feat: Hotfix Part1 - Backend support for company postal code, service tiers, timesheet naming

- Add postal_code column to companies table
- Add pricing_tiers column to services table for tiered pricing
- Update timesheet upload to generate filename in format {firstname}-{lastname}-timesheet-{date}

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/db/migrations/0008_add_company_postal_code.sql

@@ -0,0 +1,2 @@
+-- Add postal_code column to companies table
+ALTER TABLE "companies" ADD COLUMN IF NOT EXISTS "postal_code" text;

src/db/migrations/0009_add_service_pricing_tiers.sql

@@ -0,0 +1,2 @@
+-- Add pricing_tiers column to services table for tiered pricing
+ALTER TABLE "services" ADD COLUMN IF NOT EXISTS "pricing_tiers" text;

src/db/schema.js

@@ -126,6 +126,7 @@ export const companies = pgTable('companies', {
   description: text('description'),
   address: text('address'),
   city: text('city'),
+  postalCode: text('postal_code'),
   country: text('country'),
   phone: text('phone'),
   email: text('email'),
@@ -320,6 +321,7 @@ export const services = pgTable('services', {
   id: uuid('id').primaryKey().defaultRandom(),
   name: text('name').notNull(),
   price: text('price').notNull(), // stored as text for flexibility with decimal
+  pricingTiers: text('pricing_tiers'), // JSON array of tiers: [{tier: "Silver", price: "€149"}, ...]
   description: text('description'),
   createdBy: uuid('created_by').references(() => users.id, { onDelete: 'set null' }),
   createdAt: timestamp('created_at').defaultNow().notNull(),

src/services/timesheet.service.js

@@ -76,16 +76,41 @@ const safeUnlink = async (filePath) => {
   }
 };
 
+const generateTimesheetFileName = (firstName, lastName, year, month, fileExt) => {
+  const cleanFirstName = (firstName || 'user').toLowerCase().replace(/\s+/g, '-');
+  const cleanLastName = (lastName || '').toLowerCase().replace(/\s+/g, '-');
+  const monthStr = String(month).padStart(2, '0');
+  const namePrefix = cleanLastName ? `${cleanFirstName}-${cleanLastName}` : cleanFirstName;
+  return `${namePrefix}-timesheet-${year}-${monthStr}${fileExt}`;
+};
+
 export const uploadTimesheet = async ({ userId, year, month, file }) => {
   if (!file) {
     throw new BadRequestError('Súbor nebol nahraný');
   }
 
+  // Fetch user info for filename generation
+  const [user] = await db
+    .select({ firstName: users.firstName, lastName: users.lastName })
+    .from(users)
+    .where(eq(users.id, userId))
+    .limit(1);
+
   const parsedYear = parseInt(year);
   const parsedMonth = parseInt(month);
   const fileType = detectFileType(file.mimetype);
+  const fileExt = path.extname(file.originalname);
   const { folder, filename, filePath } = buildDestinationPath(userId, parsedYear, parsedMonth, file.originalname);
 
+  // Generate user-friendly filename
+  const displayFileName = generateTimesheetFileName(
+    user?.firstName,
+    user?.lastName,
+    parsedYear,
+    parsedMonth,
+    fileExt
+  );
+
   await fs.mkdir(folder, { recursive: true });
 
   try {
@@ -95,7 +120,7 @@ export const uploadTimesheet = async ({ userId, year, month, file }) => {
       .insert(timesheets)
       .values({
         userId,
-        fileName: file.originalname,
+        fileName: displayFileName,
         filePath,
         fileType,
         fileSize: file.size,