refactor: remove all SQLite code, standardize on PostgreSQL

- Remove database provider switching logic from prisma.ts and auth.ts
- Hardcode PostgreSQL as the only supported database
- Remove switch-database.js and use-dev-db.js scripts
- Remove Python utility scripts that used sqlite3 directly
- Update justfile to remove SQLite test targets
- Update package.json to remove db:switch script
- Update Dockerfile.ci-base to default to PostgreSQL
- Update .env.example to remove SQLite mention
- Update playwright.config.ts comments
- Update .gitignore to remove SQLite file patterns

This eliminates the root cause of test failures: the dev server and test
Prisma client were using different databases (PostgreSQL vs SQLite).

src/lib/auth.ts

@@ -3,42 +3,34 @@ import { prismaAdapter } from "better-auth/adapters/prisma";
 import { prisma } from "./prisma";
 import { testUtils } from "better-auth/plugins";
 
-// Detect database provider from environment
-const databaseProvider = process.env.DATABASE_PROVIDER || "sqlite";
-
 export const auth = betterAuth({
   database: prismaAdapter(prisma, {
-    provider: databaseProvider as "sqlite" | "postgresql",
+    provider: "postgresql",
   }),
   emailAndPassword: {
     enabled: true,
-    autoSignIn: true, // Automatically sign in after registration
-    requireEmailVerification: false, // Don't require email verification for tests
-    minPasswordLength: 8, // Set minimum password length
-    maxPasswordLength: 128, // Set maximum password length
+    autoSignIn: true,
+    requireEmailVerification: false,
+    minPasswordLength: 8,
+    maxPasswordLength: 128,
   },
   secret: process.env.BETTER_AUTH_SECRET || process.env.NEXTAUTH_SECRET,
   baseURL: process.env.BETTER_AUTH_URL || process.env.NEXTAUTH_URL || "http://localhost:3000/api/auth",
-  // Configure trusted origins - parse from environment or use defaults
   trustedOrigins: (() => {
     const origins = [];
-    
-    // Add environment-specified origins
+
     if (process.env.TRUSTED_ORIGINS) {
       origins.push(...process.env.TRUSTED_ORIGINS.split(',').map(o => o.trim()));
     }
-    
-    // Add BETTER_AUTH_URL if set
+
     if (process.env.BETTER_AUTH_URL) {
       origins.push(process.env.BETTER_AUTH_URL);
     }
-    
-    // Add NEXTAUTH_URL if set
+
     if (process.env.NEXTAUTH_URL) {
       origins.push(process.env.NEXTAUTH_URL);
     }
-    
-    // Add defaults
+
     origins.push(
       "https://euchre.notsosm.art",
       "http://euchre.notsosm.art",
@@ -47,17 +39,14 @@ export const auth = betterAuth({
       "http://127.0.0.1:3000",
       "http://0.0.0.0:3000"
     );
-    
-    // Remove duplicates and empty strings
+
     return [...new Set(origins.filter(o => o))];
   })(),
   session: {
     cookieCache: {
-      enabled: false, // Disable cookie cache to avoid session cache issues
+      enabled: false,
     },
   },
-  // Configure rate limiting - disable for test environment
-  // Note: Rate limiting is disabled for all environments to ensure test reliability
   rateLimit: {
     enabled: false,
   },
@@ -66,21 +55,18 @@ export const auth = betterAuth({
     user: {
       create: {
         async after(user) {
-          // Generate a unique player name using timestamp and random string
           const timestamp = Date.now();
           const randomId = Math.random().toString(36).substring(2, 8);
           const baseName = user.name || user.email.split('@')[0];
           const uniqueName = `${baseName}-${timestamp}-${randomId}`;
-          
-          // Create a Player record for the new user
+
           const newPlayer = await prisma.player.create({
             data: {
               name: uniqueName,
               normalizedName: uniqueName.toLowerCase(),
             },
           });
-          
-          // Update the User with the playerId
+
           await prisma.user.update({
             where: { id: user.id },
             data: { playerId: newPlayer.id },
@@ -93,4 +79,4 @@ export const auth = betterAuth({
   plugins: [
     testUtils()
   ]
-});
+});

src/lib/prisma.ts

@@ -1,37 +1,19 @@
 import { PrismaClient } from '@prisma/client'
+import { PrismaPg } from '@prisma/adapter-pg'
 
 const globalForPrisma = globalThis as unknown as {
   prisma: PrismaClient | undefined
 }
 
-// Detect database provider from environment (default to sqlite for local development)
-// Next.js automatically loads environment variables from .env, .env.development, .env.production
-const databaseProvider = process.env.DATABASE_PROVIDER || 'sqlite'
 const databaseUrl = process.env.DATABASE_URL
 
-// Create PrismaClient with appropriate adapter
+if (!databaseUrl) {
+  throw new Error('DATABASE_URL environment variable is required.')
+}
+
 const createPrismaClient = () => {
-  let client: PrismaClient
-  
-  if (databaseProvider === 'postgresql') {
-    // Validate DATABASE_URL is present for PostgreSQL
-    if (!databaseUrl) {
-      throw new Error(
-        'DATABASE_URL environment variable is required when DATABASE_PROVIDER is set to postgresql. ' +
-        'Current DATABASE_PROVIDER: ' + databaseProvider
-      )
-    }
-    
-    // Use PrismaPg adapter for PostgreSQL
-    const { PrismaPg } = require('@prisma/adapter-pg')
-    const adapter = new PrismaPg({ connectionString: databaseUrl })
-    client = new PrismaClient({ adapter })
-  } else {
-    // No adapter needed for SQLite
-    client = new PrismaClient()
-  }
-  
-  return client
+  const adapter = new PrismaPg({ connectionString: databaseUrl })
+  return new PrismaClient({ adapter })
 }
 
 export const prisma = globalForPrisma.prisma ?? createPrismaClient()