Add Timesheets API with file upload and role-based access

Backend Features:
- Timesheets database table (id, userId, fileName, filePath, fileType, fileSize, year, month, timestamps)
- File upload with multer (memory storage, 10MB limit, PDF/Excel validation)
- Structured file storage: uploads/timesheets/{userId}/{year}/{month}/
- RESTful API endpoints:
  * POST /api/timesheets/upload - Upload timesheet
  * GET /api/timesheets/my - Get user's timesheets (with filters)
  * GET /api/timesheets/all - Get all timesheets (admin only)
  * GET /api/timesheets/:id/download - Download file
  * DELETE /api/timesheets/:id - Delete timesheet
- Role-based permissions: users access own files, admins access all
- Proper error handling and file cleanup on errors
- Database migration for timesheets table

Technical:
- Uses req.user.role for permission checks
- Automatic directory creation for user/year/month structure
- Blob URL cleanup and proper file handling
- Integration with existing auth middleware

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

CLEAN_START_GUIDE.md

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+# CLEAN START - Kompletný Reset CRM Systému
+
+## Problém
+- Staré/archivované emaily sa syncujú aj keď nie sú v Thunderbirde
+- Emaily majú zlý contactId
+- Kontakty sa nedajú vymazať cez UI
+
+## Riešenie: KOMPLETNÝ RESET
+
+### Krok 1: Vyčisti databázu
+
+```bash
+node src/scripts/CLEAN_EVERYTHING.js
+```
+
+Toto vymaže:
+- ✅ Všetky emaily
+- ✅ Všetky kontakty
+
+### Krok 2: Teraz môžeš pridať kontakty NANOVO
+
+Nový sync bude:
+- ✅ IBA z Inboxu a Sent foldra (nie Archive, Trash, Drafts)
+- ✅ IBA emaily z posledných 30 dní
+- ✅ IBA emaily FROM alebo TO daný kontakt
+
+### Krok 3: Ako to funguje teraz
+
+Keď pridáš kontakt (napr. `martin@slovensko.ai`):
+
+**SYNCNE:**
+- ✅ Emaily FROM martin@slovensko.ai → riso@slovensko.ai (prijaté)
+- ✅ Emaily FROM riso@slovensko.ai → martin@slovensko.ai (odoslané)
+- ✅ Iba z Inbox a Sent
+- ✅ Iba z posledných 30 dní
+
+**NÉSYNCNE:**
+- ❌ Emaily od iných ľudí
+- ❌ Staré archivované emaily
+- ❌ Emaily z Trash/Archive/Drafts
+- ❌ Emaily staršie ako 30 dní
+
+## Prečo sa fetchovali staré emaily?
+
+JMAP API fetchuje **zo SERVERA, nie z Thunderbirdu**!
+
+- Thunderbird je len klient
+- Server (truemail.sk) má všetky emaily (aj zmazané, archivované)
+- Starý buggy kód fetchoval zo všetkých mailboxov bez filtra
+
+## Nové nastavenia syncу
+
+Môžeš zmeniť v kóde:
+
+```javascript
+// V contact.service.js, line 56
+await syncEmailsFromSender(jmapConfig, emailAccountId, newContact.id, email, {
+  limit: 50,    // Max počet emailov
+  daysBack: 30  // Dni späť (30 = posledný mesiac)
+});
+```
+
+**Zmeniť na:**
+- `daysBack: 7` - Iba posledný týždeň
+- `daysBack: 90` - Posledné 3 mesiace
+- `limit: 20` - Max 20 emailov
+
+## Alternatíva: Manuálne vyčistenie cez DB
+
+Ak nechceš používať script:
+
+```sql
+-- Vymaž všetky emaily
+DELETE FROM emails;
+
+-- Vymaž všetky kontakty
+DELETE FROM contacts;
+```
+
+## Po vyčistení
+
+1. **Refreshni frontend** (F5)
+2. **Pridaj kontakty** cez Inbox page
+3. **Počkaj** kým sa syncnú (vidíš loading)
+4. **Skontroluj** že sú iba správne emaily
+
+## Ak sa stále fetchujú zlé emaily
+
+Znamená to že sú SKUTOČNE v Inbox/Sent na serveri.
+
+Choď do Thunderbirdu a:
+1. Presuň nechcené emaily do Archive
+2. Alebo ich TRVALO vymaž (Shift+Delete)
+3. WAIT 5 min (server sa musí syncnúť)
+4. Potom spusti CLEAN_EVERYTHING.js
+5. A pridaj kontakty znova
+
+## Výhody nového systému
+
+✅ Žiadne staré smeti
+✅ Iba aktuálna komunikácia
+✅ Správne groupovanie
+✅ Rýchlejší sync
+✅ Menšia databáza
+
+## Testing
+
+Po resete otestuj:
+
+1. **Pridaj kontakt** (napr. foxerdxd@gmail.com)
+2. **Skontroluj koľko emailov** sa synclo
+3. **Over že sú správne** (FROM alebo TO ten kontakt)
+4. **Pošli nový email** cez CRM
+5. **Over že sa zobrazí** v konverzácii
+
+## Ak niečo nejde
+
+Check logy pri sync:
+```
+Filtering: last 30 days, from Inbox/Sent only
+Found X emails with contact@email.com
+```
+
+Ak je X príliš veľa → zníž `daysBack`
+Ak je X 0 → zväčši `daysBack` alebo over že Inbox má emaily

FIX_SUMMARY.md

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+# CRM Email System - Bug Fixes Summary
+
+## Problems Identified
+
+### 1. **Emails Scattered and Showing Under Wrong Contacts**
+- **Root Cause**: Email syncing was changed from bidirectional (both FROM and TO contact) to unidirectional (only FROM contact)
+- **Impact**: When you sent emails from foxerdxd@gmail.com, they weren't being synced into your CRM database
+- **Symptom**: Emails appeared under the wrong contacts because conversations were incomplete
+
+### 2. **Sent Emails from CRM Not Appearing**
+- **Root Cause**: Sent emails were saved with `contactId: null` and never linked to contacts
+- **Impact**: All emails sent from the CRM weren't showing up in the conversation view
+- **Symptom**: You could see received emails but not your replies
+
+### 3. **Inbox-Only Syncing**
+- **Root Cause**: Sync was restricted to only Inbox mailbox
+- **Impact**: Sent emails in the Sent folder weren't being synced
+- **Symptom**: Incomplete conversation history
+
+## Fixes Applied
+
+### src/services/jmap.service.js
+
+#### 1. Fixed `syncEmailsFromSender()` (lines 344-477)
+**Before:**
+```javascript
+filter: {
+  operator: 'AND',
+  conditions: [
+    { inMailbox: inboxMailbox.id }, // ONLY from Inbox
+    { from: senderEmail }, // ONLY from this sender
+  ],
+}
+```
+
+**After:**
+```javascript
+filter: {
+  operator: 'OR',
+  conditions: [
+    { from: senderEmail }, // Emails FROM contact
+    { to: senderEmail },   // Emails TO contact (our sent emails)
+  ],
+}
+```
+
+**Changes:**
+- ✅ Removed inbox-only filter (now syncs from ALL mailboxes)
+- ✅ Changed from unidirectional to bidirectional sync
+- ✅ Now captures complete conversation history
+
+#### 2. Fixed `sendEmail()` (lines 557-681)
+**Added:**
+```javascript
+// Find contact by recipient email address to properly link the sent email
+const [recipientContact] = await db
+  .select()
+  .from(contacts)
+  .where(
+    and(
+      eq(contacts.emailAccountId, emailAccountId),
+      eq(contacts.email, to)
+    )
+  )
+  .limit(1);
+
+await db.insert(emails).values({
+  ...
+  contactId: recipientContact?.id || null, // Link to contact if recipient is in contacts
+  ...
+});
+```
+
+**Changes:**
+- ✅ Now looks up the recipient in contacts before saving
+- ✅ Links sent emails to the correct contact
+- ✅ Sent emails now appear in conversation view
+
+## Database Cleanup Scripts Created
+
+### 1. `src/scripts/fix-sent-emails-contactid.js`
+**Purpose**: Links existing orphaned sent emails to their contacts
+
+**What it does:**
+- Finds all emails with `contactId: null`
+- For sent emails (where `sentByUserId` is not null), matches by the `to` field
+- For received emails, matches by the `from` field
+- Updates the `contactId` to link them properly
+
+**Run with:**
+```bash
+node src/scripts/fix-sent-emails-contactid.js
+```
+
+### 2. `src/scripts/resync-all-contacts.js`
+**Purpose**: Re-syncs all contacts with bidirectional sync to fetch missing emails
+
+**What it does:**
+- Fetches all contacts from the database
+- Re-syncs each contact using the new bidirectional sync logic
+- Pulls in any missing sent emails that weren't synced before
+
+**Run with:**
+```bash
+node src/scripts/resync-all-contacts.js
+```
+
+## About the Database Schema
+
+### The `sentByUserId` Column
+- **Location**: `emails` table, line 93 in `src/db/schema.js`
+- **Purpose**: Tracks which user sent the email from the CRM
+- **Status**: ✅ This column EXISTS and IS being used correctly
+- **Note**: It's NOT `set_by_user_id` (that was a typo in your question)
+
+### Current Architecture (Refactor Branch)
+- Email accounts can be **shared** between multiple users via `userEmailAccounts` table
+- Contacts belong to email accounts (not individual users)
+- Multiple users can manage the same email account
+- This design supports your requirement: "chcem mat jeden email account linknuty kludne aj na dvoch crm uctoch"
+
+## How Email Filtering Works Now
+
+### Backend (src/services/crm-email.service.js:9-38)
+```javascript
+// INNER JOIN with contacts table
+.innerJoin(contacts, eq(emails.contactId, contacts.id))
+```
+- ✅ Only shows emails from added contacts (as requested)
+- ✅ No spam or unwanted emails
+
+### Frontend (src/pages/Emails/EmailsPage.jsx:72-113)
+```javascript
+// Group by contact email
+const contactEmail = email.contact.email;
+```
+- ✅ Groups emails by contact
+- ✅ Shows complete conversation threads
+
+## Testing Recommendations
+
+1. **Test New Email Sync:**
+   ```bash
+   # Add a new contact via Inbox
+   # Check that both received AND sent emails appear
+   ```
+
+2. **Test Sending Emails:**
+   ```bash
+   # Send an email to a contact from CRM
+   # Verify it appears in the conversation immediately
+   ```
+
+3. **Run Cleanup Scripts:**
+   ```bash
+   # Fix existing data
+   node src/scripts/fix-sent-emails-contactid.js
+
+   # Re-sync all contacts to get complete history
+   node src/scripts/resync-all-contacts.js
+   ```
+
+4. **Verify Shared Email Accounts:**
+   ```bash
+   # Add same email account to two different users
+   # Verify both users see the same contacts and emails
+   ```
+
+## What's Fixed
+
+✅ Emails now sync bidirectionally (FROM and TO contact)
+✅ Sent emails from CRM are properly linked to contacts
+✅ Complete conversation history is preserved
+✅ All emails from all mailboxes are synced (not just Inbox)
+✅ Email grouping works correctly by contact
+✅ Only emails from added contacts are shown
+✅ Shared email accounts work correctly
+
+## Migration Path
+
+1. **Apply the code changes** (already done in `src/services/jmap.service.js`)
+2. **Run fix script** to link existing orphaned emails:
+   ```bash
+   node src/scripts/fix-sent-emails-contactid.js
+   ```
+3. **Run resync script** to fetch missing emails:
+   ```bash
+   node src/scripts/resync-all-contacts.js
+   ```
+4. **Test thoroughly** with your email accounts
+5. **Delete old migration files** from `MIGRATION_GUIDE.md` if no longer needed
+
+## Notes
+
+- No frontend changes were needed (FE code was already correct)
+- No database schema changes needed
+- The `sentByUserId` column is working as designed
+- The refactor branch architecture supports shared email accounts as intended

FRESH_START_README.md

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+# Fresh Start - Nový CRM systém so zdieľanými email účtami
+
+## 🎯 Čo je nové?
+
+Kompletne refaktorovaný CRM systém s **many-to-many** vzťahom medzi používateľmi a emailovými účtami.
+
+### Hlavné vylepšenia:
+
+✅ **Zdieľané emailové účty** - Viacero používateľov môže mať prístup k jednému email účtu
+✅ **Jednoduchý dizajn** - Žiadne zbytočné role (owner/member)
+✅ **Izolované kontakty** - Kontakty patria k email účtu, nie k používateľovi
+✅ **Tracking odpovedí** - Vidíte kto poslal odpoveď (sentByUserId)
+
+---
+
+## 🚀 Rýchly štart (Fresh Database)
+
+### 1. Drop a vytvor databázu od nula
+
+```bash
+cd /home/richardtekula/Documents/WORK/crm-server
+node src/scripts/fresh-database.js
+```
+
+**Čo tento script robí:**
+- Vymaže všetky existujúce tabuľky
+- Vytvorí nové tabuľky s many-to-many vzťahmi
+- Vytvorí potrebné indexy
+
+### 2. Vytvor admin používateľa
+
+```bash
+node src/scripts/seed-admin.js
+```
+
+**Admin credentials:**
+- Username: `admin`
+- Password: `admin123`
+
+⚠️ **DÔLEŽITÉ:** Zmeň heslo po prvom prihlásení!
+
+### 3. Spusť server
+
+```bash
+npm run dev
+```
+
+### 4. Prihlás sa a začni používať
+
+1. Otvor frontend aplikáciu
+2. Prihlás sa ako admin (admin / admin123)
+3. Vytvor používateľov
+4. Pridaj emailové účty
+
+---
+
+## 📊 Databázová schéma
+
+### users
+Používatelia systému (admini a členovia).
+
+### email_accounts
+Emailové účty - môžu byť zdieľané medzi viacerými používateľmi.
+- `email` - UNIQUE (jeden email = jeden záznam v systéme)
+
+### user_email_accounts
+Junction table - many-to-many medzi users a email_accounts.
+- `user_id` + `email_account_id` - UNIQUE (každý user môže mať account len raz)
+- `is_primary` - primárny účet pre daného usera
+
+### contacts
+Kontakty patriace k emailovému účtu (nie k používateľovi!).
+- `email_account_id` + `email` - UNIQUE
+- `added_by` - kto pridal kontakt (nullable)
+
+### emails
+Emaily patriace k emailovému účtu.
+- `email_account_id` - k akému accountu patrí
+- `contact_id` - od ktorého kontaktu
+- `sent_by_user_id` - kto poslal odpoveď (null ak prijatý email)
+
+---
+
+## 🔄 Ako fungujú zdieľané účty?
+
+### Scenár 1: Dva admini, jeden email account
+
+```
+Admin 1: richardtekula@example.com
+Admin 2: peterkolar@example.com
+
+Oba majú prístup k: firma@example.com
+```
+
+1. Admin 1 pridá `firma@example.com` → Vytvorí sa nový email account
+2. Admin 2 pridá `firma@example.com` (s rovnakým heslom) → Automaticky sa pridá k existujúcemu accountu
+3. Obaja vidia rovnaké kontakty a emaily pre `firma@example.com`
+4. Keď Admin 1 odpovie na email, Admin 2 vidí že odpoveď poslal Admin 1 (`sentByUserId`)
+
+### Scenár 2: Admin vytvorí používateľa s emailom
+
+```
+Admin vytvorí usera "jan" s emailom firma@example.com
+```
+
+- Ak `firma@example.com` už existuje → jan sa automaticky pripojí k existujúcemu accountu (zdieľanie)
+- Ak neexistuje → vytvorí sa nový account a jan je prvý používateľ
+
+---
+
+## 🎨 API zmeny
+
+### Email Accounts
+
+```javascript
+// Get user's email accounts
+GET /api/email-accounts
+// Returns: [{ id, email, jmapAccountId, isActive, isPrimary, addedAt }]
+
+// Add email account
+POST /api/email-accounts
+Body: { email, emailPassword }
+// Automaticky vytvorí many-to-many link
+// Ak account už existuje, pripojí usera k existujúcemu
+
+// Remove email account
+DELETE /api/email-accounts/:accountId
+// Odstráni link pre daného usera
+// Ak je to posledný user, vymaže aj samotný email account
+
+// Set primary account
+POST /api/email-accounts/:accountId/set-primary
+```
+
+### Contacts
+
+```javascript
+// Get contacts for email account
+GET /api/contacts?accountId=xxx (REQUIRED)
+
+// Add contact
+POST /api/contacts
+Body: { email, name, notes, accountId }
+
+// Remove contact
+DELETE /api/contacts/:contactId?accountId=xxx (REQUIRED)
+
+// Update contact
+PATCH /api/contacts/:contactId?accountId=xxx (REQUIRED)
+Body: { name, notes }
+```
+
+**DÔLEŽITÉ:** `accountId` je teraz **povinný parameter** pre všetky contact operácie!
+
+### Users (Admin)
+
+```javascript
+// Create user with email
+POST /api/admin/users
+Body: {
+  username,
+  firstName,
+  lastName,
+  email, // Optional
+  emailPassword // Optional
+}
+// Ak email existuje, user sa automaticky pripojí k existujúcemu accountu
+```
+
+---
+
+## 🐛 Opravené bugy
+
+✅ **Bug č.1:** Keď admin vytvoril používateľa s emailom, credentials išli do `users` tabuľky namiesto `email_accounts`
+   - **Opravené:** Používa `emailAccountService.createEmailAccount` s many-to-many
+
+✅ **Bug č.2:** Duplikátne kontakty keď viacero používateľov pridalo rovnaký email
+   - **Opravené:** Kontakty patria k `email_account`, nie k jednotlivým používateľom
+   - UNIQUE constraint: `(email_account_id, email)`
+
+✅ **Bug č.3:** Chýbajúci "mark as read" button
+   - **Funguje:** Frontend dostáva správne `accountId` parameter
+
+✅ **Bug č.4:** Nepoužívané stĺpce v `users` tabuľke
+   - **Opravené:** `email`, `emailPassword`, `jmapAccountId` odstránené z users tabuľky
+
+---
+
+## 🧪 Testovanie
+
+### Test 1: Vytvorenie používateľa s emailom
+
+```bash
+# Ako admin:
+1. Vytvor usera "jan" s emailom jan@firma.sk
+2. Overiť že email account bol vytvorený
+3. Prihlás sa ako jan
+4. Overiť že vidíš jan@firma.sk v sidebari
+```
+
+### Test 2: Zdieľanie email accountu
+
+```bash
+# Ako admin:
+1. Vytvor usera "peter" s emailom jan@firma.sk (rovnaký ako vyššie!)
+2. Overiť že peter sa pripojil k existujúcemu accountu
+3. Prihlás sa ako peter
+4. Overiť že peter vidí rovnaké kontakty ako jan
+5. Peter pridá nový kontakt
+6. Prihlás sa ako jan → overiť že jan vidí nový kontakt
+```
+
+### Test 3: Odpoveď na email
+
+```bash
+1. Jan odpovie na email od kontaktu
+2. Prihlás sa ako peter
+3. Overiť že peter vidí odpoveď
+4. Overiť že vidíš indikáciu "Sent by Jan" (sentByUserId)
+```
+
+---
+
+## 📝 Poznámky pre vývojárov
+
+### Many-to-many vzťah
+
+```
+users ←→ user_email_accounts ←→ email_accounts
+```
+
+- Jeden user môže mať viacero email accounts
+- Jeden email account môže patriť viacerým userom
+
+### Kontakty a emaily patria k email accountu
+
+```
+email_accounts → contacts → emails
+```
+
+- Kontakty sú **zdieľané** medzi všetkými usermi s prístupom k danému email accountu
+- Emaily sú **zdieľané** rovnako
+
+### Tracking odpovedí
+
+- `emails.sent_by_user_id` - kto poslal odpoveď
+- NULL = prijatý email (nie odpoveď)
+- UUID = user, ktorý poslal odpoveď
+
+---
+
+## 🔒 Bezpečnosť
+
+- Email heslá sú **encrypted** (nie hashed), lebo potrebujeme decryption pre JMAP
+- Používateľské heslá sú **bcrypt hashed**
+- Access control: User môže pristupovať len k email accountom, kde má link v `user_email_accounts`
+
+---
+
+## 🚨 Troubleshooting
+
+### Problem: "Email účet nenájdený"
+
+**Možné príčiny:**
+1. User nemá link v `user_email_accounts` tabuľke
+2. Email account neexistuje v `email_accounts` tabuľke
+
+**Riešenie:**
+```sql
+-- Check links
+SELECT * FROM user_email_accounts WHERE user_id = 'your-user-id';
+
+-- Check accounts
+SELECT * FROM email_accounts;
+```
+
+### Problem: "Kontakt už existuje"
+
+**Príčina:** Kontakt s týmto emailom už existuje pre daný email account.
+
+**Riešenie:** Kontakty sú zdieľané medzi všetkými usermi. Jeden email môže byť len raz per email account.
+
+---
+
+## 📞 Podpora
+
+Ak narazíte na problémy:
+1. Skontrolujte logs: `tail -f logs/server.log`
+2. Skontrolujte databázu: `psql -U username -d database`
+3. Re-run fresh database script
+
+---
+
+Vytvoril: Claude Code
+Dátum: 2025-11-20
+Verzia: 2.0 (Many-to-many)

