FIX (email): Recrate client in case of auth error

FIX (helm): Add git clone step

README.md

@@ -25,6 +25,8 @@
     <a href="https://postgresus.com" target="_blank"><strong>🌐 Postgresus website</strong></a>
   </p>
   
+  <img src="assets/dashboard-dark.svg" alt="Postgresus Dark Dashboard" width="800" style="margin-bottom: 10px;"/>
+
   <img src="assets/dashboard.svg" alt="Postgresus Dashboard" width="800"/>
   
  
@@ -72,6 +74,12 @@
 - **Audit logs**: Track all system activities and changes made by users
 - **User roles**: Assign viewer, member, admin or owner roles within workspaces
 
+### 🎨 **UX-Friendly**
+
+- **Designer-polished UI**: Clean, intuitive interface crafted with attention to detail
+- **Dark & light themes**: Choose the look that suits your workflow
+- **Mobile adaptive**: Check your backups from anywhere on any device
+
 ### 🐳 **Self-Hosted & Secure**
 
 - **Docker-based**: Easy deployment and management
@@ -149,6 +157,49 @@ Then run:
 docker compose up -d
 ```
 
+### Option 4: Kubernetes with Helm
+
+For Kubernetes deployments, use the official Helm chart.
+
+**Step 1:** Clone the repository:
+
+```bash
+git clone https://github.com/RostislavDugin/postgresus.git
+cd postgresus
+```
+
+**Step 2:** Install with Helm:
+
+```bash
+helm install postgresus ./deploy/postgresus -n postgresus --create-namespace
+```
+
+To customize the installation, create a `values.yaml` file:
+
+```yaml
+ingress:
+  hosts:
+    - host: backup.yourdomain.com
+      paths:
+        - path: /
+          pathType: Prefix
+  tls:
+    - secretName: backup-yourdomain-com-tls
+      hosts:
+        - backup.yourdomain.com
+
+persistence:
+  size: 20Gi
+```
+
+Then install with your custom values:
+
+```bash
+helm install postgresus ./deploy/postgresus -n postgresus --create-namespace -f values.yaml
+```
+
+See the [Helm chart README](deploy/postgresus/README.md) for all configuration options.
+
 ---
 
 ## 🚀 Usage

backend/internal/features/backups/backups/usecases/postgresql/create_backup_uc.go

@@ -719,11 +719,15 @@ func (uc *CreatePostgresqlBackupUsecase) createTempPgpassFile(
 		return "", nil
 	}
 
+	escapedHost := tools.EscapePgpassField(pgConfig.Host)
+	escapedUsername := tools.EscapePgpassField(pgConfig.Username)
+	escapedPassword := tools.EscapePgpassField(password)
+
 	pgpassContent := fmt.Sprintf("%s:%d:*:%s:%s",
-		pgConfig.Host,
+		escapedHost,
 		pgConfig.Port,
-		pgConfig.Username,
-		password,
+		escapedUsername,
+		escapedPassword,
 	)
 
 	tempDir, err := os.MkdirTemp("", "pgpass")

backend/internal/features/databases/databases/postgresql/model.go

@@ -593,7 +593,8 @@ func buildConnectionStringForDB(p *PostgresqlDatabase, dbName string, password s
 		sslMode = "require"
 	}
 
-	return fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
+	return fmt.Sprintf(
+		"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s default_query_exec_mode=simple_protocol",
 		p.Host,
 		p.Port,
 		p.Username,

backend/internal/features/notifiers/models/email_notifier/auth.go

@@ -0,0 +1,28 @@
+package email_notifier
+
+import (
+	"errors"
+	"net/smtp"
+)
+
+type loginAuth struct {
+	username, password string
+}
+
+func (a *loginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {
+	return "LOGIN", []byte{}, nil
+}
+
+func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
+	if more {
+		switch string(fromServer) {
+		case "Username:":
+			return []byte(a.username), nil
+		case "Password:":
+			return []byte(a.password), nil
+		default:
+			return nil, errors.New("unknown LOGIN challenge: " + string(fromServer))
+		}
+	}
+	return nil, nil
+}

backend/internal/features/notifiers/models/email_notifier/model.go

@@ -58,11 +58,10 @@ func (e *EmailNotifier) Validate(encryptor encryption.FieldEncryptor) error {
 
 func (e *EmailNotifier) Send(
 	encryptor encryption.FieldEncryptor,
-	logger *slog.Logger,
+	_ *slog.Logger,
 	heading string,
 	message string,
 ) error {
-	// Decrypt SMTP password if provided
 	var smtpPassword string
 	if e.SMTPPassword != "" {
 		decrypted, err := encryptor.Decrypt(e.NotifierID, e.SMTPPassword)
@@ -72,7 +71,6 @@ func (e *EmailNotifier) Send(
 		smtpPassword = decrypted
 	}
 
-	// Compose email
 	from := e.From
 	if from == "" {
 		from = e.SMTPUser
@@ -81,153 +79,13 @@ func (e *EmailNotifier) Send(
 		}
 	}
 
-	to := []string{e.TargetEmail}
-
-	// Format the email content
-	subject := fmt.Sprintf("Subject: %s\r\n", heading)
-	mime := fmt.Sprintf(
-		"MIME-version: 1.0;\nContent-Type: %s; charset=\"%s\";\n\n",
-		MIMETypeHTML,
-		MIMECharsetUTF8,
-	)
-	body := message
-	fromHeader := fmt.Sprintf("From: %s\r\n", from)
-	toHeader := fmt.Sprintf("To: %s\r\n", e.TargetEmail)
-
-	// Combine all parts of the email
-	emailContent := []byte(fromHeader + toHeader + subject + mime + body)
-
-	addr := net.JoinHostPort(e.SMTPHost, fmt.Sprintf("%d", e.SMTPPort))
-	timeout := DefaultTimeout
-
-	// Determine if authentication is required
+	emailContent := e.buildEmailContent(heading, message, from)
 	isAuthRequired := e.SMTPUser != "" && smtpPassword != ""
 
-	// Handle different port scenarios
 	if e.SMTPPort == ImplicitTLSPort {
-		// Implicit TLS (port 465)
-		// Set up TLS config
-		tlsConfig := &tls.Config{
-			ServerName: e.SMTPHost,
-		}
-
-		// Dial with timeout
-		dialer := &net.Dialer{Timeout: timeout}
-		conn, err := tls.DialWithDialer(dialer, "tcp", addr, tlsConfig)
-		if err != nil {
-			return fmt.Errorf("failed to connect to SMTP server: %w", err)
-		}
-		defer func() {
-			_ = conn.Close()
-		}()
-
-		// Create SMTP client
-		client, err := smtp.NewClient(conn, e.SMTPHost)
-		if err != nil {
-			return fmt.Errorf("failed to create SMTP client: %w", err)
-		}
-		defer func() {
-			_ = client.Quit()
-		}()
-
-		// Set up authentication only if credentials are provided
-		if isAuthRequired {
-			auth := smtp.PlainAuth("", e.SMTPUser, smtpPassword, e.SMTPHost)
-			if err := client.Auth(auth); err != nil {
-				return fmt.Errorf("SMTP authentication failed: %w", err)
-			}
-		}
-
-		// Set sender and recipients
-		if err := client.Mail(from); err != nil {
-			return fmt.Errorf("failed to set sender: %w", err)
-		}
-		for _, recipient := range to {
-			if err := client.Rcpt(recipient); err != nil {
-				return fmt.Errorf("failed to set recipient: %w", err)
-			}
-		}
-
-		// Send the email body
-		writer, err := client.Data()
-		if err != nil {
-			return fmt.Errorf("failed to get data writer: %w", err)
-		}
-		_, err = writer.Write(emailContent)
-		if err != nil {
-			return fmt.Errorf("failed to write email content: %w", err)
-		}
-		err = writer.Close()
-		if err != nil {
-			return fmt.Errorf("failed to close data writer: %w", err)
-		}
-
-		return nil
-	} else {
-		// STARTTLS (port 587) or other ports
-		// Create a custom dialer with timeout
-		dialer := &net.Dialer{Timeout: timeout}
-		conn, err := dialer.Dial("tcp", addr)
-		if err != nil {
-			return fmt.Errorf("failed to connect to SMTP server: %w", err)
-		}
-
-		// Create client from connection
-		client, err := smtp.NewClient(conn, e.SMTPHost)
-		if err != nil {
-			return fmt.Errorf("failed to create SMTP client: %w", err)
-		}
-		defer func() {
-			_ = client.Quit()
-		}()
-
-		// Send email using the client
-		if err := client.Hello(DefaultHelloName); err != nil {
-			return fmt.Errorf("SMTP hello failed: %w", err)
-		}
-
-		// Start TLS if available
-		if ok, _ := client.Extension("STARTTLS"); ok {
-			if err := client.StartTLS(&tls.Config{ServerName: e.SMTPHost}); err != nil {
-				return fmt.Errorf("STARTTLS failed: %w", err)
-			}
-		}
-
-		// Authenticate only if credentials are provided
-		if isAuthRequired {
-			auth := smtp.PlainAuth("", e.SMTPUser, smtpPassword, e.SMTPHost)
-			if err := client.Auth(auth); err != nil {
-				return fmt.Errorf("SMTP authentication failed: %w", err)
-			}
-		}
-
-		if err := client.Mail(from); err != nil {
-			return fmt.Errorf("failed to set sender: %w", err)
-		}
-
-		for _, recipient := range to {
-			if err := client.Rcpt(recipient); err != nil {
-				return fmt.Errorf("failed to set recipient: %w", err)
-			}
-		}
-
-		writer, err := client.Data()
-		if err != nil {
-			return fmt.Errorf("failed to get data writer: %w", err)
-		}
-
-		_, err = writer.Write(emailContent)
-		if err != nil {
-			return fmt.Errorf("failed to write email content: %w", err)
-		}
-
-		err = writer.Close()
-		if err != nil {
-			return fmt.Errorf("failed to close data writer: %w", err)
-		}
-
-		return client.Quit()
+		return e.sendImplicitTLS(emailContent, from, smtpPassword, isAuthRequired)
 	}
+	return e.sendStartTLS(emailContent, from, smtpPassword, isAuthRequired)
 }
 
 func (e *EmailNotifier) HideSensitiveData() {
@@ -256,3 +114,166 @@ func (e *EmailNotifier) EncryptSensitiveData(encryptor encryption.FieldEncryptor
 	}
 	return nil
 }
+
+func (e *EmailNotifier) buildEmailContent(heading, message, from string) []byte {
+	subject := fmt.Sprintf("Subject: %s\r\n", heading)
+	mime := fmt.Sprintf(
+		"MIME-version: 1.0;\nContent-Type: %s; charset=\"%s\";\n\n",
+		MIMETypeHTML,
+		MIMECharsetUTF8,
+	)
+	fromHeader := fmt.Sprintf("From: %s\r\n", from)
+	toHeader := fmt.Sprintf("To: %s\r\n", e.TargetEmail)
+	return []byte(fromHeader + toHeader + subject + mime + message)
+}
+
+func (e *EmailNotifier) sendImplicitTLS(
+	emailContent []byte,
+	from string,
+	password string,
+	isAuthRequired bool,
+) error {
+	createClient := func() (*smtp.Client, func(), error) {
+		return e.createImplicitTLSClient()
+	}
+
+	client, cleanup, err := e.authenticateWithRetry(createClient, password, isAuthRequired)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	return e.sendEmail(client, from, emailContent)
+}
+
+func (e *EmailNotifier) sendStartTLS(
+	emailContent []byte,
+	from string,
+	password string,
+	isAuthRequired bool,
+) error {
+	createClient := func() (*smtp.Client, func(), error) {
+		return e.createStartTLSClient()
+	}
+
+	client, cleanup, err := e.authenticateWithRetry(createClient, password, isAuthRequired)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	return e.sendEmail(client, from, emailContent)
+}
+
+func (e *EmailNotifier) createImplicitTLSClient() (*smtp.Client, func(), error) {
+	addr := net.JoinHostPort(e.SMTPHost, fmt.Sprintf("%d", e.SMTPPort))
+	tlsConfig := &tls.Config{ServerName: e.SMTPHost}
+	dialer := &net.Dialer{Timeout: DefaultTimeout}
+
+	conn, err := tls.DialWithDialer(dialer, "tcp", addr, tlsConfig)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to connect to SMTP server: %w", err)
+	}
+
+	client, err := smtp.NewClient(conn, e.SMTPHost)
+	if err != nil {
+		_ = conn.Close()
+		return nil, nil, fmt.Errorf("failed to create SMTP client: %w", err)
+	}
+
+	return client, func() { _ = client.Quit() }, nil
+}
+
+func (e *EmailNotifier) createStartTLSClient() (*smtp.Client, func(), error) {
+	addr := net.JoinHostPort(e.SMTPHost, fmt.Sprintf("%d", e.SMTPPort))
+	dialer := &net.Dialer{Timeout: DefaultTimeout}
+
+	conn, err := dialer.Dial("tcp", addr)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to connect to SMTP server: %w", err)
+	}
+
+	client, err := smtp.NewClient(conn, e.SMTPHost)
+	if err != nil {
+		_ = conn.Close()
+		return nil, nil, fmt.Errorf("failed to create SMTP client: %w", err)
+	}
+
+	if err := client.Hello(DefaultHelloName); err != nil {
+		_ = client.Quit()
+		_ = conn.Close()
+		return nil, nil, fmt.Errorf("SMTP hello failed: %w", err)
+	}
+
+	if ok, _ := client.Extension("STARTTLS"); ok {
+		if err := client.StartTLS(&tls.Config{ServerName: e.SMTPHost}); err != nil {
+			_ = client.Quit()
+			_ = conn.Close()
+			return nil, nil, fmt.Errorf("STARTTLS failed: %w", err)
+		}
+	}
+
+	return client, func() { _ = client.Quit() }, nil
+}
+
+func (e *EmailNotifier) authenticateWithRetry(
+	createClient func() (*smtp.Client, func(), error),
+	password string,
+	isAuthRequired bool,
+) (*smtp.Client, func(), error) {
+	client, cleanup, err := createClient()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if !isAuthRequired {
+		return client, cleanup, nil
+	}
+
+	// Try PLAIN auth first
+	plainAuth := smtp.PlainAuth("", e.SMTPUser, password, e.SMTPHost)
+	if err := client.Auth(plainAuth); err == nil {
+		return client, cleanup, nil
+	}
+
+	// PLAIN auth failed, connection may be closed - recreate and try LOGIN auth
+	cleanup()
+
+	client, cleanup, err = createClient()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	loginAuth := &loginAuth{username: e.SMTPUser, password: password}
+	if err := client.Auth(loginAuth); err != nil {
+		cleanup()
+		return nil, nil, fmt.Errorf("SMTP authentication failed: %w", err)
+	}
+
+	return client, cleanup, nil
+}
+
+func (e *EmailNotifier) sendEmail(client *smtp.Client, from string, content []byte) error {
+	if err := client.Mail(from); err != nil {
+		return fmt.Errorf("failed to set sender: %w", err)
+	}
+
+	if err := client.Rcpt(e.TargetEmail); err != nil {
+		return fmt.Errorf("failed to set recipient: %w", err)
+	}
+
+	writer, err := client.Data()
+	if err != nil {
+		return fmt.Errorf("failed to get data writer: %w", err)
+	}
+
+	if _, err = writer.Write(content); err != nil {
+		return fmt.Errorf("failed to write email content: %w", err)
+	}
+
+	if err = writer.Close(); err != nil {
+		return fmt.Errorf("failed to close data writer: %w", err)
+	}
+
+	return nil
+}

backend/internal/features/notifiers/models/webhook/model.go

@@ -10,20 +10,57 @@ import (
 	"net/http"
 	"net/url"
 	"postgresus-backend/internal/util/encryption"
+	"strings"
 
 	"github.com/google/uuid"
+	"gorm.io/gorm"
 )
 
+type WebhookHeader struct {
+	Key   string `json:"key"`
+	Value string `json:"value"`
+}
+
 type WebhookNotifier struct {
 	NotifierID    uuid.UUID     `json:"notifierId"    gorm:"primaryKey;column:notifier_id"`
 	WebhookURL    string        `json:"webhookUrl"    gorm:"not null;column:webhook_url"`
 	WebhookMethod WebhookMethod `json:"webhookMethod" gorm:"not null;column:webhook_method"`
+	BodyTemplate  *string       `json:"bodyTemplate"  gorm:"column:body_template;type:text"`
+	HeadersJSON   string        `json:"-"             gorm:"column:headers;type:text"`
+
+	Headers []WebhookHeader `json:"headers" gorm:"-"`
 }
 
 func (t *WebhookNotifier) TableName() string {
 	return "webhook_notifiers"
 }
 
+func (t *WebhookNotifier) BeforeSave(_ *gorm.DB) error {
+	if len(t.Headers) > 0 {
+		data, err := json.Marshal(t.Headers)
+
+		if err != nil {
+			return err
+		}
+
+		t.HeadersJSON = string(data)
+	} else {
+		t.HeadersJSON = "[]"
+	}
+
+	return nil
+}
+
+func (t *WebhookNotifier) AfterFind(_ *gorm.DB) error {
+	if t.HeadersJSON != "" {
+		if err := json.Unmarshal([]byte(t.HeadersJSON), &t.Headers); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func (t *WebhookNotifier) Validate(encryptor encryption.FieldEncryptor) error {
 	if t.WebhookURL == "" {
 		return errors.New("webhook URL is required")
@@ -49,66 +86,9 @@ func (t *WebhookNotifier) Send(
 
 	switch t.WebhookMethod {
 	case WebhookMethodGET:
-		reqURL := fmt.Sprintf("%s?heading=%s&message=%s",
-			webhookURL,
-			url.QueryEscape(heading),
-			url.QueryEscape(message),
-		)
-
-		resp, err := http.Get(reqURL)
-		if err != nil {
-			return fmt.Errorf("failed to send GET webhook: %w", err)
-		}
-		defer func() {
-			if cerr := resp.Body.Close(); cerr != nil {
-				logger.Error("failed to close response body", "error", cerr)
-			}
-		}()
-
-		if resp.StatusCode < 200 || resp.StatusCode >= 300 {
-			body, _ := io.ReadAll(resp.Body)
-			return fmt.Errorf(
-				"webhook GET returned status: %s, body: %s",
-				resp.Status,
-				string(body),
-			)
-		}
-
-		return nil
-
+		return t.sendGET(webhookURL, heading, message, logger)
 	case WebhookMethodPOST:
-		payload := map[string]string{
-			"heading": heading,
-			"message": message,
-		}
-
-		body, err := json.Marshal(payload)
-		if err != nil {
-			return fmt.Errorf("failed to marshal webhook payload: %w", err)
