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/services/analytics/analytics.ts

@@ -1,5 +1,5 @@
 import { Task, TaskStatus, TaskPriority, TaskSource } from '@/lib/types';
-import { prisma } from './core/database';
+import { prisma } from '../core/database';
 import { getToday, parseDate, subtractDays } from '@/lib/date-utils';
 
 export interface ProductivityMetrics {

src/services/analytics/manager-summary.ts

@@ -1,4 +1,4 @@
-import { prisma } from './core/database';
+import { prisma } from '../core/database';
 import { startOfWeek, endOfWeek } from 'date-fns';
 import { getToday } from '@/lib/date-utils';
 

src/services/analytics/metrics.ts

@@ -1,4 +1,4 @@
-import { prisma } from './core/database';
+import { prisma } from '../core/database';
 import { startOfWeek, endOfWeek, eachDayOfInterval, format, startOfDay, endOfDay } from 'date-fns';
 import { fr } from 'date-fns/locale';
 import { formatDateForAPI, getDayName, getToday, subtractDays } from '@/lib/date-utils';