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/ElicitationUrlPanel/ElicitationUrlPanel.tsx

@@ -0,0 +1,60 @@
+import { Alert, Button, Code, Divider, Group, Loader, Stack, Text } from '@mantine/core'
+
+export interface ElicitationUrlPanelProps {
+  message: string
+  url: string
+  elicitationId: string
+  isWaiting: boolean
+  onCopyUrl: () => void
+  onOpenInBrowser: () => void
+  onCancel: () => void
+}
+
+export function ElicitationUrlPanel({
+  message,
+  url,
+  elicitationId,
+  isWaiting,
+  onCopyUrl,
+  onOpenInBrowser,
+  onCancel,
+}: ElicitationUrlPanelProps) {
+  return (
+    <Stack gap="md">
+      <Text size="md" fs="italic">
+        {message}
+      </Text>
+      <Divider />
+      <Text size="sm">The server is requesting you visit:</Text>
+      <Code block>{url}</Code>
+      <Group>
+        <Button variant="light" onClick={onCopyUrl}>
+          Copy URL
+        </Button>
+        <Button variant="light" onClick={onOpenInBrowser}>
+          Open in Browser
+        </Button>
+      </Group>
+      <Divider />
+      {isWaiting && (
+        <Group>
+          <Loader size="sm" />
+          <Text size="sm" c="dimmed">
+            Waiting for completion...
+          </Text>
+        </Group>
+      )}
+      <Text size="xs" c="dimmed">
+        Elicitation ID: {elicitationId}
+      </Text>
+      <Alert color="yellow" title="Warning">
+        This will open an external URL. Verify the domain before proceeding.
+      </Alert>
+      <Group justify="flex-end">
+        <Button variant="light" onClick={onCancel}>
+          Cancel
+        </Button>
+      </Group>
+    </Stack>
+  )
+}