-		}
-
-		resp, err := http.Post(webhookURL, "application/json", bytes.NewReader(body))
-		if err != nil {
-			return fmt.Errorf("failed to send POST webhook: %w", err)
-		}
-
-		defer func() {
-			if cerr := resp.Body.Close(); cerr != nil {
-				logger.Error("failed to close response body", "error", cerr)
-			}
-		}()
-
-		if resp.StatusCode < 200 || resp.StatusCode >= 300 {
-			body, _ := io.ReadAll(resp.Body)
-			return fmt.Errorf(
-				"webhook POST returned status: %s, body: %s",
-				resp.Status,
-				string(body),
-			)
-		}
-
-		return nil
-
+		return t.sendPOST(webhookURL, heading, message, logger)
 	default:
 		return fmt.Errorf("unsupported webhook method: %s", t.WebhookMethod)
 	}
@@ -120,15 +100,130 @@ func (t *WebhookNotifier) HideSensitiveData() {
 func (t *WebhookNotifier) Update(incoming *WebhookNotifier) {
 	t.WebhookURL = incoming.WebhookURL
 	t.WebhookMethod = incoming.WebhookMethod
+	t.BodyTemplate = incoming.BodyTemplate
+	t.Headers = incoming.Headers
 }
 
 func (t *WebhookNotifier) EncryptSensitiveData(encryptor encryption.FieldEncryptor) error {
 	if t.WebhookURL != "" {
 		encrypted, err := encryptor.Encrypt(t.NotifierID, t.WebhookURL)
+
 		if err != nil {
 			return fmt.Errorf("failed to encrypt webhook URL: %w", err)
 		}
+
 		t.WebhookURL = encrypted
 	}
+
 	return nil
 }
+
+func (t *WebhookNotifier) sendGET(webhookURL, heading, message string, logger *slog.Logger) error {
+	reqURL := fmt.Sprintf("%s?heading=%s&message=%s",
+		webhookURL,
+		url.QueryEscape(heading),
+		url.QueryEscape(message),
+	)
+
+	req, err := http.NewRequest(http.MethodGet, reqURL, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create GET request: %w", err)
+	}
+
+	t.applyHeaders(req)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to send GET webhook: %w", err)
+	}
+
+	defer func() {
+		if cerr := resp.Body.Close(); cerr != nil {
+			logger.Error("failed to close response body", "error", cerr)
+		}
+	}()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf(
+			"webhook GET returned status: %s, body: %s",
+			resp.Status,
+			string(body),
+		)
+	}
+
+	return nil
+}
+
+func (t *WebhookNotifier) sendPOST(webhookURL, heading, message string, logger *slog.Logger) error {
+	body := t.buildRequestBody(heading, message)
+
+	req, err := http.NewRequest(http.MethodPost, webhookURL, bytes.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("failed to create POST request: %w", err)
+	}
+
+	hasContentType := false
+
+	for _, h := range t.Headers {
+		if strings.EqualFold(h.Key, "Content-Type") {
+			hasContentType = true
+			break
+		}
+	}
+
+	if !hasContentType {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	t.applyHeaders(req)
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to send POST webhook: %w", err)
+	}
+
+	defer func() {
+		if cerr := resp.Body.Close(); cerr != nil {
+			logger.Error("failed to close response body", "error", cerr)
+		}
+	}()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		respBody, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf(
+			"webhook POST returned status: %s, body: %s",
+			resp.Status,
+			string(respBody),
+		)
+	}
+
+	return nil
+}
+
+func (t *WebhookNotifier) buildRequestBody(heading, message string) []byte {
+	if t.BodyTemplate != nil && *t.BodyTemplate != "" {
+		result := *t.BodyTemplate
+		result = strings.ReplaceAll(result, "{{heading}}", heading)
+		result = strings.ReplaceAll(result, "{{message}}", message)
+		return []byte(result)
+	}
+
+	payload := map[string]string{
+		"heading": heading,
+		"message": message,
+	}
+	body, _ := json.Marshal(payload)
+
+	return body
+}
+
+func (t *WebhookNotifier) applyHeaders(req *http.Request) {
+	for _, h := range t.Headers {
+		if h.Key != "" {
+			req.Header.Set(h.Key, h.Value)
+		}
+	}
+}

backend/internal/features/restores/usecases/postgresql/restore_backup_uc.go

@@ -564,11 +564,15 @@ func (uc *RestorePostgresqlBackupUsecase) createTempPgpassFile(
 		return "", nil
 	}
 
+	escapedHost := tools.EscapePgpassField(pgConfig.Host)
+	escapedUsername := tools.EscapePgpassField(pgConfig.Username)
+	escapedPassword := tools.EscapePgpassField(password)
+
 	pgpassContent := fmt.Sprintf("%s:%d:*:%s:%s",
-		pgConfig.Host,
+		escapedHost,
 		pgConfig.Port,
-		pgConfig.Username,
-		password,
+		escapedUsername,
+		escapedPassword,
 	)
 
 	tempDir, err := os.MkdirTemp("", "pgpass")

backend/internal/util/tools/postgresql.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime"
+	"strings"
 
 	env_utils "postgresus-backend/internal/util/env"
 )
@@ -151,6 +152,24 @@ func VerifyPostgresesInstallation(
 	logger.Info("All PostgreSQL version-specific client tools verification completed successfully!")
 }
 
+// EscapePgpassField escapes special characters in a field value for .pgpass file format.
+// According to PostgreSQL documentation, the .pgpass file format requires:
+// - Backslash (\) must be escaped as \\
+// - Colon (:) must be escaped as \:
+// Additionally, newlines and carriage returns are removed to prevent format corruption.
+func EscapePgpassField(field string) string {
+	// Remove newlines and carriage returns that would break .pgpass format
+	field = strings.ReplaceAll(field, "\r", "")
+	field = strings.ReplaceAll(field, "\n", "")
+
+	// Escape backslashes first (order matters!)
+	// Then escape colons
+	field = strings.ReplaceAll(field, "\\", "\\\\")
+	field = strings.ReplaceAll(field, ":", "\\:")
+
+	return field
+}
+
 func getPostgresqlBasePath(
 	version PostgresqlVersion,
 	envMode env_utils.EnvMode,

backend/migrations/20251128120000_add_webhook_headers_and_body_template.sql

@@ -0,0 +1,18 @@
+-- +goose Up
+-- +goose StatementBegin
+
+ALTER TABLE webhook_notifiers
+    ADD COLUMN body_template TEXT,
+    ADD COLUMN headers       TEXT DEFAULT '[]';
+
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+
+ALTER TABLE webhook_notifiers
+    DROP COLUMN body_template,
+    DROP COLUMN headers;
+
+-- +goose StatementEnd
+

deploy/postgresus/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

deploy/postgresus/Chart.yaml

@@ -0,0 +1,12 @@
+apiVersion: v2
+name: postgresus
+description: A Helm chart for Postgresus - PostgreSQL backup and management system
+type: application
+version: 1.0.0
+appVersion: "v1.45.3"
+keywords:
+  - postgresql
+  - backup
+  - database
+  - restore
+home: https://github.com/RostislavDugin/postgresus

deploy/postgresus/README.md

@@ -0,0 +1,84 @@
+# Postgresus Helm Chart
+
+## Installation
+
+```bash
+helm install postgresus ./deploy/postgresus -n postgresus --create-namespace
+```
+
+## Configuration
+
+### Main Parameters
+
+| Parameter          | Description        | Default Value               |
+| ------------------ | ------------------ | --------------------------- |
+| `namespace.create` | Create namespace   | `true`                      |
+| `namespace.name`   | Namespace name     | `postgresus`                |
+| `image.repository` | Docker image       | `rostislavdugin/postgresus` |
+| `image.tag`        | Image tag          | `latest`                    |
+| `image.pullPolicy` | Image pull policy  | `Always`                    |
+| `replicaCount`     | Number of replicas | `1`                         |
+
+### Resources
+
+| Parameter                   | Description    | Default Value |
+| --------------------------- | -------------- | ------------- |
+| `resources.requests.memory` | Memory request | `1Gi`         |
+| `resources.requests.cpu`    | CPU request    | `500m`        |
+| `resources.limits.memory`   | Memory limit   | `1Gi`         |
+| `resources.limits.cpu`      | CPU limit      | `500m`        |
+
+### Storage
+
+| Parameter                      | Description               | Default Value          |
+| ------------------------------ | ------------------------- | ---------------------- |
+| `persistence.enabled`          | Enable persistent storage | `true`                 |
+| `persistence.storageClassName` | Storage class             | `""` (cluster default) |
+| `persistence.accessMode`       | Access mode               | `ReadWriteOnce`        |
+| `persistence.size`             | Storage size              | `10Gi`                 |
+| `persistence.mountPath`        | Mount path                | `/postgresus-data`     |
+
+### Service
+
+| Parameter                  | Description             | Default Value |
+| -------------------------- | ----------------------- | ------------- |
+| `service.type`             | Service type            | `ClusterIP`   |
+| `service.port`             | Service port            | `4005`        |
+| `service.targetPort`       | Target port             | `4005`        |
+| `service.headless.enabled` | Enable headless service | `true`        |
+
+### Ingress
+
+| Parameter               | Description       | Default Value            |
+| ----------------------- | ----------------- | ------------------------ |
+| `ingress.enabled`       | Enable Ingress    | `true`                   |
+| `ingress.className`     | Ingress class     | `nginx`                  |
+| `ingress.hosts[0].host` | Hostname          | `postgresus.example.com` |
+| `ingress.tls`           | TLS configuration | See values.yaml          |
+
+### Health Checks
+
+| Parameter                | Description            | Default Value |
+| ------------------------ | ---------------------- | ------------- |
+| `livenessProbe.enabled`  | Enable liveness probe  | `true`        |
+| `readinessProbe.enabled` | Enable readiness probe | `true`        |
+
+## Custom Ingress Example
+
+```yaml
+# custom-values.yaml
+ingress:
+  hosts:
+    - host: backup.example.com
+      paths:
+        - path: /
+          pathType: Prefix
+  tls:
+    - secretName: backup-example-com-tls
+      hosts:
+        - backup.example.com
+```
+
+```bash
+helm install postgresus ./deploy/postgresus -n postgresus --create-namespace -f custom-values.yaml
+```

deploy/postgresus/helm/_helpers.tpl

@@ -0,0 +1,72 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "postgresus.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+*/}}
+{{- define "postgresus.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "postgresus.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "postgresus.labels" -}}
+helm.sh/chart: {{ include "postgresus.chart" . }}
+{{ include "postgresus.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "postgresus.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "postgresus.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app: postgresus
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "postgresus.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "postgresus.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+Namespace
+*/}}
+{{- define "postgresus.namespace" -}}
+{{- if .Values.namespace.create }}
+{{- .Values.namespace.name }}
+{{- else }}
+{{- .Release.Namespace }}
+{{- end }}
+{{- end }}

deploy/postgresus/helm/ingress.yaml

@@ -0,0 +1,42 @@
+{{- if .Values.ingress.enabled -}}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ include "postgresus.fullname" . }}-ingress
+  namespace: {{ include "postgresus.namespace" . }}
+  labels:
+    {{- include "postgresus.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if .Values.ingress.className }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            pathType: {{ .pathType }}
+            backend:
+              service:
+                name: {{ include "postgresus.fullname" $ }}-service
+                port:
+                  number: {{ $.Values.service.port }}
+          {{- end }}
+    {{- end }}
+{{- end }}

deploy/postgresus/helm/namespace.yaml

@@ -0,0 +1,8 @@
+{{- if .Values.namespace.create }}
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: {{ .Values.namespace.name }}
+  labels:
+    {{- include "postgresus.labels" . | nindent 4 }}
+{{- end }}

deploy/postgresus/helm/service.yaml

@@ -0,0 +1,36 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "postgresus.fullname" . }}-service
+  namespace: {{ include "postgresus.namespace" . }}
+  labels:
+    {{- include "postgresus.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.targetPort }}
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "postgresus.selectorLabels" . | nindent 4 }}
+---
+{{- if .Values.service.headless.enabled }}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "postgresus.fullname" . }}-headless
+  namespace: {{ include "postgresus.namespace" . }}
+  labels:
+    {{- include "postgresus.labels" . | nindent 4 }}
+spec:
+  type: ClusterIP
+  clusterIP: None
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.targetPort }}
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "postgresus.selectorLabels" . | nindent 4 }}
+{{- end }}

deploy/postgresus/helm/statefulset.yaml

@@ -0,0 +1,82 @@
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: {{ include "postgresus.fullname" . }}
+  namespace: {{ include "postgresus.namespace" . }}
+  labels:
+    {{- include "postgresus.labels" . | nindent 4 }}
+spec:
+  serviceName: {{ include "postgresus.fullname" . }}-headless
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "postgresus.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      annotations:
+        {{- with .Values.podAnnotations }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+      labels:
+        {{- include "postgresus.selectorLabels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.service.targetPort }}
+              protocol: TCP
+          volumeMounts:
+            - name: postgresus-storage
+              mountPath: {{ .Values.persistence.mountPath }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          {{- if .Values.livenessProbe.enabled }}
+          livenessProbe:
+            {{- toYaml .Values.livenessProbe.httpGet | nindent 12 }}
+            initialDelaySeconds: {{ .Values.livenessProbe.initialDelaySeconds }}
+            periodSeconds: {{ .Values.livenessProbe.periodSeconds }}
+            timeoutSeconds: {{ .Values.livenessProbe.timeoutSeconds }}
+            failureThreshold: {{ .Values.livenessProbe.failureThreshold }}
+          {{- end }}
+          {{- if .Values.readinessProbe.enabled }}
+          readinessProbe:
+            {{- toYaml .Values.readinessProbe.httpGet | nindent 12 }}
+            initialDelaySeconds: {{ .Values.readinessProbe.initialDelaySeconds }}
+            periodSeconds: {{ .Values.readinessProbe.periodSeconds }}
+            timeoutSeconds: {{ .Values.readinessProbe.timeoutSeconds }}
+            failureThreshold: {{ .Values.readinessProbe.failureThreshold }}
+          {{- end }}
+  {{- if .Values.persistence.enabled }}
+  volumeClaimTemplates:
+    - metadata:
+        name: postgresus-storage
+      spec:
+        accessModes:
+          - {{ .Values.persistence.accessMode }}
+        {{- if .Values.persistence.storageClassName }}
+        storageClassName: {{ .Values.persistence.storageClassName }}
+        {{- end }}
+        resources:
+          requests:
+            storage: {{ .Values.persistence.size }}
+  {{- end }}
+  updateStrategy:
+    {{- toYaml .Values.updateStrategy | nindent 4 }}

deploy/postgresus/values.yaml

@@ -0,0 +1,111 @@
+# Default values for postgresus
+
+# Namespace configuration
+namespace:
+  create: true
+  name: postgresus
+
+# Image configuration
+image:
+  repository: rostislavdugin/postgresus
+  tag: latest
+  pullPolicy: Always
+
+# StatefulSet configuration
+replicaCount: 1
+
+# Service configuration
+service:
+  type: ClusterIP
+  port: 4005
+  targetPort: 4005
+  # Headless service for StatefulSet
+  headless:
+    enabled: true
+
+# Resource limits and requests
+resources:
+  requests:
+    memory: "1Gi"
+    cpu: "500m"
+  limits:
+    memory: "1Gi"
+    cpu: "500m"
+
+# Persistent storage configuration
+persistence:
+  enabled: true
+  # Storage class name. Leave empty to use cluster default.
+  # Examples: "longhorn", "standard", "gp2", etc.
