feat: Add Mantine theme, 12 atom components, and 25 molecule components with Storybook stories

- Mantine theme with component extensions (Badge, Card, Paper, Button, etc.)
- CSS custom properties for design tokens (--inspector-* vars)
- Dark/light mode support with auto detection
- 12 atoms: StatusIndicator, AnnotationBadge, CapabilityItem, LogEntry,
  ProgressDisplay, ContentViewer, ListChangedIndicator, CopyButton,
  ConnectionToggle, TransportBadge, InlineError, MessageBubble
- 25 molecules: ServerCard, AddServerMenu, SchemaForm, ToolListItem,
  ToolDetailPanel, ResultPanel, ResourceListItem, ResourcePreviewPanel,
  ResourceTemplateInput, PromptArgumentsForm, PromptMessagesDisplay,
  LogControls, TaskCard, HistoryEntry, ServerInfoContent, ServerSettingsForm,
  RootsTable, SamplingRequestPanel, ElicitationFormPanel, ElicitationUrlPanel,
  InlineSamplingRequest, InlineElicitationRequest, PendingClientRequests,
  ImportServerJsonPanel, ExperimentalFeaturesPanel
- Exclude storybook-static from version control
- Exclude .stories.tsx from app tsconfig (Storybook-only modules)

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

clients/web/src/components/molecules/PromptMessagesDisplay/PromptMessagesDisplay.stories.tsx

@@ -0,0 +1,82 @@
+import type { Meta, StoryObj } from '@storybook/react-vite';
+import { fn } from 'storybook/test';
+import { PromptMessagesDisplay } from './PromptMessagesDisplay';
+
+const meta: Meta<typeof PromptMessagesDisplay> = {
+  title: 'Molecules/PromptMessagesDisplay',
+  component: PromptMessagesDisplay,
+  args: {
+    onCopy: fn(),
+  },
+};
+
+export default meta;
+type Story = StoryObj<typeof PromptMessagesDisplay>;
+
+export const SingleMessage: Story = {
+  args: {
+    messages: [
+      {
+        role: 'user',
+        content: 'What is the capital of France?',
+      },
+    ],
+  },
+};
+
+export const Conversation: Story = {
+  args: {
+    messages: [
+      {
+        role: 'user',
+        content: 'What is the capital of France?',
+      },
+      {
+        role: 'assistant',
+        content: 'The capital of France is Paris. It is the largest city in France and serves as the country\'s political, economic, and cultural center.',
+      },
+    ],
+  },
+};
+
+export const WithImage: Story = {
+  args: {
+    messages: [
+      {
+        role: 'user',
+        content: 'Here is a photo for you to analyze.',
+        imageContent: {
+          data: 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==',
+          mimeType: 'image/png',
+        },
+      },
+    ],
+  },
+};
+
+export const LongConversation: Story = {
+  args: {
+    messages: [
+      {
+        role: 'user',
+        content: 'Can you help me write a haiku about programming?',
+      },
+      {
+        role: 'assistant',
+        content: 'Sure! Here is a haiku about programming:\n\nSilent keys tap fast\nLogic flows through glowing screens\nBugs hide in the code',
+      },
+      {
+        role: 'user',
+        content: 'That is great! Can you write another one about debugging?',
+      },
+      {
+        role: 'assistant',
+        content: 'Here is a debugging haiku:\n\nStack trace lines scroll down\nOne missing semicolon\nHours lost to a typo',
+      },
+      {
+        role: 'user',
+        content: 'I love it! One more about open source?',
+      },
+    ],
+  },
+};