feat: add SSH connection history with Ctrl+H navigation

Track SSH connections (configured + manual) with searchable history view.
Press Ctrl+H to view history, Ctrl+L to return. Add manual connections
to config with 'a'.

- Parse and store manual SSH connections
- History TUI with search and filtering
- Connection count and timestamps

internal/history/history.go

@@ -2,6 +2,7 @@ package history
 
 import (
 	"encoding/json"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
@@ -306,3 +307,99 @@ func (hm *HistoryManager) GetPortForwardingConfig(hostName string) *PortForwardC
 	}
 	return nil
 }
+
+// ManualConnection represents a manual SSH connection (e.g., ssh user@host -p 2222)
+type ManualConnection struct {
+	User     string
+	Hostname string
+	Port     string
+	Identity string
+}
+
+// RecordManualConnection records a manual SSH connection (like ssh user@host -p 2222 -i key)
+// These are stored with a generated host name like "manual:user@host:port"
+func (hm *HistoryManager) RecordManualConnection(conn ManualConnection) error {
+	// Generate a unique identifier for this manual connection
+	hostID := generateManualHostID(conn)
+
+	now := time.Now()
+
+	if existingConn, exists := hm.history.Connections[hostID]; exists {
+		// Update existing connection
+		existingConn.LastConnect = now
+		existingConn.ConnectCount++
+		hm.history.Connections[hostID] = existingConn
+	} else {
+		// Create new connection record
+		hm.history.Connections[hostID] = ConnectionInfo{
+			HostName:     hostID,
+			LastConnect:  now,
+			ConnectCount: 1,
+		}
+	}
+
+	return hm.saveHistory()
+}
+
+// generateManualHostID generates a unique ID for manual connections
+func generateManualHostID(conn ManualConnection) string {
+	// Format: manual:user@hostname:port
+	user := conn.User
+	if user == "" {
+		user = "default"
+	}
+	port := conn.Port
+	if port == "" {
+		port = "22"
+	}
+	return fmt.Sprintf("manual:%s@%s:%s", user, conn.Hostname, port)
+}
+
+// IsManualConnection checks if a hostname represents a manual connection
+func IsManualConnection(hostName string) bool {
+	return len(hostName) > 7 && hostName[:7] == "manual:"
+}
+
+// ParseManualConnectionID parses a manual connection ID back into its components
+func ParseManualConnectionID(hostID string) (user, hostname, port string, ok bool) {
+	if !IsManualConnection(hostID) {
+		return "", "", "", false
+	}
+
+	// Remove "manual:" prefix
+	parts := hostID[7:] // Skip "manual:"
+
+	// Split by last ':'
+	lastColon := -1
+	for i := len(parts) - 1; i >= 0; i-- {
+		if parts[i] == ':' {
+			lastColon = i
+			break
+		}
+	}
+
+	if lastColon == -1 {
+		return "", "", "", false
+	}
+
+	port = parts[lastColon+1:]
+	userHost := parts[:lastColon]
+
+	// Split user@host
+	atSign := -1
+	for i := 0; i < len(userHost); i++ {
+		if userHost[i] == '@' {
+			atSign = i
+			break
+		}
+	}
+
+	if atSign == -1 {
+		return "", "", "", false
+	}
+
+	user = userHost[:atSign]
+	hostname = userHost[atSign+1:]
+
+	return user, hostname, port, true
+}