+  storageClassName: ""
+  accessMode: ReadWriteOnce
+  size: 10Gi
+  # Mount path in container
+  mountPath: /postgresus-data
+
+# Ingress configuration
+ingress:
+  enabled: true
+  className: nginx
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+    nginx.ingress.kubernetes.io/use-http2: "true"
+    # Gzip settings
+    nginx.ingress.kubernetes.io/enable-gzip: "true"
+    nginx.ingress.kubernetes.io/gzip-types: "text/plain text/css application/json application/javascript text/javascript text/xml application/xml application/xml+rss image/svg+xml"
+    nginx.ingress.kubernetes.io/gzip-min-length: "1000"
+    nginx.ingress.kubernetes.io/gzip-level: "9"
+    nginx.ingress.kubernetes.io/gzip-buffers: "16 8k"
+    nginx.ingress.kubernetes.io/gzip-http-version: "1.1"
+    nginx.ingress.kubernetes.io/gzip-vary: "on"
+    # Cert-manager settings
+    cert-manager.io/cluster-issuer: "clusteriissuer-letsencrypt"
+    cert-manager.io/duration: "2160h"
+    cert-manager.io/renew-before: "360h"
+  hosts:
+    - host: postgresus.example.com
+      paths:
+        - path: /
+          pathType: Prefix
+  tls:
+    - secretName: postgresus.example.com-tls
+      hosts:
+        - postgresus.example.com
+
+# Health checks configuration
+# Note: The application only has /api/v1/system/health endpoint
+livenessProbe:
+  enabled: true
+  httpGet:
+    path: /api/v1/system/health
+    port: 4005
+  initialDelaySeconds: 30
+  periodSeconds: 10
+  timeoutSeconds: 5
+  failureThreshold: 3
+
+readinessProbe:
+  enabled: true
+  httpGet:
+    path: /api/v1/system/health
+    port: 4005
+  initialDelaySeconds: 10
+  periodSeconds: 5
+  timeoutSeconds: 3
+  failureThreshold: 3
+
+# StatefulSet update strategy
+updateStrategy:
+  type: RollingUpdate
+  rollingUpdate:
+    partition: 0
+
+# Pod labels and annotations
+podLabels: {}
+podAnnotations: {}
+
+# Node selector, tolerations and affinity
+nodeSelector: {}
+tolerations: []
+affinity: {}

frontend/src/App.tsx

@@ -1,4 +1,4 @@
-import { App as AntdApp, ConfigProvider } from 'antd';
+import { App as AntdApp, ConfigProvider, theme } from 'antd';
 import { useEffect, useState } from 'react';
 import { BrowserRouter, Route } from 'react-router';
 import { Routes } from 'react-router';
@@ -7,10 +7,12 @@ import { userApi } from './entity/users';
 import { AuthPageComponent } from './pages/AuthPageComponent';
 import { OAuthCallbackPage } from './pages/OAuthCallbackPage';
 import { OauthStorageComponent } from './pages/OauthStorageComponent';
+import { ThemeProvider, useTheme } from './shared/theme';
 import { MainScreenComponent } from './widgets/main/MainScreenComponent';
 
-function App() {
+function AppContent() {
   const [isAuthorized, setIsAuthorized] = useState(false);
+  const { resolvedTheme } = useTheme();
 
   useEffect(() => {
     const isAuthorized = userApi.isAuthorized();
@@ -24,6 +26,7 @@ function App() {
   return (
     <ConfigProvider
       theme={{
+        algorithm: resolvedTheme === 'dark' ? theme.darkAlgorithm : theme.defaultAlgorithm,
         token: {
           colorPrimary: '#155dfc', // Tailwind blue-600
         },
@@ -45,4 +48,12 @@ function App() {
   );
 }
 
+function App() {
+  return (
+    <ThemeProvider>
+      <AppContent />
+    </ThemeProvider>
+  );
+}
+
 export default App;

frontend/src/entity/notifiers/index.ts

@@ -9,6 +9,7 @@ export type { TelegramNotifier } from './models/telegram/TelegramNotifier';
 export { validateTelegramNotifier } from './models/telegram/validateTelegramNotifier';
 
 export type { WebhookNotifier } from './models/webhook/WebhookNotifier';
+export type { WebhookHeader } from './models/webhook/WebhookHeader';
 export { validateWebhookNotifier } from './models/webhook/validateWebhookNotifier';
 export { WebhookMethod } from './models/webhook/WebhookMethod';
 

frontend/src/entity/notifiers/models/webhook/WebhookHeader.ts

@@ -0,0 +1,4 @@
+export interface WebhookHeader {
+  key: string;
+  value: string;
+}

frontend/src/entity/notifiers/models/webhook/WebhookNotifier.ts

@@ -1,6 +1,9 @@
+import type { WebhookHeader } from './WebhookHeader';
 import type { WebhookMethod } from './WebhookMethod';
 
 export interface WebhookNotifier {
   webhookUrl: string;
   webhookMethod: WebhookMethod;
+  bodyTemplate?: string;
+  headers?: WebhookHeader[];
 }

frontend/src/features/backups/ui/BackupsComponent.tsx

@@ -446,7 +446,9 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
       render: (createdAt: string) => (
         <div>
           {dayjs.utc(createdAt).local().format(getUserTimeFormat().format)} <br />
-          <span className="text-gray-500">({dayjs.utc(createdAt).local().fromNow()})</span>
+          <span className="text-gray-500 dark:text-gray-400">
+            ({dayjs.utc(createdAt).local().fromNow()})
+          </span>
         </div>
       ),
       sorter: (a, b) => dayjs(a.createdAt).unix() - dayjs(b.createdAt).unix(),
@@ -522,8 +524,8 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
   }
 
   return (
-    <div className="mt-5 w-full rounded-md bg-white p-3 shadow md:p-5">
-      <h2 className="text-lg font-bold md:text-xl">Backups</h2>
+    <div className="mt-5 w-full rounded-md bg-white p-3 shadow md:p-5 dark:bg-gray-800">
+      <h2 className="text-lg font-bold md:text-xl dark:text-white">Backups</h2>
 
       {!isBackupConfigLoading && !backupConfig?.isBackupsEnabled && (
         <div className="text-sm text-red-600 md:text-base">
@@ -558,16 +560,16 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
               {backups.map((backup) => (
                 <div
                   key={backup.id}
-                  className="mb-2 rounded-lg border border-gray-200 bg-white p-4 shadow-sm"
+                  className="mb-2 rounded-lg border border-gray-200 bg-white p-4 shadow-sm dark:border-gray-700 dark:bg-gray-800"
                 >
                   <div className="space-y-3">
                     <div className="flex items-start justify-between">
                       <div>
-                        <div className="text-xs text-gray-500">Created at</div>
+                        <div className="text-xs text-gray-500 dark:text-gray-400">Created at</div>
                         <div className="text-sm font-medium">
                           {dayjs.utc(backup.createdAt).local().format(getUserTimeFormat().format)}
                         </div>
-                        <div className="text-xs text-gray-500">
+                        <div className="text-xs text-gray-500 dark:text-gray-400">
                           ({dayjs.utc(backup.createdAt).local().fromNow()})
                         </div>
                       </div>
@@ -576,11 +578,11 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
 
                     <div className="grid grid-cols-2 gap-4">
                       <div>
-                        <div className="text-xs text-gray-500">Size</div>
+                        <div className="text-xs text-gray-500 dark:text-gray-400">Size</div>
                         <div className="text-sm font-medium">{formatSize(backup.backupSizeMb)}</div>
                       </div>
                       <div>
-                        <div className="text-xs text-gray-500">Duration</div>
+                        <div className="text-xs text-gray-500 dark:text-gray-400">Duration</div>
                         <div className="text-sm font-medium">
                           {formatDuration(backup.backupDurationMs)}
                         </div>
@@ -602,12 +604,12 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
             </div>
           )}
           {!hasMore && backups.length > 0 && (
-            <div className="mt-3 text-center text-sm text-gray-500">
+            <div className="mt-3 text-center text-sm text-gray-500 dark:text-gray-400">
               All backups loaded ({totalBackups} total)
             </div>
           )}
           {!isBackupsLoading && backups.length === 0 && (
-            <div className="py-8 text-center text-gray-500">No backups yet</div>
+            <div className="py-8 text-center text-gray-500 dark:text-gray-400">No backups yet</div>
           )}
         </div>
 
@@ -628,7 +630,7 @@ export const BackupsComponent = ({ database, isCanManageDBs, scrollContainerRef
             </div>
           )}
           {!hasMore && backups.length > 0 && (
-            <div className="mt-2 text-center text-gray-500">
+            <div className="mt-2 text-center text-gray-500 dark:text-gray-400">
               All backups loaded ({totalBackups} total)
             </div>
           )}

frontend/src/features/backups/ui/EditBackupConfigComponent.tsx

@@ -529,7 +529,7 @@ export const EditBackupConfigComponent = ({
           open={isShowCreateStorage}
           onCancel={() => setShowCreateStorage(false)}
         >
-          <div className="my-3 max-w-[275px] text-gray-500">
+          <div className="my-3 max-w-[275px] text-gray-500 dark:text-gray-400">
             Storage - is a place where backups will be stored (local disk, S3, Google Drive, etc.)
           </div>
 

frontend/src/features/databases/ui/DatabaseCardComponent.tsx

@@ -29,7 +29,7 @@ export const DatabaseCardComponent = ({
 
   return (
     <div
-      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedDatabaseId === database.id ? 'bg-blue-100' : 'bg-white'}`}
+      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedDatabaseId === database.id ? 'bg-blue-100 dark:bg-blue-800' : 'bg-white dark:bg-gray-800'}`}
       onClick={() => setSelectedDatabaseId(database.id)}
     >
       <div className="flex">
@@ -49,7 +49,7 @@ export const DatabaseCardComponent = ({
       </div>
 
       {storage && (
-        <div className="text-sm text-gray-500">
+        <div className="text-sm text-gray-500 dark:text-gray-400">
           <span>Storage: </span>
           <span className="inline-flex items-center">
             {storage.name}{' '}
@@ -65,11 +65,13 @@ export const DatabaseCardComponent = ({
       )}
 
       {database.lastBackupTime && (
-        <div className="text-gray-500">Last backup {dayjs(database.lastBackupTime).fromNow()}</div>
+        <div className="text-gray-500 dark:text-gray-400">
+          Last backup {dayjs(database.lastBackupTime).fromNow()}
+        </div>
       )}
 
       {database.lastBackupErrorMessage && (
-        <div className="mt-1 flex items-center text-sm text-red-600 underline">
+        <div className="mt-1 flex items-center text-sm text-red-600 underline dark:text-red-400">
           <InfoCircleOutlined className="mr-1" style={{ color: 'red' }} />
           Has backup error
         </div>

frontend/src/features/databases/ui/DatabaseComponent.tsx

@@ -51,14 +51,14 @@ export const DatabaseComponent = ({
     >
       <div className="flex">
         <div
-          className={`mr-2 cursor-pointer rounded-tl-md rounded-tr-md px-6 py-2 ${currentTab === 'config' ? 'bg-white' : 'bg-gray-200'}`}
+          className={`mr-2 cursor-pointer rounded-tl-md rounded-tr-md px-6 py-2 ${currentTab === 'config' ? 'bg-white dark:bg-gray-800' : 'bg-gray-200 dark:bg-gray-700'}`}
           onClick={() => setCurrentTab('config')}
         >
           Config
         </div>
 
         <div
-          className={`mr-2 cursor-pointer rounded-tl-md rounded-tr-md px-6 py-2 ${currentTab === 'backups' ? 'bg-white' : 'bg-gray-200'}`}
+          className={`mr-2 cursor-pointer rounded-tl-md rounded-tr-md px-6 py-2 ${currentTab === 'backups' ? 'bg-white dark:bg-gray-800' : 'bg-gray-200 dark:bg-gray-700'}`}
           onClick={() => setCurrentTab('backups')}
         >
           Backups

frontend/src/features/databases/ui/DatabaseConfigComponent.tsx

@@ -147,7 +147,7 @@ export const DatabaseConfigComponent = ({
   };
 
   return (
-    <div className="w-full rounded-tr-md rounded-br-md rounded-bl-md bg-white p-3 shadow sm:p-5">
+    <div className="w-full rounded-tr-md rounded-br-md rounded-bl-md bg-white p-3 shadow sm:p-5 dark:bg-gray-800">
       {!isEditName ? (
         <div className="mb-5 flex items-center text-xl font-bold sm:text-2xl">
           {database.name}
@@ -184,7 +184,7 @@ export const DatabaseConfigComponent = ({
                   setEditDatabase(undefined);
                 }}
               >
-                <CloseOutlined className="text-gray-500" />
+                <CloseOutlined className="text-gray-500 dark:text-gray-400" />
               </Button>
             </div>
           </div>
@@ -216,7 +216,7 @@ export const DatabaseConfigComponent = ({
             {database.lastBackupErrorMessage}
           </div>
 
-          <div className="mt-3 text-sm text-gray-500">
+          <div className="mt-3 text-sm text-gray-500 dark:text-gray-400">
             To clean this error (choose any):
             <ul>
               <li>- test connection via button below (even if you updated settings);</li>
@@ -370,7 +370,6 @@ export const DatabaseConfigComponent = ({
           <Button
             type="primary"
             className="w-full sm:mr-1 sm:w-auto"
-            ghost
             onClick={testConnection}
             loading={isTestingConnection}
             disabled={isTestingConnection}
@@ -381,7 +380,6 @@ export const DatabaseConfigComponent = ({
           <Button
             type="primary"
             className="w-full sm:mr-1 sm:w-auto"
-            ghost
             onClick={copyDatabase}
             loading={isCopying}
             disabled={isCopying}

frontend/src/features/databases/ui/DatabasesComponent.tsx

@@ -111,7 +111,7 @@ export const DatabasesComponent = ({ contentHeight, workspace, isCanManageDBs }:
                     placeholder="Search database"
                     value={searchQuery}
                     onChange={(e) => setSearchQuery(e.target.value)}
-                    className="w-full border-b border-gray-300 p-1 text-gray-500 outline-none"
+                    className="w-full border-b border-gray-300 p-1 text-gray-500 outline-none dark:text-gray-400"
                   />
                 </div>
               </>
@@ -127,14 +127,14 @@ export const DatabasesComponent = ({ contentHeight, workspace, isCanManageDBs }:
                   />
                 ))
               : searchQuery && (
-                  <div className="mb-4 text-center text-sm text-gray-500">
+                  <div className="mb-4 text-center text-sm text-gray-500 dark:text-gray-400">
                     No databases found matching &quot;{searchQuery}&quot;
                   </div>
                 )}
 
             {databases.length < 5 && isCanManageDBs && addDatabaseButton}
 
-            <div className="mx-3 text-center text-xs text-gray-500">
+            <div className="mx-3 text-center text-xs text-gray-500 dark:text-gray-400">
               Database - is a thing we are backing up
             </div>
           </div>

frontend/src/features/databases/ui/edit/CreateReadOnlyComponent.tsx

@@ -98,7 +98,12 @@ export const CreateReadOnlyComponent = ({
 
         <p className="mb-2">
           Postgresus enforce enterprise-grade security (
-          <a href="https://postgresus.com/security" target="_blank" rel="noreferrer">
+          <a
+            href="https://postgresus.com/security"
+            target="_blank"
+            rel="noreferrer"
+            className="!text-blue-600 dark:!text-blue-400"
+          >
             read in details here
           </a>
           ). However, it is not possible to be covered from all possible risks.

frontend/src/features/databases/ui/edit/EditDatabaseNotifiersComponent.tsx

@@ -93,7 +93,7 @@ export const EditDatabaseNotifiersComponent = ({
 
   return (
     <div>
-      <div className="mb-5 max-w-[275px] text-gray-500">
+      <div className="mb-5 max-w-[275px] text-gray-500 dark:text-gray-400">
         Notifier - is a place where notifications will be sent (email, Slack, Telegram, etc.)
         <br />
         <br />
@@ -162,7 +162,7 @@ export const EditDatabaseNotifiersComponent = ({
           open={isShowCreateNotifier}
           onCancel={() => setShowCreateNotifier(false)}
         >
-          <div className="my-3 max-w-[275px] text-gray-500">
+          <div className="my-3 max-w-[275px] text-gray-500 dark:text-gray-400">
             Notifier - is a place where notifications will be sent (email, Slack, Telegram, etc.)
           </div>
 

frontend/src/features/databases/ui/edit/EditDatabaseSpecificDataComponent.tsx

@@ -48,10 +48,12 @@ export const EditDatabaseSpecificDataComponent = ({
 
   const [isConnectionTested, setIsConnectionTested] = useState(false);
   const [isTestingConnection, setIsTestingConnection] = useState(false);
+  const [isConnectionFailed, setIsConnectionFailed] = useState(false);
 
   const testConnection = async () => {
     if (!editingDatabase) return;
     setIsTestingConnection(true);
+    setIsConnectionFailed(false);
 
     try {
       await databaseApi.testDatabaseConnectionDirect(editingDatabase);
@@ -61,6 +63,7 @@ export const EditDatabaseSpecificDataComponent = ({
         description: 'You can continue with the next step',
       });
     } catch (e) {
+      setIsConnectionFailed(true);
       alert((e as Error).message);
     }
 
@@ -89,6 +92,7 @@ export const EditDatabaseSpecificDataComponent = ({
     setIsSaving(false);
     setIsConnectionTested(false);
     setIsTestingConnection(false);
+    setIsConnectionFailed(false);
 
     setEditingDatabase({ ...database });
   }, [database]);
@@ -177,12 +181,13 @@ export const EditDatabaseSpecificDataComponent = ({
           {isLocalhostDb && (
             <div className="mb-1 flex">
               <div className="min-w-[150px]" />
-              <div className="max-w-[200px] text-xs text-gray-500">
+              <div className="max-w-[200px] text-xs text-gray-500 dark:text-gray-400">
                 Please{' '}
                 <a
                   href="https://postgresus.com/faq#how-to-backup-localhost"
                   target="_blank"
                   rel="noreferrer"
+                  className="!text-blue-600 dark:!text-blue-400"
                 >
                   read this document
                 </a>{' '}
@@ -326,6 +331,13 @@ export const EditDatabaseSpecificDataComponent = ({
           </Button>
         )}
       </div>
+
+      {isConnectionFailed && (
+        <div className="mt-3 text-sm text-gray-500 dark:text-gray-400">
+          If your database uses IP whitelist, make sure Postgresus server IP is added to the allowed
+          list.