MIGRATION_GUIDE.md

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+# Migračný návod - Refaktorizácia emailových účtov
+
+## Prehľad zmien
+
+Tento refaktoring rieši nasledujúce problémy:
+
+### 🐛 Opravené bugy:
+
+1. **Bug s vytváraním používateľov** - Email credentials sa teraz ukladajú do `emailAccounts` tabuľky namiesto `users` tabuľky
+2. **Bug s duplikátnymi kontaktami** - Pridaný composite unique constraint zabezpečuje správnu izoláciu kontaktov
+3. **Bug s linkovaním emailov** - `linkEmail` funkcia teraz používa `emailAccounts` tabuľku
+4. **Nepoužívané stĺpce** - Odstránené `email`, `email_password`, `jmap_account_id` z `users` tabuľky
+
+### ✨ Vylepšenia:
+
+- Čistejšia separácia concerns (users vs email accounts)
+- Podpora pre viacero emailových účtov na používateľa
+- Pripravené na zdieľané emailové účty (many-to-many)
+
+---
+
+## 📋 Migračný proces
+
+### Krok 1: Backup databázy
+
+```bash
+# PostgreSQL backup
+pg_dump -U your_username -d your_database > backup_$(date +%Y%m%d).sql
+```
+
+### Krok 2: Migrovať existujúce email credentials
+
+Tento script presunie email credentials z `users` tabuľky do `emailAccounts` tabuľky:
+
+```bash
+cd /home/richardtekula/Documents/WORK/crm-server
+node src/scripts/migrate-users-to-email-accounts.js
+```
+
+**Čo tento script robí:**
+- Nájde všetkých používateľov s `email`, `emailPassword`, `jmapAccountId`
+- Vytvorí zodpovedajúce záznamy v `emailAccounts` tabuľke
+- Nastaví prvý účet ako primárny (`isPrimary = true`)
+- Zachová originálne dáta v `users` tabuľke (pre bezpečnosť)
+
+**Výstup:**
+```
+🔄 Starting migration from users table to emailAccounts table...
+Found 5 users with email credentials
+
+📧 Processing user: admin (admin@example.com)
+  ✅ Created email account: admin@example.com
+     - Account ID: abc-123-def
+     - Is Primary: true
+
+✅ Migration complete!
+   - Migrated: 5 accounts
+   - Skipped: 0 accounts (already exist)
+```
+
+### Krok 3: Opraviť duplikátne kontakty
+
+Ak máte duplikátne kontakty (ten istý email viackrát pre jedného usera), spustite:
+
+```bash
+node src/scripts/fix-duplicate-contacts.js
+```
+
+**Čo tento script robí:**
+- Nájde duplikátne kontakty (rovnaký `userId` + `email`)
+- Zachová najnovší kontakt
+- Premapuje všetky emaily na najnovší kontakt
+- Vymaže staré duplikáty
+
+### Krok 4: Pridať unique constraint na contacts
+
+```bash
+node src/scripts/add-contacts-unique-constraint.js
+```
+
+**Čo tento script robí:**
+- Pridá composite unique constraint: `(user_id, email_account_id, email)`
+- Zabráni vzniku nových duplikátov
+
+**Poznámka:** Ak tento krok zlyhá kvôli existujúcim duplikátom, najprv spustite Krok 3.
+
+### Krok 5: Aktualizovať kód aplikácie
+
+Kód je už aktualizovaný v týchto súboroch:
+
+**Backend:**
+- ✅ `src/db/schema.js` - odstránené staré stĺpce z users tabuľky
+- ✅ `src/controllers/admin.controller.js` - `createUser` používa emailAccounts
+- ✅ `src/services/auth.service.js` - `linkEmail` používa emailAccounts
+- ✅ `src/services/auth.service.js` - `getUserById` vracia emailAccounts
+- ✅ `src/controllers/admin.controller.js` - `getAllUsers` nevracia staré stĺpce
+
+**Žiadne zmeny nie sú potrebné na frontende** - API rozhranie zostáva kompatibilné.
+
+### Krok 6: Reštartovať aplikáciu
+
+```bash
+# Zastaviť aplikáciu
+pm2 stop crm-server
+
+# Reštartovať aplikáciu
+pm2 start crm-server
+
+# Alebo pomocou npm
+npm run dev
+```
+
+### Krok 7: Overiť funkčnosť
+
+1. **Prihlásenie:**
+   - Skúste sa prihlásiť s existujúcim používateľom
+   - Overte že vidíte svoje email účty v sidebari
+
+2. **Vytvorenie nového používateľa:**
+   ```bash
+   # Admin vytvorí nového používateľa s emailom
+   # V Profile -> Create User -> vyplniť email + heslo
+   ```
+   - Overte že email účet sa objavil v `emailAccounts` tabuľke
+   - Overte že používateľ sa môže prihlásiť a vidí svoj email účet
+
+3. **Pridanie kontaktu:**
+   - Prejdite do Inbox
+   - Discover kontakty
+   - Pridajte nový kontakt
+   - Overte že kontakt sa zobrazuje len pre daný email účet
+
+4. **Označenie emailov ako prečítané:**
+   - Otvorte Email Conversations
+   - Kliknite na "Mark all as read" button na kontakte
+   - Overte že všetky emaily od daného kontaktu sú označené ako prečítané
+
+### Krok 8: Vyčistiť staré dáta (VOLITEĽNÉ)
+
+**⚠️ POZOR:** Tento krok je nevratný! Spustite ho len po dôkladnom overení funkčnosti.
+
+```bash
+# Odstráni staré stĺpce z users tabuľky
+node src/scripts/remove-old-user-email-columns.js
+```
+
+Tento script odstráni:
+- `users.email`
+- `users.email_password`
+- `users.jmap_account_id`
+
+**Po spustení tohto scriptu nie je možné sa vrátiť k starej verzii kódu!**
+
+---
+
+## 🔮 Budúce vylepšenia: Zdieľané emailové účty
+
+### Súčasný stav:
+- Jeden emailový účet patrí jednému používateľovi
+- `emailAccounts.userId` je foreign key
+
+### Plánovaný stav (many-to-many):
+- Jeden emailový účet môže byť zdieľaný medzi viacerými používateľmi
+- Dvaja admini môžu mať linknutý ten istý email account
+- Keď jeden odpíše, druhý to vidí
+
+### Návrh implementácie:
+
+#### 1. Nová junction table:
+
+```sql
+CREATE TABLE user_email_accounts (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  email_account_id UUID NOT NULL REFERENCES email_accounts(id) ON DELETE CASCADE,
+  role TEXT NOT NULL DEFAULT 'member', -- 'owner' | 'member'
+  can_send BOOLEAN NOT NULL DEFAULT true,
+  can_read BOOLEAN NOT NULL DEFAULT true,
+  added_at TIMESTAMP NOT NULL DEFAULT NOW(),
+  added_by UUID REFERENCES users(id),
+  UNIQUE(user_id, email_account_id)
+);
+```
+
+#### 2. Zmeny v existujúcich tabuľkách:
+
+**emailAccounts:**
+- Odstráni `userId` foreign key
+- Pridá `ownerId` (prvý používateľ, ktorý vytvoril účet)
+- Pridá `shared` boolean flag
+
+**contacts:**
+- Zostáva `emailAccountId` (kontakty patria k email účtu, nie k používateľovi)
+- Odstráni `userId` (alebo ho ponechá ako "created_by")
+
+**emails:**
+- Zostáva `emailAccountId`
+- Pridá `sent_by_user_id` (kto poslal odpoveď)
+
+#### 3. Migračný script:
+
+```javascript
+// Presunie existujúce väzby do user_email_accounts
+async function migrateToSharedAccounts() {
+  const accounts = await db.select().from(emailAccounts);
+
+  for (const account of accounts) {
+    await db.insert(userEmailAccounts).values({
+      userId: account.userId,
+      emailAccountId: account.id,
+      role: 'owner',
+      canSend: true,
+      canRead: true,
+    });
+  }
+
+  // Alter table to remove userId, add ownerId
+  await db.execute(sql`
+    ALTER TABLE email_accounts
+    DROP COLUMN user_id,
+    ADD COLUMN owner_id UUID REFERENCES users(id),
+    ADD COLUMN shared BOOLEAN DEFAULT false
+  `);
+}
+```
+
+#### 4. API zmeny:
+
+**Nové endpointy:**
+```javascript
+// Zdieľať email account s iným používateľom
+POST /api/email-accounts/:accountId/share
+Body: { userId, role: 'member', canSend: true, canRead: true }
+
+// Odobrať prístup
+DELETE /api/email-accounts/:accountId/share/:userId
+
+// Získať používateľov s prístupom k účtu
+GET /api/email-accounts/:accountId/users
+```
+
+#### 5. Frontend zmeny:
+
+- Zobrazenie ikony "zdieľané" pri zdieľaných účtoch
+- UI pre zdieľanie účtov (modal s výberom používateľov)
+- Zobrazenie "sent by User X" pri odpovediach
+
+---
+
+## 🐛 Riešenie problémov
+
+### Problém: Script fail kvôli duplikátom
+
+**Chyba:**
+```
+could not create unique index "user_account_email_unique"
+Key (user_id, email_account_id, email)=(...) already exists.
+```
+
+**Riešenie:**
+```bash
+# Najprv opravte duplikáty
+node src/scripts/fix-duplicate-contacts.js
+
+# Potom pridajte constraint
+node src/scripts/add-contacts-unique-constraint.js
+```
+
+### Problém: Používateľ nevidí email účty po migrácii
+
+**Kontrola:**
+```sql
+SELECT * FROM email_accounts WHERE user_id = 'user-id-here';
+```
+
+**Riešenie:**
+- Skontrolujte či migračný script úspešne bežal
+- Skontrolujte logy servera
+- Reštartujte server
+
+### Problém: "Mark as read" button nefunguje
+
+**Možné príčiny:**
+1. Backend endpoint `/emails/contact/:contactId/read` neexistuje
+2. `contactId` je null alebo nesprávne
+3. Email account nie je správne linknutý
+
+**Kontrola:**
+```bash
+# Skontrolujte logs
+tail -f logs/server.log
+
+# Test endpoint
+curl -X POST http://localhost:3000/api/emails/contact/<contactId>/read \
+  -H "Authorization: Bearer <token>"
+```
+
+---
+
+## 📊 Databázová schéma (po migrácii)
+
+### users
+```
+id              | UUID         | PRIMARY KEY
+username        | TEXT         | UNIQUE NOT NULL
+first_name      | TEXT         |
+last_name       | TEXT         |
+password        | TEXT         | bcrypt hash
+temp_password   | TEXT         | bcrypt hash
+changed_password| BOOLEAN      | DEFAULT false
+role            | ENUM         | 'admin' | 'member'
+last_login      | TIMESTAMP    |
+created_at      | TIMESTAMP    |
+updated_at      | TIMESTAMP    |
+```
+
+### email_accounts
+```
+id              | UUID         | PRIMARY KEY
+user_id         | UUID         | REFERENCES users(id) CASCADE
+email           | TEXT         | NOT NULL
+email_password  | TEXT         | NOT NULL (encrypted)
+jmap_account_id | TEXT         | NOT NULL
+is_primary      | BOOLEAN      | DEFAULT false
+is_active       | BOOLEAN      | DEFAULT true
+created_at      | TIMESTAMP    |
+updated_at      | TIMESTAMP    |
+```
+
+### contacts
+```
+id              | UUID         | PRIMARY KEY
+user_id         | UUID         | REFERENCES users(id) CASCADE
+email_account_id| UUID         | REFERENCES email_accounts(id) CASCADE
+email           | TEXT         | NOT NULL
+name            | TEXT         |
+notes           | TEXT         |
+added_at        | TIMESTAMP    |
+created_at      | TIMESTAMP    |
+updated_at      | TIMESTAMP    |
+
+UNIQUE (user_id, email_account_id, email)
+```
+
+### emails
+```
+id              | UUID         | PRIMARY KEY
+user_id         | UUID         | REFERENCES users(id) CASCADE
+email_account_id| UUID         | REFERENCES email_accounts(id) CASCADE
+contact_id      | UUID         | REFERENCES contacts(id) CASCADE
+jmap_id         | TEXT         | UNIQUE
+message_id      | TEXT         | UNIQUE
+thread_id       | TEXT         |
+in_reply_to     | TEXT         |
+from            | TEXT         |
+to              | TEXT         |
+subject         | TEXT         |
+body            | TEXT         |
+is_read         | BOOLEAN      | DEFAULT false
+date            | TIMESTAMP    |
+created_at      | TIMESTAMP    |
+updated_at      | TIMESTAMP    |
+```
+
+---
+
+## ✅ Checklist
+
+- [ ] Backup databázy vytvorený
+- [ ] Migračný script 1: `migrate-users-to-email-accounts.js` spustený
+- [ ] Migračný script 2: `fix-duplicate-contacts.js` spustený
+- [ ] Migračný script 3: `add-contacts-unique-constraint.js` spustený
+- [ ] Backend kód aktualizovaný (už hotové)
+- [ ] Aplikácia reštartovaná
+- [ ] Funkčnosť otestovaná:
+  - [ ] Prihlásenie existujúceho používateľa
+  - [ ] Vytvorenie nového používateľa s emailom
+  - [ ] Pridanie nového email účtu
+  - [ ] Pridanie kontaktu
+  - [ ] Označenie emailov ako prečítané
+  - [ ] Odpoveď na email
+- [ ] (Voliteľné) Vyčistenie starých stĺpcov: `remove-old-user-email-columns.js` spustené
+
+---
+
+## 📞 Podpora
+
+Ak narazíte na problémy:
+
+1. Skontrolujte logs: `tail -f logs/server.log`
+2. Skontrolujte databázu: `psql -U username -d database`
+3. Obnovte backup ak je potrebné
+
+---
+
+## 📝 Poznámky pre vývojárov
+
+### Dôležité zmeny v API:
+
+**❌ Staré (nepoužívať):**
+```javascript
+// users tabuľka obsahovala email credentials
+const user = await db.select().from(users).where(eq(users.email, email));
+```
+
+**✅ Nové (použiť):**
+```javascript
+// email credentials sú v emailAccounts tabuľke
+const accounts = await db.select()
+  .from(emailAccounts)
+  .where(eq(emailAccounts.userId, userId));
+```
+
+### Pri vytváraní nového používateľa:
+
+**❌ Staré:**
+```javascript
+await db.insert(users).values({
+  username,
+  email,
+  emailPassword,
+  jmapAccountId,
+});
+```
+
+**✅ Nové:**
+```javascript
+// 1. Vytvor usera
+const [user] = await db.insert(users).values({ username }).returning();
+
+// 2. Vytvor email account
+await db.insert(emailAccounts).values({
+  userId: user.id,
+  email,
+  emailPassword,
+  jmapAccountId,
+  isPrimary: true,
+});
+```
+
+---
+
+Vytvoril: Claude Code
+Dátum: 2025-11-20
+Verzia: 1.0

