diff --git a/client/src/components/authors/author-works-display.tsx b/client/src/components/authors/author-works-display.tsx
index 958ae22..7dcd067 100644
--- a/client/src/components/authors/author-works-display.tsx
+++ b/client/src/components/authors/author-works-display.tsx
@@ -42,19 +42,30 @@ export function AuthorWorksDisplay({
   // Use the actual API hook to fetch author's works
   const { data: works, isLoading, error } = useAuthorWorks(authorId);
 
+  // Convert works with tag objects back to Work type for components
+  const worksForDisplay: Work[] = useMemo(() =>
+    works?.map(work => ({
+      ...work,
+      tags: work.tags?.map(tag =>
+        typeof tag === 'string' ? tag : tag.name
+      ),
+    })) || [],
+    [works]
+  );
+
   // Extract filter options from works data
   const years = useMemo(
     () =>
       Array.from(
-        new Set(works?.map((work) => work.year?.toString()).filter(Boolean))
+        new Set(worksForDisplay?.map((work) => work.year?.toString()).filter(Boolean))
       ).filter((year): year is string => year !== undefined),
-    [works]
+    [worksForDisplay]
   );
 
   const languages = useMemo(
     () =>
-      Array.from(new Set(works?.map((work) => work.language).filter(Boolean))),
-    [works]
+      Array.from(new Set(worksForDisplay?.map((work) => work.language).filter(Boolean))),
+    [worksForDisplay]
   );
 
   const workTypes = useMemo(
@@ -68,7 +79,7 @@ export function AuthorWorksDisplay({
   // Filter works based on selected filters
   const filteredWorks = useMemo(
     () =>
-      works?.filter((work) => {
+      worksForDisplay?.filter((work) => {
         if (
           filters.selectedYear &&
           work.year?.toString() !== filters.selectedYear
@@ -89,7 +100,7 @@ export function AuthorWorksDisplay({
         }
         return true;
       }),
-    [works, filters]
+    [worksForDisplay, filters]
   );
 
   // Group works by type
@@ -281,7 +292,7 @@ export function AuthorWorksDisplay({
           {/* Reading statistics (extracted component) */}
           {works && works.length > 0 && (
             <AuthorReadingStats
-              works={works}
+              works={worksForDisplay}
               workTypes={workTypes}
               languages={languages}
             />
diff --git a/client/src/components/authors/composables/author-stats.tsx b/client/src/components/authors/composables/author-stats.tsx
index a15f3d0..666b518 100644
--- a/client/src/components/authors/composables/author-stats.tsx
+++ b/client/src/components/authors/composables/author-stats.tsx
@@ -12,7 +12,7 @@ import {
   TooltipTrigger,
 } from "@/components/ui/tooltip";
 import { cn } from "@/lib/utils";
-import type { AuthorWithStats } from "../types";
+import type { AuthorWithStats } from "@shared/schema";
 import { authorUtils } from "../utils";
 
 const authorStatsVariants = cva("", {
@@ -65,38 +65,38 @@ export function AuthorStats({
     key: string;
   }> = [];
 
-  if (showWorksCount && author.worksCount) {
+  if (showWorksCount && author.works_count) {
     stats.push({
       icon: <BookOpen className="h-4 w-4" />,
       label: "Works",
-      value: authorUtils.formatNumber(author.worksCount, format),
+      value: authorUtils.formatNumber(author.works_count, format),
       key: "works",
     });
   }
 
-  if (showFollowersCount && author.followersCount) {
+  if (showFollowersCount && author.followers_count) {
     stats.push({
       icon: <Users className="h-4 w-4" />,
       label: "Followers",
-      value: authorUtils.formatNumber(author.followersCount, format),
+      value: authorUtils.formatNumber(author.followers_count, format),
       key: "followers",
     });
   }
 
-  if (showRating && author.averageRating) {
+  if (showRating && author.average_rating) {
     stats.push({
       icon: <Star className="h-4 w-4" />,
       label: "Rating",
-      value: authorUtils.formatRating(author.averageRating),
+      value: authorUtils.formatRating(author.average_rating),
       key: "rating",
     });
   }
 
-  if (showReadsCount && author.totalReads) {
+  if (showReadsCount && author.total_reads) {
     stats.push({
       icon: <TrendingUp className="h-4 w-4" />,
       label: "Reads",
-      value: authorUtils.formatNumber(author.totalReads, format),
+      value: authorUtils.formatNumber(author.total_reads, format),
       key: "reads",
     });
   }
diff --git a/client/src/components/authors/types.ts b/client/src/components/authors/types.ts
index a36a03b..555b02b 100644
--- a/client/src/components/authors/types.ts
+++ b/client/src/components/authors/types.ts
@@ -97,6 +97,16 @@ export interface AuthorDisplayUtils {
     text: string;
     isTruncated: boolean;
   };
+
+  /**
+   * Format numbers for display
+   */
+  formatNumber: (num: number, format?: 'numbers' | 'abbreviated' | 'full') => string;
+
+  /**
+   * Format rating for display
+   */
+  formatRating: (rating: number) => string;
 }
 
 // Timeline event for author pages
diff --git a/client/src/components/authors/utils.ts b/client/src/components/authors/utils.ts
index dc8f6cb..a861e37 100644
--- a/client/src/components/authors/utils.ts
+++ b/client/src/components/authors/utils.ts
@@ -30,6 +30,28 @@ export const authorUtils: AuthorDisplayUtils = {
       .slice(0, 2);
   },
 