+        </div>
+      )}
     </div>
   );
 };

frontend/src/features/databases/ui/show/ShowDatabaseNotifiersComponent.tsx

@@ -23,7 +23,7 @@ export const ShowDatabaseNotifiersComponent = ({ database }: Props) => {
               </div>
             ))
           ) : (
-            <div className="text-gray-500">No notifiers configured</div>
+            <div className="text-gray-500 dark:text-gray-400">No notifiers configured</div>
           )}
         </div>
       </div>

frontend/src/features/healthcheck/ui/HealthckeckAttemptsComponent.tsx

@@ -118,7 +118,7 @@ export const HealthckeckAttemptsComponent = ({ database }: Props) => {
   }
 
   return (
-    <div className="w-full rounded-tr-md rounded-br-md rounded-bl-md bg-white p-3 shadow sm:p-5">
+    <div className="w-full rounded-tr-md rounded-br-md rounded-bl-md bg-white p-3 shadow sm:p-5 dark:bg-gray-800">
       <h2 className="text-lg font-bold sm:text-xl">Healthcheck attempts</h2>
 
       <div className="mt-3 flex flex-col gap-2 sm:mt-4 sm:flex-row sm:items-center">

frontend/src/features/notifiers/ui/NotifierCardComponent.tsx

@@ -17,13 +17,13 @@ export const NotifierCardComponent = ({
 }: Props) => {
   return (
     <div
-      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedNotifierId === notifier.id ? 'bg-blue-100' : 'bg-white'}`}
+      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedNotifierId === notifier.id ? 'bg-blue-100 dark:bg-blue-800' : 'bg-white dark:bg-gray-800'}`}
       onClick={() => setSelectedNotifierId(notifier.id)}
     >
       <div className="mb-1 font-bold">{notifier.name}</div>
 
       <div className="flex items-center">
-        <div className="text-sm text-gray-500">
+        <div className="text-sm text-gray-500 dark:text-gray-400">
           Notify to {getNotifierNameFromType(notifier.notifierType)}
         </div>
 
@@ -35,7 +35,7 @@ export const NotifierCardComponent = ({
       </div>
 
       {notifier.lastSendError && (
-        <div className="mt-1 flex items-center text-sm text-red-600 underline">
+        <div className="mt-1 flex items-center text-sm text-red-600 underline dark:text-red-400">
           <InfoCircleOutlined className="mr-1" style={{ color: 'red' }} />
           Has send error
         </div>

frontend/src/features/notifiers/ui/NotifierComponent.tsx

@@ -124,7 +124,7 @@ export const NotifierComponent = ({
 
   return (
     <div className="w-full">
-      <div className="grow overflow-y-auto rounded bg-white p-5 shadow">
+      <div className="grow overflow-y-auto rounded bg-white p-5 shadow dark:bg-gray-800">
         {!notifier ? (
           <div className="mt-10 flex justify-center">
             <Spin />
@@ -166,7 +166,7 @@ export const NotifierComponent = ({
                         setEditNotifier(undefined);
                       }}
                     >
-                      <CloseOutlined className="text-gray-500" />
+                      <CloseOutlined className="text-gray-500 dark:text-gray-400" />
                     </Button>
                   </div>
                 </div>
@@ -198,7 +198,7 @@ export const NotifierComponent = ({
                   {notifier.lastSendError}
                 </div>
 
-                <div className="mt-3 text-sm break-words whitespace-pre-wrap text-gray-500">
+                <div className="mt-3 text-sm break-words whitespace-pre-wrap text-gray-500 dark:text-gray-400">
                   To clean this error (choose any):
                   <ul>
                     <li>
@@ -246,7 +246,6 @@ export const NotifierComponent = ({
                 <Button
                   type="primary"
                   className="mr-1"
-                  ghost
                   onClick={sendTestNotification}
                   loading={isSendingTestNotification}
                   disabled={isSendingTestNotification}

frontend/src/features/notifiers/ui/NotifiersComponent.tsx

@@ -111,7 +111,7 @@ export const NotifiersComponent = ({ contentHeight, workspace, isCanManageNotifi
                     placeholder="Search notifier"
                     value={searchQuery}
                     onChange={(e) => setSearchQuery(e.target.value)}
-                    className="w-full border-b border-gray-300 p-1 text-gray-500 outline-none"
+                    className="w-full border-b border-gray-300 p-1 text-gray-500 outline-none dark:text-gray-400"
                   />
                 </div>
               </>
@@ -127,14 +127,14 @@ export const NotifiersComponent = ({ contentHeight, workspace, isCanManageNotifi
                   />
                 ))
               : searchQuery && (
-                  <div className="mb-4 text-center text-sm text-gray-500">
+                  <div className="mb-4 text-center text-sm text-gray-500 dark:text-gray-400">
                     No notifiers found matching &quot;{searchQuery}&quot;
                   </div>
                 )}
 
             {notifiers.length < 5 && isCanManageNotifiers && addNotifierButton}
 
-            <div className="mx-3 text-center text-xs text-gray-500">
+            <div className="mx-3 text-center text-xs text-gray-500 dark:text-gray-400">
               Notifier - is a place where notifications will be sent (email, Slack, Telegram, etc.)
             </div>
           </div>
@@ -179,7 +179,7 @@ export const NotifiersComponent = ({ contentHeight, workspace, isCanManageNotifi
           open={isShowAddNotifier}
           onCancel={() => setIsShowAddNotifier(false)}
         >
-          <div className="my-3 max-w-[250px] text-gray-500">
+          <div className="my-3 max-w-[250px] text-gray-500 dark:text-gray-400">
             Notifier - is a place where notifications will be sent (email, Slack, Telegram, etc.)
           </div>
 

frontend/src/features/notifiers/ui/edit/EditNotifierComponent.tsx

@@ -119,6 +119,7 @@ export function EditNotifierComponent({
       notifier.webhookNotifier = {
         webhookUrl: '',
         webhookMethod: WebhookMethod.POST,
+        headers: [],
       };
     }
 

frontend/src/features/notifiers/ui/edit/notifiers/EditDiscordNotifierComponent.tsx

@@ -33,7 +33,7 @@ export function EditDiscordNotifierComponent({ notifier, setNotifier, setUnsaved
       </div>
 
       <div className="max-w-[250px] sm:ml-[150px]">
-        <div className="mt-1 text-xs text-gray-500">
+        <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
           <strong>How to get Discord webhook URL:</strong>
           <br />
           <br />

frontend/src/features/notifiers/ui/edit/notifiers/EditTelegramNotifierComponent.tsx

@@ -99,7 +99,7 @@ export function EditTelegramNotifierComponent({ notifier, setNotifier, setUnsave
             How to get Telegram chat ID?
           </div>
         ) : (
-          <div className="mt-1 text-xs text-gray-500">
+          <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
             To get your chat ID, message{' '}
             <a href="https://t.me/getmyid_bot" target="_blank" rel="noreferrer">
               @getmyid_bot
@@ -186,7 +186,7 @@ export function EditTelegramNotifierComponent({ notifier, setNotifier, setUnsave
           </div>
 
           <div className="max-w-[250px] sm:ml-[150px]">
-            <div className="mt-1 text-xs text-gray-500">
+            <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
               To get the thread ID, go to the thread in your Telegram group, tap on the thread name
               at the top, then tap &ldquo;Thread Info&rdquo;. Copy the thread link and take the last
               number from the URL.

frontend/src/features/notifiers/ui/edit/notifiers/EditWebhookNotifierComponent.tsx

@@ -1,7 +1,8 @@
-import { InfoCircleOutlined } from '@ant-design/icons';
-import { Input, Select, Tooltip } from 'antd';
+import { DeleteOutlined, InfoCircleOutlined, PlusOutlined } from '@ant-design/icons';
+import { Button, Input, Select, Tooltip } from 'antd';
+import { useMemo } from 'react';
 
-import type { Notifier } from '../../../../../entity/notifiers';
+import type { Notifier, WebhookHeader } from '../../../../../entity/notifiers';
 import { WebhookMethod } from '../../../../../entity/notifiers/models/webhook/WebhookMethod';
 
 interface Props {
@@ -10,7 +11,64 @@ interface Props {
   setUnsaved: () => void;
 }
 
+const DEFAULT_BODY_TEMPLATE = `{
+  "heading": "{{heading}}",
+  "message": "{{message}}"
+}`;
+
+function validateJsonTemplate(template: string): string | null {
+  if (!template.trim()) {
+    return null; // Empty is valid (will use default)
+  }
+
+  // Replace placeholders with valid JSON strings before parsing
+  const testJson = template.replace(/\{\{heading\}\}/g, 'test').replace(/\{\{message\}\}/g, 'test');
+
+  try {
+    JSON.parse(testJson);
+    return null;
+  } catch (e) {
+    if (e instanceof SyntaxError) {
+      return 'Invalid JSON format';
+    }
+    return 'Invalid JSON';
+  }
+}
+
 export function EditWebhookNotifierComponent({ notifier, setNotifier, setUnsaved }: Props) {
+  const headers = notifier?.webhookNotifier?.headers || [];
+  const bodyTemplate = notifier?.webhookNotifier?.bodyTemplate || '';
+
+  const jsonError = useMemo(() => validateJsonTemplate(bodyTemplate), [bodyTemplate]);
+
+  const updateWebhookNotifier = (updates: Partial<typeof notifier.webhookNotifier>) => {
+    setNotifier({
+      ...notifier,
+      webhookNotifier: {
+        ...(notifier.webhookNotifier || { webhookUrl: '', webhookMethod: WebhookMethod.POST }),
+        ...updates,
+      },
+    });
+    setUnsaved();
+  };
+
+  const addHeader = () => {
+    updateWebhookNotifier({
+      headers: [...headers, { key: '', value: '' }],
+    });
+  };
+
+  const updateHeader = (index: number, field: 'key' | 'value', value: string) => {
+    const newHeaders = [...headers];
+    newHeaders[index] = { ...newHeaders[index], [field]: value };
+    updateWebhookNotifier({ headers: newHeaders });
+  };
+
+  const removeHeader = (index: number) => {
+    const newHeaders = headers.filter((_, i) => i !== index);
+    updateWebhookNotifier({ headers: newHeaders });
+  };
+
   return (
     <>
       <div className="mb-1 flex w-full flex-col items-start sm:flex-row sm:items-center">
@@ -18,14 +76,7 @@ export function EditWebhookNotifierComponent({ notifier, setNotifier, setUnsaved
         <Input
           value={notifier?.webhookNotifier?.webhookUrl || ''}
           onChange={(e) => {
-            setNotifier({
-              ...notifier,
-              webhookNotifier: {
-                ...(notifier.webhookNotifier || { webhookMethod: WebhookMethod.POST }),
-                webhookUrl: e.target.value.trim(),
-              },
-            });
-            setUnsaved();
+            updateWebhookNotifier({ webhookUrl: e.target.value.trim() });
           }}
           size="small"
           className="w-full max-w-[250px]"
@@ -39,54 +90,162 @@ export function EditWebhookNotifierComponent({ notifier, setNotifier, setUnsaved
           <Select
             value={notifier?.webhookNotifier?.webhookMethod || WebhookMethod.POST}
             onChange={(value) => {
-              setNotifier({
-                ...notifier,
-                webhookNotifier: {
-                  ...(notifier.webhookNotifier || { webhookUrl: '' }),
-                  webhookMethod: value,
-                },
-              });
-              setUnsaved();
+              updateWebhookNotifier({ webhookMethod: value });
             }}
             size="small"
-            className="w-full max-w-[250px]"
+            className="w-[100px] max-w-[250px]"
             options={[
               { value: WebhookMethod.POST, label: 'POST' },
               { value: WebhookMethod.GET, label: 'GET' },
             ]}
           />
-
-          <Tooltip
-            className="cursor-pointer"
-            title="The HTTP method that will be used to call the webhook"
-          >
-            <InfoCircleOutlined className="ml-2" style={{ color: 'gray' }} />
-          </Tooltip>
         </div>
       </div>
 
+      <div className="mt-3 mb-1 flex w-full flex-col items-start">
+        <div className="mb-1 flex items-center">
+          <span className="min-w-[150px]">
+            Custom headers{' '}
+            <Tooltip title="Add custom HTTP headers to the webhook request (e.g., Authorization, X-API-Key)">
+              <InfoCircleOutlined className="ml-1" style={{ color: 'gray' }} />
+            </Tooltip>
+          </span>
+        </div>
+
+        <div className="w-full max-w-[500px]">
+          {headers.map((header: WebhookHeader, index: number) => (
+            <div key={index} className="mb-1 flex items-center gap-2">
+              <Input
+                value={header.key}
+                onChange={(e) => updateHeader(index, 'key', e.target.value)}
+                size="small"
+                style={{ width: 150, flexShrink: 0 }}
+                placeholder="Header name"
+              />
+              <Input
+                value={header.value}
+                onChange={(e) => updateHeader(index, 'value', e.target.value)}
+                size="small"
+                style={{ flex: 1, minWidth: 0 }}
+                placeholder="Header value"
+              />
+              <Button
+                type="text"
+                danger
+                size="small"
+                icon={<DeleteOutlined />}
+                onClick={() => removeHeader(index)}
+              />
+            </div>
+          ))}
+
+          <Button
+            type="dashed"
+            size="small"
+            icon={<PlusOutlined />}
+            onClick={addHeader}
+            className="mt-1"
+          >
+            Add header
+          </Button>
+        </div>
+      </div>
+
+      {notifier?.webhookNotifier?.webhookMethod === WebhookMethod.POST && (
+        <div className="mt-3 mb-1 flex w-full flex-col items-start">
+          <div className="mb-1 flex items-center">
+            <span className="min-w-[150px]">Body template </span>
+          </div>
+
+          <div className="mb-2 text-xs text-gray-500 dark:text-gray-400">
+            <span className="mr-4">
+              <code className="rounded bg-gray-100 px-1.5 py-0.5 dark:bg-gray-700">
+                {'{{heading}}'}
+              </code>{' '}
+              — notification title
+            </span>
+            <span>
+              <code className="rounded bg-gray-100 px-1.5 py-0.5 dark:bg-gray-700">
+                {'{{message}}'}
+              </code>{' '}
+              — notification message
+            </span>
+          </div>
+
+          <Input.TextArea
+            value={bodyTemplate}
+            onChange={(e) => {
+              updateWebhookNotifier({ bodyTemplate: e.target.value });
+            }}
+            className="w-full max-w-[500px] font-mono text-xs"
+            rows={6}
+            placeholder={DEFAULT_BODY_TEMPLATE}
+            status={jsonError ? 'error' : undefined}
+          />
+          {jsonError && <div className="mt-1 text-xs text-red-500">{jsonError}</div>}
+        </div>
+      )}
+
       {notifier?.webhookNotifier?.webhookUrl && (
-        <div className="mt-3">
-          <div className="mb-1">Example request</div>
+        <div className="mt-4">
+          <div className="mb-1 font-medium">Example request</div>
 
           {notifier?.webhookNotifier?.webhookMethod === WebhookMethod.GET && (
-            <div className="rounded bg-gray-100 p-2 px-3 text-sm break-all">
-              GET {notifier?.webhookNotifier?.webhookUrl}?heading=✅ Backup completed for
-              database&message=Backup completed successfully in 2m 17s.\nCompressed backup size:
-              1.7GB
+            <div className="rounded bg-gray-100 p-2 px-3 text-sm break-all dark:bg-gray-800">
+              <div className="font-semibold text-blue-600 dark:text-blue-400">GET</div>
+              <div className="mt-1">
+                {notifier?.webhookNotifier?.webhookUrl}
+                {
+                  '?heading=✅ Backup completed for database "my-database" (workspace "Production")&message=Backup completed successfully in 1m 23s.%0ACompressed backup size: 256.00 MB'
+                }
+              </div>
+              {headers.length > 0 && (
+                <div className="mt-2 border-t border-gray-200 pt-2 dark:border-gray-600">
+                  <div className="text-xs font-semibold text-gray-500 dark:text-gray-400">
+                    Headers:
+                  </div>
+                  {headers
+                    .filter((h) => h.key)
+                    .map((h, i) => (
+                      <div key={i} className="text-xs">
+                        {h.key}: {h.value || '(empty)'}
+                      </div>
+                    ))}
+                </div>
+              )}
             </div>
           )}
 
           {notifier?.webhookNotifier?.webhookMethod === WebhookMethod.POST && (
-            <div className="rounded bg-gray-100 p-2 px-3 font-mono text-sm break-all whitespace-pre-line">
-              {`POST ${notifier?.webhookNotifier?.webhookUrl}
-Content-Type: application/json
-
-{
-  "heading": "✅ Backup completed for database",
-  "message": "Backup completed successfully in 2m 17s.\\nCompressed backup size: 1.7GB"
-}
-`}
+            <div className="rounded bg-gray-100 p-2 px-3 font-mono text-sm break-words whitespace-pre-wrap dark:bg-gray-800">
+              <div className="font-semibold text-blue-600 dark:text-blue-400">
+                POST {notifier?.webhookNotifier?.webhookUrl}
+              </div>
+              <div className="mt-1 text-gray-600 dark:text-gray-400">
+                {headers.find((h) => h.key.toLowerCase() === 'content-type')
+                  ? ''
+                  : 'Content-Type: application/json'}
+                {headers
+                  .filter((h) => h.key)
+                  .map((h) => `\n${h.key}: ${h.value}`)
+                  .join('')}
+              </div>
+              <div className="mt-2 break-words whitespace-pre-wrap">
+                {notifier?.webhookNotifier?.bodyTemplate
+                  ? notifier.webhookNotifier.bodyTemplate
+                      .replace(
+                        '{{heading}}',
+                        '✅ Backup completed for database "my-database" (workspace "Production")',
+                      )
+                      .replace(
+                        '{{message}}',
+                        'Backup completed successfully in 1m 23s.\\nCompressed backup size: 256.00 MB',
+                      )
+                  : `{
+  "heading": "✅ Backup completed for database "my-database" (workspace "My workspace")",
+  "message": "Backup completed successfully in 1m 23s. Compressed backup size: 256.00 MB"
+}`}
+              </div>
             </div>
           )}
         </div>

frontend/src/features/notifiers/ui/show/notifier/ShowWebhookNotifierComponent.tsx

@@ -1,22 +1,50 @@
-import type { Notifier } from '../../../../../entity/notifiers';
+import type { Notifier, WebhookHeader } from '../../../../../entity/notifiers';
+import { WebhookMethod } from '../../../../../entity/notifiers';
 
 interface Props {
   notifier: Notifier;
 }
 
 export function ShowWebhookNotifierComponent({ notifier }: Props) {
+  const headers = notifier?.webhookNotifier?.headers || [];
+  const hasHeaders = headers.filter((h: WebhookHeader) => h.key).length > 0;
+
   return (
     <>
       <div className="flex items-center">
         <div className="min-w-[110px]">Webhook URL</div>
-
-        <div className="w-[250px]">{notifier?.webhookNotifier?.webhookUrl || '-'}</div>
+        <div className="max-w-[350px] truncate">{notifier?.webhookNotifier?.webhookUrl || '-'}</div>
       </div>
 
       <div className="mt-1 mb-1 flex items-center">
         <div className="min-w-[110px]">Method</div>
         <div>{notifier?.webhookNotifier?.webhookMethod || '-'}</div>
       </div>
+
+      {hasHeaders && (
+        <div className="mt-1 mb-1 flex items-start">
+          <div className="min-w-[110px]">Headers</div>
+          <div className="flex flex-col text-sm">
+            {headers
+              .filter((h: WebhookHeader) => h.key)
+              .map((h: WebhookHeader, i: number) => (
+                <div key={i} className="text-gray-600">
+                  <span className="font-medium">{h.key}:</span> {h.value || '(empty)'}
+                </div>
+              ))}
+          </div>
+        </div>
+      )}
+
+      {notifier?.webhookNotifier?.webhookMethod === WebhookMethod.POST &&
+        notifier?.webhookNotifier?.bodyTemplate && (
+          <div className="mt-1 mb-1 flex items-start">
+            <div className="min-w-[110px]">Body Template</div>
+            <div className="max-w-[350px] rounded bg-gray-50 p-2 font-mono text-xs whitespace-pre-wrap">
+              {notifier.webhookNotifier.bodyTemplate}
+            </div>
+          </div>
+        )}
     </>
   );
 }

frontend/src/features/restores/ui/RestoresComponent.tsx

@@ -211,7 +211,7 @@ export const RestoresComponent = ({ database, backup }: Props) => {
                       <div className="w-[75px] min-w-[75px]">Duration</div>
                       <div>
                         <div>{duration}</div>
-                        <div className="mt-2 text-xs text-gray-500">
+                        <div className="mt-2 text-xs text-gray-500 dark:text-gray-400">
                           Expected restoration time usually 3x-5x longer than the backup duration
                           (sometimes less, sometimes more depending on data type)
                           <br />

frontend/src/features/settings/ui/AuditLogsComponent.tsx

@@ -105,7 +105,7 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
       render: (_, record: AuditLog) => {
         if (!record.userEmail && !record.userName) {
           return (
-            <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600">
+            <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600 dark:bg-gray-700 dark:text-gray-300">
               System
             </span>
           );
@@ -116,7 +116,7 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
           : record.userEmail;
 
         return (
-          <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800">
+          <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
             {displayText}
           </span>
         );
@@ -126,7 +126,9 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
       title: 'Message',
       dataIndex: 'message',
       key: 'message',
-      render: (message: string) => <span className="text-xs text-gray-900">{message}</span>,
+      render: (message: string) => (
+        <span className="text-xs text-gray-900 dark:text-gray-100">{message}</span>
+      ),
     },
     {
       title: 'Workspace',
@@ -136,7 +138,9 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
       render: (workspaceId: string | undefined) => (
         <span
           className={`inline-block rounded-full px-1.5 py-0.5 text-xs font-medium ${
-            workspaceId ? 'bg-blue-100 text-blue-800' : 'bg-gray-100 text-gray-600'
+            workspaceId
+              ? 'bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-200'
+              : 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
           }`}
         >
           {workspaceId || '-'}
@@ -152,7 +156,7 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
         const date = dayjs(createdAt);
         const timeFormat = getUserTimeFormat();
         return (
-          <span className="text-xs text-gray-700">
+          <span className="text-xs text-gray-700 dark:text-gray-300">
             {`${date.format(timeFormat.format)} (${date.fromNow()})`}
           </span>
         );
@@ -167,7 +171,7 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
     const getUserDisplay = () => {
       if (!log.userEmail && !log.userName) {
         return (
-          <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600">
+          <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600 dark:bg-gray-700 dark:text-gray-300">
             System
           </span>
         );
@@ -176,25 +180,28 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
       const displayText = log.userName ? `${log.userName} (${log.userEmail})` : log.userEmail;
 
       return (
-        <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800">
+        <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
           {displayText}
         </span>
       );
     };
 
     return (
-      <div key={log.id} className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm">
+      <div
+        key={log.id}
+        className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm dark:border-gray-700 dark:bg-gray-800"
+      >
         <div className="flex items-start justify-between">
           <div className="flex-1">{getUserDisplay()}</div>
-          <div className="text-right text-xs text-gray-500">
+          <div className="text-right text-xs text-gray-500 dark:text-gray-400">
             <div>{date.format(timeFormat.format)}</div>
-            <div className="text-gray-400">{date.fromNow()}</div>
+            <div className="text-gray-400 dark:text-gray-500">{date.fromNow()}</div>
           </div>
         </div>
-        <div className="mt-2 text-sm text-gray-900">{log.message}</div>
+        <div className="mt-2 text-sm text-gray-900 dark:text-gray-100">{log.message}</div>
         {log.workspaceName && (
           <div className="mt-2">
-            <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800">
+            <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
               {log.workspaceName}
             </span>
           </div>
@@ -206,8 +213,8 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
   return (
     <div className="max-w-[1200px]">
       <div className="mb-4 flex items-center justify-between">
-        <h2 className="text-xl font-bold">Audit Logs</h2>
-        <div className="text-sm text-gray-500">
+        <h2 className="text-xl font-bold dark:text-white">Audit Logs</h2>
+        <div className="text-sm text-gray-500 dark:text-gray-400">
           {isLoading ? (
             <Spin indicator={<LoadingOutlined spin />} />
           ) : (
@@ -221,7 +228,7 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
           <Spin indicator={<LoadingOutlined spin />} size="large" />
         </div>
       ) : auditLogs.length === 0 ? (
-        <div className="flex h-32 items-center justify-center text-gray-500">
+        <div className="flex h-32 items-center justify-center text-gray-500 dark:text-gray-400">
           No audit logs found.
