fix: separate client and server utilities to fix build error

Split lib/utils.ts into:
- lib/utils.ts: Client-safe utilities only (no Node.js imports)
- lib/project-utils.ts: Server-only utilities with Node.js imports

This fixes the Next.js build error where client components were importing
modules that contained Node.js dependencies (fs, path).

All tests pass and build succeeds.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/__tests__/projects.test.ts

@@ -6,7 +6,7 @@ import { GET } from '../projects/route';
 import { getProjects } from '@/lib/fs-utils';
 
 jest.mock('@/lib/fs-utils');
-jest.mock('@/lib/utils', () => ({
+jest.mock('@/lib/project-utils', () => ({
   getProjectDisplayName: jest.fn((name) => name === 'FT' ? '外放构建' : name),
 }));
 

app/api/projects/route.ts

@@ -1,7 +1,7 @@
 // app/api/projects/route.ts
 import { NextResponse } from 'next/server';
 import { getProjects } from '@/lib/fs-utils';
-import { getProjectDisplayName } from '@/lib/utils';
+import { getProjectDisplayName } from '@/lib/project-utils';
 
 export async function GET() {
   try {

lib/__tests__/project-utils.test.ts

@@ -0,0 +1,44 @@
+import { getProjectDisplayName } from '../project-utils';
+
+// Mock fs module
+const fs = require('fs');
+const path = require('path');
+jest.mock('fs');
+jest.mock('path');
+
+describe('getProjectDisplayName', () => {
+  const originalAliases = {
+    'FT': '外放构建',
+    'FT_DEV': '开发构建',
+  };
+
+  beforeEach(() => {
+    // Mock the aliases file
+    path.join.mockReturnValue('/mock/lib/project-aliases.json');
+    fs.readFileSync.mockReturnValue(JSON.stringify(originalAliases));
+  });
+
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should return display name for aliased project', () => {
+    expect(getProjectDisplayName('FT')).toBe('外放构建');
+  });
+
+  it('should return directory name when no alias exists', () => {
+    expect(getProjectDisplayName('UNKNOWN')).toBe('UNKNOWN');
+  });
+
+  it('should return directory name when aliases file is empty', () => {
+    fs.readFileSync.mockReturnValue('{}');
+    expect(getProjectDisplayName('FT')).toBe('FT');
+  });
+
+  it('should return directory name when aliases file cannot be read', () => {
+    fs.readFileSync.mockImplementation(() => {
+      throw new Error('File not found');
+    });
+    expect(getProjectDisplayName('FT')).toBe('FT');
+  });
+});

lib/__tests__/utils.test.ts

@@ -1,11 +1,4 @@
-import { formatVersion, formatFileSize, formatDateTime, getProjectDisplayName } from '../utils';
-
-// Mock fs module
-const fs = require('fs');
-jest.mock('fs', () => ({
-  ...jest.requireActual('fs'),
-  readFileSync: jest.fn(),
-}));
+import { formatVersion, formatFileSize, formatDateTime } from '../utils';
 
 describe('formatVersion', () => {
   test('应该将下划线替换为点号', () => {
@@ -70,39 +63,3 @@ describe('formatDateTime', () => {
     expect(formatDateTime(date)).toBe('2024-01-05 09:05');
   });
 });
-
-describe('getProjectDisplayName', () => {
-  const originalAliases = {
-    'FT': '外放构建',
-    'FT_DEV': '开发构建',
-  };
-
-  beforeEach(() => {
-    // Mock the aliases file
-    fs.readFileSync.mockReturnValue(JSON.stringify(originalAliases));
-  });
-
-  afterEach(() => {
-    jest.clearAllMocks();
-  });
-
-  it('should return display name for aliased project', () => {
-    expect(getProjectDisplayName('FT')).toBe('外放构建');
-  });
-
-  it('should return directory name when no alias exists', () => {
-    expect(getProjectDisplayName('UNKNOWN')).toBe('UNKNOWN');
-  });
-
-  it('should return directory name when aliases file is empty', () => {
-    fs.readFileSync.mockReturnValue('{}');
-    expect(getProjectDisplayName('FT')).toBe('FT');
-  });
-
-  it('should return directory name when aliases file cannot be read', () => {
-    fs.readFileSync.mockImplementation(() => {
-      throw new Error('File not found');
-    });
-    expect(getProjectDisplayName('FT')).toBe('FT');
-  });
-});

lib/project-utils.ts

@@ -0,0 +1,19 @@
+// lib/project-utils.ts
+// Server-only utility functions
+import * as fs from 'fs';
+import * as path from 'path';
+
+/**
+ * 获取项目显示名称（从别名配置）
+ */
+export function getProjectDisplayName(projectName: string): string {
+  try {
+    const aliasesPath = path.join(process.cwd(), 'lib', 'project-aliases.json');
+    const aliasesContent = fs.readFileSync(aliasesPath, 'utf-8');
+    const aliases = JSON.parse(aliasesContent);
+    return aliases[projectName] || projectName;
+  } catch {
+    // If file doesn't exist or is invalid, return original name
+    return projectName;
+  }
+}

lib/utils.ts

@@ -1,7 +1,5 @@
 // lib/utils.ts
 // Client-safe utility functions
-import * as fs from 'fs';
-import * as path from 'path';
 
 /**
  * 格式化版本号显示 (0_42 -> 0.42)
@@ -31,18 +29,3 @@ export function formatDateTime(date: Date): string {
   const minutes = String(date.getMinutes()).padStart(2, '0');
   return `${year}-${month}-${day} ${hours}:${minutes}`;
 }
-
-/**
- * 获取项目显示名称（从别名配置）
- */
-export function getProjectDisplayName(projectName: string): string {
-  try {
-    const aliasesPath = path.join(process.cwd(), 'lib', 'project-aliases.json');
-    const aliasesContent = fs.readFileSync(aliasesPath, 'utf-8');
-    const aliases = JSON.parse(aliasesContent);
-    return aliases[projectName] || projectName;
-  } catch {
-    // If file doesn't exist or is invalid, return original name
-    return projectName;
-  }
-}