+  /**
+   * Format numbers for display
+   */
+  formatNumber: (num: number, format: 'numbers' | 'abbreviated' | 'full' = 'full'): string => {
+    if (format === 'abbreviated') {
+      if (num >= 1000000) return `${(num / 1000000).toFixed(1)}M`;
+      if (num >= 1000) return `${(num / 1000).toFixed(1)}K`;
+      return num.toString();
+    }
+    if (format === 'numbers') {
+      return num.toLocaleString();
+    }
+    return num.toString();
+  },
+
+  /**
+   * Format rating for display
+   */
+  formatRating: (rating: number): string => {
+    return rating.toFixed(1);
+  },
+
   /**
    * Get display location from country/city
    */
diff --git a/client/src/components/blog/tag-manager.tsx b/client/src/components/blog/tag-manager.tsx
index 068b2ca..9f8e45b 100644
--- a/client/src/components/blog/tag-manager.tsx
+++ b/client/src/components/blog/tag-manager.tsx
@@ -32,7 +32,7 @@ export function TagManager({ name, tags, label = "Tags" }: TagManagerProps) {
 		const formTags = form.getValues(name) || [];
 		if (tags && formTags.length > 0) {
 			const initialTags = formTags
-				.map((id: number) => tags.find((t) => t.id === id))
+				.map((id: string) => tags.find((t) => t.id === id))
 				.filter(Boolean) as Tag[];
 			setSelectedTags(initialTags);
 		}
@@ -42,8 +42,7 @@ export function TagManager({ name, tags, label = "Tags" }: TagManagerProps) {
 	const handleAddTag = () => {
 		if (!selectedTagId) return;
 
-		const tagId = parseInt(selectedTagId, 10);
-		const tag = tags?.find((t) => t.id === tagId);
+		const tag = tags?.find((t) => t.id === selectedTagId);
 
 		if (tag && !selectedTags.some((t) => t.id === tag.id)) {
 			setSelectedTags([...selectedTags, tag]);
@@ -57,14 +56,14 @@ export function TagManager({ name, tags, label = "Tags" }: TagManagerProps) {
 	};
 
 	// Handle tag removal
-	const handleRemoveTag = (tagId: number) => {
+	const handleRemoveTag = (tagId: string) => {
 		setSelectedTags(selectedTags.filter((tag) => tag.id !== tagId));
 
 		// Update form values
 		const currentTags = form.getValues(name) || [];
 		form.setValue(
 			name,
-			currentTags.filter((id: number) => id !== tagId),
+			currentTags.filter((id: string) => id !== tagId),
 			{ shouldValidate: true },
 		);
 	};
diff --git a/client/src/components/common/__tests__/WorkCard.test.tsx b/client/src/components/common/__tests__/WorkCard.test.tsx
index 8551cb4..b42b1cd 100644
--- a/client/src/components/common/__tests__/WorkCard.test.tsx
+++ b/client/src/components/common/__tests__/WorkCard.test.tsx
@@ -1,19 +1,22 @@
 import { render, screen, fireEvent } from '@testing-library/react';
 import { WorkCard } from '../WorkCard';
-import { WorkWithAuthor } from '@/lib/types';
+import type { Work } from '@shared/schema';
 import { Toaster } from '@/components/ui/toaster';
 
-const mockWork: WorkWithAuthor = {
-  id: 1,
+const mockWork: Work & { author: { id: string; name: string } } = {
+  id: '1',
   title: 'Test Work',
   slug: 'test-work',
   type: 'poem',
   year: 2023,
   language: 'English',
+  content: 'Test content',
   description: 'This is a test description.',
+  createdAt: new Date().toISOString(),
   likes: 10,
-  tags: [{ id: 1, name: 'Test Tag' }],
-  author: { id: 1, name: 'Test Author' },
+  tags: ['test-tag'],
+  authorId: '1',
+  author: { id: '1', name: 'Test Author' },
 };
 
 describe('WorkCard', () => {
diff --git a/jest.config.cjs b/jest.config.cjs
index 04687ee..60511a1 100644
--- a/jest.config.cjs
+++ b/jest.config.cjs
@@ -3,10 +3,16 @@ module.exports = {
   testEnvironment: 'jest-environment-jsdom',
   setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
   extensionsToTreatAsEsm: ['.ts', '.tsx'],
+  globals: {
+    'ts-jest': {
+      useESM: true,
+    },
+  },
   moduleNameMapper: {
     '\\\\.(css|less|scss|sass)$': 'identity-obj-proxy',
     '\\\\.(gif|ttf|eot|svg|png)$': 'jest-transform-stub',
     '^@/(.*)$': '<rootDir>/client/src/$1',
+    '^@shared/(.*)$': '<rootDir>/shared/$1',
   },
   transform: {
     '^.+\\\\.tsx?$': ['babel-jest', { useESM: true }],
@@ -14,4 +20,8 @@ module.exports = {
   transformIgnorePatterns: [
     '/node_modules/(?!wouter|lucide-react)/',
   ],
+  testMatch: [
+    '<rootDir>/client/src/**/__tests__/**/*.(ts|tsx)',
+    '<rootDir>/client/src/**/*.(test|spec).(ts|tsx)',
+  ],
 };
diff --git a/package.json b/package.json
index d4857d7..db418f1 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
 		"check": "tsc",
 		"lint": "tsc --noEmit",
 		"test": "yarn test:unit && yarn test:e2e",
-		"test:unit": "yarn jest",
+		"test:unit": "jest",
 		"test:e2e": "playwright test"
 	},
 	"dependencies": {