         </div>
       ) : (
@@ -242,12 +249,14 @@ export function AuditLogsComponent({ scrollContainerRef: externalScrollRef }: Pr
           {isLoadingMore && (
             <div className="flex justify-center py-4">
               <Spin indicator={<LoadingOutlined spin />} />
-              <span className="ml-2 text-sm text-gray-500">Loading more logs...</span>
+              <span className="ml-2 text-sm text-gray-500 dark:text-gray-400">
+                Loading more logs...
+              </span>
             </div>
           )}
 
           {!hasMore && auditLogs.length > 0 && (
-            <div className="py-4 text-center text-sm text-gray-500">
+            <div className="py-4 text-center text-sm text-gray-500 dark:text-gray-400">
               All logs loaded ({auditLogs.length} total)
             </div>
           )}

frontend/src/features/settings/ui/SettingsComponent.tsx

@@ -95,10 +95,10 @@ export function SettingsComponent({ contentHeight }: Props) {
       <div className="w-full">
         <div
           ref={scrollContainerRef}
-          className="grow overflow-y-auto rounded bg-white p-5 shadow"
+          className="grow overflow-y-auto rounded bg-white p-5 shadow dark:bg-gray-800"
           style={{ height: contentHeight }}
         >
-          <h1 className="text-2xl font-bold">Postgresus settings</h1>
+          <h1 className="text-2xl font-bold dark:text-white">Postgresus settings</h1>
 
           <div className="mt-6">
             {isLoading ? (
@@ -109,10 +109,12 @@ export function SettingsComponent({ contentHeight }: Props) {
               <div className="max-w-lg text-sm">
                 <div className="space-y-6">
                   {/* External Registrations Setting */}
-                  <div className="flex items-start justify-between border-b border-gray-200 pb-4">
+                  <div className="flex items-start justify-between border-b border-gray-200 pb-4 dark:border-gray-700">
                     <div className="flex-1 pr-20">
-                      <div className="font-medium text-gray-900">Allow external registrations</div>
-                      <div className="mt-1 text-gray-500">
+                      <div className="font-medium text-gray-900 dark:text-white">
+                        Allow external registrations
+                      </div>
+                      <div className="mt-1 text-gray-500 dark:text-gray-400">
                         When enabled, new users can register accounts in Postgresus. If disabled,
                         new users can only register via invitation
                       </div>
@@ -135,11 +137,13 @@ export function SettingsComponent({ contentHeight }: Props) {
 
                   {/* Member Invitations Setting */}
                   {!formSettings.isAllowExternalRegistrations && (
-                    <div className="flex items-start justify-between border-b border-gray-200 pb-4">
+                    <div className="flex items-start justify-between border-b border-gray-200 pb-4 dark:border-gray-700">
                       <div className="flex-1 pr-20">
-                        <div className="font-medium text-gray-900">Allow member invitations</div>
+                        <div className="font-medium text-gray-900 dark:text-white">
+                          Allow member invitations
+                        </div>
 
-                        <div className="mt-1 text-gray-500">
+                        <div className="mt-1 text-gray-500 dark:text-gray-400">
                           When enabled, existing members can invite new users to join Postgresus. If
                           not - only admins can invite users.
                         </div>
@@ -162,11 +166,13 @@ export function SettingsComponent({ contentHeight }: Props) {
                   )}
 
                   {/* Member Workspace Creation Setting */}
-                  <div className="flex items-start justify-between border-b border-gray-200 pb-4">
+                  <div className="flex items-start justify-between border-b border-gray-200 pb-4 dark:border-gray-700">
                     <div className="flex-1 pr-20">
-                      <div className="font-medium text-gray-900">Members can create workspaces</div>
+                      <div className="font-medium text-gray-900 dark:text-white">
+                        Members can create workspaces
+                      </div>
 
-                      <div className="mt-1 text-gray-500">
+                      <div className="mt-1 text-gray-500 dark:text-gray-400">
                         When enabled, members (non-admin users) can create new workspaces. If not -
                         only admins can create workspaces.
                       </div>
@@ -209,7 +215,7 @@ export function SettingsComponent({ contentHeight }: Props) {
             )}
           </div>
 
-          <div className="mt-3 text-sm text-gray-500">
+          <div className="mt-3 text-sm text-gray-500 dark:text-gray-400">
             Read more about settings you can{' '}
             <a
               href="https://postgresus.com/access-management/#global-settings"
@@ -223,10 +229,10 @@ export function SettingsComponent({ contentHeight }: Props) {
 
           {/* Health-check Information */}
           <div className="my-8 max-w-2xl">
-            <h2 className="mb-3 text-xl font-bold">Health-check</h2>
+            <h2 className="mb-3 text-xl font-bold dark:text-white">Health-check</h2>
 
             <div className="group relative">
-              <div className="flex items-center rounded-md border border-gray-300 bg-gray-50 px-3 py-2 !font-mono text-sm text-gray-700">
+              <div className="flex items-center rounded-md border border-gray-300 bg-gray-50 px-3 py-2 !font-mono text-sm text-gray-700 dark:border-gray-600 dark:bg-gray-700 dark:text-gray-200">
                 <code
                   className="flex-1 cursor-pointer break-all transition-colors select-all hover:text-blue-600"
                   onClick={() => {
@@ -248,7 +254,7 @@ export function SettingsComponent({ contentHeight }: Props) {
                   📋
                 </Button>
               </div>
-              <div className="mt-1 text-xs text-gray-500">
+              <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                 Use this endpoint to monitor your Postgresus system&apos;s availability
               </div>
             </div>

frontend/src/features/storages/ui/StorageCardComponent.tsx

@@ -17,13 +17,15 @@ export const StorageCardComponent = ({
 }: Props) => {
   return (
     <div
-      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedStorageId === storage.id ? 'bg-blue-100' : 'bg-white'}`}
+      className={`mb-3 cursor-pointer rounded p-3 shadow ${selectedStorageId === storage.id ? 'bg-blue-100 dark:bg-blue-800' : 'bg-white dark:bg-gray-800'}`}
       onClick={() => setSelectedStorageId(storage.id)}
     >
       <div className="mb-1 font-bold">{storage.name}</div>
 
       <div className="flex items-center">
-        <div className="text-sm text-gray-500">Type: {getStorageNameFromType(storage.type)}</div>
+        <div className="text-sm text-gray-500 dark:text-gray-400">
+          Type: {getStorageNameFromType(storage.type)}
+        </div>
 
         <img
           src={getStorageLogoFromType(storage.type)}
@@ -33,7 +35,7 @@ export const StorageCardComponent = ({
       </div>
 
       {storage.lastSaveError && (
-        <div className="mt-1 flex items-center text-sm text-red-600 underline">
+        <div className="mt-1 flex items-center text-sm text-red-600 underline dark:text-red-400">
           <InfoCircleOutlined className="mr-1" style={{ color: 'red' }} />
           Has save error
         </div>

frontend/src/features/storages/ui/StorageComponent.tsx

@@ -122,7 +122,7 @@ export const StorageComponent = ({
 
   return (
     <div className="w-full">
-      <div className="grow overflow-y-auto rounded bg-white p-5 shadow">
+      <div className="grow overflow-y-auto rounded bg-white p-5 shadow dark:bg-gray-800">
         {!storage ? (
           <div className="mt-10 flex justify-center">
             <Spin />
@@ -164,7 +164,7 @@ export const StorageComponent = ({
                         setEditStorage(undefined);
                       }}
                     >
-                      <CloseOutlined className="text-gray-500" />
+                      <CloseOutlined className="text-gray-500 dark:text-gray-400" />
                     </Button>
                   </div>
                 </div>
@@ -196,7 +196,7 @@ export const StorageComponent = ({
                   {storage.lastSaveError}
                 </div>
 
-                <div className="mt-3 text-sm break-words whitespace-pre-wrap text-gray-500">
+                <div className="mt-3 text-sm break-words whitespace-pre-wrap text-gray-500 dark:text-gray-400">
                   To clean this error (choose any):
                   <ul>
                     <li>- test connection via button below (even if you updated settings);</li>
@@ -242,7 +242,6 @@ export const StorageComponent = ({
                 <Button
                   type="primary"
                   className="mr-1"
-                  ghost
                   onClick={testConnection}
                   loading={isTestingConnection}
                   disabled={isTestingConnection}

frontend/src/features/storages/ui/StoragesComponent.tsx

@@ -100,7 +100,7 @@ export const StoragesComponent = ({ contentHeight, workspace, isCanManageStorage
 
             {storages.length < 5 && isCanManageStorages && addStorageButton}
 
-            <div className="mx-3 text-center text-xs text-gray-500">
+            <div className="mx-3 text-center text-xs text-gray-500 dark:text-gray-400">
               Storage - is a place where backups will be stored (local disk, S3, etc.)
             </div>
           </div>
@@ -145,7 +145,7 @@ export const StoragesComponent = ({ contentHeight, workspace, isCanManageStorage
           open={isShowAddStorage}
           onCancel={() => setIsShowAddStorage(false)}
         >
-          <div className="my-3 max-w-[250px] text-gray-500">
+          <div className="my-3 max-w-[250px] text-gray-500 dark:text-gray-400">
             Storage - is a place where backups will be stored (local disk, S3, etc.)
           </div>
 

frontend/src/features/storages/ui/edit/storages/EditS3StorageComponent.tsx

@@ -183,13 +183,16 @@ export function EditS3StorageComponent({ storage, setStorage, setUnsaved }: Prop
                 size="small"
                 className="w-full max-w-[250px]"
                 placeholder="my-prefix/ (optional)"
+                // we do not allow to change the prefix after creation,
+                // otherwise we will have to migrate all the data to the new prefix
+                disabled={!!storage.id}
               />
 
               <Tooltip
                 className="cursor-pointer"
-                title="Optional prefix for all object keys (e.g., 'backups/' or 'my_team/'). May not work with some S3-compatible storages."
+                title="Optional prefix for all object keys (e.g., 'backups/' or 'my_team/'). May not work with some S3-compatible storages. Cannot be changed after creation (otherwise backups will be lost)."