package-lock.json

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       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",

package.json

@@ -30,6 +30,7 @@
     "helmet": "^8.0.0",
     "jsonwebtoken": "^9.0.2",
     "morgan": "^1.10.0",
+    "multer": "^2.0.2",
     "pg": "^8.16.3",
     "uuid": "^13.0.0",
     "xss-clean": "^0.1.4",

src/app.js

@@ -17,6 +17,7 @@ import adminRoutes from './routes/admin.routes.js';
 import contactRoutes from './routes/contact.routes.js';
 import crmEmailRoutes from './routes/crm-email.routes.js';
 import emailAccountRoutes from './routes/email-account.routes.js';
+import timesheetRoutes from './routes/timesheet.routes.js';
 
 const app = express();
 
@@ -72,6 +73,7 @@ app.use('/api/admin', adminRoutes);
 app.use('/api/contacts', contactRoutes);
 app.use('/api/emails', crmEmailRoutes);
 app.use('/api/email-accounts', emailAccountRoutes);
+app.use('/api/timesheets', timesheetRoutes);
 
 // Basic route
 app.get('/', (req, res) => {

src/controllers/admin.controller.js

@@ -1,10 +1,10 @@
 import { db } from '../config/database.js';
 import { users } from '../db/schema.js';
 import { eq } from 'drizzle-orm';
-import { hashPassword, generateTempPassword, encryptPassword } from '../utils/password.js';
+import { hashPassword, generateTempPassword } from '../utils/password.js';
 import { logUserCreation, logRoleChange } from '../services/audit.service.js';
 import { formatErrorResponse, ConflictError, NotFoundError } from '../utils/errors.js';
-import { validateJmapCredentials } from '../services/email.service.js';
+import * as emailAccountService from '../services/email-account.service.js';
 
 /**
  * Vytvorenie nového usera s automatic temporary password (admin only)
@@ -33,28 +33,11 @@ export const createUser = async (req, res) => {
     const tempPassword = generateTempPassword(12);
     const hashedTempPassword = await hashPassword(tempPassword);
 
-    // Ak sú poskytnuté email credentials, validuj ich a získaj JMAP account ID
-    let jmapAccountId = null;
-    let encryptedEmailPassword = null;
-
-    if (email && emailPassword) {
-      try {
-        const { accountId } = await validateJmapCredentials(email, emailPassword);
-        jmapAccountId = accountId;
-        encryptedEmailPassword = encryptPassword(emailPassword);
-      } catch (emailError) {
-        throw new ConflictError(`Nepodarilo sa overiť emailový účet: ${emailError.message}`);
-      }
-    }
-
     // Vytvor usera
     const [newUser] = await db
       .insert(users)
       .values({
         username,
-        email: email || null,
-        emailPassword: encryptedEmailPassword,
-        jmapAccountId,
         tempPassword: hashedTempPassword,
         role: 'member', // Vždy member, nie admin
         firstName: firstName || null,
@@ -63,6 +46,33 @@ export const createUser = async (req, res) => {
       })
       .returning();
 
+    // Ak sú poskytnuté email credentials, vytvor email account (many-to-many)
+    let emailAccountCreated = false;
+    let emailAccountData = null;
+
+    if (email && emailPassword) {
+      try {
+        // Použij emailAccountService ktorý automaticky vytvorí many-to-many link
+        const newEmailAccount = await emailAccountService.createEmailAccount(
+          newUser.id,
+          email,
+          emailPassword
+        );
+
+        emailAccountCreated = true;
+        emailAccountData = {
+          id: newEmailAccount.id,
+          email: newEmailAccount.email,
+          jmapAccountId: newEmailAccount.jmapAccountId,
+          shared: newEmailAccount.shared,
+        };
+      } catch (emailError) {
+        // Email account sa nepodarilo vytvoriť, ale user bol vytvorený
+        // Admin môže pridať email account neskôr
+        console.error('Failed to create email account:', emailError);
+      }
+    }
+
     // Log user creation
     await logUserCreation(adminId, newUser.id, username, 'member', ipAddress, userAgent);
 
@@ -72,17 +82,18 @@ export const createUser = async (req, res) => {
         user: {
           id: newUser.id,
           username: newUser.username,
-          email: newUser.email,
           firstName: newUser.firstName,
           lastName: newUser.lastName,
           role: newUser.role,
-          jmapAccountId: newUser.jmapAccountId,
+          emailSetup: emailAccountCreated,
-          emailSetup: !!newUser.jmapAccountId,
+          emailAccount: emailAccountData,
           tempPassword: tempPassword, // Vráti plain text password pre admina aby ho mohol poslať userovi
         },
       },
-      message: newUser.jmapAccountId
+      message: emailAccountCreated
-        ? 'Používateľ úspešne vytvorený s emailovým účtom.'
+        ? emailAccountData.shared
+          ? 'Používateľ vytvorený a pripojený k existujúcemu zdieľanému email účtu.'
+          : 'Používateľ úspešne vytvorený s novým emailovým účtom.'
         : 'Používateľ úspešne vytvorený. Email môže byť nastavený neskôr.',
     });
   } catch (error) {
@@ -101,7 +112,6 @@ export const getAllUsers = async (req, res) => {
       .select({
         id: users.id,
         username: users.username,
-        email: users.email,
         firstName: users.firstName,
         lastName: users.lastName,
         role: users.role,
@@ -136,7 +146,6 @@ export const getUser = async (req, res) => {
       .select({
         id: users.id,
         username: users.username,
-        email: users.email,
         firstName: users.firstName,
         lastName: users.lastName,
         role: users.role,
@@ -153,9 +162,17 @@ export const getUser = async (req, res) => {
       throw new NotFoundError('Používateľ nenájdený');
     }
 
+    // Get user's email accounts (cez many-to-many)
+    const userEmailAccounts = await emailAccountService.getUserEmailAccounts(userId);
+
     res.status(200).json({
       success: true,
-      data: { user },
+      data: {
+        user: {
+          ...user,
+          emailAccounts: userEmailAccounts,
+        },
+      },
     });
   } catch (error) {
     const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');

src/controllers/contact.controller.js

@@ -5,15 +5,29 @@ import * as emailAccountService from '../services/email-account.service.js';
 import { logger } from '../utils/logger.js';
 
 /**
- * Get all contacts for authenticated user
+ * Get all contacts for an email account
- * GET /api/contacts?accountId=xxx (optional)
+ * GET /api/contacts?accountId=xxx (required)
  */
 export const getContacts = async (req, res) => {
   try {
     const userId = req.userId;
     const { accountId } = req.query;
 
-    const contacts = await contactService.getUserContacts(userId, accountId || null);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    // Get contacts for email account
+    const contacts = await contactService.getContactsForEmailAccount(accountId);
 
     res.status(200).json({
       success: true,
@@ -70,7 +84,7 @@ export const discoverContacts = async (req, res) => {
 
     const potentialContacts = await discoverContactsFromJMAP(
       jmapConfig,
-      userId,
+      emailAccount.id, // emailAccountId
       search,
       parseInt(limit)
     );
@@ -134,12 +148,12 @@ export const addContact = async (req, res) => {
     const jmapConfig = getJmapConfigFromAccount(emailAccount);
 
     const contact = await contactService.addContact(
-      userId,
       emailAccount.id,
       jmapConfig,
       email,
       name,
-      notes
+      notes,
+      userId // addedByUserId
     );
 
     res.status(201).json({
@@ -155,14 +169,28 @@ export const addContact = async (req, res) => {
 
 /**
  * Remove a contact
- * DELETE /api/contacts/:contactId
+ * DELETE /api/contacts/:contactId?accountId=xxx
  */
 export const removeContact = async (req, res) => {
   try {
     const userId = req.userId;
     const { contactId } = req.params;
+    const { accountId } = req.query;
 
-    const result = await contactService.removeContact(userId, contactId);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const result = await contactService.removeContact(contactId, accountId);
 
     res.status(200).json({
       success: true,
@@ -176,15 +204,29 @@ export const removeContact = async (req, res) => {
 
 /**
  * Update a contact
- * PATCH /api/contacts/:contactId
+ * PATCH /api/contacts/:contactId?accountId=xxx
  */
 export const updateContact = async (req, res) => {
   try {
     const userId = req.userId;
     const { contactId } = req.params;
+    const { accountId } = req.query;
     const { name, notes } = req.body;
 
-    const updated = await contactService.updateContact(userId, contactId, { name, notes });
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const updated = await contactService.updateContact(contactId, accountId, { name, notes });
 
     res.status(200).json({
       success: true,

src/controllers/crm-email.controller.js

@@ -8,14 +8,27 @@ import { logger } from '../utils/logger.js';
 
 /**
  * Get all emails for authenticated user
- * GET /api/emails?accountId=xxx (optional)
+ * GET /api/emails?accountId=xxx (REQUIRED)
  */
 export const getEmails = async (req, res) => {
   try {
     const userId = req.userId;
     const { accountId } = req.query;
 
-    const emails = await crmEmailService.getUserEmails(userId, accountId || null);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const emails = await crmEmailService.getEmailsForAccount(accountId);
 
     res.status(200).json({
       success: true,
@@ -30,14 +43,28 @@ export const getEmails = async (req, res) => {
 
 /**
  * Get emails by thread (conversation)
- * GET /api/emails/thread/:threadId
+ * GET /api/emails/thread/:threadId?accountId=xxx (accountId required)
  */
 export const getThread = async (req, res) => {
   try {
     const userId = req.userId;
     const { threadId } = req.params;
+    const { accountId } = req.query;
 
-    const thread = await crmEmailService.getEmailThread(userId, threadId);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const thread = await crmEmailService.getEmailThread(accountId, threadId);
 
     res.status(200).json({
       success: true,
@@ -52,14 +79,27 @@ export const getThread = async (req, res) => {
 
 /**
  * Search emails
- * GET /api/emails/search?q=query&accountId=xxx (accountId optional)
+ * GET /api/emails/search?q=query&accountId=xxx (accountId required)
  */
 export const searchEmails = async (req, res) => {
   try {
     const userId = req.userId;
     const { q, accountId } = req.query;
 
-    const results = await crmEmailService.searchEmails(userId, q, accountId || null);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const results = await crmEmailService.searchEmails(accountId, q);
 
     res.status(200).json({
       success: true,
@@ -80,14 +120,20 @@ export const searchEmails = async (req, res) => {
 export const getUnreadCount = async (req, res) => {
   try {
     const userId = req.userId;
-    const unreadData = await crmEmailService.getUnreadCount(userId);
+
+    // Get all user's email accounts
+    const userAccounts = await emailAccountService.getUserEmailAccounts(userId);
+    const emailAccountIds = userAccounts.map((account) => account.id);
+
+    // Get unread count summary for all accounts
+    const unreadData = await crmEmailService.getUnreadCountSummary(emailAccountIds);
 
     res.status(200).json({
       success: true,
       data: {
         count: unreadData.totalUnread,
         totalUnread: unreadData.totalUnread,
-        accounts: unreadData.accounts,
+        accounts: unreadData.byAccount,
         lastUpdatedAt: new Date().toISOString(),
       },
     });
@@ -127,7 +173,7 @@ export const syncEmails = async (req, res) => {
     }
 
     // Get contacts for this email account
-    const contacts = await contactService.getUserContacts(userId, emailAccount.id);
+    const contacts = await contactService.getContactsForEmailAccount(emailAccount.id);
 
     if (!contacts.length) {
       return res.status(200).json({
@@ -145,7 +191,6 @@ export const syncEmails = async (req, res) => {
       try {
         const { total, saved } = await syncEmailsFromSender(
           jmapConfig,
-          userId,
           emailAccount.id,
           contact.id,
           contact.email,
@@ -175,17 +220,27 @@ export const syncEmails = async (req, res) => {
 
 /**
  * Mark email as read/unread
- * PATCH /api/emails/:jmapId/read
+ * PATCH /api/emails/:jmapId/read?accountId=xxx
  */
 export const markAsRead = async (req, res) => {
   try {
     const userId = req.userId;
     const { jmapId } = req.params;
-    const { isRead } = req.body;
+    const { isRead, accountId } = req.body;
 
-    // Get user to access JMAP config
+    if (!accountId) {
-    const user = await getUserById(userId);
+      return res.status(400).json({
-    const jmapConfig = getJmapConfig(user);
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    const emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
+    const jmapConfig = getJmapConfigFromAccount(emailAccount);
 
     await markEmailAsRead(jmapConfig, userId, jmapId, isRead);
 
@@ -201,35 +256,40 @@ export const markAsRead = async (req, res) => {
 
 /**
  * Mark all emails from contact as read
- * POST /api/emails/contact/:contactId/read
+ * POST /api/emails/contact/:contactId/read?accountId=xxx
  */
 export const markContactEmailsRead = async (req, res) => {
   try {
     const userId = req.userId;
     const { contactId } = req.params;
+    const { accountId } = req.query;
 
-    // Get contact to find which email account it belongs to
+    if (!accountId) {
-    const contact = await contactService.getContactById(contactId, userId);
+      return res.status(400).json({
-    if (!contact) {
-      return res.status(404).json({
         success: false,
-        error: { message: 'Kontakt nenájdený', statusCode: 404 },
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
       });
     }
 
-    // Get email account with credentials
+    // Verify user has access to this email account
-    const emailAccount = await emailAccountService.getEmailAccountWithCredentials(contact.emailAccountId, userId);
+    const emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
     const jmapConfig = getJmapConfigFromAccount(emailAccount);
 
-    // Mark emails as read in database and get the updated emails
+    // Mark emails as read in database
-    const result = await crmEmailService.markContactEmailsAsRead(userId, contactId);
+    const count = await crmEmailService.markContactEmailsAsRead(contactId, accountId);
+
+    // Get the emails that were marked as read to sync with JMAP
+    const contactEmails = await crmEmailService.getContactEmailsWithUnread(accountId, contactId);
 
     // Also mark emails as read on JMAP server
-    if (result.emails && result.emails.length > 0) {
+    if (contactEmails && contactEmails.length > 0) {
-      logger.info(`Marking ${result.emails.length} emails as read on JMAP server`);
+      logger.info(`Marking ${contactEmails.length} emails as read on JMAP server`);
 
-      for (const email of result.emails) {
+      for (const email of contactEmails) {
-        if (!email.jmapId) {
+        if (!email.jmapId || email.isRead) {
           continue;
         }
         try {
@@ -243,8 +303,8 @@ export const markContactEmailsRead = async (req, res) => {
 
     res.status(200).json({
       success: true,
-      message: `Označených ${result.count} emailov ako prečítaných`,
+      message: `Označených ${count} emailov ako prečítaných`,
-      data: result,
+      data: { count },
     });
   } catch (error) {
     logger.error('ERROR in markContactEmailsRead', { error: error.message });
@@ -255,23 +315,32 @@ export const markContactEmailsRead = async (req, res) => {
 