internal/history/parser.go

@@ -0,0 +1,95 @@
+package history
+
+import (
+	"os/user"
+	"strings"
+)
+
+// ParseSSHArgs parses SSH command line arguments and extracts connection details
+// It handles formats like: user@host, -p port, -i identity, etc.
+func ParseSSHArgs(args []string) (*ManualConnection, bool) {
+	if len(args) == 0 {
+		return nil, false
+	}
+
+	conn := &ManualConnection{
+		Port: "22", // Default SSH port
+	}
+
+	// Get current user as default
+	currentUser, err := user.Current()
+	if err == nil {
+		conn.User = currentUser.Username
+	}
+
+	// Parse arguments
+	for i := 0; i < len(args); i++ {
+		arg := args[i]
+
+		// Handle -p <port> or -p<port>
+		if arg == "-p" {
+			if i+1 < len(args) {
+				conn.Port = args[i+1]
+				i++
+			}
+		} else if strings.HasPrefix(arg, "-p") {
+			conn.Port = arg[2:]
+		} else if arg == "-i" {
+			// Handle -i <identity>
+			if i+1 < len(args) {
+				conn.Identity = args[i+1]
+				i++
+			}
+		} else if arg == "-F" || arg == "-c" || arg == "--config" {
+			// Skip config file arguments - these are handled separately
+			if i+1 < len(args) {
+				i++
+			}
+			return nil, false
+		} else if strings.HasPrefix(arg, "-") {
+			// Skip other SSH options like -v, -A, -X, etc.
+			// If they have a value, skip it too
+			if i+1 < len(args) && !strings.HasPrefix(args[i+1], "-") {
+				i++
+			}
+			continue
+		} else if strings.Contains(arg, "@") {
+			// Parse user@hostname
+			parts := strings.SplitN(arg, "@", 2)
+			if len(parts) == 2 {
+				conn.User = parts[0]
+				conn.Hostname = parts[1]
+			}
+		} else if conn.Hostname == "" {
+			// If no @, treat as just hostname
+			conn.Hostname = arg
+		}
+	}
+
+	// If we got a hostname, this is a valid manual connection
+	if conn.Hostname != "" {
+		return conn, true
+	}
+
+	return nil, false
+}
+
+// IsManualSSHCommand checks if the arguments represent a manual SSH connection
+// (not a configured host name)
+func IsManualSSHCommand(args []string) bool {
+	if len(args) == 0 {
+		return false
+	}
+
+	// Check for SSH flags that indicate manual connection
+	for _, arg := range args {
+		if arg == "-p" || strings.HasPrefix(arg, "-p") {
+			return true
+		}
+		if strings.Contains(arg, "@") {
+			return true
+		}
+	}
+
+	return false
+}

