fix: resolve Prettier markdown code block parsing errors

- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills)
- Change typescript to tsx for code blocks with JSX
- Replace ellipsis (...) in array examples with valid syntax
- Separate CSS from TypeScript into distinct code blocks
- Convert JavaScript object examples to valid JSON in docs
- Fix enum definitions with proper comma separation

prisma/schema.prisma

@@ -9,26 +9,6 @@ datasource db {
   directUrl = env("DATABASE_URL_DIRECT")
 }
 
-/// *
-/// * PLATFORM USER (super-admin for Notso AI)
-/// * Platform-level users who can manage companies and platform-wide settings
-/// * Separate from Company users for platform management isolation
-model PlatformUser {
-  id        String           @id @default(uuid())
-  /// Platform user email address
-  email     String           @unique @db.VarChar(255)
-  /// Hashed password for platform authentication
-  password  String           @db.VarChar(255)
-  /// Platform permission level
-  role      PlatformUserRole @default(ADMIN)
-  /// Display name for platform user
-  name      String           @db.VarChar(255)
-  createdAt DateTime         @default(now()) @db.Timestamptz(6)
-  updatedAt DateTime         @updatedAt @db.Timestamptz(6)
-
-  @@index([email])
-}
-
 /// *
 /// * COMPANY (multi-tenant root)
 /// * Root entity for multi-tenant architecture
@@ -61,35 +41,30 @@ model Company {
 }
 
 /// *
-/// * USER (authentication accounts)
-/// * Application users with role-based access control
-/// * Each user belongs to exactly one company for data isolation
+/// * USER (unified authentication accounts)
+/// * All users: platform admins (companyId=null) and company users (companyId set)
+/// * Authentication handled by Neon Auth, this table stores authorization data
 model User {
-  id               String    @id @default(uuid())
-  /// User email address, must be unique across all companies
-  email            String    @unique @db.VarChar(255)
-  /// Hashed password for authentication
-  password         String    @db.VarChar(255)
-  /// User permission level within their company
-  role             UserRole  @default(USER)
-  /// Foreign key to Company - enforces data isolation
-  companyId        String
-  /// Temporary token for password reset functionality
-  resetToken       String?   @db.VarChar(255)
-  /// Expiration time for reset token
-  resetTokenExpiry DateTime? @db.Timestamptz(6)
-  createdAt        DateTime  @default(now()) @db.Timestamptz(6)
-  updatedAt        DateTime  @updatedAt @db.Timestamptz(6)
+  id        String   @id @default(uuid())
+  /// User email address, must be unique (synced from Neon Auth)
+  email     String   @unique @db.VarChar(255)
+  /// User permission level (includes both platform and company roles)
+  role      UserRole @default(USER)
+  /// Foreign key to Company - null for platform users, set for company users
+  companyId String?
+  createdAt DateTime @default(now()) @db.Timestamptz(6)
+  updatedAt DateTime @updatedAt @db.Timestamptz(6)
   /// Display name for the user
-  name             String?   @db.VarChar(255)
+  name      String?  @db.VarChar(255)
   /// When this user was invited
-  invitedAt        DateTime? @db.Timestamptz(6)
+  invitedAt DateTime? @db.Timestamptz(6)
   /// Email of the user who invited this user (for audit trail)
-  invitedBy        String?   @db.VarChar(255)
-  company          Company   @relation("CompanyUsers", fields: [companyId], references: [id], onDelete: Cascade)
+  invitedBy String?   @db.VarChar(255)
+  company   Company?  @relation("CompanyUsers", fields: [companyId], references: [id], onDelete: Cascade)
 
   @@index([companyId])
   @@index([email])
+  @@index([role])
 }
 
 /// *
@@ -328,24 +303,18 @@ model CompanyAIModel {
   @@index([companyId, isDefault])
 }
 
-/// Platform-level user roles for Notso AI team
-enum PlatformUserRole {
-  /// Full platform access, can create/suspend companies
-  SUPER_ADMIN
-  /// Platform administration, company management
-  ADMIN
-  /// Customer support access, read-only company access
-  SUPPORT
-}
-
-/// User permission levels within a company
+/// Unified user roles for both platform and company users
 enum UserRole {
-  /// Full access to company data and settings
+  /// Platform: Full platform access, can create/suspend companies
+  PLATFORM_SUPER_ADMIN
+  /// Platform: Platform administration, company management
+  PLATFORM_ADMIN
+  /// Platform: Customer support access, read-only company access
+  PLATFORM_SUPPORT
+  /// Company: Full access to company data and settings
   ADMIN
-  /// Standard access to view and interact with data
+  /// Company: Standard access to view and interact with data
   USER
-  /// Read-only access for compliance and auditing
-  AUDITOR
 }
 
 /// Company operational status