fix(frontend): Fix critical type safety issues from code review

Address all Critical and High Priority issues identified in frontend code review report:

Critical Issues Fixed:
- Created unified logger utility (lib/utils/logger.ts) to replace all console.log statements
- Consolidated User type definitions - removed duplicate from authStore, using single source from types/user.ts
- Eliminated 'any' types in API client - added proper generic types with AxiosRequestConfig
- Fixed SignalR ConnectionManager - replaced 'any' with generic types <T>
- Created API error types (lib/types/errors.ts) with ApiError and getErrorMessage helper
- Fixed IssueCard component - removed all type assertions, created discriminated union types for Kanban items
- Added React.memo to IssueCard for performance optimization
- Added proper ARIA labels and accessibility attributes to IssueCard

High Priority Issues Fixed:
- Fixed hardcoded user ID in CreateProjectDialog - now uses actual user from authStore
- Added useCallback to CreateProjectDialog onSubmit handler
- Fixed error handlers in use-epics.ts - replaced 'any' with ApiError type
- Updated all error handling to use logger and getErrorMessage

Type Safety Improvements:
- Created KanbanItem discriminated union (KanbanEpic | KanbanStory | KanbanTask) with proper type guards
- Added 'never' types to prevent invalid property access
- Fixed User interface to include all required fields (createdAt, updatedAt)
- Maintained backward compatibility with LegacyKanbanBoard for existing code

Files Changed:
- lib/utils/logger.ts - New centralized logging utility
- lib/types/errors.ts - New API error types and helpers
- types/user.ts - Consolidated User type with TenantRole
- types/kanban.ts - New discriminated union types for type-safe Kanban items
- components/features/kanban/IssueCard.tsx - Type-safe with React.memo
- components/features/projects/CreateProjectDialog.tsx - Fixed hardcoded user ID, added useCallback
- lib/api/client.ts - Eliminated 'any', added proper generics
- lib/signalr/ConnectionManager.ts - Replaced console.log, added generics
- lib/hooks/use-epics.ts - Fixed error handler types
- stores/authStore.ts - Removed duplicate User type
- lib/hooks/useAuth.ts - Added createdAt field to User

TypeScript compilation: ✅ All type checks passing (0 errors)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

components/features/projects/CreateProjectDialog.tsx

@@ -1,5 +1,6 @@
 'use client';
 
+import { useCallback } from 'react';
 import { useForm } from 'react-hook-form';
 import { zodResolver } from '@hookform/resolvers/zod';
 import * as z from 'zod';
@@ -23,6 +24,9 @@ import {
 import { Input } from '@/components/ui/input';
 import { Button } from '@/components/ui/button';
 import { useCreateProject } from '@/lib/hooks/use-projects';
+import { useAuthStore } from '@/stores/authStore';
+import { toast } from 'sonner';
+import { logger } from '@/lib/utils/logger';
 import type { CreateProjectDto } from '@/types/project';
 
 const projectSchema = z.object({
@@ -45,6 +49,7 @@ export function CreateProjectDialog({
   onOpenChange,
 }: CreateProjectDialogProps) {
   const createProject = useCreateProject();
+  const user = useAuthStore((state) => state.user);
 
   const form = useForm<CreateProjectDto>({
     resolver: zodResolver(projectSchema),
@@ -55,20 +60,34 @@ export function CreateProjectDialog({
     },
   });
 
-  const onSubmit = async (data: CreateProjectDto) => {
-    try {
-      // TODO: Replace with actual user ID from auth context
-      const projectData = {
-        ...data,
-        ownerId: '00000000-0000-0000-0000-000000000001',
-      };
-      await createProject.mutateAsync(projectData);
-      form.reset();
-      onOpenChange(false);
-    } catch (error) {
-      console.error('Failed to create project:', error);
-    }
-  };
+  const onSubmit = useCallback(
+    async (data: CreateProjectDto) => {
+      // Validate user is logged in
+      if (!user) {
+        toast.error('You must be logged in to create a project');
+        logger.error('Attempted to create project without authentication');
+        return;
+      }
+
+      try {
+        const projectData = {
+          ...data,
+          ownerId: user.id,
+        };
+
+        logger.debug('Creating project', projectData);
+        await createProject.mutateAsync(projectData);
+
+        form.reset();
+        onOpenChange(false);
+        toast.success('Project created successfully');
+      } catch (error) {
+        logger.error('Failed to create project', error);
+        toast.error('Failed to create project. Please try again.');
+      }
+    },
+    [createProject, form, onOpenChange, user]
+  );
 
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>