docs: add comprehensive code comments, update README and TASKS, create training and troubleshooting guides

- Add JSDoc comments to API routes and business logic functions
- Update README.md with Phase 2 status and deployment/production notes
- Enhance TASKS.md with estimated timelines and dependencies
- Create docs/STAFF_TRAINING.md for team onboarding
- Create docs/CLIENT_ONBOARDING.md for customer experience
- Create docs/OPERATIONAL_PROCEDURES.md for daily operations
- Create docs/TROUBLESHOOTING.md for common setup issues
- Fix TypeScript errors in hq/page.tsx

lib/auth/context.tsx

@@ -14,6 +14,9 @@ type AuthContextType = {
 
 const AuthContext = createContext<AuthContextType | undefined>(undefined)
 
+/**
+ * AuthProvider component that manages authentication state and provides it to children.
+ */
 export function AuthProvider({ children }: { children: ReactNode }) {
   const [user, setUser] = useState<User | null>(null)
   const [session, setSession] = useState<Session | null>(null)
@@ -72,6 +75,9 @@ export function AuthProvider({ children }: { children: ReactNode }) {
   return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>
 }
 
+/**
+ * useAuth hook that returns the current authentication context.
+ */
 export function useAuth() {
   const context = useContext(AuthContext)
   if (context === undefined) {

lib/db/types.ts

@@ -1,5 +1,6 @@
 // Types based on SalonOS database schema
 
+/** User roles in the system */
 export type UserRole = 'admin' | 'manager' | 'staff' | 'artist' | 'customer' | 'kiosk'
 export type CustomerTier = 'free' | 'gold' | 'black' | 'VIP'
 export type BookingStatus = 'pending' | 'confirmed' | 'cancelled' | 'completed' | 'no_show'
@@ -7,6 +8,7 @@ export type InvitationStatus = 'pending' | 'used' | 'expired'
 export type ResourceType = 'station' | 'room' | 'equipment'
 export type AuditAction = 'create' | 'update' | 'delete' | 'reset_invitations' | 'payment' | 'status_change'
 
+/** Represents a salon location with timezone and contact info */
 export interface Location {
   id: string
   name: string
@@ -100,6 +102,7 @@ export interface Invitation {
   inviter?: Customer
 }
 
+/** Represents a customer booking with service, staff, and resource assignments */
 export interface Booking {
   id: string
   short_id: string

lib/supabase/client.ts

@@ -3,8 +3,10 @@ import { createClient } from '@supabase/supabase-js'
 const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL!
 const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!
 
+// Public Supabase client for client-side operations
 export const supabase = createClient(supabaseUrl, supabaseAnonKey)
 
+// Admin Supabase client for server-side operations with service role
 export const supabaseAdmin = createClient(
   supabaseUrl,
   process.env.SUPABASE_SERVICE_ROLE_KEY!,

lib/utils.ts

@@ -1,6 +1,9 @@
 import { type ClassValue, clsx } from "clsx"
 import { twMerge } from "tailwind-merge"
 
+/**
+ * cn function that merges class names using clsx and tailwind-merge.
+ */
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
 }

lib/utils/short-id.ts

@@ -1,5 +1,8 @@
 import { supabaseAdmin } from '@/lib/supabase/client'
 
+/**
+ * generateShortId function that generates a unique short ID using Supabase RPC.
+ */
 export async function generateShortId(): Promise<string> {
   const { data, error } = await supabaseAdmin.rpc('generate_short_id')