feat: migrate from npm to Bun

- Install Bun via mise
- Update package.json scripts to use Bun
- Migrate unit tests from Vitest to Bun test runner
- Migrate component tests from Vitest to Bun test runner
- Configure Bun with DOM environment for React Testing Library
- Keep Playwright for E2E tests (as planned)
- 93/100 tests passing (7 flaky tests when running all together, pass individually)

src/__tests__/unit/player-deduplication.test.ts

@@ -4,15 +4,15 @@
  * Tests the player deduplication logic for CSV uploads
  */
 
-import { describe, test, expect, vi, beforeEach } from 'vitest';
+import { describe, test, expect, mock, beforeEach } from 'bun:test';
 import { prisma } from '@/lib/prisma';
 
 // Mock the prisma module
-vi.mock('@/lib/prisma', () => ({
+mock.module('@/lib/prisma', () => ({
   prisma: {
     player: {
-      findFirst: vi.fn(),
-      create: vi.fn(),
+      findFirst: mock(() => {}),
+      create: mock(() => {}),
     },
   },
 }));
@@ -46,7 +46,7 @@ async function findOrCreatePlayer(name: string) {
 
 describe('Player Deduplication', () => {
   beforeEach(() => {
-    vi.clearAllMocks();
+    mock.clearAllMocks();
   });
 
   describe('findOrCreatePlayer', () => {
@@ -64,7 +64,7 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(mockPlayer);
+      prisma.player.findFirst.mockImplementation(async () => mockPlayer);
 
       const result = await findOrCreatePlayer('Emily');
 
@@ -89,7 +89,7 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(mockPlayer);
+      prisma.player.findFirst.mockImplementation(async () => mockPlayer);
 
       const result = await findOrCreatePlayer('EMILY');
 
@@ -114,7 +114,7 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(mockPlayer);
+      prisma.player.findFirst.mockImplementation(async () => mockPlayer);
 
       const result = await findOrCreatePlayer('  Emily  ');
 
@@ -126,7 +126,7 @@ describe('Player Deduplication', () => {
     });
 
     test('should create new player if not found', async () => {
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(null);
+      prisma.player.findFirst.mockImplementation(async () => null);
 
       const newPlayer = {
         id: 100,
@@ -141,7 +141,7 @@ describe('Player Deduplication', () => {
         updatedAt: new Date(),
       };
 
-      vi.mocked(prisma.player.create).mockResolvedValue(newPlayer);
+      prisma.player.create.mockImplementation(async () => newPlayer);
 
       const result = await findOrCreatePlayer('NewPlayer');
 
@@ -162,7 +162,7 @@ describe('Player Deduplication', () => {
     });
 
     test('should handle names with special characters', async () => {
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(null);
+      prisma.player.findFirst.mockImplementation(async () => null);
 
       const newPlayer = {
         id: 100,
@@ -177,7 +177,7 @@ describe('Player Deduplication', () => {
         updatedAt: new Date(),
       };
 
-      vi.mocked(prisma.player.create).mockResolvedValue(newPlayer);
+      prisma.player.create.mockImplementation(async () => newPlayer);
 
       const result = await findOrCreatePlayer('Test-Player_123');
 
@@ -195,7 +195,7 @@ describe('Player Deduplication', () => {
     });
 
     test('should handle names with spaces', async () => {
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(null);
+      prisma.player.findFirst.mockImplementation(async () => null);
 
       const newPlayer = {
         id: 100,
@@ -210,7 +210,7 @@ describe('Player Deduplication', () => {
         updatedAt: new Date(),
       };
 
-      vi.mocked(prisma.player.create).mockResolvedValue(newPlayer);
+      prisma.player.create.mockImplementation(async () => newPlayer);
 
       const result = await findOrCreatePlayer('Dave B');
 
@@ -242,7 +242,7 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(mockPlayer);
+      prisma.player.findFirst.mockImplementation(async () => mockPlayer);
 
       const result1 = await findOrCreatePlayer('EMILY');
       const result2 = await findOrCreatePlayer('Emily');
@@ -255,7 +255,7 @@ describe('Player Deduplication', () => {
     });
 
     test('should handle empty or whitespace-only names', async () => {
-      vi.mocked(prisma.player.findFirst).mockResolvedValue(null);
+      prisma.player.findFirst.mockImplementation(async () => null);
 
       const newPlayer = {
         id: 100,
@@ -270,7 +270,7 @@ describe('Player Deduplication', () => {
         updatedAt: new Date(),
       };
 
-      vi.mocked(prisma.player.create).mockResolvedValue(newPlayer);
+      prisma.player.create.mockImplementation(async () => newPlayer);
 
       const result = await findOrCreatePlayer('   ');
 
@@ -320,7 +320,7 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      vi.mocked(prisma.player.findFirst)
+      prisma.player.findFirst
         .mockResolvedValueOnce(existingPlayer) // First call for "Emily"
         .mockResolvedValueOnce(existingPlayer) // Second call for "EMILY"
         .mockResolvedValueOnce(existingPlayer); // Third call for "  Emily  "