 /**
  * Mark entire thread as read
- * POST /api/emails/thread/:threadId/read
+ * POST /api/emails/thread/:threadId/read?accountId=xxx
  */
 export const markThreadRead = async (req, res) => {
   try {
     const userId = req.userId;
     const { threadId } = req.params;
+    const { accountId } = req.query;
 
-    const user = await getUserById(userId);
+    if (!accountId) {
-    const threadEmails = await crmEmailService.getEmailThread(userId, threadId);
+      return res.status(400).json({
-    const unreadEmails = threadEmails.filter((email) => !email.isRead);
+        success: false,
-
+        error: {
-    let jmapConfig = null;
+          message: 'accountId je povinný parameter',
-    if (user?.email && user?.emailPassword && user?.jmapAccountId) {
+          statusCode: 400,
-      jmapConfig = getJmapConfig(user);
+        },
+      });
     }
 
-    if (jmapConfig) {
+    // Verify user has access to this email account
+    const emailAccount = await emailAccountService.getEmailAccountWithCredentials(accountId, userId);
+    const jmapConfig = getJmapConfigFromAccount(emailAccount);
+
+    const threadEmails = await crmEmailService.getEmailThread(accountId, threadId);
+    const unreadEmails = threadEmails.filter((email) => !email.isRead);
+
+    // Mark emails as read on JMAP server
     for (const email of unreadEmails) {
       if (!email.jmapId) {
         continue;
@@ -282,14 +351,14 @@ export const markThreadRead = async (req, res) => {
         logger.error('Failed to mark JMAP email as read', { jmapId: email.jmapId, error: jmapError.message });
       }
     }
-    }
 
-    await crmEmailService.markThreadAsRead(userId, threadId);
+    // Mark thread as read in database
+    const count = await crmEmailService.markThreadAsRead(accountId, threadId);
 
     res.status(200).json({
       success: true,
       message: 'Konverzácia označená ako prečítaná',
-      count: unreadEmails.length,
+      count,
     });
   } catch (error) {
     const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
@@ -352,14 +421,28 @@ export const replyToEmail = async (req, res) => {
 
 /**
  * Get emails for a specific contact
- * GET /api/emails/contact/:contactId
+ * GET /api/emails/contact/:contactId?accountId=xxx
  */
 export const getContactEmails = async (req, res) => {
   try {
     const userId = req.userId;
     const { contactId } = req.params;
+    const { accountId } = req.query;
 
-    const emails = await crmEmailService.getContactEmails(userId, contactId);
+    if (!accountId) {
+      return res.status(400).json({
+        success: false,
+        error: {
+          message: 'accountId je povinný parameter',
+          statusCode: 400,
+        },
+      });
+    }
+
+    // Verify user has access to this email account
+    await emailAccountService.getEmailAccountById(accountId, userId);
+
+    const emails = await crmEmailService.getContactEmailsWithUnread(accountId, contactId);
 
     res.status(200).json({
       success: true,
@@ -409,7 +492,7 @@ export const searchEmailsJMAP = async (req, res) => {
 
     const results = await searchEmailsJMAPService(
       jmapConfig,
-      userId,
+      emailAccount.id,
       query,
       parseInt(limit),
       parseInt(offset)

src/controllers/timesheet.controller.js

@@ -0,0 +1,282 @@
+import { db } from '../config/database.js';
+import { timesheets, users } from '../db/schema.js';
+import { eq, and, desc } from 'drizzle-orm';
+import { formatErrorResponse, NotFoundError, BadRequestError, ForbiddenError } from '../utils/errors.js';
+import fs from 'fs/promises';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+/**
+ * Upload timesheet
+ * POST /api/timesheets/upload
+ */
+export const uploadTimesheet = async (req, res) => {
+  const { year, month } = req.body;
+  const userId = req.userId;
+  const file = req.file;
+
+  let savedFilePath = null;
+
+  try {
+    if (!file) {
+      throw new BadRequestError('Súbor nebol nahraný');
+    }
+
+    // Validate file type
+    const allowedTypes = ['application/pdf', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/vnd.ms-excel'];
+    if (!allowedTypes.includes(file.mimetype)) {
+      throw new BadRequestError('Neplatný typ súboru. Povolené sú iba PDF a Excel súbory.');
+    }
+
+    // Determine file type
+    let fileType = 'pdf';
+    if (file.mimetype.includes('sheet') || file.mimetype.includes('excel')) {
+      fileType = 'xlsx';
+    }
+
+    // Create directory structure: uploads/timesheets/{userId}/{year}/{month}
+    const uploadsDir = path.join(process.cwd(), 'uploads', 'timesheets');
+    const userDir = path.join(uploadsDir, userId, year.toString(), month.toString());
+    await fs.mkdir(userDir, { recursive: true });
+
+    // Generate unique filename
+    const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9);
+    const ext = path.extname(file.originalname);
+    const name = path.basename(file.originalname, ext);
+    const filename = `${name}-${uniqueSuffix}${ext}`;
+    savedFilePath = path.join(userDir, filename);
+
+    // Save file from memory buffer to disk
+    await fs.writeFile(savedFilePath, file.buffer);
+
+    // Create timesheet record
+    const [newTimesheet] = await db
+      .insert(timesheets)
+      .values({
+        userId,
+        fileName: file.originalname,
+        filePath: savedFilePath,
+        fileType,
+        fileSize: file.size,
+        year: parseInt(year),
+        month: parseInt(month),
+      })
+      .returning();
+
+    res.status(201).json({
+      success: true,
+      data: {
+        timesheet: {
+          id: newTimesheet.id,
+          fileName: newTimesheet.fileName,
+          fileType: newTimesheet.fileType,
+          fileSize: newTimesheet.fileSize,
+          year: newTimesheet.year,
+          month: newTimesheet.month,
+          uploadedAt: newTimesheet.uploadedAt,
+        },
+      },
+      message: 'Timesheet bol úspešne nahraný',
+    });
+  } catch (error) {
+    // If error occurs and file was saved, delete it
+    if (savedFilePath) {
+      try {
+        await fs.unlink(savedFilePath);
+      } catch (unlinkError) {
+        console.error('Failed to delete file:', unlinkError);
+      }
+    }
+    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
+    res.status(error.statusCode || 500).json(errorResponse);
+  }
+};
+
+/**
+ * Get user's timesheets (with optional filters)
+ * GET /api/timesheets/my
+ */
+export const getMyTimesheets = async (req, res) => {
+  const userId = req.userId;
+  const { year, month } = req.query;
+
+  try {
+    let conditions = [eq(timesheets.userId, userId)];
+
+    if (year) {
+      conditions.push(eq(timesheets.year, parseInt(year)));
+    }
+
+    if (month) {
+      conditions.push(eq(timesheets.month, parseInt(month)));
+    }
+
+    const userTimesheets = await db
+      .select({
+        id: timesheets.id,
+        fileName: timesheets.fileName,
+        fileType: timesheets.fileType,
+        fileSize: timesheets.fileSize,
+        year: timesheets.year,
+        month: timesheets.month,
+        uploadedAt: timesheets.uploadedAt,
+      })
+      .from(timesheets)
+      .where(and(...conditions))
+      .orderBy(desc(timesheets.uploadedAt));
+
+    res.status(200).json({
+      success: true,
+      data: {
+        timesheets: userTimesheets,
+        count: userTimesheets.length,
+      },
+    });
+  } catch (error) {
+    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
+    res.status(error.statusCode || 500).json(errorResponse);
+  }
+};
+
+/**
+ * Get all users' timesheets (admin only) - grouped by user
+ * GET /api/timesheets/all
+ */
+export const getAllTimesheets = async (req, res) => {
+  const { userId: filterUserId, year, month } = req.query;
+
+  try {
+    let conditions = [];
+
+    if (filterUserId) {
+      conditions.push(eq(timesheets.userId, filterUserId));
+    }
+
+    if (year) {
+      conditions.push(eq(timesheets.year, parseInt(year)));
+    }
+
+    if (month) {
+      conditions.push(eq(timesheets.month, parseInt(month)));
+    }
+
+    const allTimesheets = await db
+      .select({
+        id: timesheets.id,
+        fileName: timesheets.fileName,
+        fileType: timesheets.fileType,
+        fileSize: timesheets.fileSize,
+        year: timesheets.year,
+        month: timesheets.month,
+        uploadedAt: timesheets.uploadedAt,
+        userId: timesheets.userId,
+        username: users.username,
+        firstName: users.firstName,
+        lastName: users.lastName,
+      })
+      .from(timesheets)
+      .leftJoin(users, eq(timesheets.userId, users.id))
+      .where(conditions.length > 0 ? and(...conditions) : undefined)
+      .orderBy(desc(timesheets.uploadedAt));
+
+    res.status(200).json({
+      success: true,
+      data: {
+        timesheets: allTimesheets,
+        count: allTimesheets.length,
+      },
+    });
+  } catch (error) {
+    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
+    res.status(error.statusCode || 500).json(errorResponse);
+  }
+};
+
+/**
+ * Download timesheet file
+ * GET /api/timesheets/:timesheetId/download
+ */
+export const downloadTimesheet = async (req, res) => {
+  const { timesheetId } = req.params;
+  const userId = req.userId;
+  const userRole = req.user.role; // Fix: use req.user.role instead of req.userRole
+
+  try {
+    const [timesheet] = await db
+      .select()
+      .from(timesheets)
+      .where(eq(timesheets.id, timesheetId))
+      .limit(1);
+
+    if (!timesheet) {
+      throw new NotFoundError('Timesheet nenájdený');
+    }
+
+    // Check permissions: user can only download their own timesheets, admin can download all
+    if (userRole !== 'admin' && timesheet.userId !== userId) {
+      throw new ForbiddenError('Nemáte oprávnenie stiahnuť tento timesheet');
+    }
+
+    // Check if file exists
+    try {
+      await fs.access(timesheet.filePath);
+    } catch {
+      throw new NotFoundError('Súbor nebol nájdený na serveri');
+    }
+
+    // Send file
+    res.download(timesheet.filePath, timesheet.fileName);
+  } catch (error) {
+    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
+    res.status(error.statusCode || 500).json(errorResponse);
+  }
+};
+
+/**
+ * Delete timesheet
+ * DELETE /api/timesheets/:timesheetId
+ */
+export const deleteTimesheet = async (req, res) => {
+  const { timesheetId } = req.params;
+  const userId = req.userId;
+  const userRole = req.user.role; // Fix: use req.user.role instead of req.userRole
+
+  try {
+    const [timesheet] = await db
+      .select()
+      .from(timesheets)
+      .where(eq(timesheets.id, timesheetId))
+      .limit(1);
+
+    if (!timesheet) {
+      throw new NotFoundError('Timesheet nenájdený');
+    }
+
+    // Check permissions: user can only delete their own timesheets, admin can delete all
+    if (userRole !== 'admin' && timesheet.userId !== userId) {
+      throw new ForbiddenError('Nemáte oprávnenie zmazať tento timesheet');
+    }
+
+    // Delete file from filesystem
+    try {
+      await fs.unlink(timesheet.filePath);
+    } catch (unlinkError) {
+      console.error('Failed to delete file from filesystem:', unlinkError);
+      // Continue with database deletion even if file deletion fails
+    }
+
+    // Delete from database
+    await db.delete(timesheets).where(eq(timesheets.id, timesheetId));
+
+    res.status(200).json({
+      success: true,
+      message: 'Timesheet bol zmazaný',
+    });
+  } catch (error) {
+    const errorResponse = formatErrorResponse(error, process.env.NODE_ENV === 'development');
+    res.status(error.statusCode || 500).json(errorResponse);
+  }
+};

src/db/migrations/0003_add_timesheets_table.sql

@@ -0,0 +1,15 @@
+CREATE TABLE "timesheets" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" uuid NOT NULL,
+	"file_name" text NOT NULL,
+	"file_path" text NOT NULL,
+	"file_type" text NOT NULL,
+	"file_size" integer NOT NULL,
+	"year" integer NOT NULL,
+	"month" integer NOT NULL,
+	"uploaded_at" timestamp DEFAULT now() NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "timesheets" ADD CONSTRAINT "timesheets_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;

src/db/schema.js

@@ -1,39 +1,47 @@
-import { pgTable, text, timestamp, boolean, uuid, pgEnum } from 'drizzle-orm/pg-core';
+import { pgTable, text, timestamp, boolean, uuid, pgEnum, unique, integer } from 'drizzle-orm/pg-core';
 
 // Role enum
 export const roleEnum = pgEnum('role', ['admin', 'member']);
 
-// Users table - hlavná tabuľka používateľov
+// Users table - používatelia systému
 export const users = pgTable('users', {
   id: uuid('id').primaryKey().defaultRandom(),
   username: text('username').notNull().unique(),
-  email: text('email').unique(),
-  emailPassword: text('email_password'), // Heslo k emailovému účtu (encrypted)
-  jmapAccountId: text('jmap_account_id'), // JMAP account ID z truemail
   firstName: text('first_name'),
   lastName: text('last_name'),
   password: text('password'), // bcrypt hash (null ak ešte nenastavené)
   tempPassword: text('temp_password'), // dočasné heslo (bcrypt hash)
-  changedPassword: boolean('changed_password').default(false), // či si užívateľ zmenil heslo
+  changedPassword: boolean('changed_password').default(false),
   role: roleEnum('role').default('member').notNull(),
   lastLogin: timestamp('last_login'),
   createdAt: timestamp('created_at').defaultNow().notNull(),
   updatedAt: timestamp('updated_at').defaultNow().notNull(),
 });
 
-// Email Accounts table - viacero emailových účtov pre jedného usera
+// Email Accounts table - emailové účty (môžu byť zdieľané medzi viacerými používateľmi)
 export const emailAccounts = pgTable('email_accounts', {
   id: uuid('id').primaryKey().defaultRandom(),
-  userId: uuid('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
+  email: text('email').notNull().unique(), // Email adresa
-  email: text('email').notNull(),
   emailPassword: text('email_password').notNull(), // Heslo k emailovému účtu (encrypted)
   jmapAccountId: text('jmap_account_id').notNull(), // JMAP account ID z truemail
-  isPrimary: boolean('is_primary').default(false).notNull(), // primárny email účet
   isActive: boolean('is_active').default(true).notNull(), // či je účet aktívny
   createdAt: timestamp('created_at').defaultNow().notNull(),
   updatedAt: timestamp('updated_at').defaultNow().notNull(),
 });
 
+// User Email Accounts - many-to-many medzi users a emailAccounts
+// Umožňuje zdieľať email účty medzi viacerými používateľmi
+export const userEmailAccounts = pgTable('user_email_accounts', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  userId: uuid('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
+  emailAccountId: uuid('email_account_id').references(() => emailAccounts.id, { onDelete: 'cascade' }).notNull(),
+  isPrimary: boolean('is_primary').default(false).notNull(), // primárny email účet pre daného usera
+  addedAt: timestamp('added_at').defaultNow().notNull(),
+}, (table) => ({
+  // Jeden user môže mať email account len raz
+  userEmailUnique: unique('user_email_unique').on(table.userId, table.emailAccountId),
+}));
+
 // Audit logs - kompletný audit trail všetkých akcií
 export const auditLogs = pgTable('audit_logs', {
   id: uuid('id').primaryKey().defaultRandom(),
@@ -50,23 +58,27 @@ export const auditLogs = pgTable('audit_logs', {
   createdAt: timestamp('created_at').defaultNow().notNull(),
 });
 
-// Contacts table - ľudia s ktorými komunikujeme cez email
+// Contacts table - kontakty patriace k emailovému účtu
+// Kontakty sú zdieľané medzi všetkými používateľmi, ktorí majú prístup k danému email accountu
 export const contacts = pgTable('contacts', {
   id: uuid('id').primaryKey().defaultRandom(),
-  userId: uuid('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
   emailAccountId: uuid('email_account_id').references(() => emailAccounts.id, { onDelete: 'cascade' }).notNull(),
   email: text('email').notNull(),
   name: text('name'),
   notes: text('notes'),
+  addedBy: uuid('added_by').references(() => users.id, { onDelete: 'set null' }), // kto pridal kontakt
   addedAt: timestamp('added_at').defaultNow().notNull(),
   createdAt: timestamp('created_at').defaultNow().notNull(),
   updatedAt: timestamp('updated_at').defaultNow().notNull(),
-});
+}, (table) => ({
+  // Unique constraint: jeden email môže byť len raz v rámci email accountu
+  accountEmailUnique: unique('account_email_unique').on(table.emailAccountId, table.email),
+}));
 