               >
-                <InfoCircleOutlined className="ml-2" style={{ color: 'gray' }} />
+                <InfoCircleOutlined className="ml-4" style={{ color: 'gray' }} />
               </Tooltip>
             </div>
           </div>

frontend/src/features/users/ui/AdminPasswordComponent.tsx

@@ -81,7 +81,7 @@ export function AdminPasswordComponent({
     <div className="w-full max-w-[300px]">
       <div className="mb-5 text-center text-2xl font-bold">Sign up admin</div>
 
-      <div className="mx-auto mb-4 max-w-[250px] text-center text-sm text-gray-600">
+      <div className="mx-auto mb-4 max-w-[250px] text-center text-sm text-gray-600 dark:text-gray-400">
         Then you will be able to sign in with login &quot;admin&quot; and password you set
       </div>
 

frontend/src/features/users/ui/AuthNavbarComponent.tsx

@@ -1,15 +1,22 @@
 import GitHubButton from 'react-github-btn';
 
+import { ThemeToggleComponent } from '../../../widgets/main/ThemeToggleComponent';
+
 export function AuthNavbarComponent() {
   return (
-    <div className="m-3 flex h-[65px] items-center justify-center p-3 sm:justify-start">
+    <div className="flex h-[65px] items-center justify-center px-5 pt-5 sm:justify-start">
       <div className="flex items-center gap-3 hover:opacity-80">
         <a href="https://postgresus.com" target="_blank" rel="noreferrer">
           <img className="h-[45px] w-[45px]" src="/logo.svg" />
         </a>
 
         <div className="text-xl font-bold">
-          <a href="https://postgresus.com" className="!text-black" target="_blank" rel="noreferrer">
+          <a
+            href="https://postgresus.com"
+            className="!text-blue-600"
+            target="_blank"
+            rel="noreferrer"
+          >
             Postgresus
           </a>
         </div>
@@ -17,7 +24,7 @@ export function AuthNavbarComponent() {
 
       <div className="mr-3 ml-auto hidden items-center gap-5 sm:flex">
         <a
-          className="!text-black hover:opacity-80"
+          className="!text-black hover:opacity-80 dark:!text-gray-200"
           href="https://t.me/postgresus_community"
           target="_blank"
           rel="noreferrer"
@@ -25,7 +32,7 @@ export function AuthNavbarComponent() {
           Community
         </a>
 
-        <div className="mt-1">
+        <div className="mt-[7px]">
           <GitHubButton
             href="https://github.com/RostislavDugin/postgresus"
             data-icon="octicon-star"
@@ -36,6 +43,8 @@ export function AuthNavbarComponent() {
             &nbsp;Star on GitHub
           </GitHubButton>
         </div>
+
+        <ThemeToggleComponent />
       </div>
     </div>
   );

frontend/src/features/users/ui/ProfileComponent.tsx

@@ -200,21 +200,23 @@ export function ProfileComponent({ contentHeight }: Props) {
     <div className="flex grow sm:pl-5">
       <div className="w-full">
         <div
-          className="grow overflow-y-auto rounded bg-white p-5 shadow"
+          className="grow overflow-y-auto rounded bg-white p-5 shadow dark:bg-gray-800"
           style={{ height: contentHeight }}
         >
-          <h1 className="text-2xl font-bold">Profile</h1>
+          <h1 className="text-2xl font-bold dark:text-white">Profile</h1>
 
           <div className="mt-5">
             {user ? (
               <>
                 <div className="mb-6">
-                  <h3 className="mb-4 text-lg font-semibold">Profile Information</h3>
+                  <h3 className="mb-4 text-lg font-semibold dark:text-white">
+                    Profile Information
+                  </h3>
                   <div className="max-w-md">
-                    <div className="text-xs font-semibold">User ID</div>
-                    <div className="mb-4 text-sm text-gray-600">{user.id}</div>
+                    <div className="text-xs font-semibold dark:text-gray-200">User ID</div>
+                    <div className="mb-4 text-sm text-gray-600 dark:text-gray-400">{user.id}</div>
 
-                    <div className="mb-1 text-xs font-semibold">Name</div>
+                    <div className="mb-1 text-xs font-semibold dark:text-gray-200">Name</div>
                     <Input
                       value={editName}
                       onChange={(e) => {
@@ -226,7 +228,7 @@ export function ProfileComponent({ contentHeight }: Props) {
                       className="mb-4"
                     />
 
-                    <div className="mt-2 mb-1 text-xs font-semibold">Email</div>
+                    <div className="mt-2 mb-1 text-xs font-semibold dark:text-gray-200">Email</div>
                     <Input
                       value={editEmail}
                       onChange={(e) => {
@@ -240,14 +242,14 @@ export function ProfileComponent({ contentHeight }: Props) {
                       disabled={user.email === 'admin'}
                     />
                     {user.email === 'admin' && (
-                      <div className="mb-4 text-xs text-gray-500">
+                      <div className="mb-4 text-xs text-gray-500 dark:text-gray-400">
                         Admin email cannot be changed
                       </div>
                     )}
 
-                    <div className="mt-2 mb-1 text-xs font-semibold">Role</div>
+                    <div className="mt-2 mb-1 text-xs font-semibold dark:text-gray-200">Role</div>
                     <div className="mb-4">
-                      <span className="inline-flex items-center rounded-full bg-blue-100 px-2.5 py-0.5 text-xs font-medium text-blue-800">
+                      <span className="inline-flex items-center rounded-full bg-blue-100 px-2.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
                         {getRoleDisplayText(user.role)}
                       </span>
                     </div>
@@ -267,16 +269,18 @@ export function ProfileComponent({ contentHeight }: Props) {
                 </div>
 
                 <div className="mb-8">
-                  <Button type="default" onClick={handleLogout} danger>
+                  <Button type="primary" ghost onClick={handleLogout} danger>
                     Logout
                   </Button>
                 </div>
 
                 <div className="max-w-xs">
-                  <h3 className="mb-4 text-lg font-semibold">Change Password</h3>
+                  <h3 className="mb-4 text-lg font-semibold dark:text-white">Change Password</h3>
 
                   <div className="max-w-sm">
-                    <div className="my-1 text-xs font-semibold">New Password</div>
+                    <div className="my-1 text-xs font-semibold dark:text-gray-200">
+                      New Password
+                    </div>
                     <Input.Password
                       placeholder="Enter new password"
                       value={newPassword}
@@ -294,7 +298,9 @@ export function ProfileComponent({ contentHeight }: Props) {
                       }}
                     />
 
-                    <div className="mt-2 mb-1 text-xs font-semibold">Confirm New Password</div>
+                    <div className="mt-2 mb-1 text-xs font-semibold dark:text-gray-200">
+                      Confirm New Password
+                    </div>
                     <Input.Password
                       placeholder="Confirm new password"
                       value={confirmPassword}

frontend/src/features/users/ui/SignInComponent.tsx

@@ -75,7 +75,7 @@ export function SignInComponent({ onSwitchToSignUp }: SignInComponentProps): JSX
             <div className="w-full border-t border-gray-300"></div>
           </div>
           <div className="relative flex justify-center text-sm">
-            <span className="bg-white px-2 text-gray-500">or continue</span>
+            <span className="bg-white px-2 text-gray-500 dark:text-gray-400">or continue</span>
           </div>
         </div>
       )}
@@ -126,12 +126,12 @@ export function SignInComponent({ onSwitchToSignUp }: SignInComponentProps): JSX
       )}
 
       {onSwitchToSignUp && (
-        <div className="mt-4 text-center text-sm text-gray-600">
+        <div className="mt-4 text-center text-sm text-gray-600 dark:text-gray-400">
           Don&apos;t have an account?{' '}
           <button
             type="button"
             onClick={onSwitchToSignUp}
-            className="cursor-pointer font-medium text-blue-600 hover:text-blue-700"
+            className="cursor-pointer font-medium text-blue-600 hover:text-blue-700 dark:!text-blue-500"
           >
             Sign up
           </button>

frontend/src/features/users/ui/SignUpComponent.tsx

@@ -106,7 +106,7 @@ export function SignUpComponent({ onSwitchToSignIn }: SignUpComponentProps): JSX
             <div className="w-full border-t border-gray-300"></div>
           </div>
           <div className="relative flex justify-center text-sm">
-            <span className="bg-white px-2 text-gray-500">or continue</span>
+            <span className="bg-white px-2 text-gray-500 dark:text-gray-400">or continue</span>
           </div>
         </div>
       )}
@@ -184,12 +184,12 @@ export function SignUpComponent({ onSwitchToSignIn }: SignUpComponentProps): JSX
       )}
 
       {onSwitchToSignIn && (
-        <div className="mt-4 text-center text-sm text-gray-600">
+        <div className="mt-4 text-center text-sm text-gray-600 dark:text-gray-400">
           Already have an account?{' '}
           <button
             type="button"
             onClick={onSwitchToSignIn}
-            className="cursor-pointer font-medium text-blue-600 hover:text-blue-700"
+            className="cursor-pointer font-medium text-blue-600 hover:text-blue-700 dark:!text-blue-500"
           >
             Sign in
           </button>

frontend/src/features/users/ui/UserAuditLogsSidebarComponent.tsx

@@ -139,7 +139,7 @@ export function UserAuditLogsSidebarComponent({ user }: Props) {
     <div className="h-full">
       <div ref={scrollContainerRef} className="h-full overflow-y-auto">
         <div className="mb-4 flex items-center justify-between">
-          <div className="text-sm text-gray-500">
+          <div className="text-sm text-gray-500 dark:text-gray-400">
             {isLoading ? (
               <Spin indicator={<LoadingOutlined spin />} />
             ) : (
@@ -166,18 +166,20 @@ export function UserAuditLogsSidebarComponent({ user }: Props) {
             {isLoadingMore && (
               <div className="flex justify-center py-4">
                 <Spin indicator={<LoadingOutlined spin />} />
-                <span className="ml-2 text-sm text-gray-500">Loading more logs...</span>
+                <span className="ml-2 text-sm text-gray-500 dark:text-gray-400">
+                  Loading more logs...
+                </span>
               </div>
             )}
 
             {!hasMore && auditLogs.length > 0 && (
-              <div className="py-4 text-center text-sm text-gray-500">
+              <div className="py-4 text-center text-sm text-gray-500 dark:text-gray-400">
                 All logs loaded ({total} total)
               </div>
             )}
 
             {!isLoading && auditLogs.length === 0 && (
-              <div className="py-8 text-center text-sm text-gray-500">
+              <div className="py-8 text-center text-sm text-gray-500 dark:text-gray-400">
                 No audit logs found for this user.
               </div>
             )}

frontend/src/features/users/ui/UsersComponent.tsx

@@ -272,9 +272,9 @@ export function UsersComponent({ contentHeight }: Props) {
         const date = dayjs(createdAt);
         const timeFormat = getUserTimeFormat();
         return (
-          <div className="text-sm text-gray-600">
+          <div className="text-sm text-gray-600 dark:text-gray-400">
             <div>{date.format(timeFormat.format)}</div>
-            <div className="text-xs text-gray-400">{date.fromNow()}</div>
+            <div className="text-xs text-gray-400 dark:text-gray-500">{date.fromNow()}</div>
           </div>
         );
       },
@@ -297,13 +297,16 @@ export function UsersComponent({ contentHeight }: Props) {
     const timeFormat = getUserTimeFormat();
 
     return (
-      <div key={user.id} className="mb-3 rounded-lg border border-gray-200 bg-white p-4 shadow-sm">
+      <div
+        key={user.id}
+        className="mb-3 rounded-lg border border-gray-200 bg-white p-4 shadow-sm dark:border-gray-700 dark:bg-gray-800"
+      >
         <div className="mb-3 flex items-start justify-between">
           <div className="flex-1">
-            <div className="font-medium text-gray-900">{user.name}</div>
-            <div className="text-sm text-gray-500">{user.email}</div>
+            <div className="font-medium text-gray-900 dark:text-white">{user.name}</div>
+            <div className="text-sm text-gray-500 dark:text-gray-400">{user.email}</div>
           </div>
-          <div className="text-right text-xs text-gray-500">
+          <div className="text-right text-xs text-gray-500 dark:text-gray-400">
             <div>{date.format(timeFormat.format)}</div>
             <div className="text-gray-400">{date.fromNow()}</div>
           </div>
@@ -311,7 +314,7 @@ export function UsersComponent({ contentHeight }: Props) {
 
         <div className="mb-3 flex items-center justify-between">
           <div className="flex items-center gap-2">
-            <span className="text-sm text-gray-600">Role:</span>
+            <span className="text-sm text-gray-600 dark:text-gray-400">Role:</span>
             <Select
               value={user.role}
               onChange={(value) => handleRoleChange(user.id, value)}
@@ -335,7 +338,7 @@ export function UsersComponent({ contentHeight }: Props) {
             />
           </div>
           <div className="flex items-center gap-2">
-            <span className="text-sm text-gray-600">Active:</span>
+            <span className="text-sm text-gray-600 dark:text-gray-400">Active:</span>
             <Switch
               checked={user.isActive}
               onChange={() => handleActivationToggle(user.id, user.isActive)}
@@ -367,12 +370,12 @@ export function UsersComponent({ contentHeight }: Props) {
       <div className="w-full">
         <div
           ref={scrollContainerRef}
-          className="grow overflow-y-auto rounded bg-white p-5 shadow"
+          className="grow overflow-y-auto rounded bg-white p-5 shadow dark:bg-gray-800"
           style={{ height: contentHeight }}
         >
           <div className="mb-4 flex items-center justify-between">
-            <h1 className="text-2xl font-bold">Postgresus Users</h1>
-            <div className="text-sm text-gray-500">
+            <h1 className="text-2xl font-bold dark:text-white">Postgresus users</h1>
+            <div className="text-sm text-gray-500 dark:text-gray-400">
               {isLoading ? 'Loading...' : `${users.length} of ${total} users`}
             </div>
           </div>
@@ -392,7 +395,7 @@ export function UsersComponent({ contentHeight }: Props) {
               <Spin indicator={<LoadingOutlined spin />} size="large" />
             </div>
           ) : users.length === 0 ? (
-            <div className="flex h-32 items-center justify-center text-gray-500">
+            <div className="flex h-32 items-center justify-center text-gray-500 dark:text-gray-400">
               No users found.
             </div>
           ) : (
@@ -417,7 +420,7 @@ export function UsersComponent({ contentHeight }: Props) {
               )}
 
               {!hasMore && users.length > 0 && (
-                <div className="py-4 text-center text-sm text-gray-500">
+                <div className="py-4 text-center text-sm text-gray-500 dark:text-gray-400">
                   All users loaded ({total} total)
                 </div>
               )}
@@ -430,8 +433,10 @@ export function UsersComponent({ contentHeight }: Props) {
       <Drawer
         title={
           <div>
-            <div className="text-lg font-semibold text-gray-900">User Audit Logs</div>
-            <div className="text-sm text-gray-600">{selectedUser?.email}</div>
+            <div className="text-lg font-semibold text-gray-900 dark:text-white">
+              User Audit Logs
+            </div>
+            <div className="text-sm text-gray-600 dark:text-gray-400">{selectedUser?.email}</div>
           </div>
         }
         placement="right"

frontend/src/features/workspaces/ui/CreateWorkspaceDialogComponent.tsx

@@ -100,7 +100,7 @@ export const CreateWorkspaceDialogComponent = ({
       ]}
     >
       <div className="mb-4">
-        <div>
+        <div className="dark:text-gray-300">
           Workspace is a place where you group:
           <br />
           - your databases;
@@ -111,7 +111,9 @@ export const CreateWorkspaceDialogComponent = ({
           <br />- access control (if you have team);
         </div>
 
-        <label className="mt-5 mb-2 block text-sm font-medium text-gray-700">Workspace name</label>
+        <label className="mt-5 mb-2 block text-sm font-medium text-gray-700 dark:text-gray-300">
+          Workspace name
+        </label>
         <Input
           value={workspaceName}
           onChange={(e) => setWorkspaceName(e.target.value)}

frontend/src/features/workspaces/ui/WorkspaceAuditLogsComponent.tsx

@@ -111,7 +111,7 @@ export function WorkspaceAuditLogsComponent({
       render: (_, record: AuditLog) => {
         if (!record.userEmail && !record.userName) {
           return (
-            <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600">
+            <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600 dark:bg-gray-700 dark:text-gray-300">
               System
             </span>
           );
@@ -122,7 +122,7 @@ export function WorkspaceAuditLogsComponent({
           : record.userEmail;
 
         return (
-          <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800">
+          <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
             {displayText}
           </span>
         );
@@ -132,7 +132,9 @@ export function WorkspaceAuditLogsComponent({
       title: 'Message',
       dataIndex: 'message',
       key: 'message',
-      render: (message: string) => <span className="text-xs text-gray-900">{message}</span>,
+      render: (message: string) => (
+        <span className="text-xs text-gray-900 dark:text-gray-100">{message}</span>
+      ),
     },
     {
       title: 'Created',
@@ -143,7 +145,7 @@ export function WorkspaceAuditLogsComponent({
         const date = dayjs(createdAt);
         const timeFormat = getUserShortTimeFormat();
         return (
-          <span className="text-xs text-gray-700">
+          <span className="text-xs text-gray-700 dark:text-gray-300">
             {`${date.format(timeFormat.format)} (${date.fromNow()})`}
           </span>
         );
@@ -158,7 +160,7 @@ export function WorkspaceAuditLogsComponent({
     const getUserDisplay = () => {
       if (!log.userEmail && !log.userName) {
         return (
-          <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600">
+          <span className="inline-block rounded-full bg-gray-100 px-1.5 py-0.5 text-xs font-medium text-gray-600 dark:bg-gray-700 dark:text-gray-300">
             System
           </span>
         );
@@ -167,22 +169,25 @@ export function WorkspaceAuditLogsComponent({
       const displayText = log.userName ? `${log.userName} (${log.userEmail})` : log.userEmail;
 
       return (
-        <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800">
+        <span className="inline-block rounded-full bg-blue-100 px-1.5 py-0.5 text-xs font-medium text-blue-800 dark:bg-blue-900 dark:text-blue-200">
           {displayText}
         </span>
       );
     };
 
     return (
-      <div key={log.id} className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm">
+      <div
+        key={log.id}
+        className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm dark:border-gray-700 dark:bg-gray-800"
+      >
         <div className="flex items-start justify-between">
           <div className="flex-1">{getUserDisplay()}</div>
-          <div className="text-right text-xs text-gray-500">
+          <div className="text-right text-xs text-gray-500 dark:text-gray-400">
             <div>{date.format(timeFormat.format)}</div>
-            <div className="text-gray-400">{date.fromNow()}</div>
+            <div className="text-gray-400 dark:text-gray-500">{date.fromNow()}</div>
           </div>
         </div>
-        <div className="mt-2 text-sm text-gray-900">{log.message}</div>
+        <div className="mt-2 text-sm text-gray-900 dark:text-gray-100">{log.message}</div>
       </div>
     );
   };
@@ -194,8 +199,8 @@ export function WorkspaceAuditLogsComponent({
   return (
     <div className="max-w-[1200px]">
       <div className="mb-4 flex items-center justify-between">
-        <h2 className="text-xl font-bold text-gray-900">Audit logs</h2>
-        <div className="text-sm text-gray-500">
+        <h2 className="text-xl font-bold text-gray-900 dark:text-white">Audit logs</h2>
+        <div className="text-sm text-gray-500 dark:text-gray-400">
           {isLoading ? (
             <Spin indicator={<LoadingOutlined spin />} />
           ) : (
@@ -209,7 +214,7 @@ export function WorkspaceAuditLogsComponent({
           <Spin indicator={<LoadingOutlined spin />} size="large" />
         </div>
       ) : auditLogs.length === 0 ? (
-        <div className="flex h-32 items-center justify-center text-gray-500">
+        <div className="flex h-32 items-center justify-center text-gray-500 dark:text-gray-400">
           No audit logs found for this workspace.
         </div>
       ) : (
@@ -230,12 +235,14 @@ export function WorkspaceAuditLogsComponent({
           {isLoadingMore && (
             <div className="flex justify-center py-4">
               <Spin indicator={<LoadingOutlined spin />} />
-              <span className="ml-2 text-sm text-gray-500">Loading more logs...</span>
+              <span className="ml-2 text-sm text-gray-500 dark:text-gray-400">
+                Loading more logs...
