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.tsx

@@ -0,0 +1,98 @@
+import { useMemo } from "react";
+import {
+  Button,
+  Checkbox,
+  Group,
+  Paper,
+  ScrollArea,
+  Stack,
+  Text,
+  Title,
+} from "@mantine/core";
+import { LogEntry } from "../../elements/LogEntry/LogEntry";
+import type { LogEntryProps } from "../../elements/LogEntry/LogEntry";
+
+export interface LogStreamPanelProps {
+  entries: LogEntryProps[];
+  filterText: string;
+  visibleLevels: Record<string, boolean>;
+  autoScroll: boolean;
+  onToggleAutoScroll: () => void;
+  onCopyAll: () => void;
+}
+
+const PanelContainer = Paper.withProps({
+  withBorder: true,
+  p: "lg",
+  flex: 1,
+  variant: "panel",
+});
+
+const ToolbarButton = Button.withProps({
+  variant: "light",
+  size: "sm",
+});
+
+const EmptyCenter = Stack.withProps({
+  flex: 1,
+  align: "center",
+  justify: "center",
+});
+
+function matchesFilters(
+  entry: LogEntryProps,
+  filterText: string,
+  visibleLevels: Record<string, boolean>,
+): boolean {
+  if (!visibleLevels[entry.level]) return false;
+  if (filterText) {
+    const term = filterText.toLowerCase();
+    const searchable =
+      `${entry.message} ${entry.logger ?? ""} ${entry.level}`.toLowerCase();
+    if (!searchable.includes(term)) return false;
+  }
+  return true;
+}
+
+export function LogStreamPanel({
+  entries,
+  filterText,
+  visibleLevels,
+  autoScroll,
+  onToggleAutoScroll,
+  onCopyAll,
+}: LogStreamPanelProps) {
+  const filteredEntries = useMemo(
+    () => entries.filter((e) => matchesFilters(e, filterText, visibleLevels)),
+    [entries, filterText, visibleLevels],
+  );
+
+  return (
+    <PanelContainer>
+      <Group justify="space-between" mb="sm">
+        <Title order={4}>Log Stream</Title>
+        <Group>
+          <Checkbox
+            label="Auto-scroll"
+            checked={autoScroll}
+            onChange={onToggleAutoScroll}
+          />
+          <ToolbarButton onClick={onCopyAll}>Copy All</ToolbarButton>
+        </Group>
+      </Group>
+      {filteredEntries.length > 0 ? (
+        <ScrollArea.Autosize mah="calc(100vh - var(--app-shell-header-height, 0px) - 150px)">
+          <Stack gap="xs">
+            {filteredEntries.map((entry, index) => (
+              <LogEntry key={index} {...entry} />
+            ))}
+          </Stack>
+        </ScrollArea.Autosize>
+      ) : (
+        <EmptyCenter>
+          <Text c="dimmed">No log entries</Text>
+        </EmptyCenter>
+      )}
+    </PanelContainer>
+  );
+}