Add new components, typography, badge contrast, and screen layout refactors

New element components:
- ListToggle: expand/collapse button using react-icons (RiExpandVerticalLine/RiCollapseVerticalLine)
- LogLevelBadge: extracted from LogEntry, handles all 8 log levels with filled variant and dark/light text contrast

New group components:
- ViewHeader: shared header bar for ConnectedView and UnconnectedView with discriminated union on `connected` prop; MCP logo links to modelcontextprotocol.io
- ServerListControls: combines ListToggle and AddServerMenu, hides toggle when no servers
- LogStreamPanel: extracted from LoggingScreen with scroll containment, filtering by visible levels and search text
- HistoryControls: vertical sidebar with search, method filter, export, and clear
- HistoryListPanel: extracted from HistoryScreen with ListToggle compact mode, filtering by method and search text

Badge contrast improvements:
- AnnotationBadge: filled variant for both dark/light modes; black text in dark, white text in light
- LogLevelBadge: same contrast approach; bold weight for alert/emergency levels
- Badge theme default weight reduced from 700 to 600

Typography:
- Added Fredoka (300-700) as body and heading font
- Added Roboto Mono as monospace font
- Google Fonts loaded in index.html and Storybook previewHead
- Heading weight set to 600

Screen layout refactors:
- LoggingScreen: owns filterText and visibleLevels state; passes to LogControls and LogStreamPanel; removed controls prop in favor of flat props
- HistoryScreen: owns searchText and methodFilter state; passes to HistoryControls and HistoryListPanel for filtering
- Both screens use new ScreenLayout (Flex variant="screen") and Sidebar subcomponents
- Added Flex theme with "screen" variant (overflow: hidden)
- Added Paper theme "panel" variant (flex column, overflow hidden)

Component enhancements:
- ServerCard: added compact prop showing only header row
- HistoryEntry: renamed isExpanded to isListExpanded; internal useState syncs via useEffect; individual entries toggle independently
- LogControls: Select All / Deselect All toggle for level checkboxes; nowrap on level selector group
- ConnectionToggle: LoadingOverlay with rounded corners for connecting state
- ConnectedView: ThemeToggle ActionIcon matched to DisconnectButton height (36px) and border color (outline variant)
- Storybook preview: fullscreen layout wrapper with 100vh overflow hidden

New stories:
- UnconnectedView: Connecting and ManyServers (12 servers for scroll testing)
- ServerCard: CompactConnected and CompactDisconnected
- All new components have corresponding stories

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

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

@@ -0,0 +1,77 @@
+import type { Meta, StoryObj } from "@storybook/react-vite";
+import { fn } from "storybook/test";
+import { LogStreamPanel } from "./LogStreamPanel";
+import type { LogEntryProps, LogLevel } from "../../elements/LogEntry/LogEntry";
+
+const meta: Meta<typeof LogStreamPanel> = {
+  title: "Groups/LogStreamPanel",
+  component: LogStreamPanel,
+  args: {
+    filterText: "",
+    visibleLevels: {
+      debug: true,
+      info: true,
+      notice: true,
+      warning: true,
+      error: true,
+      critical: true,
+      alert: true,
+      emergency: true,
+    },
+    autoScroll: true,
+    onToggleAutoScroll: fn(),
+    onCopyAll: fn(),
+  },
+};
+
+export default meta;
+type Story = StoryObj<typeof LogStreamPanel>;
+
+export const Empty: Story = {
+  args: {
+    entries: [],
+  },
+};
+
+const logMessages: { level: LogLevel; message: string; logger?: string }[] = [
+  { level: "info", message: "Server started on port 3000" },
+  { level: "debug", message: "Loading configuration", logger: "config" },
+  {
+    level: "warning",
+    message: "Deprecated API endpoint called",
+    logger: "http",
+  },
+  { level: "error", message: "Failed to read resource", logger: "resources" },
+  {
+    level: "info",
+    message: "Tool execution completed (245ms)",
+    logger: "tools",
+  },
+  {
+    level: "critical",
+    message: "Database connection pool exhausted",
+    logger: "db",
+  },
+  { level: "alert", message: "Memory usage exceeds 95%", logger: "system" },
+  { level: "emergency", message: "System unresponsive", logger: "system" },
+];
+
+function pad(n: number): string {
+  return n.toString().padStart(2, "0");
+}
+
+const entries: LogEntryProps[] = Array.from({ length: 30 }, (_, i) => {
+  const src = logMessages[i % logMessages.length];
+  return {
+    timestamp: `2026-03-17T10:00:${pad(i + 1)}Z`,
+    level: src.level,
+    message: src.message,
+    logger: src.logger,
+  };
+});
+
+export const WithEntries: Story = {
+  args: {
+    entries,
+  },
+};