+              </span>
             </div>
           )}
 
           {!hasMore && auditLogs.length > 0 && (
-            <div className="py-4 text-center text-sm text-gray-500">
+            <div className="py-4 text-center text-sm text-gray-500 dark:text-gray-400">
               All logs loaded ({auditLogs.length} total)
             </div>
           )}

frontend/src/features/workspaces/ui/WorkspaceMembershipComponent.tsx

@@ -315,10 +315,10 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
       width: 300,
       render: (_, record: WorkspaceMemberResponse) => (
         <div className="flex items-center">
-          <UserOutlined className="mr-2 text-gray-400" />
+          <UserOutlined className="mr-2 text-gray-400 dark:text-gray-500" />
           <div>
-            <div className="font-medium">{record.name}</div>
-            <div className="text-xs text-gray-500">{record.email}</div>
+            <div className="font-medium dark:text-white">{record.name}</div>
+            <div className="text-xs text-gray-500 dark:text-gray-400">{record.email}</div>
           </div>
         </div>
       ),
@@ -360,9 +360,9 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
         const date = dayjs(createdAt);
         const timeFormat = getUserShortTimeFormat();
         return (
-          <div className="text-sm text-gray-600">
+          <div className="text-sm text-gray-600 dark:text-gray-300">
             <div>{date.format(timeFormat.format)}</div>
-            <div className="text-xs text-gray-400">{date.fromNow()}</div>
+            <div className="text-xs text-gray-400 dark:text-gray-500">{date.fromNow()}</div>
           </div>
         );
       },
@@ -411,14 +411,14 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
     return (
       <div
         key={member.id}
-        className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm"
+        className="mb-3 rounded-lg border border-gray-200 bg-white p-3 shadow-sm dark:border-gray-700 dark:bg-gray-800"
       >
         <div className="flex items-start justify-between">
           <div className="flex items-center">
-            <UserOutlined className="mr-2 text-gray-400" />
+            <UserOutlined className="mr-2 text-gray-400 dark:text-gray-500" />
             <div>
-              <div className="font-medium">{member.name}</div>
-              <div className="text-xs text-gray-500">{member.email}</div>
+              <div className="font-medium dark:text-white">{member.name}</div>
+              <div className="text-xs text-gray-500 dark:text-gray-400">{member.email}</div>
             </div>
           </div>
           {canManageMembers && member.role !== WorkspaceRole.OWNER && !isCurrentUser && (
@@ -444,7 +444,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
 
         <div className="mt-3 flex items-center justify-between">
           <div>
-            <div className="text-xs text-gray-500">Role</div>
+            <div className="text-xs text-gray-500 dark:text-gray-400">Role</div>
             {canManageMembers && member.role !== WorkspaceRole.OWNER && !isCurrentUser ? (
               <Select
                 value={member.role}
@@ -464,9 +464,11 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
             )}
           </div>
           <div className="text-right">
-            <div className="text-xs text-gray-500">Joined</div>
-            <div className="text-sm text-gray-600">{date.format(timeFormat.format)}</div>
-            <div className="text-xs text-gray-400">{date.fromNow()}</div>
+            <div className="text-xs text-gray-500 dark:text-gray-400">Joined</div>
+            <div className="text-sm text-gray-600 dark:text-gray-300">
+              {date.format(timeFormat.format)}
+            </div>
+            <div className="text-xs text-gray-400 dark:text-gray-500">{date.fromNow()}</div>
           </div>
         </div>
       </div>
@@ -476,7 +478,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
   return (
     <div className="max-w-[850px]">
       <div className="mb-6 flex flex-col gap-3 md:flex-row md:items-center md:justify-between">
-        <h2 className="text-xl font-bold text-gray-900">Users</h2>
+        <h2 className="text-xl font-bold text-gray-900 dark:text-white">Users</h2>
 
         <div className="flex flex-col gap-2 md:flex-row md:space-x-2">
           {canTransferOwnership && (
@@ -509,7 +511,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
         </div>
       ) : (
         <div>
-          <div className="mb-4 text-sm text-gray-500">
+          <div className="mb-4 text-sm text-gray-500 dark:text-gray-400">
             {members.length === 0
               ? 'No members found'
               : `${members.length} member${members.length !== 1 ? 's' : ''}`}
@@ -517,7 +519,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
 
           {isMobile ? (
             members.length === 0 ? (
-              <div className="py-8 text-center text-gray-500">
+              <div className="py-8 text-center text-gray-500 dark:text-gray-400">
                 <div className="mb-2">No members found</div>
                 {canManageMembers && (
                   <div className="text-sm">Click &quot;Add member&quot; to get started</div>
@@ -535,7 +537,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
               size="small"
               locale={{
                 emptyText: (
-                  <div className="py-8 text-center text-gray-500">
+                  <div className="py-8 text-center text-gray-500 dark:text-gray-400">
                     <div className="mb-2">No members found</div>
                     {canManageMembers && (
                       <div className="text-sm">Click &quot;Add member&quot; to get started</div>
@@ -569,7 +571,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
       >
         <div className="py-4">
           <div className="mb-4">
-            <div className="mb-2 font-medium text-gray-900">Email address</div>
+            <div className="mb-2 font-medium text-gray-900 dark:text-white">Email address</div>
             {user.role === UserRole.ADMIN ? (
               <AutoComplete
                 value={addMemberForm.email}
@@ -619,14 +621,14 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
                 status={addMemberEmailError ? 'error' : undefined}
               />
             )}
-            <div className="mt-1 text-xs text-gray-500">
+            <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
               If the user exists, they will be added directly. Otherwise, an invitation will be
               sent.
             </div>
           </div>
 
           <div className="mb-4">
-            <div className="mb-2 font-medium text-gray-900">Role</div>
+            <div className="mb-2 font-medium text-gray-900 dark:text-white">Role</div>
             <Select
               value={addMemberForm.role}
               onChange={(role) => setAddMemberForm({ ...addMemberForm, role })}
@@ -655,10 +657,12 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
       >
         <div className="py-4">
           <div className="flex items-center">
-            <UserAddOutlined className="mr-3 text-2xl text-blue-600" />
+            <UserAddOutlined className="mr-3 text-2xl text-blue-600 dark:text-blue-400" />
             <div>
-              <div className="font-medium text-gray-900">Invitation sent to {invitedEmail}</div>
-              <div className="mt-1 text-sm text-gray-600">
+              <div className="font-medium text-gray-900 dark:text-white">
+                Invitation sent to {invitedEmail}
+              </div>
+              <div className="mt-1 text-sm text-gray-600 dark:text-gray-300">
                 The user is not present in the system yet, but has been invited to the workspace.
                 After the user signs up via specified email, they will automatically become a member
                 of the workspace.
@@ -687,23 +691,23 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
         }}
       >
         <div className="py-4">
-          <div className="mb-4 rounded-md bg-yellow-50 p-3">
-            <div className="text-sm text-yellow-800">
+          <div className="mb-4 rounded-md bg-yellow-50 p-3 dark:bg-yellow-900/30">
+            <div className="text-sm text-yellow-800 dark:text-yellow-200">
               <strong>Warning:</strong> This action cannot be undone. You will lose ownership of
               this workspace and the new owner will have full control.
             </div>
           </div>
 
           {eligibleMembers.length === 0 ? (
-            <div className="rounded-md bg-gray-50 p-4 text-center">
-              <div className="text-sm text-gray-600">
+            <div className="rounded-md bg-gray-50 p-4 text-center dark:bg-gray-700">
+              <div className="text-sm text-gray-600 dark:text-gray-300">
                 No members available to transfer ownership to. You need to have at least one other
                 member in the workspace to transfer ownership.
               </div>
             </div>
           ) : (
             <div className="mb-4">
-              <div className="mb-2 font-medium text-gray-900">Select new owner</div>
+              <div className="mb-2 font-medium text-gray-900 dark:text-white">Select new owner</div>
               <Select
                 value={transferForm.selectedMemberId || undefined}
                 onChange={(memberId) => {
@@ -716,7 +720,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
                 options={eligibleMembers.map((member) => ({
                   label: (
                     <div className="flex items-center">
-                      <UserOutlined className="mr-2 text-gray-400" />
+                      <UserOutlined className="mr-2 text-gray-400 dark:text-gray-500" />
                       <div>
                         {member.name} ({member.email})
                       </div>
@@ -725,7 +729,7 @@ export function WorkspaceMembershipComponent({ workspaceResponse, user }: Props)
                   value: member.userId,
                 }))}
               />
-              <div className="mt-1 text-xs text-gray-500">
+              <div className="mt-1 text-xs text-gray-500 dark:text-gray-400">
                 The selected member will become the workspace owner
               </div>
             </div>

frontend/src/features/workspaces/ui/WorkspaceSettingsComponent.tsx

@@ -169,27 +169,29 @@ export function WorkspaceSettingsComponent({ workspaceResponse, user, contentHei
       <div className="w-full">
         <div
           ref={scrollContainerRef}
-          className={`grow overflow-y-auto rounded bg-white shadow ${isMobile ? 'p-3' : 'p-5'}`}
+          className={`grow overflow-y-auto rounded bg-white shadow dark:bg-gray-800 ${isMobile ? 'p-3' : 'p-5'}`}
           style={{ height: contentHeight }}
         >
-          <h1 className="mb-6 text-2xl font-bold">Workspace settings</h1>
+          <h1 className="mb-6 text-2xl font-bold dark:text-white">Workspace settings</h1>
 
           {isLoading || !workspace ? (
             <Spin indicator={<LoadingOutlined spin />} size="large" />
           ) : (
             <>
               {!canEdit && (
-                <div className="my-4 max-w-[500px] rounded-md bg-yellow-50 p-3">
-                  <div className="text-sm text-yellow-800">
+                <div className="my-4 max-w-[500px] rounded-md bg-yellow-50 p-3 dark:bg-yellow-900/30">
+                  <div className="text-sm text-yellow-800 dark:text-yellow-200">
                     You don&apos;t have permission to modify these settings
                   </div>
                 </div>
               )}
 
               <div className="space-y-6 text-sm">
-                <div className="max-w-2xl border-b border-gray-200 pb-6">
+                <div className="max-w-2xl border-b border-gray-200 pb-6 dark:border-gray-700">
                   <div className="max-w-md">
-                    <div className="mb-1 font-medium text-gray-900">Workspace name</div>
+                    <div className="mb-1 font-medium text-gray-900 dark:text-white">
+                      Workspace name
+                    </div>
                     <Input
                       value={formWorkspace.name || ''}
                       onChange={(e) => {
@@ -233,21 +235,25 @@ export function WorkspaceSettingsComponent({ workspaceResponse, user, contentHei
                   )}
                 </div>
 
-                <div className="max-w-2xl border-b border-gray-200 pb-6">
+                <div className="max-w-2xl border-b border-gray-200 pb-6 dark:border-gray-700">
                   <WorkspaceMembershipComponent workspaceResponse={workspaceResponse} user={user} />
                 </div>
 
                 {canEdit && (
-                  <div className="max-w-2xl border-b border-gray-200 pb-6">
-                    <h2 className="mb-4 text-xl font-bold text-gray-900">Danger Zone</h2>
+                  <div className="max-w-2xl border-b border-gray-200 pb-6 dark:border-gray-700">
+                    <h2 className="mb-4 text-xl font-bold text-gray-900 dark:text-white">
+                      Danger Zone
+                    </h2>
 
-                    <div className="rounded-lg border border-red-200 bg-red-50 p-4">
+                    <div className="rounded-lg border border-red-200 bg-red-50 p-4 dark:border-red-800 dark:bg-red-900/30">
                       <div
                         className={`flex ${isMobile ? 'flex-col gap-3' : 'items-start justify-between'}`}
                       >
                         <div className="flex-1">
-                          <div className="font-medium text-red-900">Delete this workspace</div>
-                          <div className="mt-1 text-sm text-red-700">
+                          <div className="font-medium text-red-900 dark:text-red-200">
+                            Delete this workspace
+                          </div>
+                          <div className="mt-1 text-sm text-red-700 dark:text-red-300">
                             Once you delete a workspace, there is no going back. All data and
                             resources associated with this workspace will be permanently removed.
                           </div>

frontend/src/index.css

@@ -1,5 +1,8 @@
 @import 'tailwindcss';
 
+/* Enable Tailwind dark mode with class strategy */
+@custom-variant dark (&:where(.dark, .dark *));
+
 :root {
   font-family:
     'Jost',
@@ -59,18 +62,18 @@ body {
 
 /* Track */
 *::-webkit-scrollbar-track {
-  background: gainsboro;
+  background: var(--color-scrollbar-track);
 }
 
 /* Handle */
 *::-webkit-scrollbar-thumb {
-  background: #adadad;
+  background: var(--color-scrollbar-thumb);
   border-radius: 360px;
 }
 
 /* Handle on hover */
 *::-webkit-scrollbar-thumb:hover {
-  background: #555;
+  background: var(--color-scrollbar-thumb-hover);
   cursor: pointer;
 }
 /* END OF SCROLLBAR STYLING */

frontend/src/pages/AuthPageComponent.tsx

@@ -9,11 +9,13 @@ import {
   SignInComponent,
   SignUpComponent,
 } from '../features/users';
+import { useScreenHeight } from '../shared/hooks';
 
 export function AuthPageComponent() {
   const [isAdminHasPassword, setIsAdminHasPassword] = useState(false);
   const [authMode, setAuthMode] = useState<'signIn' | 'signUp'>('signUp');
   const [isLoading, setLoading] = useState(true);
+  const screenHeight = useScreenHeight();
 
   const checkAdminPasswordStatus = () => {
     setLoading(true);
@@ -34,7 +36,7 @@ export function AuthPageComponent() {
   }, []);
 
   return (
-    <div>
+    <div className="h-full dark:bg-gray-900" style={{ height: screenHeight }}>
       {isLoading ? (
         <div className="flex h-screen w-screen items-center justify-center">
           <Spin indicator={<LoadingOutlined spin />} size="large" />

frontend/src/pages/OauthStorageComponent.tsx

@@ -85,7 +85,7 @@ export function OauthStorageComponent() {
           window.location.href = '/';
         }}
       >
-        <div className="my-3 max-w-[250px] text-gray-500">
+        <div className="my-3 max-w-[250px] text-gray-500 dark:text-gray-400">
           Storage - is a place where backups will be stored (local disk, S3, etc.)
         </div>
 

frontend/src/shared/theme/ThemeProvider.tsx

@@ -0,0 +1,78 @@
+import { useCallback, useEffect, useMemo, useState } from 'react';
+import type { ReactNode } from 'react';
+
+import { ThemeContext } from './themeContext';
+import type { ResolvedTheme, ThemeMode } from './themeContext';
+
+const THEME_STORAGE_KEY = 'postgresus-theme';
+
+function getSystemTheme(): ResolvedTheme {
+  if (typeof window !== 'undefined' && window.matchMedia) {
+    return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+  }
+  return 'light';
+}
+
+function getStoredTheme(): ThemeMode {
+  if (typeof window !== 'undefined') {
+    const stored = localStorage.getItem(THEME_STORAGE_KEY);
+
+    if (stored === 'light' || stored === 'dark' || stored === 'system') {
+      return stored;
+    }
+  }
+
+  return 'system';
+}
+
+interface ThemeProviderProps {
+  children: ReactNode;
+}
+
+export function ThemeProvider({ children }: ThemeProviderProps) {
+  const [theme, setThemeState] = useState<ThemeMode>(getStoredTheme);
+  const [systemTheme, setSystemTheme] = useState<ResolvedTheme>(getSystemTheme);
+
+  // Listen for system theme changes
+  useEffect(() => {
+    const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+
+    const handleChange = (e: MediaQueryListEvent) => {
+      setSystemTheme(e.matches ? 'dark' : 'light');
+    };
+
+    mediaQuery.addEventListener('change', handleChange);
+    return () => mediaQuery.removeEventListener('change', handleChange);
+  }, []);
+
+  // Compute resolved theme
+  const resolvedTheme: ResolvedTheme = useMemo(() => {
+    return theme === 'system' ? systemTheme : theme;
+  }, [theme, systemTheme]);
+
+  // Apply theme class to document
+  useEffect(() => {
+    const root = document.documentElement;
+    if (resolvedTheme === 'dark') {
+      root.classList.add('dark');
+    } else {
+      root.classList.remove('dark');
+    }
+  }, [resolvedTheme]);
+
+  const setTheme = useCallback((newTheme: ThemeMode) => {
+    setThemeState(newTheme);
+    localStorage.setItem(THEME_STORAGE_KEY, newTheme);
+  }, []);
+
+  const value = useMemo(
+    () => ({
+      theme,
+      resolvedTheme,
+      setTheme,
+    }),
+    [theme, resolvedTheme, setTheme],
+  );
+
+  return <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>;
+}

frontend/src/shared/theme/index.ts

@@ -0,0 +1,4 @@
+export { ThemeContext } from './themeContext';
+export type { ThemeMode, ResolvedTheme, ThemeContextValue } from './themeContext';
+export { ThemeProvider } from './ThemeProvider';
+export { useTheme } from './useTheme';

frontend/src/shared/theme/themeContext.ts

@@ -0,0 +1,12 @@
+import { createContext } from 'react';
+
+export type ThemeMode = 'light' | 'dark' | 'system';
+export type ResolvedTheme = 'light' | 'dark';
+
+export interface ThemeContextValue {
+  theme: ThemeMode;
+  resolvedTheme: ResolvedTheme;
+  setTheme: (theme: ThemeMode) => void;
+}
+
+export const ThemeContext = createContext<ThemeContextValue | undefined>(undefined);

frontend/src/shared/theme/useTheme.ts

@@ -0,0 +1,11 @@
+import { useContext } from 'react';
+
+import { ThemeContext } from './themeContext';
+
+export function useTheme() {
+  const context = useContext(ThemeContext);
+  if (context === undefined) {
+    throw new Error('useTheme must be used within a ThemeProvider');
+  }
+  return context;
+}

frontend/src/widgets/main/MainScreenComponent.tsx

@@ -25,6 +25,7 @@ import {
 } from '../../features/workspaces';
 import { useIsMobile, useScreenHeight } from '../../shared/hooks';
 import { SidebarComponent } from './SidebarComponent';
