feat: complete Phase 2 of service refactoring

- Marked tasks in `TODO.md` as completed for moving analytics-related files to the `analytics` directory and correcting imports across the codebase.
- Updated imports in `src/actions/analytics.ts`, `src/actions/metrics.ts`, and various components to reflect the new structure.
- Removed unused `analytics.ts`, `manager-summary.ts`, and `metrics.ts` files to streamline the codebase.

src/actions/analytics.ts

@@ -1,6 +1,6 @@
 'use server';
 
-import { AnalyticsService, ProductivityMetrics, TimeRange } from '@/services/analytics';
+import { AnalyticsService, ProductivityMetrics, TimeRange } from '@/services/analytics/analytics';
 
 export async function getProductivityMetrics(timeRange?: TimeRange): Promise<{
   success: boolean;

src/actions/metrics.ts

@@ -1,6 +1,6 @@
 'use server';
 
-import { MetricsService, WeeklyMetricsOverview, VelocityTrend } from '@/services/metrics';
+import { MetricsService, WeeklyMetricsOverview, VelocityTrend } from '@/services/analytics/metrics';
 import { getToday } from '@/lib/date-utils';
 
 /**