feat(tui): add RalphPanel component for loop tracking

- Display Ralph loop status (active/idle)
- Show completion phrase, cycle count, elapsed time
- Display todo list with status icons (pending/in_progress/completed)
- Truncate long todo items, limit to 5 visible
- Use magenta border to match web UI styling

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/tui/components/RalphPanel.tsx

@@ -0,0 +1,115 @@
+/**
+ * @fileoverview RalphPanel component
+ *
+ * Displays Ralph Wiggum loop tracking information:
+ * - Loop status and completion phrase
+ * - Todo list with progress
+ * - Cycle count and elapsed time
+ */
+
+import React from 'react';
+import { Box, Text } from 'ink';
+import type { InnerLoopState, InnerTodoItem } from '../../types.js';
+
+interface RalphPanelProps {
+  loopState: InnerLoopState | null;
+  todos: InnerTodoItem[];
+  visible?: boolean;
+}
+
+/**
+ * Status icon for todo items
+ */
+function getStatusIcon(status: string): { icon: string; color: string } {
+  switch (status) {
+    case 'completed':
+      return { icon: '\u2713', color: 'green' };
+    case 'in_progress':
+      return { icon: '\u25CF', color: 'yellow' };
+    case 'pending':
+    default:
+      return { icon: '\u25CB', color: 'gray' };
+  }
+}
+
+/**
+ * Formats elapsed hours to human-readable string
+ */
+function formatElapsed(hours: number | null): string {
+  if (hours === null) return '-';
+  if (hours < 1) {
+    const minutes = Math.round(hours * 60);
+    return `${minutes}m`;
+  }
+  return `${hours.toFixed(1)}h`;
+}
+
+/**
+ * RalphPanel component showing loop tracking
+ */
+export function RalphPanel({
+  loopState,
+  todos,
+  visible = true,
+}: RalphPanelProps): React.ReactElement | null {
+  // Don't render if not visible or no loop state
+  if (!visible || !loopState || !loopState.enabled) {
+    return null;
+  }
+
+  const completedCount = todos.filter((t) => t.status === 'completed').length;
+  const totalCount = todos.length;
+  const progressPercent = totalCount > 0 ? Math.round((completedCount / totalCount) * 100) : 0;
+
+  return (
+    <Box flexDirection="column" borderStyle="single" borderColor="magenta" marginBottom={1}>
+      {/* Header */}
+      <Box paddingX={1} justifyContent="space-between">
+        <Text color="magenta" bold>
+          Ralph Loop {loopState.active ? '(active)' : '(idle)'}
+        </Text>
+        {loopState.completionPhrase && (
+          <Text dimColor>
+            phrase: {loopState.completionPhrase}
+          </Text>
+        )}
+      </Box>
+
+      {/* Stats row */}
+      <Box paddingX={1}>
+        <Text>
+          <Text dimColor>cycles:</Text> {loopState.cycleCount}
+          {loopState.maxIterations && <Text>/{loopState.maxIterations}</Text>}
+          <Text> | </Text>
+          <Text dimColor>elapsed:</Text> {formatElapsed(loopState.elapsedHours)}
+          <Text> | </Text>
+          <Text dimColor>todos:</Text> {completedCount}/{totalCount} ({progressPercent}%)
+        </Text>
+      </Box>
+
+      {/* Todo list (max 5 items) */}
+      {todos.length > 0 && (
+        <Box flexDirection="column" paddingX={1} marginTop={1}>
+          {todos.slice(0, 5).map((todo) => {
+            const { icon, color } = getStatusIcon(todo.status);
+            const content = todo.content.length > 50
+              ? todo.content.slice(0, 47) + '...'
+              : todo.content;
+
+            return (
+              <Box key={todo.id}>
+                <Text color={color}>{icon} </Text>
+                <Text color={todo.status === 'completed' ? 'gray' : undefined}>
+                  {content}
+                </Text>
+              </Box>
+            );
+          })}
+          {todos.length > 5 && (
+            <Text dimColor>... and {todos.length - 5} more</Text>
+          )}
+        </Box>
+      )}
+    </Box>
+  );
+}

src/tui/components/index.ts

@@ -7,3 +7,4 @@ export { TabBar } from './TabBar.js';
 export { TerminalView } from './TerminalView.js';
 export { StatusBar } from './StatusBar.js';
 export { HelpOverlay } from './HelpOverlay.js';
+export { RalphPanel } from './RalphPanel.js';