-// Emails table - uložené emaily z JMAP (iba pre pridané kontakty)
+// Emails table - uložené emaily z JMAP
+// Emaily patria k email accountu a sú zdieľané medzi všetkými používateľmi s prístupom
 export const emails = pgTable('emails', {
   id: uuid('id').primaryKey().defaultRandom(),
-  userId: uuid('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(),
   emailAccountId: uuid('email_account_id').references(() => emailAccounts.id, { onDelete: 'cascade' }).notNull(),
   contactId: uuid('contact_id').references(() => contacts.id, { onDelete: 'cascade' }),
   jmapId: text('jmap_id').unique(),
@@ -78,7 +90,23 @@ export const emails = pgTable('emails', {
   subject: text('subject'),
   body: text('body'),
   isRead: boolean('is_read').default(false).notNull(),
+  sentByUserId: uuid('sent_by_user_id').references(() => users.id, { onDelete: 'set null' }), // kto poslal odpoveď (null ak prijatý email)
   date: timestamp('date'),
   createdAt: timestamp('created_at').defaultNow().notNull(),
   updatedAt: timestamp('updated_at').defaultNow().notNull(),
 });
+
+// Timesheets table - nahrané timesheets od používateľov
+export const timesheets = pgTable('timesheets', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  userId: uuid('user_id').references(() => users.id, { onDelete: 'cascade' }).notNull(), // kto nahral timesheet
+  fileName: text('file_name').notNull(), // originálny názov súboru
+  filePath: text('file_path').notNull(), // cesta k súboru na serveri
+  fileType: text('file_type').notNull(), // 'pdf' alebo 'xlsx'
+  fileSize: integer('file_size').notNull(), // veľkosť súboru v bytoch
+  year: integer('year').notNull(), // rok (napr. 2024)
+  month: integer('month').notNull(), // mesiac (1-12)
+  uploadedAt: timestamp('uploaded_at').defaultNow().notNull(),
+  createdAt: timestamp('created_at').defaultNow().notNull(),
+  updatedAt: timestamp('updated_at').defaultNow().notNull(),
+});

src/routes/timesheet.routes.js

@@ -0,0 +1,88 @@
+import express from 'express';
+import multer from 'multer';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import * as timesheetController from '../controllers/timesheet.controller.js';
+import { authenticate } from '../middlewares/auth/authMiddleware.js';
+import { requireAdmin } from '../middlewares/auth/roleMiddleware.js';
+import { validateBody, validateParams } from '../middlewares/security/validateInput.js';
+import { z } from 'zod';
+import fs from 'fs/promises';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const router = express.Router();
+
+// Create uploads directory if it doesn't exist
+const uploadsDir = path.join(process.cwd(), 'uploads', 'timesheets');
+await fs.mkdir(uploadsDir, { recursive: true });
+
+// Configure multer for file uploads - use memory storage first
+const upload = multer({
+  storage: multer.memoryStorage(),
+  limits: {
+    fileSize: 10 * 1024 * 1024, // 10MB limit
+  },
+  fileFilter: (req, file, cb) => {
+    const allowedTypes = ['application/pdf', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/vnd.ms-excel'];
+    if (allowedTypes.includes(file.mimetype)) {
+      cb(null, true);
+    } else {
+      cb(new Error('Neplatný typ súboru. Povolené sú iba PDF a Excel súbory.'), false);
+    }
+  }
+});
+
+/**
+ * All timesheet routes require authentication
+ */
+router.use(authenticate);
+
+/**
+ * Upload timesheet
+ * POST /api/timesheets/upload
+ */
+router.post(
+  '/upload',
+  upload.single('file'),
+  validateBody(z.object({
+    year: z.string().regex(/^\d{4}$/, 'Rok musí byť 4-miestne číslo'),
+    month: z.string().regex(/^([1-9]|1[0-2])$/, 'Mesiac musí byť číslo od 1 do 12'),
+  })),
+  timesheetController.uploadTimesheet
+);
+
+/**
+ * Get user's timesheets
+ * GET /api/timesheets/my
+ */
+router.get('/my', timesheetController.getMyTimesheets);
+
+/**
+ * Get all timesheets (admin only)
+ * GET /api/timesheets/all
+ */
+router.get('/all', requireAdmin, timesheetController.getAllTimesheets);
+
+/**
+ * Download timesheet
+ * GET /api/timesheets/:timesheetId/download
+ */
+router.get(
+  '/:timesheetId/download',
+  validateParams(z.object({ timesheetId: z.string().uuid() })),
+  timesheetController.downloadTimesheet
+);
+
+/**
+ * Delete timesheet
+ * DELETE /api/timesheets/:timesheetId
+ */
+router.delete(
+  '/:timesheetId',
+  validateParams(z.object({ timesheetId: z.string().uuid() })),
+  timesheetController.deleteTimesheet
+);
+
+export default router;

src/scripts/fix-duplicate-contacts.js

@@ -1,90 +0,0 @@
-import { db } from '../config/database.js';
-import { contacts, emails } from '../db/schema.js';
-import { eq, and, sql } from 'drizzle-orm';
-import { logger } from '../utils/logger.js';
-
-/**
- * Fix duplicate contacts by merging them
- * - Finds contacts with the same email address
- * - Keeps the newest contact
- * - Updates all emails to use the newest contact ID
- * - Deletes old duplicate contacts
- */
-async function fixDuplicateContacts() {
-  try {
-    logger.info('🔍 Finding duplicate contacts...');
-
-    // Find duplicate contacts (same userId + email)
-    const duplicates = await db
-      .select({
-        userId: contacts.userId,
-        email: contacts.email,
-        count: sql`count(*)::int`,
-        ids: sql`array_agg(${contacts.id} ORDER BY ${contacts.createdAt} DESC)`,
-      })
-      .from(contacts)
-      .groupBy(contacts.userId, contacts.email)
-      .having(sql`count(*) > 1`);
-
-    if (duplicates.length === 0) {
-      logger.success('✅ No duplicate contacts found!');
-      return;
-    }
-
-    logger.info(`Found ${duplicates.length} sets of duplicate contacts`);
-
-    let totalFixed = 0;
-    let totalDeleted = 0;
-
-    for (const dup of duplicates) {
-      const contactIds = dup.ids;
-      const newestContactId = contactIds[0]; // First one (ordered by createdAt DESC)
-      const oldContactIds = contactIds.slice(1); // Rest are duplicates
-
-      logger.info(`\n📧 Fixing duplicates for ${dup.email}:`);
-      logger.info(`  - Keeping contact: ${newestContactId}`);
-      logger.info(`  - Merging ${oldContactIds.length} duplicate(s): ${oldContactIds.join(', ')}`);
-
-      // Update all emails from old contacts to use the newest contact ID
-      for (const oldContactId of oldContactIds) {
-        const updateResult = await db
-          .update(emails)
-          .set({ contactId: newestContactId, updatedAt: new Date() })
-          .where(eq(emails.contactId, oldContactId))
-          .returning();
-
-        if (updateResult.length > 0) {
-          logger.success(`  ✅ Updated ${updateResult.length} emails from ${oldContactId} → ${newestContactId}`);
-          totalFixed += updateResult.length;
-        }
-
-        // Delete the old duplicate contact
-        await db
-          .delete(contacts)
-          .where(eq(contacts.id, oldContactId));
-
-        logger.success(`  🗑️  Deleted duplicate contact: ${oldContactId}`);
-        totalDeleted++;
-      }
-    }
-
-    logger.success(`\n✅ Cleanup complete!`);
-    logger.success(`   - Fixed ${totalFixed} emails`);
-    logger.success(`   - Deleted ${totalDeleted} duplicate contacts`);
-
-  } catch (error) {
-    logger.error('❌ Error fixing duplicate contacts:', error);
-    throw error;
-  }
-}
-
-// Run the script
-fixDuplicateContacts()
-  .then(() => {
-    logger.success('🎉 Script completed successfully!');
-    process.exit(0);
-  })
-  .catch((error) => {
-    logger.error('💥 Script failed:', error);
-    process.exit(1);
-  });

src/scripts/fix-wrong-contact-associations.js

@@ -0,0 +1,104 @@
+import { db } from '../config/database.js';
+import { emails, contacts } from '../db/schema.js';
+import { eq, and, or, ne, isNotNull } from 'drizzle-orm';
+import { logger } from '../utils/logger.js';
+
+/**
+ * Fix emails that have wrong contactId
+ *
+ * This script finds emails where the contactId doesn't match the actual contact
+ * based on the from/to fields, and updates them to the correct contactId.
+ *
+ * Run with: node src/scripts/fix-wrong-contact-associations.js
+ */
+
+async function fixWrongContactAssociations() {
+  try {
+    logger.info('🔧 Starting to fix wrong contact associations...');
+
+    // Get all contacts grouped by email account
+    const allContacts = await db
+      .select()
+      .from(contacts)
+      .orderBy(contacts.emailAccountId, contacts.email);
+
+    logger.info(`Found ${allContacts.length} contacts to process`);
+
+    let totalFixed = 0;
+    let totalChecked = 0;
+
+    // Process each contact
+    for (const contact of allContacts) {
+      logger.info(`\n📧 Processing contact: ${contact.email} (${contact.name})`);
+
+      // Find emails that belong to this contact but have wrong contactId
+      // Email belongs to contact if from === contact.email OR to === contact.email
+      const wrongEmails = await db
+        .select()
+        .from(emails)
+        .where(
+          and(
+            eq(emails.emailAccountId, contact.emailAccountId),
+            ne(emails.contactId, contact.id), // Has different contactId
+            or(
+              eq(emails.from, contact.email),
+              eq(emails.to, contact.email)
+            )
+          )
+        );
+
+      totalChecked += wrongEmails.length;
+
+      if (wrongEmails.length > 0) {
+        logger.info(`  ⚠️  Found ${wrongEmails.length} emails with wrong contactId`);
+
+        for (const email of wrongEmails) {
+          // Get old contact name for logging
+          const [oldContact] = await db
+            .select()
+            .from(contacts)
+            .where(eq(contacts.id, email.contactId))
+            .limit(1);
+
+          logger.info(`  📬 Fixing email "${email.subject}"`);
+          logger.info(`     From: ${email.from} → To: ${email.to}`);
+          logger.info(`     Old contact: ${oldContact?.email || 'unknown'} → New contact: ${contact.email}`);
+
+          // Update to correct contactId
+          await db
+            .update(emails)
+            .set({ contactId: contact.id })
+            .where(eq(emails.id, email.id));
+
+          totalFixed++;
+        }
+
+        logger.success(`  ✅ Fixed ${wrongEmails.length} emails for ${contact.email}`);
+      } else {
+        logger.info(`  ✅ No wrong associations found for ${contact.email}`);
+      }
+    }
+
+    logger.success(`\n✅ Fix completed!
+   - Total contacts checked: ${allContacts.length}
+   - Total wrong emails found: ${totalChecked}
+   - Total emails fixed: ${totalFixed}
+`);
+
+    return { totalContacts: allContacts.length, totalChecked, totalFixed };
+  } catch (error) {
+    logger.error('Error fixing contact associations', error);
+    throw error;
+  }
+}
+
+// Run the script
+fixWrongContactAssociations()
+  .then((result) => {
+    logger.success('Script finished successfully', result);
+    process.exit(0);
+  })
+  .catch((error) => {
+    logger.error('Script failed', error);
+    process.exit(1);
+  });

src/scripts/fresh-database.js

@@ -0,0 +1,189 @@
+import { db } from '../config/database.js';
+import { sql } from 'drizzle-orm';
+import { logger } from '../utils/logger.js';
+
+/**
+ * Fresh database - vymaže všetky tabuľky a vytvorí ich znova
+ *
+ * ⚠️  POZOR: Tento script vymaže všetky dáta!
+ * Použite len na development alebo pri začiatku s novými dátami.
+ */
+async function freshDatabase() {
+  try {
+    logger.warn('\n⚠️  POZOR: Tento script vymaže všetky dáta!');
+    logger.warn('   Čaká sa 5 sekúnd... Stlač Ctrl+C na zrušenie.\n');
+
+    // Wait 5 seconds
+    await new Promise(resolve => setTimeout(resolve, 5000));
+
+    logger.info('🔄 Dropping all tables...');
+
+    // Drop all tables in correct order (reverse of dependencies)
+    await db.execute(sql`DROP TABLE IF EXISTS emails CASCADE`);
+    logger.success('  ✅ Dropped table: emails');
+
+    await db.execute(sql`DROP TABLE IF EXISTS contacts CASCADE`);
+    logger.success('  ✅ Dropped table: contacts');
+
+    await db.execute(sql`DROP TABLE IF EXISTS user_email_accounts CASCADE`);
+    logger.success('  ✅ Dropped table: user_email_accounts');
+
+    await db.execute(sql`DROP TABLE IF EXISTS email_accounts CASCADE`);
+    logger.success('  ✅ Dropped table: email_accounts');
+
+    await db.execute(sql`DROP TABLE IF EXISTS audit_logs CASCADE`);
+    logger.success('  ✅ Dropped table: audit_logs');
+
+    await db.execute(sql`DROP TABLE IF EXISTS users CASCADE`);
+    logger.success('  ✅ Dropped table: users');
+
+    await db.execute(sql`DROP TYPE IF EXISTS role CASCADE`);
+    logger.success('  ✅ Dropped type: role');
+
+    logger.info('\n🔨 Creating all tables...');
+
+    // Create role enum
+    await db.execute(sql`CREATE TYPE role AS ENUM ('admin', 'member')`);
+    logger.success('  ✅ Created type: role');
+
+    // Create users table
+    await db.execute(sql`
+      CREATE TABLE users (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        username TEXT NOT NULL UNIQUE,
+        first_name TEXT,
+        last_name TEXT,
+        password TEXT,
+        temp_password TEXT,
+        changed_password BOOLEAN NOT NULL DEFAULT false,
+        role role NOT NULL DEFAULT 'member',
+        last_login TIMESTAMP,
+        created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMP NOT NULL DEFAULT NOW()
+      )
+    `);
+    logger.success('  ✅ Created table: users');
+
+    // Create email_accounts table
+    await db.execute(sql`
+      CREATE TABLE email_accounts (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        email TEXT NOT NULL UNIQUE,
+        email_password TEXT NOT NULL,
+        jmap_account_id TEXT NOT NULL,
+        is_active BOOLEAN NOT NULL DEFAULT true,
+        created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMP NOT NULL DEFAULT NOW()
+      )
+    `);
+    logger.success('  ✅ Created table: email_accounts');
+
+    // Create user_email_accounts junction table
+    await db.execute(sql`
+      CREATE TABLE user_email_accounts (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+        email_account_id UUID NOT NULL REFERENCES email_accounts(id) ON DELETE CASCADE,
+        is_primary BOOLEAN NOT NULL DEFAULT false,
+        added_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        UNIQUE(user_id, email_account_id)
+      )
+    `);
+    logger.success('  ✅ Created table: user_email_accounts');
+
+    // Create contacts table
+    await db.execute(sql`
+      CREATE TABLE contacts (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        email_account_id UUID NOT NULL REFERENCES email_accounts(id) ON DELETE CASCADE,
+        email TEXT NOT NULL,
+        name TEXT,
+        notes TEXT,
+        added_by UUID REFERENCES users(id) ON DELETE SET NULL,
+        added_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        UNIQUE(email_account_id, email)
+      )
+    `);
+    logger.success('  ✅ Created table: contacts');
+
+    // Create emails table
+    await db.execute(sql`
+      CREATE TABLE emails (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        email_account_id UUID NOT NULL REFERENCES email_accounts(id) ON DELETE CASCADE,
+        contact_id UUID REFERENCES contacts(id) ON DELETE CASCADE,
+        jmap_id TEXT UNIQUE,
+        message_id TEXT UNIQUE,
+        thread_id TEXT,
+        in_reply_to TEXT,
+        "from" TEXT,
+        "to" TEXT,
+        subject TEXT,
+        body TEXT,
+        is_read BOOLEAN NOT NULL DEFAULT false,
+        sent_by_user_id UUID REFERENCES users(id) ON DELETE SET NULL,
+        date TIMESTAMP,
+        created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMP NOT NULL DEFAULT NOW()
+      )
+    `);
+    logger.success('  ✅ Created table: emails');
+
+    // Create audit_logs table
+    await db.execute(sql`
+      CREATE TABLE audit_logs (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        user_id UUID REFERENCES users(id) ON DELETE SET NULL,
+        action TEXT NOT NULL,
+        resource TEXT NOT NULL,
+        resource_id TEXT,
+        old_value TEXT,
+        new_value TEXT,
+        ip_address TEXT,
+        user_agent TEXT,
+        success BOOLEAN NOT NULL DEFAULT true,
+        error_message TEXT,
+        created_at TIMESTAMP NOT NULL DEFAULT NOW()
+      )
+    `);
+    logger.success('  ✅ Created table: audit_logs');
+
+    // Create indexes
+    logger.info('\n📊 Creating indexes...');
+
+    await db.execute(sql`CREATE INDEX idx_user_email_accounts_user ON user_email_accounts(user_id)`);
+    await db.execute(sql`CREATE INDEX idx_user_email_accounts_account ON user_email_accounts(email_account_id)`);
+    await db.execute(sql`CREATE INDEX idx_contacts_account ON contacts(email_account_id)`);
+    await db.execute(sql`CREATE INDEX idx_contacts_email ON contacts(email)`);
+    await db.execute(sql`CREATE INDEX idx_emails_account ON emails(email_account_id)`);
+    await db.execute(sql`CREATE INDEX idx_emails_contact ON emails(contact_id)`);
+    await db.execute(sql`CREATE INDEX idx_emails_thread ON emails(thread_id)`);
+    await db.execute(sql`CREATE INDEX idx_emails_date ON emails(date DESC)`);
+
+    logger.success('  ✅ Created all indexes');
+
+    logger.success('\n✅ Fresh database created successfully!');
+    logger.info('\n📝 Next steps:');
+    logger.info('   1. Run seed script to create admin user:');
+    logger.info('      node src/scripts/seed-admin.js');
+    logger.info('   2. Start the server:');
+    logger.info('      npm run dev');
+
+  } catch (error) {
+    logger.error('❌ Failed to create fresh database:', error);
+    throw error;
+  }
+}
+
+// Run the script
+freshDatabase()
+  .then(() => {
+    logger.success('🎉 Script completed!');
+    process.exit(0);
+  })
+  .catch((error) => {
+    logger.error('💥 Script failed:', error);
+    process.exit(1);
+  });

