refactor(interaction): separate view and update logic into modular files

- Extract slug editing logic to slug.go (slugView/slugUpdate)
- Extract commands menu logic to commands.go (commandsView/commandsUpdate)
- Extract coming soon modal to coming_soon.go (comingSoonView/comingSoonUpdate)
- Extract main dashboard logic to dashboard.go (dashboardView/dashboardUpdate)
- Create model.go for shared model struct and helper functions
- Replace math/rand with crypto/rand for random subdomain generation
- Remove legacy TLS cipher suite configuration

session/session.go

@@ -291,7 +291,11 @@ func (s *session) HandleHTTPForward(req *ssh.Request, portToBind uint16) {
 		}
 	}
 
-	randomString := random.GenerateRandomString(20)
+	randomString, err := random.GenerateRandomString(20)
+	if err != nil {
+		fail(fmt.Sprintf("Failed to create slug: %s", err), nil)
+		return
+	}
 	key := types.SessionKey{Id: randomString, Type: types.HTTP}
 	if !s.registry.Register(key, s) {
 		fail(fmt.Sprintf("Failed to register client with slug: %s", randomString), nil)
@@ -299,7 +303,7 @@ func (s *session) HandleHTTPForward(req *ssh.Request, portToBind uint16) {
 	}
 
 	buf := new(bytes.Buffer)
-	err := binary.Write(buf, binary.BigEndian, uint32(portToBind))
+	err = binary.Write(buf, binary.BigEndian, uint32(portToBind))
 	if err != nil {
 		fail(fmt.Sprintf("Failed to write port to buffer: %v", err), &key)
 		return