+import { ThemeToggleComponent } from './ThemeToggleComponent';
 import { WorkspaceSelectionComponent } from './WorkspaceSelectionComponent';
 
 export const MainScreenComponent = () => {
@@ -194,8 +195,8 @@ export const MainScreenComponent = () => {
   ];
 
   return (
-    <div style={{ height: screenHeight }} className="bg-[#f5f5f5] p-2 md:p-3">
-      <div className="mb-2 flex h-[50px] items-center rounded bg-white px-2 py-2 shadow md:mb-3 md:h-[60px] md:p-3">
+    <div style={{ height: screenHeight }} className="bg-[#f5f5f5] p-2 md:p-3 dark:bg-gray-900">
+      <div className="mb-2 flex h-[50px] items-center rounded bg-white px-2 py-2 shadow md:mb-3 md:h-[60px] md:p-3 dark:bg-gray-800">
         <div className="flex items-center gap-2 hover:opacity-80 md:gap-3">
           <a href="https://postgresus.com" target="_blank" rel="noreferrer">
             <img className="h-[30px] w-[30px] md:h-[40px] md:w-[40px]" src="/logo.svg" />
@@ -215,7 +216,7 @@ export const MainScreenComponent = () => {
 
         <div className="ml-auto hidden items-center gap-5 md:flex">
           <a
-            className="!text-black hover:opacity-80"
+            className="!text-black hover:opacity-80 dark:!text-gray-200"
             href="https://postgresus.com/installation"
             target="_blank"
             rel="noreferrer"
@@ -224,7 +225,7 @@ export const MainScreenComponent = () => {
           </a>
 
           <a
-            className="!text-black hover:opacity-80"
+            className="!text-black hover:opacity-80 dark:!text-gray-200"
             href="https://postgresus.com/contribute"
             target="_blank"
             rel="noreferrer"
@@ -232,7 +233,7 @@ export const MainScreenComponent = () => {
             Contribute
           </a>
           <a
-            className="!text-black hover:opacity-80"
+            className="!text-black hover:opacity-80 dark:!text-gray-200"
             href="https://t.me/postgresus_community"
             target="_blank"
             rel="noreferrer"
@@ -255,7 +256,7 @@ export const MainScreenComponent = () => {
           {diskUsage && (
             <Tooltip title="To make backups locally and restore them, you need to have enough space on your disk. For restore, you need to have same amount of space that the backup size.">
               <div
-                className={`cursor-pointer text-center text-xs ${isUsedMoreThan95Percent ? 'text-red-500' : 'text-gray-500'}`}
+                className={`cursor-pointer text-center text-xs ${isUsedMoreThan95Percent ? 'text-red-500' : 'text-gray-500 dark:text-gray-400'}`}
               >
                 {(diskUsage.usedSpaceBytes / 1024 ** 3).toFixed(1)} of{' '}
                 {(diskUsage.totalSpaceBytes / 1024 ** 3).toFixed(1)} GB
@@ -265,13 +266,16 @@ export const MainScreenComponent = () => {
               </div>
             </Tooltip>
           )}
+
+          <ThemeToggleComponent />
         </div>
 
-        <div className="mt-1 ml-auto md:hidden">
+        <div className="ml-auto flex items-center gap-2 md:hidden">
           <Button
             type="text"
             icon={<MenuOutlined style={{ fontSize: '20px' }} />}
             onClick={() => setIsSidebarOpen(!isSidebarOpen)}
+            className="mt-1"
           />
         </div>
       </div>

frontend/src/widgets/main/SidebarComponent.tsx

@@ -6,6 +6,8 @@ import GitHubButton from 'react-github-btn';
 import { type DiskUsage } from '../../entity/disk';
 import { type UserProfile, UserRole } from '../../entity/users';
 import { useIsMobile } from '../../shared/hooks';
+import { useTheme } from '../../shared/theme';
+import { ThemeToggleComponent } from './ThemeToggleComponent';
 
 interface TabItem {
   text: string;
@@ -38,6 +40,7 @@ export const SidebarComponent = ({
   contentHeight,
 }: Props) => {
   const isMobile = useIsMobile();
+  const { resolvedTheme } = useTheme();
 
   // Close sidebar on desktop when it becomes desktop size
   useEffect(() => {
@@ -73,7 +76,7 @@ export const SidebarComponent = ({
   if (!isMobile) {
     return (
       <div
-        className="max-w-[60px] min-w-[60px] rounded bg-white py-2 shadow"
+        className="max-w-[60px] min-w-[60px] rounded bg-white py-2 shadow dark:bg-gray-800"
         style={{ height: contentHeight }}
       >
         <div className="flex h-full flex-col">
@@ -81,7 +84,7 @@ export const SidebarComponent = ({
             {filteredTabs.map((tab) => (
               <div key={tab.text} className="flex justify-center">
                 <div
-                  className={`flex h-[50px] w-[50px] cursor-pointer items-center justify-center rounded select-none ${selectedTab === tab.name ? 'bg-blue-600' : 'hover:bg-blue-50'}`}
+                  className={`flex h-[50px] w-[50px] cursor-pointer items-center justify-center rounded select-none ${selectedTab === tab.name ? 'bg-blue-600' : 'hover:bg-blue-50 dark:hover:bg-gray-700'}`}
                   onClick={() => handleTabClick(tab)}
                   style={{ marginTop: tab.marginTop }}
                 >
@@ -111,17 +114,24 @@ export const SidebarComponent = ({
       placement="right"
       width={280}
       styles={{
-        body: { padding: 0 },
+        body: {
+          padding: 0,
+          backgroundColor: resolvedTheme === 'dark' ? '#1f2937' : undefined,
+        },
+        header: {
+          backgroundColor: resolvedTheme === 'dark' ? '#1f2937' : undefined,
+        },
       }}
       closable={false}
       mask={false}
     >
       <div className="flex h-full flex-col">
         {/* Custom Close Button */}
-        <div className="flex justify-end border-b border-gray-200 px-3 py-3">
+        <div className="flex items-center justify-between border-b border-gray-200 px-3 py-3 dark:border-gray-700">
+          <ThemeToggleComponent />
           <button
             onClick={onClose}
-            className="flex h-8 w-8 items-center justify-center rounded hover:bg-gray-100"
+            className="flex h-8 w-8 items-center justify-center rounded hover:bg-gray-100 dark:hover:bg-gray-700"
           >
             <CloseOutlined />
           </button>
@@ -136,7 +146,7 @@ export const SidebarComponent = ({
             return (
               <div key={tab.text}>
                 <div
-                  className={`flex cursor-pointer items-center gap-3 rounded px-3 py-3 select-none ${selectedTab === tab.name ? 'bg-blue-600 text-white' : 'text-gray-700 hover:bg-gray-100'}`}
+                  className={`flex cursor-pointer items-center gap-3 rounded px-3 py-3 select-none ${selectedTab === tab.name ? 'bg-blue-600 text-white' : 'text-gray-700 hover:bg-gray-100 dark:text-gray-200 dark:hover:bg-gray-700'}`}
                   onClick={() => handleTabClick(tab)}
                 >
                   <img
@@ -147,19 +157,21 @@ export const SidebarComponent = ({
                   />
                   <span className="text-sm font-medium">{tab.text}</span>
                 </div>
-                {showDivider && <div className="my-2 border-t border-gray-200" />}
+                {showDivider && (
+                  <div className="my-2 border-t border-gray-200 dark:border-gray-700" />
+                )}
               </div>
             );
           })}
         </div>
 
         {/* Footer Section */}
-        <div className="border-t border-gray-200 bg-gray-50 px-3 py-4">
+        <div className="border-t border-gray-200 bg-gray-50 px-3 py-4 dark:border-gray-700 dark:bg-gray-800">
           {diskUsage && (
             <div className="mb-4">
               <Tooltip title="To make backups locally and restore them, you need to have enough space on your disk. For restore, you need to have same amount of space that the backup size.">
                 <div
-                  className={`cursor-pointer text-xs ${isUsedMoreThan95Percent ? 'text-red-500' : 'text-gray-600'}`}
+                  className={`cursor-pointer text-xs ${isUsedMoreThan95Percent ? 'text-red-500' : 'text-gray-600 dark:text-gray-400'}`}
                 >
                   <div className="font-medium">Disk Usage</div>
                   <div className="mt-1">
@@ -174,7 +186,7 @@ export const SidebarComponent = ({
 
           <div className="space-y-2">
             <a
-              className="!hover:text-blue-600 block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100"
+              className="block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100 hover:!text-blue-600 dark:!text-gray-300 dark:hover:bg-gray-700"
               href="https://postgresus.com/installation"
               target="_blank"
               rel="noreferrer"
@@ -183,7 +195,7 @@ export const SidebarComponent = ({
             </a>
 
             <a
-              className="!hover:text-blue-600 block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100"
+              className="block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100 hover:!text-blue-600 dark:!text-gray-300 dark:hover:bg-gray-700"
               href="https://postgresus.com/contribute"
               target="_blank"
               rel="noreferrer"
@@ -192,7 +204,7 @@ export const SidebarComponent = ({
             </a>
 
             <a
-              className="!hover:text-blue-600 block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100"
+              className="block rounded text-sm font-medium !text-gray-700 hover:bg-gray-100 hover:!text-blue-600 dark:!text-gray-300 dark:hover:bg-gray-700"
               href="https://t.me/postgresus_community"
               target="_blank"
               rel="noreferrer"

frontend/src/widgets/main/ThemeToggleComponent.tsx

@@ -0,0 +1,129 @@
+import { Dropdown } from 'antd';
+import type { MenuProps } from 'antd';
+
+import { type ThemeMode, useTheme } from '../../shared/theme';
+
+const SunIcon = () => (
+  <svg
+    xmlns="http://www.w3.org/2000/svg"
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <circle cx="12" cy="12" r="4" />
+    <path d="M12 2v2" />
+    <path d="M12 20v2" />
+    <path d="m4.93 4.93 1.41 1.41" />
+    <path d="m17.66 17.66 1.41 1.41" />
+    <path d="M2 12h2" />
+    <path d="M20 12h2" />
+    <path d="m6.34 17.66-1.41 1.41" />
+    <path d="m19.07 4.93-1.41 1.41" />
+  </svg>
+);
+
+const MoonIcon = () => (
+  <svg
+    xmlns="http://www.w3.org/2000/svg"
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <path d="M12 3a6 6 0 0 0 9 9 9 9 0 1 1-9-9Z" />
+  </svg>
+);
+
+const SystemIcon = () => (
+  <svg
+    xmlns="http://www.w3.org/2000/svg"
+    width="18"
+    height="18"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    strokeWidth="2"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  >
+    <rect width="20" height="14" x="2" y="3" rx="2" />
+    <line x1="8" x2="16" y1="21" y2="21" />
+    <line x1="12" x2="12" y1="17" y2="21" />
+  </svg>
+);
+
+export function ThemeToggleComponent() {
+  const { theme, setTheme, resolvedTheme } = useTheme();
+
+  const items: MenuProps['items'] = [
+    {
+      key: 'light',
+      label: (
+        <div className="flex items-center gap-2">
+          <SunIcon />
+          <span>Light</span>
+        </div>
+      ),
+      onClick: () => setTheme('light'),
+    },
+    {
+      key: 'dark',
+      label: (
+        <div className="flex items-center gap-2">
+          <MoonIcon />
+          <span>Dark</span>
+        </div>
+      ),
+      onClick: () => setTheme('dark'),
+    },
+    {
+      key: 'system',
+      label: (
+        <div className="flex items-center gap-2">
+          <SystemIcon />
+          <span>System</span>
+        </div>
+      ),
+      onClick: () => setTheme('system'),
+    },
+  ];
+
+  const getCurrentIcon = () => {
+    if (theme === 'system') {
+      return <SystemIcon />;
+    }
+    return resolvedTheme === 'dark' ? <MoonIcon /> : <SunIcon />;
+  };
+
+  const getLabel = (mode: ThemeMode) => {
+    switch (mode) {
+      case 'light':
+        return 'Light';
+      case 'dark':
+        return 'Dark';
+      case 'system':
+        return 'System';
+    }
+  };
+
+  return (
+    <Dropdown menu={{ items, selectedKeys: [theme] }} trigger={['click']} placement="bottomRight">
+      <button
+        className="flex cursor-pointer items-center gap-1.5 rounded-md border border-gray-200 bg-white px-2.5 py-1 text-sm text-gray-700 transition-colors hover:bg-gray-50 dark:border-gray-600 dark:bg-gray-700 dark:text-gray-200 dark:hover:bg-gray-600"
+        title={`Theme: ${getLabel(theme)}`}
+      >
+        {getCurrentIcon()}
+        <span className="hidden sm:inline">{getLabel(theme)}</span>
+      </button>
+    </Dropdown>
+  );
+}

frontend/src/widgets/main/WorkspaceSelectionComponent.tsx

@@ -71,10 +71,10 @@ export const WorkspaceSelectionComponent = ({
 
       <div className="relative">
         <div
-          className="cursor-pointer rounded bg-gray-100 p-1 px-2 hover:bg-gray-200"
+          className="cursor-pointer rounded bg-gray-100 p-1 px-2 hover:bg-gray-200 dark:bg-gray-700 dark:hover:bg-gray-600"
           onClick={() => setIsDropdownOpen(!isDropdownOpen)}
         >
-          <div className="flex items-center justify-between text-sm">
+          <div className="flex items-center justify-between text-sm dark:text-gray-200">
             <div className="flex-1 truncate pr-1">
               {selectedWorkspace?.name || 'Select a workspace'}
             </div>
@@ -89,8 +89,8 @@ export const WorkspaceSelectionComponent = ({
         </div>
 
         {isDropdownOpen && (
-          <div className="absolute top-full right-0 left-0 z-50 mt-1 min-w-[250px] rounded-md border border-gray-200 bg-white shadow-lg md:right-auto md:left-0 md:min-w-full">
-            <div className="border-b border-gray-100 p-2">
+          <div className="absolute top-full right-0 left-0 z-50 mt-1 min-w-[250px] rounded-md border border-gray-200 bg-white shadow-lg md:right-auto md:left-0 md:min-w-full dark:border-gray-600 dark:bg-gray-800">
+            <div className="border-b border-gray-100 p-2 dark:border-gray-700">
               <Input
                 placeholder="Search workspaces..."
                 value={searchValue}
@@ -105,7 +105,7 @@ export const WorkspaceSelectionComponent = ({
               {filteredWorkspaces.map((workspace) => (
                 <div
                   key={workspace.id}
-                  className="cursor-pointer truncate px-3 py-2 text-sm hover:bg-gray-50"
+                  className="cursor-pointer truncate px-3 py-2 text-sm hover:bg-gray-50 dark:text-gray-200 dark:hover:bg-gray-700"
                   onClick={() => openWorkspace(workspace)}
                 >
                   {workspace.name}
@@ -113,13 +113,15 @@ export const WorkspaceSelectionComponent = ({
               ))}
 
               {filteredWorkspaces.length === 0 && searchValue && (
-                <div className="px-3 py-2 text-sm text-gray-500">No workspaces found</div>
+                <div className="px-3 py-2 text-sm text-gray-500 dark:text-gray-400">
+                  No workspaces found
+                </div>
               )}
             </div>
 
-            <div className="border-t border-gray-100">
+            <div className="border-t border-gray-100 dark:border-gray-700">
               <div
-                className="cursor-pointer px-3 py-2 text-sm text-blue-600 hover:bg-gray-50 hover:text-blue-700"
+                className="cursor-pointer px-3 py-2 text-sm text-blue-600 hover:bg-gray-50 hover:text-blue-700 dark:hover:bg-gray-700"
                 onClick={() => {
                   onCreateWorkspace();
                   setIsDropdownOpen(false);

install-postgresus.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e  # Exit on any error
+
 # Check if script is run as root
 if [ "$(id -u)" -ne 0 ]; then
     echo "Error: This script must be run as root (sudo ./install-postgresus.sh)" >&2
@@ -27,39 +29,88 @@ else
     log "Directory already exists: $INSTALL_DIR"
 fi
 
+# Detect OS
+detect_os() {
+    if [ -f /etc/os-release ]; then
+        . /etc/os-release
+        OS=$ID
+        VERSION_CODENAME=${VERSION_CODENAME:-}
+    else
+        log "ERROR: Cannot detect OS. /etc/os-release not found."
+        exit 1
+    fi
+}
+
 # Check if Docker is installed
 if ! command -v docker &> /dev/null; then
     log "Docker not found. Installing Docker..."
     
-    # Install Docker
+    detect_os
+    log "Detected OS: $OS, Codename: $VERSION_CODENAME"
+    
+    # Install prerequisites
     apt-get update
-    apt-get remove -y docker docker-engine docker.io containerd runc
-    apt-get install -y ca-certificates curl gnupg lsb-release
-    mkdir -p /etc/apt/keyrings
-    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
-    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+    apt-get install -y ca-certificates curl gnupg
+
+    # Set up Docker repository
+    install -m 0755 -d /etc/apt/keyrings
+    
+    # Determine Docker repo URL based on OS
+    case "$OS" in
+        ubuntu)
+            DOCKER_URL="https://download.docker.com/linux/ubuntu"
+            # Fallback for unsupported versions
+            case "$VERSION_CODENAME" in
+                plucky|oracular) VERSION_CODENAME="noble" ;;  # Ubuntu 25.x -> 24.04
+            esac
+            ;;
+        debian)
+            DOCKER_URL="https://download.docker.com/linux/debian"
+            # Fallback for unsupported versions
+            case "$VERSION_CODENAME" in
+                trixie|forky) VERSION_CODENAME="bookworm" ;;  # Debian 13/14 -> 12
+            esac
+            ;;
+        *)
+            log "ERROR: Unsupported OS: $OS. Please install Docker manually."
+            exit 1
+            ;;
+    esac
+    
+    log "Using Docker repository: $DOCKER_URL with codename: $VERSION_CODENAME"
+    
+    # Download and add Docker GPG key (no sudo needed - already root)
+    curl -fsSL "$DOCKER_URL/gpg" | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+    chmod a+r /etc/apt/keyrings/docker.gpg
+    
+    # Add Docker repository
+    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] $DOCKER_URL $VERSION_CODENAME stable" > /etc/apt/sources.list.d/docker.list
+    
     apt-get update
-    apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
+    apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+    
+    # Verify Docker installation
+    if ! command -v docker &> /dev/null; then
+        log "ERROR: Docker installation failed!"
+        exit 1
+    fi
+    
     log "Docker installed successfully"
 else
     log "Docker already installed"
 fi
 
-# Check if docker-compose is installed
-if ! command -v docker-compose &> /dev/null && ! command -v docker compose &> /dev/null; then
-    log "Docker Compose not found. Installing Docker Compose..."
-    apt-get update
-    apt-get install -y docker-compose-plugin
-    log "Docker Compose installed successfully"
+# Check if docker compose is available
+if ! docker compose version &> /dev/null; then
+    log "ERROR: Docker Compose plugin not available!"
+    exit 1
 else
-    log "Docker Compose already installed"
+    log "Docker Compose available"
 fi
 
 # Write docker-compose.yml
 log "Writing docker-compose.yml to $INSTALL_DIR"
 cat > "$INSTALL_DIR/docker-compose.yml" << 'EOF'
-version: "3"
-
 services:
   postgresus:
     container_name: postgresus
@@ -75,11 +126,15 @@ log "docker-compose.yml created successfully"
 # Start PostgresUS
 log "Starting PostgresUS..."
 cd "$INSTALL_DIR"
-docker compose up -d
-log "PostgresUS started successfully"
+if docker compose up -d; then
+    log "PostgresUS started successfully"
+else
+    log "ERROR: Failed to start PostgresUS!"
+    exit 1
+fi
 
 log "Postgresus installation completed successfully!"
 log "-------------------------------------------"
 log "To launch:"
 log "> cd $INSTALL_DIR && docker compose up -d"
-log "Access Postgresus at: http://localhost:4005"
+log "Access Postgresus at: http://localhost:4005"