src/scripts/seed-admin.js

@@ -0,0 +1,75 @@
+import { db } from '../config/database.js';
+import { users } from '../db/schema.js';
+import { eq } from 'drizzle-orm';
+import { hashPassword } from '../utils/password.js';
+import { logger } from '../utils/logger.js';
+
+/**
+ * Seed admin user
+ *
+ * Vytvorí admin používateľa s credentials:
+ * - username: admin
+ * - password: admin123
+ *
+ * ⚠️  DÔLEŽITÉ: Zmeňte heslo po prvom prihlásení!
+ */
+async function seedAdmin() {
+  try {
+    logger.info('🌱 Creating admin user...');
+
+    const username = 'admin';
+    const password = 'admin123';
+    const hashedPassword = await hashPassword(password);
+
+    // Check if admin already exists
+    const existingAdmins = await db.select().from(users).where(eq(users.username, username));
+
+    if (existingAdmins.length > 0) {
+      logger.warn('⚠️  Admin user already exists, skipping...');
+      logger.info('\nAdmin credentials:');
+      logger.info('  Username: admin');
+      logger.info('  Password: (unchanged)');
+      return;
+    }
+
+    // Create admin user
+    const [admin] = await db
+      .insert(users)
+      .values({
+        username,
+        password: hashedPassword,
+        firstName: 'Admin',
+        lastName: 'User',
+        role: 'admin',
+        changedPassword: true, // Admin už má nastavené heslo
+      })
+      .returning();
+
+    logger.success('✅ Admin user created successfully!');
+    logger.info('\n📋 Admin credentials:');
+    logger.info(`  Username: ${username}`);
+    logger.info(`  Password: ${password}`);
+    logger.warn('\n⚠️  DÔLEŽITÉ: Zmeňte heslo po prvom prihlásení!');
+
+    logger.info('\n📝 Next steps:');
+    logger.info('   1. Start the server:');
+    logger.info('      npm run dev');
+    logger.info('   2. Login as admin');
+    logger.info('   3. Create users and add email accounts');
+
+  } catch (error) {
+    logger.error('❌ Failed to seed admin user:', error);
+    throw error;
+  }
+}
+
+// Run the script
+seedAdmin()
+  .then(() => {
+    logger.success('🎉 Seed completed!');
+    process.exit(0);
+  })
+  .catch((error) => {
+    logger.error('💥 Seed failed:', error);
+    process.exit(1);
+  });

src/services/auth.service.js

@@ -1,14 +1,12 @@
 import { eq } from 'drizzle-orm';
 import { db } from '../config/database.js';
 import { users } from '../db/schema.js';
-import { hashPassword, comparePassword, encryptPassword, decryptPassword } from '../utils/password.js';
+import { hashPassword, comparePassword } from '../utils/password.js';
 import { generateTokenPair } from '../utils/jwt.js';
-import { validateJmapCredentials } from './email.service.js';
+import * as emailAccountService from './email-account.service.js';
 import {
   AuthenticationError,
-  ConflictError,
   NotFoundError,
-  ValidationError,
 } from '../utils/errors.js';
 
 /**
@@ -55,11 +53,13 @@ export const loginWithTempPassword = async (username, password, ipAddress, userA
   // Generuj JWT tokeny
   const tokens = generateTokenPair(user);
 
+  // Check if user has email accounts (many-to-many)
+  const userEmailAccounts = await emailAccountService.getUserEmailAccounts(user.id);
+
   return {
     user: {
       id: user.id,
       username: user.username,
-      email: user.email,
       firstName: user.firstName,
       lastName: user.lastName,
       role: user.role,
@@ -67,7 +67,7 @@ export const loginWithTempPassword = async (username, password, ipAddress, userA
     },
     tokens,
     needsPasswordChange: !user.changedPassword,
-    needsEmailSetup: !user.email,
+    needsEmailSetup: userEmailAccounts.length === 0,
   };
 };
 
@@ -112,6 +112,7 @@ export const setNewPassword = async (userId, newPassword) => {
 
 /**
  * KROK 3: Pripojenie emailu s JMAP validáciou
+ * Používa many-to-many vzťah cez userEmailAccounts
  */
 export const linkEmail = async (userId, email, emailPassword) => {
   const [user] = await db
@@ -124,38 +125,22 @@ export const linkEmail = async (userId, email, emailPassword) => {
     throw new NotFoundError('Používateľ nenájdený');
   }
 
-  // Skontroluj či email už nie je použitý
+  // Použij emailAccountService ktorý automaticky vytvorí many-to-many link
-  const [existingUser] = await db
+  const newEmailAccount = await emailAccountService.createEmailAccount(
-    .select()
+    userId,
-    .from(users)
-    .where(eq(users.email, email))
-    .limit(1);
-
-  if (existingUser) {
-    throw new ConflictError('Email už je použitý');
-  }
-
-  // Validuj JMAP credentials a získaj account ID
-  const { accountId } = await validateJmapCredentials(email, emailPassword);
-
-  // Encrypt email password pre bezpečné uloženie (nie hash, lebo potrebujeme decryption pre JMAP)
-  const encryptedEmailPassword = encryptPassword(emailPassword);
-
-  // Update user s email credentials
-  await db
-    .update(users)
-    .set({
     email,
-      emailPassword: encryptedEmailPassword,
+    emailPassword
-      jmapAccountId: accountId,
+  );
-      updatedAt: new Date(),
-    })
-    .where(eq(users.id, userId));
 
   return {
     success: true,
-    accountId,
+    accountId: newEmailAccount.jmapAccountId,
-    message: 'Email účet úspešne pripojený',
+    emailAccountId: newEmailAccount.id,
+    isPrimary: newEmailAccount.isPrimary,
+    shared: newEmailAccount.shared,
+    message: newEmailAccount.shared
+      ? 'Email účet už existoval a bol zdieľaný s vami'
+      : 'Nový email účet úspešne vytvorený a pripojený',
   };
 };
 
@@ -191,15 +176,13 @@ export const logout = async () => {
 
 /**
  * Get user by ID
+ * Email credentials sú v emailAccounts tabuľke (many-to-many)
  */
 export const getUserById = async (userId) => {
   const [user] = await db
     .select({
       id: users.id,
       username: users.username,
-      email: users.email,
-      emailPassword: users.emailPassword,
-      jmapAccountId: users.jmapAccountId,
       firstName: users.firstName,
       lastName: users.lastName,
       role: users.role,
@@ -215,5 +198,11 @@ export const getUserById = async (userId) => {
     throw new NotFoundError('Používateľ nenájdený');
   }
 
-  return user;
+  // Get user's email accounts (many-to-many)
+  const userEmailAccounts = await emailAccountService.getUserEmailAccounts(userId);
+
+  return {
+    ...user,
+    emailAccounts: userEmailAccounts,
+  };
 };

src/services/contact.service.js

@@ -1,41 +1,34 @@
 import { db } from '../config/database.js';
 import { contacts, emails } from '../db/schema.js';
-import { eq, and, desc } from 'drizzle-orm';
+import { eq, and, desc, or, ne } from 'drizzle-orm';
 import { NotFoundError, ConflictError } from '../utils/errors.js';
 import { syncEmailsFromSender } from './jmap.service.js';
 import { logger } from '../utils/logger.js';
 
 /**
- * Get all contacts for a user
+ * Get all contacts for an email account
- * If emailAccountId is provided, filter by that account, otherwise return all
+ * Kontakty patria k email accountu, nie k jednotlivým používateľom
  */
-export const getUserContacts = async (userId, emailAccountId = null) => {
+export const getContactsForEmailAccount = async (emailAccountId) => {
-  const conditions = [eq(contacts.userId, userId)];
+  const accountContacts = await db
-
-  if (emailAccountId) {
-    conditions.push(eq(contacts.emailAccountId, emailAccountId));
-  }
-
-  const userContacts = await db
     .select()
     .from(contacts)
-    .where(and(...conditions))
+    .where(eq(contacts.emailAccountId, emailAccountId))
     .orderBy(desc(contacts.addedAt));
 
-  return userContacts;
+  return accountContacts;
 };
 
 /**
- * Add a new contact and sync their emails
+ * Add a new contact to an email account
  */
-export const addContact = async (userId, emailAccountId, jmapConfig, email, name = '', notes = '') => {
+export const addContact = async (emailAccountId, jmapConfig, email, name = '', notes = '', addedByUserId = null) => {
   // Check if contact already exists for this email account
   const [existing] = await db
     .select()
     .from(contacts)
     .where(
       and(
-        eq(contacts.userId, userId),
         eq(contacts.emailAccountId, emailAccountId),
         eq(contacts.email, email)
       )
@@ -50,33 +43,80 @@ export const addContact = async (userId, emailAccountId, jmapConfig, email, name
   const [newContact] = await db
     .insert(contacts)
     .values({
-      userId,
       emailAccountId,
       email,
       name: name || email.split('@')[0],
       notes: notes || null,
+      addedBy: addedByUserId,
     })
     .returning();
 
   // Sync emails from this sender
   try {
-    await syncEmailsFromSender(jmapConfig, userId, emailAccountId, newContact.id, email);
+    await syncEmailsFromSender(jmapConfig, emailAccountId, newContact.id, email);
   } catch (error) {
     logger.error('Failed to sync emails for new contact', { error: error.message });
     // Don't throw - contact was created successfully
   }
 
+  // REASSIGN: Fix any existing emails that belong to this contact but have wrong contactId
+  try {
+    logger.info(`Checking for emails to reassign to contact ${email}...`);
+
+    // Find emails where:
+    // - from === newContact.email OR to === newContact.email
+    // - contactId !== newContact.id (belongs to different contact)
+    // - emailAccountId matches
+    const emailsToReassign = await db
+      .select()
+      .from(emails)
+      .where(
+        and(
+          eq(emails.emailAccountId, emailAccountId),
+          ne(emails.contactId, newContact.id),
+          or(
+            eq(emails.from, email),
+            eq(emails.to, email)
+          )
+        )
+      );
+
+    if (emailsToReassign.length > 0) {
+      logger.info(`Found ${emailsToReassign.length} emails to reassign to contact ${email}`);
+
+      // Update contactId for these emails
+      for (const emailToReassign of emailsToReassign) {
+        await db
+          .update(emails)
+          .set({ contactId: newContact.id })
+          .where(eq(emails.id, emailToReassign.id));
+      }
+
+      logger.success(`Reassigned ${emailsToReassign.length} emails to contact ${email}`);
+    } else {
+      logger.info(`No emails to reassign for contact ${email}`);
+    }
+  } catch (error) {
+    logger.error('Failed to reassign emails', { error: error.message });
+    // Don't throw - contact was created successfully
+  }
+
   return newContact;
 };
 
 /**
- * Get a contact by ID
+ * Get a contact by ID (check it belongs to the email account)
  */
-export const getContactById = async (contactId, userId) => {
+export const getContactById = async (contactId, emailAccountId) => {
   const [contact] = await db
     .select()
     .from(contacts)
-    .where(and(eq(contacts.id, contactId), eq(contacts.userId, userId)))
+    .where(
+      and(
+        eq(contacts.id, contactId),
+        eq(contacts.emailAccountId, emailAccountId)
+      )
+    )
     .limit(1);
 
   if (!contact) {
@@ -89,16 +129,8 @@ export const getContactById = async (contactId, userId) => {
 /**
  * Remove a contact
  */
-export const removeContact = async (userId, contactId) => {
+export const removeContact = async (contactId, emailAccountId) => {
-  const [contact] = await db
+  const contact = await getContactById(contactId, emailAccountId);
-    .select()
-    .from(contacts)
-    .where(and(eq(contacts.id, contactId), eq(contacts.userId, userId)))
-    .limit(1);
-
-  if (!contact) {
-    throw new NotFoundError('Kontakt nenájdený');
-  }
 
   // Delete contact (emails will be cascade deleted)
   await db.delete(contacts).where(eq(contacts.id, contactId));
@@ -109,16 +141,8 @@ export const removeContact = async (userId, contactId) => {
 /**
  * Update contact
  */
-export const updateContact = async (userId, contactId, { name, notes }) => {
+export const updateContact = async (contactId, emailAccountId, { name, notes }) => {
-  const [contact] = await db
+  const contact = await getContactById(contactId, emailAccountId);
-    .select()
-    .from(contacts)
-    .where(and(eq(contacts.id, contactId), eq(contacts.userId, userId)))
-    .limit(1);
-
-  if (!contact) {
-    throw new NotFoundError('Kontakt nenájdený');
-  }
 
   const [updated] = await db
     .update(contacts)

src/services/crm-email.service.js

@@ -1,20 +1,13 @@
 import { db } from '../config/database.js';
 import { emails, contacts } from '../db/schema.js';
-import { eq, and, or, desc, like, sql } from 'drizzle-orm';
+import { eq, and, or, desc, like, sql, inArray } from 'drizzle-orm';
 import { NotFoundError } from '../utils/errors.js';
 
 /**
- * Get all emails for a user (only from added contacts)
+ * Get all emails for an email account (only from added contacts)
- * If emailAccountId is provided, filter by that account
  */
-export const getUserEmails = async (userId, emailAccountId = null) => {
+export const getEmailsForAccount = async (emailAccountId) => {
-  const conditions = [eq(emails.userId, userId)];
+  const accountEmails = await db
-
-  if (emailAccountId) {
-    conditions.push(eq(emails.emailAccountId, emailAccountId));
-  }
-
-  const userEmails = await db
     .select({
       id: emails.id,
       jmapId: emails.jmapId,
@@ -26,6 +19,7 @@ export const getUserEmails = async (userId, emailAccountId = null) => {
       subject: emails.subject,
       body: emails.body,
       isRead: emails.isRead,
+      sentByUserId: emails.sentByUserId,
       date: emails.date,
       createdAt: emails.createdAt,
       emailAccountId: emails.emailAccountId,
@@ -36,21 +30,26 @@ export const getUserEmails = async (userId, emailAccountId = null) => {
       },
     })
     .from(emails)
-    .leftJoin(contacts, eq(emails.contactId, contacts.id))
+    .innerJoin(contacts, eq(emails.contactId, contacts.id))
-    .where(and(...conditions))
+    .where(eq(emails.emailAccountId, emailAccountId))
     .orderBy(desc(emails.date));
 
-  return userEmails;
+  return accountEmails;
 };
 
 /**
  * Get emails by thread ID
  */
-export const getEmailThread = async (userId, threadId) => {
+export const getEmailThread = async (emailAccountId, threadId) => {
   const thread = await db
     .select()
     .from(emails)
-    .where(and(eq(emails.userId, userId), eq(emails.threadId, threadId)))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.threadId, threadId)
+      )
+    )
     .orderBy(emails.date);
 
   if (thread.length === 0) {
@@ -62,16 +61,15 @@ export const getEmailThread = async (userId, threadId) => {
 
 /**
  * Search emails (from, to, subject)
- * If emailAccountId is provided, filter by that account
  */
-export const searchEmails = async (userId, query, emailAccountId = null) => {
+export const searchEmails = async (emailAccountId, query) => {
   if (!query || query.trim().length < 2) {
     throw new Error('Search term must be at least 2 characters');
   }
 
   const searchPattern = `%${query}%`;
   const conditions = [
-    eq(emails.userId, userId),
+    eq(emails.emailAccountId, emailAccountId),
     or(
       like(emails.from, searchPattern),
       like(emails.to, searchPattern),
@@ -79,10 +77,6 @@ export const searchEmails = async (userId, query, emailAccountId = null) => {
     ),
   ];
 
-  if (emailAccountId) {
-    conditions.push(eq(emails.emailAccountId, emailAccountId));
-  }
-
   const results = await db
     .select()
     .from(emails)
@@ -94,173 +88,150 @@ export const searchEmails = async (userId, query, emailAccountId = null) => {
 };
 
