feat(allocation): implement resource allocation feature

- Add AllocationController with CRUD + bulk endpoints
- Add AllocationValidationService for capacity/estimate validation
- Add AllocationMatrixService for optimized matrix queries
- Add AllocationPolicy for authorization
- Add AllocationResource for API responses
- Add frontend allocationService and matrix UI
- Add E2E tests for allocation matrix (20 tests)
- Add unit tests for validation service and policies
- Fix month format conversion (YYYY-MM to YYYY-MM-01)

frontend/src/lib/services/allocationService.ts

@@ -0,0 +1,92 @@
+/**
+ * Allocation Service
+ * 
+ * API operations for resource allocation management.
+ */
+
+import { api } from './api';
+
+export interface Allocation {
+  id: string;
+  project_id: string;
+  team_member_id: string;
+  month: string;
+  allocated_hours: string;
+  created_at: string;
+  updated_at: string;
+  project?: {
+    id: string;
+    code: string;
+    title: string;
+  };
+  team_member?: {
+    id: string;
+    name: string;
+  };
+}
+
+export interface CreateAllocationRequest {
+  project_id: string;
+  team_member_id: string;
+  month: string;
+  allocated_hours: number;
+}
+
+export interface UpdateAllocationRequest {
+  allocated_hours: number;
+}
+
+export interface BulkAllocationRequest {
+  allocations: CreateAllocationRequest[];
+}
+
+// Allocation API methods
+export const allocationService = {
+  /**
+   * Get all allocations, optionally filtered by month
+   */
+  getAll: (month?: string) => {
+    const query = month ? `?month=${month}` : '';
+    return api.get<Allocation[]>(`/allocations${query}`);
+  },
+
+  /**
+   * Get a single allocation by ID
+   */
+  getById: (id: string) => 
+    api.get<Allocation>(`/allocations/${id}`),
+
+  /**
+   * Create a new allocation
+   */
+  create: (data: CreateAllocationRequest) => 
+    api.post<Allocation>('/allocations', data),
+
+  /**
+   * Update an existing allocation
+   */
+  update: (id: string, data: UpdateAllocationRequest) => 
+    api.put<Allocation>(`/allocations/${id}`, data),
+
+  /**
+   * Delete an allocation
+   */
+  delete: (id: string) => 
+    api.delete<{ message: string }>(`/allocations/${id}`),
+
+  /**
+   * Bulk create allocations
+   */
+  bulkCreate: (data: BulkAllocationRequest) => 
+    api.post<Allocation[]>('/allocations/bulk', data),
+};
+
+/**
+ * Format allocated hours
+ */
+export function formatAllocatedHours(hours: string | number): string {
+  const numHours = typeof hours === 'string' ? parseFloat(hours) : hours;
+  return `${numHours}h`;
+}
+
+export default allocationService;

frontend/src/lib/services/api.ts

@@ -144,7 +144,15 @@ interface ApiRequestOptions {
 
 // Main API request function
 export async function apiRequest<T>(endpoint: string, options: ApiRequestOptions = {}): Promise<T> {
-  const url = `${API_BASE_URL}${endpoint}`;
+  // Ensure we have an absolute URL for server-side rendering
+  let url = endpoint;
+  if (!url.startsWith('http://') && !url.startsWith('https://')) {
+    // Get the base URL - works in both browser and server contexts
+    const baseUrl = typeof window !== 'undefined' 
+      ? '' 
+      : process.env['ORIGIN'] || '';
+    url = `${baseUrl}${API_BASE_URL}${endpoint}`;
+  }
   
   // Prepare headers
   const headers: Record<string, string> = {