriptionItem[]`;
  no-op on re-selecting
- ResourcePreviewPanel: accept `resource: Resource` +
  `contents: (TextResourceContents | BlobResourceContents)[]` instead of
  flat `content: string`; use SDK `Annotations` (audience as Role[]);
  `lastUpdated` as `Date` not `string`
- ResourceTemplatePanel: accept `template: ResourceTemplate` instead of
  flat props; use SDK `Annotations`
- ResourceSubscribedItem: accept `subscription: InspectorResourceSubscription`
  instead of flat `name`/`lastUpdated`; `lastUpdated` as `Date`
- ResourcesScreen: accept `Resource[]`, `ResourceTemplate[]`,
  `InspectorResourceSubscription[]` + `selectedResourceUri`/
  `selectedTemplateUri` + `ReadResourceState`; derive selections via
  `find()`; add loading/error states
- Delete local `ResourceItem`, `TemplateListItem`, `SubscriptionItem`,
  `SelectedResource`, `SelectedTemplate`, `ResourceAnnotations` types
- Update all stories with real SDK fixtures
- Update ConnectedView ResourcesActive story

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

clients/web/src/components/groups/ResourcePreviewPanel/ResourcePreviewPanel.stories.tsx

@@ -17,57 +17,96 @@ type Story = StoryObj<typeof ResourcePreviewPanel>;
 
 export const JsonResource: Story = {
   args: {
-    uri: "file:///config.json",
-    mimeType: "application/json",
-    content: JSON.stringify(
-      { name: "mcp-inspector", version: "2.0.0", debug: true },
-      null,
-      2,
-    ),
+    resource: {
+      name: "config.json",
+      uri: "file:///config.json",
+    },
+    contents: [
+      {
+        uri: "file:///config.json",
+        mimeType: "application/json",
+        text: JSON.stringify(
+          { name: "mcp-inspector", version: "2.0.0", debug: true },
+          null,
+          2,
+        ),
+      },
+    ],
     isSubscribed: false,
-    lastUpdated: "2026-03-17T10:30:00Z",
+    lastUpdated: new Date("2026-03-17T10:30:00Z"),
   },
 };
 
 export const TextResource: Story = {
   args: {
-    uri: "file:///readme.txt",
-    mimeType: "text/plain",
-    content:
-      "This is a plain text resource with some example content.\nLine two of the content.",
+    resource: {
+      name: "readme.txt",
+      uri: "file:///readme.txt",
+    },
+    contents: [
+      {
+        uri: "file:///readme.txt",
+        mimeType: "text/plain",
+        text: "This is a plain text resource with some example content.\nLine two of the content.",
+      },
+    ],
     isSubscribed: false,
   },
 };
 
 export const Subscribed: Story = {
   args: {
-    uri: "file:///data.json",
-    mimeType: "application/json",
-    content: JSON.stringify({ status: "active" }, null, 2),
+    resource: {
+      name: "data.json",
+      uri: "file:///data.json",
+    },
+    contents: [
+      {
+        uri: "file:///data.json",
+        mimeType: "application/json",
+        text: JSON.stringify({ status: "active" }, null, 2),
+      },
+    ],
     isSubscribed: true,
-    lastUpdated: "2026-03-17T12:00:00Z",
+    lastUpdated: new Date("2026-03-17T12:00:00Z"),
   },
 };
 
 export const NotSubscribed: Story = {
   args: {
-    uri: "file:///data.json",
-    mimeType: "application/json",
-    content: JSON.stringify({ status: "active" }, null, 2),
+    resource: {
+      name: "data.json",
+      uri: "file:///data.json",
+    },
+    contents: [
+      {
+        uri: "file:///data.json",
+        mimeType: "application/json",
+        text: JSON.stringify({ status: "active" }, null, 2),
+      },
+    ],
     isSubscribed: false,
   },
 };
 
 export const WithAnnotations: Story = {
   args: {
-    uri: "file:///settings.json",
-    mimeType: "application/json",
-    content: JSON.stringify({ theme: "dark", lang: "en" }, null, 2),
-    isSubscribed: false,
-    annotations: {
-      audience: "application",
-      priority: 0.8,
+    resource: {
+      name: "settings.json",
+      uri: "file:///settings.json",
+      annotations: {
+        audience: ["user"],
+        priority: 0.8,
+      },
     },
-    lastUpdated: "2026-03-17T09:00:00Z",
+    contents: [
+      {
+        uri: "file:///settings.json",
+        mimeType: "application/json",
+        text: JSON.stringify({ theme: "dark", lang: "en" }, null, 2),
+      },
+    ],
+    isSubscribed: false,
+    lastUpdated: new Date("2026-03-17T09:00:00Z"),
   },
 };

