MAESTRO: Consolidate GlobalAgentStats type to shared types

- Add GlobalAgentStats and ProviderStats interfaces to src/shared/types.ts
- Update agentSessions.ts to import and re-export from shared types
- Update AboutModal.tsx to import GlobalAgentStats from shared types
- Update test file to use shared GlobalAgentStats type instead of duplicate

Eliminates 3 duplicate definitions of GlobalAgentStats across the codebase.
All 47 AboutModal tests pass. TypeScript type checking passes.

src/__tests__/renderer/components/AboutModal.test.tsx

@@ -8,6 +8,7 @@ import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import { render, screen, fireEvent, waitFor, act } from '@testing-library/react';
 import { AboutModal } from '../../../renderer/components/AboutModal';
 import type { Theme, AutoRunStats } from '../../../renderer/types';
+import type { GlobalAgentStats } from '../../../shared/types';
 
 // Mock lucide-react icons
 vi.mock('lucide-react', () => ({
@@ -66,7 +67,7 @@ vi.mock('../../../renderer/components/AchievementCard', () => ({
   AchievementCard: ({ theme, autoRunStats, globalStats, onEscapeWithBadgeOpen }: {
     theme: Theme;
     autoRunStats: AutoRunStats;
-    globalStats: ClaudeGlobalStats | null;
+    globalStats: GlobalAgentStats | null;
     onEscapeWithBadgeOpen: (handler: (() => boolean) | null) => void;
   }) => (
     <div data-testid="achievement-card">
@@ -90,20 +91,6 @@ vi.mock('../../../renderer/components/AchievementCard', () => ({
 // Add __APP_VERSION__ global
 (globalThis as unknown as { __APP_VERSION__: string }).__APP_VERSION__ = '1.0.0';
 
-// Interface for global stats (matches GlobalAgentStats in AboutModal.tsx)
-interface ClaudeGlobalStats {
-  totalSessions: number;
-  totalMessages: number;
-  totalInputTokens: number;
-  totalOutputTokens: number;
-  totalCacheReadTokens: number;
-  totalCacheCreationTokens: number;
-  totalCostUsd: number;
-  hasCostData: boolean;
-  totalSizeBytes: number;
-  isComplete?: boolean;
-}
-
 // Create test theme
 const createTheme = (): Theme => ({
   id: 'test-dark',

src/main/ipc/handlers/agentSessions.ts

@@ -43,36 +43,13 @@ import type {
   SessionListOptions,
   SessionReadOptions,
 } from '../../agent-session-storage';
+import type { GlobalAgentStats, ProviderStats } from '../../../shared/types';
+
+// Re-export for backwards compatibility
+export type { GlobalAgentStats, ProviderStats };
 
 const LOG_CONTEXT = '[AgentSessions]';
 
-/**
- * Global stats aggregated from all providers
- */
-export interface GlobalAgentStats {
-  totalSessions: number;
-  totalMessages: number;
-  totalInputTokens: number;
-  totalOutputTokens: number;
-  totalCacheReadTokens: number;
-  totalCacheCreationTokens: number;
-  /** Total cost in USD - only includes providers that support cost tracking */
-  totalCostUsd: number;
-  /** Whether any provider contributed cost data */
-  hasCostData: boolean;
-  totalSizeBytes: number;
-  isComplete: boolean;
-  /** Per-provider breakdown */
-  byProvider: Record<string, {
-    sessions: number;
-    messages: number;
-    inputTokens: number;
-    outputTokens: number;
-    costUsd: number;
-    hasCostData: boolean;
-  }>;
-}
-
 /**
  * Generic agent session origins data structure
  * Structure: { [agentId]: { [projectPath]: { [sessionId]: { origin, sessionName, starred } } } }

src/renderer/components/AboutModal.tsx

@@ -1,35 +1,13 @@
 import React, { useEffect, useRef, useState, useCallback } from 'react';
 import { X, Wand2, ExternalLink, FileCode, BarChart3, Loader2, Trophy, Globe, Check, BookOpen } from 'lucide-react';
 import type { Theme, AutoRunStats, MaestroUsageStats, LeaderboardRegistration } from '../types';
+import type { GlobalAgentStats } from '../../shared/types';
 import { MODAL_PRIORITIES } from '../constants/modalPriorities';
 import pedramAvatar from '../assets/pedram-avatar.png';
 import { AchievementCard } from './AchievementCard';
 import { formatTokensCompact } from '../utils/formatters';
 import { Modal } from './ui/Modal';
 
-interface GlobalAgentStats {
-  totalSessions: number;
-  totalMessages: number;
-  totalInputTokens: number;
-  totalOutputTokens: number;
-  totalCacheReadTokens: number;
-  totalCacheCreationTokens: number;
-  totalCostUsd: number;
-  /** Whether any provider contributed cost data */
-  hasCostData: boolean;
-  totalSizeBytes: number;
-  isComplete?: boolean;
-  /** Per-provider breakdown */
-  byProvider?: Record<string, {
-    sessions: number;
-    messages: number;
-    inputTokens: number;
-    outputTokens: number;
-    costUsd: number;
-    hasCostData: boolean;
-  }>;
-}
-
 interface AboutModalProps {
   theme: Theme;
   autoRunStats: AutoRunStats;

src/shared/types.ts

@@ -329,3 +329,41 @@ export interface AgentSshRemoteConfig {
   /** Override working directory for this agent */
   workingDirOverride?: string;
 }
+
+// ============================================================================
+// Global Agent Statistics Types
+// ============================================================================
+
+/**
+ * Per-provider statistics breakdown
+ */
+export interface ProviderStats {
+  sessions: number;
+  messages: number;
+  inputTokens: number;
+  outputTokens: number;
+  costUsd: number;
+  hasCostData: boolean;
+}
+
+/**
+ * Global stats aggregated from all providers.
+ * Used by AboutModal and AgentSessions handlers.
+ */
+export interface GlobalAgentStats {
+  totalSessions: number;
+  totalMessages: number;
+  totalInputTokens: number;
+  totalOutputTokens: number;
+  totalCacheReadTokens: number;
+  totalCacheCreationTokens: number;
+  /** Total cost in USD - only includes providers that support cost tracking */
+  totalCostUsd: number;
+  /** Whether any provider contributed cost data */
+  hasCostData: boolean;
+  totalSizeBytes: number;
+  /** Whether stats calculation is complete (used for progressive updates) */
+  isComplete: boolean;
+  /** Per-provider breakdown */
+  byProvider: Record<string, ProviderStats>;
+}