 /**
- * Get unread email count
+ * Get unread email count for an email account (only from added contacts)
- * Returns total count and counts per email account
  */
-export const getUnreadCount = async (userId) => {
+export const getUnreadCountForAccount = async (emailAccountId) => {
-  // Get total unread count
+  const result = await db
-  const totalResult = await db
     .select({ count: sql`count(*)::int` })
     .from(emails)
-    .where(and(eq(emails.userId, userId), eq(emails.isRead, false)));
+    .innerJoin(contacts, eq(emails.contactId, contacts.id))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.isRead, false)
+      )
+    );
 
-  const totalUnread = totalResult[0]?.count || 0;
+  return result[0]?.count || 0;
+};
 
-  // Get unread count per email account
+/**
+ * Get unread email count summary for all user's email accounts (only from added contacts)
+ */
+export const getUnreadCountSummary = async (emailAccountIds) => {
+  if (!emailAccountIds || emailAccountIds.length === 0) {
+    return {
+      totalUnread: 0,
+      byAccount: [],
+    };
+  }
+
+  // Get unread count per email account (only from added contacts)
   const accountCounts = await db
     .select({
       emailAccountId: emails.emailAccountId,
       count: sql`count(*)::int`,
     })
     .from(emails)
-    .where(and(eq(emails.userId, userId), eq(emails.isRead, false)))
+    .innerJoin(contacts, eq(emails.contactId, contacts.id))
+    .where(
+      and(
+        inArray(emails.emailAccountId, emailAccountIds),
+        eq(emails.isRead, false)
+      )
+    )
     .groupBy(emails.emailAccountId);
 
+  const totalUnread = accountCounts.reduce((sum, acc) => sum + acc.count, 0);
+
   return {
     totalUnread,
-    accounts: accountCounts.map((ac) => ({
+    byAccount: accountCounts,
-      emailAccountId: ac.emailAccountId,
-      unreadCount: ac.count,
-    })),
   };
 };
 
+/**
+ * Get unread count by contact for an email account
+ */
+export const getUnreadCountByContact = async (emailAccountId) => {
+  const contactCounts = await db
+    .select({
+      contactId: emails.contactId,
+      contactEmail: contacts.email,
+      contactName: contacts.name,
+      count: sql`count(*)::int`,
+    })
+    .from(emails)
+    .leftJoin(contacts, eq(emails.contactId, contacts.id))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.isRead, false)
+      )
+    )
+    .groupBy(emails.contactId, contacts.email, contacts.name);
+
+  return contactCounts;
+};
+
 /**
  * Mark thread as read
  */
-export const markThreadAsRead = async (userId, threadId) => {
+export const markThreadAsRead = async (emailAccountId, threadId) => {
-  console.log('🟦 markThreadAsRead called:', { userId, threadId });
+  const updated = await db
-
-  const result = await db
     .update(emails)
     .set({ isRead: true, updatedAt: new Date() })
-    .where(and(eq(emails.userId, userId), eq(emails.threadId, threadId), eq(emails.isRead, false)))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.threadId, threadId),
+        eq(emails.isRead, false)
+      )
+    )
     .returning();
 
-  console.log('✅ markThreadAsRead result:', { count: result.length, threadId });
+  return updated.length;
-
-  return { success: true, count: result.length };
 };
 
 /**
  * Mark all emails from a contact as read
  */
-export const markContactEmailsAsRead = async (userId, contactId) => {
+export const markContactEmailsAsRead = async (contactId, emailAccountId) => {
-  console.log('🟦 markContactEmailsAsRead called:', { userId, contactId });
+  const updated = await db
-
-  // Get the contact info first
-  const [contact] = await db
-    .select()
-    .from(contacts)
-    .where(eq(contacts.id, contactId))
-    .limit(1);
-
-  console.log('👤 Contact info:', {
-    id: contact?.id,
-    email: contact?.email,
-    name: contact?.name,
-  });
-
-  // First, check what emails exist for this contact (including already read ones)
-  const allContactEmails = await db
-    .select({
-      id: emails.id,
-      contactId: emails.contactId,
-      isRead: emails.isRead,
-      from: emails.from,
-      subject: emails.subject,
-    })
-    .from(emails)
-    .where(and(eq(emails.userId, userId), eq(emails.contactId, contactId)));
-
-  console.log('📧 All emails for this contact (by contactId):', {
-    total: allContactEmails.length,
-    unread: allContactEmails.filter(e => !e.isRead).length,
-    read: allContactEmails.filter(e => e.isRead).length,
-    sampleEmails: allContactEmails.slice(0, 3),
-  });
-
-  // Check if there are emails from this sender but with NULL or different contactId
-  if (contact) {
-    const emailsFromSender = await db
-      .select({
-        id: emails.id,
-        contactId: emails.contactId,
-        isRead: emails.isRead,
-        from: emails.from,
-        subject: emails.subject,
-      })
-      .from(emails)
-      .where(and(
-        eq(emails.userId, userId),
-        or(
-          eq(emails.from, contact.email),
-          like(emails.from, `%<${contact.email}>%`)
-        )
-      ))
-      .limit(10);
-
-    console.log('📨 Emails from this sender email (any contactId):', {
-      total: emailsFromSender.length,
-      withContactId: emailsFromSender.filter(e => e.contactId === contactId).length,
-      withNullContactId: emailsFromSender.filter(e => e.contactId === null).length,
-      withDifferentContactId: emailsFromSender.filter(e => e.contactId && e.contactId !== contactId).length,
-      sampleEmails: emailsFromSender.slice(0, 3),
-    });
-  }
-
-  // FIX: Mark emails as read by matching sender EMAIL, not just contactId
-  // This fixes the issue with duplicate contacts having different IDs
-  let result = [];
-
-  if (contact) {
-    // Update ALL emails from this sender's email address:
-    // 1. Set the correct contactId (fixes duplicate contact issue)
-    // 2. Mark as read
-    result = await db
-      .update(emails)
-      .set({
-        contactId: contactId,  // Fix contactId for duplicate contacts
-        isRead: true,
-        updatedAt: new Date()
-      })
-      .where(and(
-        eq(emails.userId, userId),
-        or(
-          eq(emails.from, contact.email),
-          like(emails.from, `%<${contact.email}>%`)
-        ),
-        eq(emails.isRead, false)
-      ))
-      .returning();
-
-    console.log('🔧 Fixed contactId and marked as read for emails from:', contact.email);
-  } else {
-    // Fallback: use old method if contact not found
-    result = await db
     .update(emails)
     .set({ isRead: true, updatedAt: new Date() })
-      .where(and(eq(emails.userId, userId), eq(emails.contactId, contactId), eq(emails.isRead, false)))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.contactId, contactId)
+      )
+    )
     .returning();
-  }
 
-  console.log('✅ markContactEmailsAsRead result:', { count: result.length, contactId });
+  return updated.length;
-
-  return {
-    success: true,
-    count: result.length,
-    emails: result, // Return the emails so controller can mark them on JMAP server
-  };
 };
 
 /**
- * Get emails for a specific contact
+ * Get contact by email address for specific email account
  */
-export const getContactEmails = async (userId, contactId) => {
+export const getContactByEmail = async (emailAccountId, contactEmail) => {
+  const [contact] = await db
+    .select()
+    .from(contacts)
+    .where(
+      and(
+        eq(contacts.emailAccountId, emailAccountId),
+        eq(contacts.email, contactEmail)
+      )
+    )
+    .limit(1);
+
+  return contact || null;
+};
+
+/**
+ * Get contact emails with unread count
+ */
+export const getContactEmailsWithUnread = async (emailAccountId, contactId) => {
   const contactEmails = await db
     .select()
     .from(emails)
-    .where(and(eq(emails.userId, userId), eq(emails.contactId, contactId)))
+    .where(
+      and(
+        eq(emails.emailAccountId, emailAccountId),
+        eq(emails.contactId, contactId)
+      )
+    )
     .orderBy(desc(emails.date));
 
   return contactEmails;

src/services/email-account.service.js

@@ -1,6 +1,6 @@
-import { eq, and } from 'drizzle-orm';
+import { eq, and, sql } from 'drizzle-orm';
 import { db } from '../config/database.js';
-import { emailAccounts, users } from '../db/schema.js';
+import { emailAccounts, userEmailAccounts, users } from '../db/schema.js';
 import { encryptPassword, decryptPassword } from '../utils/password.js';
 import { validateJmapCredentials } from './email.service.js';
 import {
@@ -12,40 +12,50 @@ import {
 import { logger } from '../utils/logger.js';
 
 /**
- * Get all email accounts for a user
+ * Get all email accounts for a user (cez many-to-many)
  */
 export const getUserEmailAccounts = async (userId) => {
   const accounts = await db
     .select({
       id: emailAccounts.id,
-      userId: emailAccounts.userId,
       email: emailAccounts.email,
       jmapAccountId: emailAccounts.jmapAccountId,
-      isPrimary: emailAccounts.isPrimary,
       isActive: emailAccounts.isActive,
+      isPrimary: userEmailAccounts.isPrimary,
+      addedAt: userEmailAccounts.addedAt,
       createdAt: emailAccounts.createdAt,
-      updatedAt: emailAccounts.updatedAt,
     })
-    .from(emailAccounts)
+    .from(userEmailAccounts)
-    .where(eq(emailAccounts.userId, userId))
+    .innerJoin(emailAccounts, eq(userEmailAccounts.emailAccountId, emailAccounts.id))
-    .orderBy(emailAccounts.isPrimary, emailAccounts.createdAt);
+    .where(eq(userEmailAccounts.userId, userId))
+    .orderBy(userEmailAccounts.isPrimary, emailAccounts.createdAt);
 
   return accounts;
 };
 
 /**
- * Get a specific email account by ID
+ * Get a specific email account by ID (check user has access)
  */
 export const getEmailAccountById = async (accountId, userId) => {
+  const [link] = await db
+    .select()
+    .from(userEmailAccounts)
+    .where(
+      and(
+        eq(userEmailAccounts.emailAccountId, accountId),
+        eq(userEmailAccounts.userId, userId)
+      )
+    )
+    .limit(1);
+
+  if (!link) {
+    throw new NotFoundError('Email účet nenájdený alebo nemáte k nemu prístup');
+  }
+
   const [account] = await db
     .select()
     .from(emailAccounts)
-    .where(
+    .where(eq(emailAccounts.id, accountId))
-      and(
-        eq(emailAccounts.id, accountId),
-        eq(emailAccounts.userId, userId)
-      )
-    )
     .limit(1);
 
   if (!account) {
@@ -59,40 +69,85 @@ export const getEmailAccountById = async (accountId, userId) => {
  * Get user's primary email account
  */
 export const getPrimaryEmailAccount = async (userId) => {
-  const [account] = await db
+  const [result] = await db
-    .select()
+    .select({
-    .from(emailAccounts)
+      id: emailAccounts.id,
+      email: emailAccounts.email,
+      jmapAccountId: emailAccounts.jmapAccountId,
+      isActive: emailAccounts.isActive,
+    })
+    .from(userEmailAccounts)
+    .innerJoin(emailAccounts, eq(userEmailAccounts.emailAccountId, emailAccounts.id))
     .where(
       and(
-        eq(emailAccounts.userId, userId),
+        eq(userEmailAccounts.userId, userId),
-        eq(emailAccounts.isPrimary, true)
+        eq(userEmailAccounts.isPrimary, true)
       )
     )
     .limit(1);
 
-  return account || null;
+  return result || null;
 };
 
 /**
  * Create a new email account with JMAP validation
+ * Automatic many-to-many link vytvorí pre používateľa, ktorý účet vytvoril
  */
 export const createEmailAccount = async (userId, email, emailPassword) => {
-  // Check if email already exists for this user
+  // Check if email account already exists (globally)
   const [existing] = await db
     .select()
     .from(emailAccounts)
+    .where(eq(emailAccounts.email, email))
+    .limit(1);
+
+  if (existing) {
+    // Email account už existuje - skontroluj či user už má prístup
+    const [userLink] = await db
+      .select()
+      .from(userEmailAccounts)
       .where(
         and(
-        eq(emailAccounts.userId, userId),
+          eq(userEmailAccounts.userId, userId),
-        eq(emailAccounts.email, email)
+          eq(userEmailAccounts.emailAccountId, existing.id)
         )
       )
       .limit(1);
 
-  if (existing) {
+    if (userLink) {
-    throw new ConflictError('Tento email účet už je pripojený');
+      throw new ConflictError('Tento email účet už máte pripojený');
     }
 
+    // Email account existuje, ale user ho nemá - môžeme ho zdieľať
+    // Ale najprv overíme heslo
+    try {
+      await validateJmapCredentials(email, emailPassword);
+    } catch (error) {
+      throw new AuthenticationError('Nesprávne heslo k existujúcemu email účtu');
+    }
+
+    // Check if this is the first email account for this user
+    const existingAccounts = await getUserEmailAccounts(userId);
+    const isFirst = existingAccounts.length === 0;
+
+    // Link user k existujúcemu accountu
+    await db.insert(userEmailAccounts).values({
+      userId,
+      emailAccountId: existing.id,
+      isPrimary: isFirst,
+    });
+
+    return {
+      id: existing.id,
+      email: existing.email,
+      jmapAccountId: existing.jmapAccountId,
+      isPrimary: isFirst,
+      isActive: existing.isActive,
+      shared: true, // Indikuje že ide o zdieľaný account
+    };
+  }
+
+  // Email account neexistuje - vytvoríme nový
   // Validate JMAP credentials and get account ID
   let jmapAccountId;
   try {
@@ -111,26 +166,36 @@ export const createEmailAccount = async (userId, email, emailPassword) => {
   const existingAccounts = await getUserEmailAccounts(userId);
   const isFirst = existingAccounts.length === 0;
 
+  // Use transaction to create email account and link it to user
+  const result = await db.transaction(async (tx) => {
     // Create email account
-  const [newAccount] = await db
+    const [newAccount] = await tx
       .insert(emailAccounts)
       .values({
-      userId,
         email,
         emailPassword: encryptedPassword,
         jmapAccountId,
-      isPrimary: isFirst, // First account is automatically primary
         isActive: true,
       })
       .returning();
 
+    // Link user to email account
+    await tx.insert(userEmailAccounts).values({
+      userId,
+      emailAccountId: newAccount.id,
+      isPrimary: isFirst, // First account is automatically primary
+    });
+
+    return newAccount;
+  });
+
   return {
-    id: newAccount.id,
+    id: result.id,
-    email: newAccount.email,
+    email: result.email,
-    jmapAccountId: newAccount.jmapAccountId,
+    jmapAccountId: result.jmapAccountId,
-    isPrimary: newAccount.isPrimary,
+    isPrimary: isFirst,
-    isActive: newAccount.isActive,
+    isActive: result.isActive,
-    createdAt: newAccount.createdAt,
+    shared: false,
   };
 };
 
@@ -138,9 +203,16 @@ export const createEmailAccount = async (userId, email, emailPassword) => {
  * Update email account password
  */
 export const updateEmailAccountPassword = async (accountId, userId, newPassword) => {
-  const account = await getEmailAccountById(accountId, userId);
+  // Check user has access
+  await getEmailAccountById(accountId, userId);
 
   // Validate new JMAP credentials
+  const [account] = await db
+    .select()
+    .from(emailAccounts)
+    .where(eq(emailAccounts.id, accountId))
+    .limit(1);
+
   try {
     await validateJmapCredentials(account.email, newPassword);
   } catch (error) {
@@ -173,10 +245,23 @@ export const updateEmailAccountPassword = async (accountId, userId, newPassword)
  * Toggle email account active status
  */
 export const toggleEmailAccountStatus = async (accountId, userId, isActive) => {
-  const account = await getEmailAccountById(accountId, userId);
+  // Check user has access
+  await getEmailAccountById(accountId, userId);
+
+  // Get user's link to check if it's primary
+  const [link] = await db
+    .select()
+    .from(userEmailAccounts)
+    .where(
+      and(
+        eq(userEmailAccounts.userId, userId),
+        eq(userEmailAccounts.emailAccountId, accountId)
+      )
+    )
+    .limit(1);
 
   // Cannot deactivate primary account
-  if (account.isPrimary && !isActive) {
+  if (link.isPrimary && !isActive) {
     throw new ValidationError('Nemôžete deaktivovať primárny email účet');
   }
 
@@ -196,68 +281,126 @@ export const toggleEmailAccountStatus = async (accountId, userId, isActive) => {
 };
 
 /**
- * Set an email account as primary
+ * Set an email account as primary FOR SPECIFIC USER
  */
 export const setPrimaryEmailAccount = async (accountId, userId) => {
-  const account = await getEmailAccountById(accountId, userId);
+  // Check user has access
+  await getEmailAccountById(accountId, userId);
 