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

@@ -1,31 +1,40 @@
 import { Button, Flex, Group, Stack, Text, Title } from "@mantine/core";
-import type { ContentBlock } from "@modelcontextprotocol/sdk/types.js";
+import type {
+  BlobResourceContents,
+  ContentBlock,
+  Resource,
+  TextResourceContents,
+} from "@modelcontextprotocol/sdk/types.js";
 import { AnnotationBadge } from "../../elements/AnnotationBadge/AnnotationBadge";
 import { ContentViewer } from "../../elements/ContentViewer/ContentViewer";
 import { CopyButton } from "../../elements/CopyButton/CopyButton";
 import { SubscribeButton } from "../../elements/SubscribeButton/SubscribeButton";
 
 export interface ResourcePreviewPanelProps {
-  uri: string;
-  mimeType: string;
-  annotations?: { audience?: string; priority?: number };
-  content: string;
-  lastUpdated?: string;
+  resource: Resource;
+  contents: (TextResourceContents | BlobResourceContents)[];
+  lastUpdated?: Date;
   isSubscribed: boolean;
   onRefresh: () => void;
   onSubscribe: () => void;
   onUnsubscribe: () => void;
 }
 
-function toContentBlock(content: string, mimeType: string): ContentBlock {
-  if (mimeType.startsWith("image/")) {
-    return { type: "image", data: content, mimeType };
+function toContentBlock(
+  item: TextResourceContents | BlobResourceContents,
+): ContentBlock {
+  if ("text" in item) {
+    return { type: "text", text: item.text };
   }
-  return { type: "text", text: content };
+  const mimeType = item.mimeType ?? "application/octet-stream";
+  if (mimeType.startsWith("image/")) {
+    return { type: "image", data: item.blob, mimeType };
+  }
+  return { type: "text", text: item.blob };
 }
 
-function formatLastUpdated(lastUpdated: string): string {
-  return `Last updated: ${lastUpdated}`;
+function formatLastUpdated(date: Date): string {
+  return `Last updated: ${date.toLocaleString()}`;
 }
 
 const HeaderRow = Group.withProps({
@@ -74,16 +83,18 @@ const ActionGroup = Group.withProps({
 const Spacer = Flex.withProps({});
 
 export function ResourcePreviewPanel({
-  uri,
-  mimeType,
-  annotations,
-  content,
+  resource,
+  contents,
   lastUpdated,
   isSubscribed,
   onRefresh,
   onSubscribe,
   onUnsubscribe,
 }: ResourcePreviewPanelProps) {
+  const { uri, annotations } = resource;
+  const mimeType =
+    contents[0]?.mimeType ?? resource.mimeType ?? "application/octet-stream";
+
   return (
     <Stack gap="md">
       <HeaderRow>
@@ -93,7 +104,9 @@ export function ResourcePreviewPanel({
           <CopyButton value={uri} />
         </UriGroup>
       </HeaderRow>
-      <ContentViewer block={toContentBlock(content, mimeType)} copyable />
+      {contents.map((item, index) => (
+        <ContentViewer key={index} block={toContentBlock(item)} copyable />
+      ))}
       <MetaRow>
         {lastUpdated ? (
           <TimestampText>{formatLastUpdated(lastUpdated)}</TimestampText>
@@ -105,12 +118,7 @@ export function ResourcePreviewPanel({
       <FooterRow>
         <AnnotationGroup>
           {annotations?.audience && (
-            <AnnotationBadge
-              facet="audience"
-              value={
-                annotations.audience.split(", ") as ("user" | "assistant")[]
-              }
-            />
+            <AnnotationBadge facet="audience" value={annotations.audience} />
           )}
           {annotations?.priority !== undefined && (
             <AnnotationBadge facet="priority" value={annotations.priority} />