internal/history/parser_test.go

@@ -0,0 +1,277 @@
+package history
+
+import (
+	"testing"
+)
+
+func TestParseSSHArgs(t *testing.T) {
+	tests := []struct {
+		name     string
+		args     []string
+		wantConn *ManualConnection
+		wantOk   bool
+	}{
+		{
+			name: "user@host",
+			args: []string{"user@example.com"},
+			wantConn: &ManualConnection{
+				User:     "user",
+				Hostname: "example.com",
+				Port:     "22",
+			},
+			wantOk: true,
+		},
+		{
+			name: "user@host with -p port",
+			args: []string{"-p", "2222", "user@example.com"},
+			wantConn: &ManualConnection{
+				User:     "user",
+				Hostname: "example.com",
+				Port:     "2222",
+			},
+			wantOk: true,
+		},
+		{
+			name: "user@host with -p2222 (no space)",
+			args: []string{"-p2222", "user@example.com"},
+			wantConn: &ManualConnection{
+				User:     "user",
+				Hostname: "example.com",
+				Port:     "2222",
+			},
+			wantOk: true,
+		},
+		{
+			name: "user@host with -i identity",
+			args: []string{"-i", "~/.ssh/id_rsa", "user@example.com"},
+			wantConn: &ManualConnection{
+				User:     "user",
+				Hostname: "example.com",
+				Port:     "22",
+				Identity: "~/.ssh/id_rsa",
+			},
+			wantOk: true,
+		},
+		{
+			name: "complete connection",
+			args: []string{"-p", "2222", "-i", "~/.ssh/id_rsa", "guillaume@127.0.0.1"},
+			wantConn: &ManualConnection{
+				User:     "guillaume",
+				Hostname: "127.0.0.1",
+				Port:     "2222",
+				Identity: "~/.ssh/id_rsa",
+			},
+			wantOk: true,
+		},
+		{
+			name: "just hostname (no user)",
+			args: []string{"example.com"},
+			wantConn: &ManualConnection{
+				Hostname: "example.com",
+				Port:     "22",
+				// User will be current system user, so we don't check it
+			},
+			wantOk: true,
+		},
+		{
+			name:     "config file args should return false",
+			args:     []string{"-F", "~/.ssh/config", "host"},
+			wantConn: nil,
+			wantOk:   false,
+		},
+		{
+			name:     "empty args",
+			args:     []string{},
+			wantConn: nil,
+			wantOk:   false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotConn, gotOk := ParseSSHArgs(tt.args)
+
+			if gotOk != tt.wantOk {
+				t.Errorf("ParseSSHArgs() gotOk = %v, want %v", gotOk, tt.wantOk)
+				return
+			}
+
+			if !tt.wantOk {
+				if gotConn != nil {
+					t.Errorf("ParseSSHArgs() gotConn = %v, want nil", gotConn)
+				}
+				return
+			}
+
+			if gotConn == nil {
+				t.Errorf("ParseSSHArgs() gotConn = nil, want non-nil")
+				return
+			}
+
+			if gotConn.User != tt.wantConn.User {
+				// Skip user check if wantConn.User is empty (current user)
+				if tt.wantConn.User != "" {
+					t.Errorf("ParseSSHArgs() User = %v, want %v", gotConn.User, tt.wantConn.User)
+				}
+			}
+			if gotConn.Hostname != tt.wantConn.Hostname {
+				t.Errorf("ParseSSHArgs() Hostname = %v, want %v", gotConn.Hostname, tt.wantConn.Hostname)
+			}
+			if gotConn.Port != tt.wantConn.Port {
+				t.Errorf("ParseSSHArgs() Port = %v, want %v", gotConn.Port, tt.wantConn.Port)
+			}
+			if gotConn.Identity != tt.wantConn.Identity {
+				t.Errorf("ParseSSHArgs() Identity = %v, want %v", gotConn.Identity, tt.wantConn.Identity)
+			}
+		})
+	}
+}
+
+func TestIsManualSSHCommand(t *testing.T) {
+	tests := []struct {
+		name string
+		args []string
+		want bool
+	}{
+		{
+			name: "user@host is manual",
+			args: []string{"user@example.com"},
+			want: true,
+		},
+		{
+			name: "with -p flag is manual",
+			args: []string{"-p", "2222", "host"},
+			want: true,
+		},
+		{
+			name: "with -p2222 is manual",
+			args: []string{"-p2222", "host"},
+			want: true,
+		},
+		{
+			name: "just hostname is not manual",
+			args: []string{"myhost"},
+			want: false,
+		},
+		{
+			name: "empty is not manual",
+			args: []string{},
+			want: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := IsManualSSHCommand(tt.args); got != tt.want {
+				t.Errorf("IsManualSSHCommand() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestManualConnectionID(t *testing.T) {
+	tests := []struct {
+		name         string
+		conn         ManualConnection
+		wantHostID   string
+		wantUser     string
+		wantHostname string
+		wantPort     string
+	}{
+		{
+			name: "complete connection",
+			conn: ManualConnection{
+				User:     "guillaume",
+				Hostname: "127.0.0.1",
+				Port:     "2222",
+				Identity: "~/.ssh/id_rsa",
+			},
+			wantHostID:   "manual:guillaume@127.0.0.1:2222",
+			wantUser:     "guillaume",
+			wantHostname: "127.0.0.1",
+			wantPort:     "2222",
+		},
+		{
+			name: "default port",
+			conn: ManualConnection{
+				User:     "user",
+				Hostname: "example.com",
+				Port:     "",
+			},
+			wantHostID:   "manual:user@example.com:22",
+			wantUser:     "user",
+			wantHostname: "example.com",
+			wantPort:     "22",
+		},
+		{
+			name: "no user specified",
+			conn: ManualConnection{
+				Hostname: "example.com",
+				Port:     "2222",
+			},
+			wantHostID:   "manual:default@example.com:2222",
+			wantUser:     "default",
+			wantHostname: "example.com",
+			wantPort:     "2222",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Test generation
+			gotHostID := generateManualHostID(tt.conn)
+			if gotHostID != tt.wantHostID {
+				t.Errorf("generateManualHostID() = %v, want %v", gotHostID, tt.wantHostID)
+			}
+
+			// Test IsManualConnection
+			if !IsManualConnection(gotHostID) {
+				t.Errorf("IsManualConnection(%v) = false, want true", gotHostID)
+			}
+
+			// Test parsing
+			user, hostname, port, ok := ParseManualConnectionID(gotHostID)
+			if !ok {
+				t.Errorf("ParseManualConnectionID() ok = false, want true")
+			}
+			if user != tt.wantUser {
+				t.Errorf("ParseManualConnectionID() user = %v, want %v", user, tt.wantUser)
+			}
+			if hostname != tt.wantHostname {
+				t.Errorf("ParseManualConnectionID() hostname = %v, want %v", hostname, tt.wantHostname)
+			}
+			if port != tt.wantPort {
+				t.Errorf("ParseManualConnectionID() port = %v, want %v", port, tt.wantPort)
+			}
+		})
+	}
+}
+
+func TestParseManualConnectionID_Invalid(t *testing.T) {
+	tests := []struct {
+		name   string
+		hostID string
+	}{
+		{
+			name:   "not a manual connection",
+			hostID: "myhost",
+		},
+		{
+			name:   "missing components",
+			hostID: "manual:invalid",
+		},
+		{
+			name:   "no @ sign",
+			hostID: "manual:hostname:22",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, _, _, ok := ParseManualConnectionID(tt.hostID)
+			if ok {
+				t.Errorf("ParseManualConnectionID() ok = true, want false for invalid input")
+			}
+		})
+	}
+}