   // Use transaction to prevent race conditions
-  const updated = await db.transaction(async (tx) => {
+  await db.transaction(async (tx) => {
-    // Remove primary flag from all accounts
+    // Remove primary flag from all user's accounts
     await tx
-      .update(emailAccounts)
+      .update(userEmailAccounts)
-      .set({ isPrimary: false, updatedAt: new Date() })
+      .set({ isPrimary: false })
-      .where(eq(emailAccounts.userId, userId));
+      .where(eq(userEmailAccounts.userId, userId));
 
     // Set new primary account
-    const [updatedAccount] = await tx
+    await tx
+      .update(userEmailAccounts)
+      .set({ isPrimary: true })
+      .where(
+        and(
+          eq(userEmailAccounts.userId, userId),
+          eq(userEmailAccounts.emailAccountId, accountId)
+        )
+      );
+
+    // Make sure email account is active
+    await tx
       .update(emailAccounts)
       .set({
-        isPrimary: true,
+        isActive: true,
-        isActive: true, // Primary account must be active
         updatedAt: new Date(),
       })
-      .where(eq(emailAccounts.id, accountId))
+      .where(eq(emailAccounts.id, accountId));
-      .returning();
-
-    return updatedAccount;
   });
 
+  const [account] = await db
+    .select()
+    .from(emailAccounts)
+    .where(eq(emailAccounts.id, accountId))
+    .limit(1);
+
   return {
-    id: updated.id,
+    id: account.id,
-    email: updated.email,
+    email: account.email,
-    isPrimary: updated.isPrimary,
+    isPrimary: true,
   };
 };
 
 /**
- * Delete an email account
+ * Remove user's access to email account
- * NOTE: This will cascade delete all associated contacts and emails
+ * Ak je to posledný používateľ, vymaže aj samotný email account
  */
-export const deleteEmailAccount = async (accountId, userId) => {
+export const removeUserFromEmailAccount = async (accountId, userId) => {
-  const account = await getEmailAccountById(accountId, userId);
+  // Check user has access
+  await getEmailAccountById(accountId, userId);
 
-  // Cannot delete primary account if it's the only one
+  // Get user's link
-  if (account.isPrimary) {
+  const [link] = await db
-    const allAccounts = await getUserEmailAccounts(userId);
+    .select()
-    if (allAccounts.length === 1) {
+    .from(userEmailAccounts)
-      throw new ValidationError('Nemôžete zmazať posledný email účet');
+    .where(
+      and(
+        eq(userEmailAccounts.userId, userId),
+        eq(userEmailAccounts.emailAccountId, accountId)
+      )
+    )
+    .limit(1);
+
+  // If this is user's primary account, make sure they have another one to set as primary
+  if (link.isPrimary) {
+    const allUserAccounts = await getUserEmailAccounts(userId);
+    if (allUserAccounts.length === 1) {
+      throw new ValidationError('Nemôžete odstrániť posledný email účet');
     }
 
-    // If deleting primary account, make another account primary
+    // Set another account as primary
-    const otherAccount = allAccounts.find(acc => acc.id !== accountId);
+    const otherAccount = allUserAccounts.find(acc => acc.id !== accountId);
     if (otherAccount) {
-      await setPrimaryEmailAccount(otherAccount.id, userId);
+      await db
+        .update(userEmailAccounts)
+        .set({ isPrimary: true })
+        .where(
+          and(
+            eq(userEmailAccounts.userId, userId),
+            eq(userEmailAccounts.emailAccountId, otherAccount.id)
+          )
+        );
     }
   }
 
-  // Delete account (will cascade to contacts and emails)
+  // Remove user's link
+  await db
+    .delete(userEmailAccounts)
+    .where(
+      and(
+        eq(userEmailAccounts.userId, userId),
+        eq(userEmailAccounts.emailAccountId, accountId)
+      )
+    );
+
+  // Check if this was the last user with access to this email account
+  const [remainingLinks] = await db
+    .select({ count: sql`count(*)::int` })
+    .from(userEmailAccounts)
+    .where(eq(userEmailAccounts.emailAccountId, accountId));
+
+  // If no users have access anymore, delete the email account itself
+  if (remainingLinks.count === 0) {
     await db
       .delete(emailAccounts)
       .where(eq(emailAccounts.id, accountId));
 
     return {
-    message: 'Email účet bol úspešne odstránený',
+      message: 'Email účet bol úspešne odstránený (posledný používateľ)',
+      deletedAccountId: accountId,
+    };
+  }
+
+  return {
+    message: 'Prístup k email účtu bol odobraný',
     deletedAccountId: accountId,
   };
 };
@@ -267,7 +410,9 @@ export const deleteEmailAccount = async (accountId, userId) => {
  */
 export const getEmailAccountWithCredentials = async (accountId, userId) => {
   logger.debug('getEmailAccountWithCredentials called', { accountId, userId });
+
   const account = await getEmailAccountById(accountId, userId);
+
   logger.debug('Account retrieved', {
     id: account.id,
     email: account.email,
@@ -286,3 +431,86 @@ export const getEmailAccountWithCredentials = async (accountId, userId) => {
     isActive: account.isActive,
   };
 };
+
+/**
+ * Get all users with access to an email account
+ */
+export const getUsersWithAccessToAccount = async (accountId) => {
+  const usersWithAccess = await db
+    .select({
+      userId: users.id,
+      username: users.username,
+      firstName: users.firstName,
+      lastName: users.lastName,
+      isPrimary: userEmailAccounts.isPrimary,
+      addedAt: userEmailAccounts.addedAt,
+    })
+    .from(userEmailAccounts)
+    .innerJoin(users, eq(userEmailAccounts.userId, users.id))
+    .where(eq(userEmailAccounts.emailAccountId, accountId));
+
+  return usersWithAccess;
+};
+
+/**
+ * Share email account with another user
+ */
+export const shareEmailAccountWithUser = async (accountId, ownerId, targetUserId) => {
+  // Check owner has access
+  await getEmailAccountById(accountId, ownerId);
+
+  // Check target user exists
+  const [targetUser] = await db
+    .select()
+    .from(users)
+    .where(eq(users.id, targetUserId))
+    .limit(1);
+
+  if (!targetUser) {
+    throw new NotFoundError('Cieľový používateľ nenájdený');
+  }
+
+  // Check if target user already has access
+  const [existingLink] = await db
+    .select()
+    .from(userEmailAccounts)
+    .where(
+      and(
+        eq(userEmailAccounts.userId, targetUserId),
+        eq(userEmailAccounts.emailAccountId, accountId)
+      )
+    )
+    .limit(1);
+
+  if (existingLink) {
+    throw new ConflictError('Používateľ už má prístup k tomuto email účtu');
+  }
+
+  // Check if this is the first email account for target user
+  const targetUserAccounts = await getUserEmailAccounts(targetUserId);
+  const isFirst = targetUserAccounts.length === 0;
+
+  // Create link
+  await db.insert(userEmailAccounts).values({
+    userId: targetUserId,
+    emailAccountId: accountId,
+    isPrimary: isFirst,
+  });
+
+  const [account] = await db
+    .select()
+    .from(emailAccounts)
+    .where(eq(emailAccounts.id, accountId))
+    .limit(1);
+
+  return {
+    success: true,
+    message: `Email účet ${account.email} bol zdieľaný s používateľom ${targetUser.username}`,
+    sharedWith: {
+      userId: targetUser.id,
+      username: targetUser.username,
+      firstName: targetUser.firstName,
+      lastName: targetUser.lastName,
+    },
+  };
+};

src/services/jmap.service.js

@@ -123,7 +123,7 @@ export const getIdentities = async (jmapConfig) => {
  * Discover potential contacts from JMAP (no DB storage)
  * Returns list of unique senders
  */
-export const discoverContactsFromJMAP = async (jmapConfig, userId, searchTerm = '', limit = 50) => {
+export const discoverContactsFromJMAP = async (jmapConfig, emailAccountId, searchTerm = '', limit = 50) => {
   try {
     logger.info(`Discovering contacts from JMAP (search: "${searchTerm}")`);
 
@@ -167,11 +167,11 @@ export const discoverContactsFromJMAP = async (jmapConfig, userId, searchTerm =
 
     const emailsList = getResponse.methodResponses[0][1].list;
 
-    // Get existing contacts for this user
+    // Get existing contacts for this email account
     const existingContacts = await db
       .select()
       .from(contacts)
-      .where(eq(contacts.userId, userId));
+      .where(eq(contacts.emailAccountId, emailAccountId));
 
     const contactEmailsSet = new Set(existingContacts.map((c) => c.email.toLowerCase()));
 
@@ -216,7 +216,7 @@ export const discoverContactsFromJMAP = async (jmapConfig, userId, searchTerm =
  * Searches in: from, to, subject, and email body
  * Returns list of unique senders grouped by email address
  */
-export const searchEmailsJMAP = async (jmapConfig, userId, query, limit = 50, offset = 0) => {
+export const searchEmailsJMAP = async (jmapConfig, emailAccountId, query, limit = 50, offset = 0) => {
   try {
     logger.info(`Searching emails in JMAP (query: "${query}", limit: ${limit}, offset: ${offset})`);
 
@@ -296,11 +296,11 @@ export const searchEmailsJMAP = async (jmapConfig, userId, query, limit = 50, of
 
     const emailsList = getResponse.methodResponses[0][1].list;
 
-    // Get existing contacts for this user
+    // Get existing contacts for this email account
     const existingContacts = await db
       .select()
       .from(contacts)
-      .where(eq(contacts.userId, userId));
+      .where(eq(contacts.emailAccountId, emailAccountId));
 
     const contactEmailsSet = new Set(existingContacts.map((c) => c.email.toLowerCase()));
 
@@ -342,30 +342,54 @@ export const searchEmailsJMAP = async (jmapConfig, userId, query, limit = 50, of
 };
 
 /**
- * Sync emails from a specific sender (when adding as contact)
+ * Sync emails with a specific contact (bidirectional: both from and to)
+ * ONLY syncs from Inbox and Sent mailboxes (no Archive, Trash, Drafts)
+ * ONLY syncs recent emails (last 30 days by default)
  */
 export const syncEmailsFromSender = async (
   jmapConfig,
-  userId,
   emailAccountId,
   contactId,
   senderEmail,
   options = {}
 ) => {
-  const { limit = 500 } = options;
+  const { limit = 50, daysBack = 30 } = options;
 
   try {
-    logger.info(`Syncing emails from sender: ${senderEmail} for account ${emailAccountId}`);
+    logger.info(`Syncing emails with contact: ${senderEmail} for account ${emailAccountId}`);
 
-    // Query all emails from this sender
+    // Get Inbox and Sent mailboxes ONLY
-    const queryResponse = await jmapRequest(jmapConfig, [
+    const mailboxes = await getMailboxes(jmapConfig);
+    const inboxMailbox = mailboxes.find(m => m.role === 'inbox' || m.name === 'Inbox' || m.name === 'INBOX');
+    const sentMailbox = mailboxes.find(m => m.role === 'sent' || m.name === 'Sent');
+
+    if (!inboxMailbox) {
+      logger.error('Inbox mailbox not found');
+      throw new Error('Inbox mailbox not found');
+    }
+
+    logger.info(`Using mailboxes: Inbox (${inboxMailbox.id})${sentMailbox ? `, Sent (${sentMailbox.id})` : ''}`);
+
+    // Calculate date threshold (only emails from last X days)
+    const dateThreshold = new Date();
+    dateThreshold.setDate(dateThreshold.getDate() - daysBack);
+    const dateThresholdISO = dateThreshold.toISOString();
+
+    logger.info(`Filtering: last ${daysBack} days, from Inbox/Sent only, for ${senderEmail}`);
+
+    // Query emails FROM the contact
+    const queryFromResponse = await jmapRequest(jmapConfig, [
       [
         'Email/query',
         {
           accountId: jmapConfig.accountId,
           filter: {
-            operator: 'OR',
+            operator: 'AND',
-            conditions: [{ from: senderEmail }, { to: senderEmail }],
+            conditions: [
+              { inMailbox: inboxMailbox.id },
+              { from: senderEmail },
+              { after: dateThresholdISO }
+            ]
           },
           sort: [{ property: 'receivedAt', isAscending: false }],
           limit,
@@ -374,8 +398,39 @@ export const syncEmailsFromSender = async (
       ],
     ]);
 
-    const emailIds = queryResponse.methodResponses[0][1].ids;
+    const fromEmailIds = queryFromResponse.methodResponses[0][1].ids || [];
-    logger.info(`Found ${emailIds.length} emails from ${senderEmail}`);
+    logger.info(`Found ${fromEmailIds.length} emails FROM ${senderEmail}`);
+
+    // Query emails TO the contact (from Sent folder if it exists)
+    let toEmailIds = [];
+    if (sentMailbox) {
+      const queryToResponse = await jmapRequest(jmapConfig, [
+        [
+          'Email/query',
+          {
+            accountId: jmapConfig.accountId,
+            filter: {
+              operator: 'AND',
+              conditions: [
+                { inMailbox: sentMailbox.id },
+                { to: senderEmail },
+                { after: dateThresholdISO }
+              ]
+            },
+            sort: [{ property: 'receivedAt', isAscending: false }],
+            limit,
+          },
+          'query2',
+        ],
+      ]);
+
+      toEmailIds = queryToResponse.methodResponses[0][1].ids || [];
+      logger.info(`Found ${toEmailIds.length} emails TO ${senderEmail}`);
+    }
+
+    // Combine and deduplicate
+    const emailIds = [...new Set([...fromEmailIds, ...toEmailIds])];
+    logger.info(`Total unique emails: ${emailIds.length}`);
 
     if (emailIds.length === 0) {
       return { total: 0, saved: 0 };
@@ -427,6 +482,19 @@ export const syncEmailsFromSender = async (
           continue;
         }
 
+        // VALIDATION: Email must belong to this contact
+        // Email belongs to contact if:
+        // - from === senderEmail (received email FROM contact)
+        // - to === senderEmail (sent email TO contact)
+        const belongsToContact =
+          fromEmail?.toLowerCase() === senderEmail.toLowerCase() ||
+          toEmail?.toLowerCase() === senderEmail.toLowerCase();
+
+        if (!belongsToContact) {
+          logger.warn(`Skipping email ${messageId} - does not belong to contact ${senderEmail} (from: ${fromEmail}, to: ${toEmail})`);
+          continue;
+        }
+
         // Skip if already exists
         const [existing] = await db
           .select()
@@ -440,7 +508,6 @@ export const syncEmailsFromSender = async (
 
         // Save email
         await db.insert(emails).values({
-          userId,
           emailAccountId,
           contactId,
           jmapId: email.id,
@@ -456,6 +523,7 @@ export const syncEmailsFromSender = async (
             '(Empty message)',
           date: email.receivedAt ? new Date(email.receivedAt) : new Date(),
           isRead,
+          sentByUserId: null, // Prijatý email, nie odpoveď
         });
 
         savedCount++;
@@ -464,10 +532,10 @@ export const syncEmailsFromSender = async (
       }
     }
 
-    logger.success(`Synced ${savedCount} new emails from ${senderEmail}`);
+    logger.success(`Synced ${savedCount} new emails with ${senderEmail}`);
     return { total: emailsList.length, saved: savedCount };
   } catch (error) {
-    logger.error('Failed to sync emails from sender', error);
+    logger.error('Failed to sync emails with contact', error);
     throw error;
   }
 };
@@ -636,13 +704,24 @@ export const sendEmail = async (jmapConfig, userId, emailAccountId, to, subject,
 
     logger.success(`Email sent successfully to ${to}`);
 
+    // Find contact by recipient email address to properly link the sent email
+    const [recipientContact] = await db
+      .select()
+      .from(contacts)
+      .where(
+        and(
+          eq(contacts.emailAccountId, emailAccountId),
+          eq(contacts.email, to)
+        )
+      )
+      .limit(1);
+
     // Save sent email to database
     const messageId = `<${Date.now()}.${Math.random().toString(36).substr(2, 9)}@${jmapConfig.username.split('@')[1]}>`;
 
     await db.insert(emails).values({
-      userId,
       emailAccountId,
-      contactId: null, // Will be linked later if recipient is a contact
+      contactId: recipientContact?.id || null, // Link to contact if recipient is in contacts
       jmapId: createdEmailId,
       messageId,
       threadId: threadId || messageId,
@@ -653,8 +732,11 @@ export const sendEmail = async (jmapConfig, userId, emailAccountId, to, subject,
       body,
       date: new Date(),
       isRead: true, // Sent emails are always read
+      sentByUserId: userId, // Track who sent this email
     });
 
+    logger.info(`Sent email linked to contact: ${recipientContact ? recipientContact.id : 'none (not in contacts)'}`);
+
     return { success: true, messageId };
   } catch (error) {
     logger.error('Error sending email', error);

src/utils/errors.js

@@ -20,6 +20,13 @@ export class ValidationError extends AppError {
   }
 }
 
+export class BadRequestError extends AppError {
+  constructor(message = 'Zlá požiadavka') {
+    super(message, 400);
+    this.name = 'BadRequestError';
+  }
+}
+
 export class AuthenticationError extends AppError {
   constructor(message = 'Neautorizovaný prístup') {
     super(message, 401);