feat(ui): add theme toggle

README.md

@@ -14,6 +14,7 @@ This repository is an enhanced fork of the original [`lazyssh`](https://github.c
 - Proper handling of quoted entries such as `Host "example-name"`
 - Better fuzzy search relevance across alias, hostname, user, and tags
 - Daily workflow improvements such as a collapsible search bar, `0/1/2` panel switching, copy-host support, and persisted sort mode
+- Dark/light theme support with a persisted `T` toggle
 - A set of high-value fixes: backspace works correctly in inputs, `j/k` navigation survives mouse clicks, usernames support `@` and `:`, and alias alignment is more stable
 - Safer config writes for dotfiles and multi-machine sync: symlinks are preserved and `IdentityFile` is normalized to portable `~/.ssh/...` paths whenever possible
 
@@ -230,6 +231,7 @@ make run
 | `p` | Pin or unpin a host |
 | `s` | Switch the sort field |
 | `S` | Reverse the sort order |
+| `T` | Toggle dark/light theme |
 | `0` / `1` / `2` | Focus the search bar / host list / details panel |
 | `q` | Quit |
 

README.zh-CN.md

@@ -14,6 +14,7 @@
 - 兼容带引号的 `Host "example-name"` 条目，避免因为别名格式导致列表展示、删除或连接行为异常
 - 搜索改为更实用的模糊相关性排序，按别名、主机、用户、标签综合匹配
 - 增强了日常使用体验：可折叠搜索栏、`0/1/2` 面板切换、复制 Host、记住排序方式
+- 支持暗色 / 亮色主题，并可通过 `T` 切换和记住偏好
 - 合并了一批高价值修复：输入框退格恢复正常、鼠标点击后 `j/k` 仍可导航、用户名支持 `@` 和 `:`、列表别名对齐更稳定
 - 配置写回更适合 dotfiles / 多机同步：保留符号链接不被写坏，`IdentityFile` 会尽量写成 `~/.ssh/...` 这种可移植格式
 
@@ -230,6 +231,7 @@ make run
 | `p` | 置顶 / 取消置顶 |
 | `s` | 切换排序字段 |
 | `S` | 反转排序顺序 |
+| `T` | 切换暗色 / 亮色主题 |
 | `0` / `1` / `2` | 聚焦搜索栏 / 主机列表 / 详情面板 |
 | `q` | 退出 |
 

internal/adapters/data/ssh_config_file/crud.go

@@ -20,8 +20,8 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/urzeye/lazyssh/internal/core/domain"
 	"github.com/kevinburke/ssh_config"
+	"github.com/urzeye/lazyssh/internal/core/domain"
 )
 
 const (

internal/adapters/data/ssh_config_file/include.go

@@ -21,8 +21,8 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/urzeye/lazyssh/internal/core/domain"
 	"github.com/kevinburke/ssh_config"
+	"github.com/urzeye/lazyssh/internal/core/domain"
 )
 
 // loadAllServers loads servers from the main SSH config and all recursively

internal/adapters/data/ssh_config_file/mapper.go

@@ -19,8 +19,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/urzeye/lazyssh/internal/core/domain"
 	"github.com/kevinburke/ssh_config"
+	"github.com/urzeye/lazyssh/internal/core/domain"
 )
 
 var effectiveSingleValueKeys = []string{

internal/adapters/ui/handlers.go

@@ -77,6 +77,9 @@ func (t *tui) handleGlobalKeys(event *tcell.EventKey) *tcell.EventKey {
 	case 'S':
 		t.handleSortReverse()
 		return nil
+	case 'T':
+		t.handleThemeToggle()
+		return nil
 	case 'c':
 		t.handleCopyCommand()
 		return nil
@@ -142,6 +145,13 @@ func (t *tui) handleSortReverse() {
 	t.refreshServerList()
 }
 
+func (t *tui) handleThemeToggle() {
+	t.themeMode = t.themeMode.Toggle()
+	t.persistThemeMode()
+	t.rebuildMainUI()
+	t.showStatusTemp("Theme: " + t.themeMode.String())
+}
+
 func (t *tui) handleCopyCommand() {
 	if server, ok := t.serverList.GetSelectedServer(); ok {
 		cmd := BuildSSHCommand(server)
@@ -167,7 +177,7 @@ func (t *tui) handleCopyHost() {
 func (t *tui) handleTagsEdit() {
 	if server, ok := t.serverList.GetSelectedServer(); ok {
 		if server.Readonly {
-			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), "#FFCC66")
+			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), CurrentTheme.Warning)
 			return
 		}
 		t.showEditTagsForm(server)
@@ -289,7 +299,7 @@ func (t *tui) handleServerSelectionChange(server domain.Server) {
 
 func (t *tui) handleServerAdd() {
 	if t.serverService.IsReadOnly() {
-		t.showStatusTempColor("Read-only mode: SSH config changes are disabled", "#FFCC66")
+		t.showStatusTempColor("Read-only mode: SSH config changes are disabled", CurrentTheme.Warning)
 		return
 	}
 
@@ -304,7 +314,7 @@ func (t *tui) handleServerAdd() {
 func (t *tui) handleServerEdit() {
 	if server, ok := t.serverList.GetSelectedServer(); ok {
 		if server.Readonly {
-			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), "#FFCC66")
+			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), CurrentTheme.Warning)
 			return
 		}
 		form := NewServerForm(ServerFormEdit, &server).
@@ -342,7 +352,7 @@ func (t *tui) handleServerSave(server domain.Server, original *domain.Server) {
 func (t *tui) handleServerDelete() {
 	if server, ok := t.serverList.GetSelectedServer(); ok {
 		if server.Readonly {
-			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), "#FF6B6B")
+			t.showStatusTempColor(fmt.Sprintf("Read-only: %s is managed in %s", server.Alias, server.SourceFile), CurrentTheme.Error)
 			return
 		}
 		t.showDeleteConfirmModal(server)
@@ -362,13 +372,13 @@ func (t *tui) handlePingSelected() {
 			up, dur, err := t.serverService.Ping(server)
 			t.app.QueueUpdateDraw(func() {
 				if err != nil {
-					t.showStatusTempColor(fmt.Sprintf("Ping %s: DOWN (%v)", alias, err), "#FF6B6B")
+					t.showStatusTempColor(fmt.Sprintf("Ping %s: DOWN (%v)", alias, err), CurrentTheme.Error)
 					return
 				}
 				if up {
-					t.showStatusTempColor(fmt.Sprintf("Ping %s: UP (%s)", alias, dur), "#A0FFA0")
+					t.showStatusTempColor(fmt.Sprintf("Ping %s: UP (%s)", alias, dur), CurrentTheme.Success)
 				} else {
-					t.showStatusTempColor(fmt.Sprintf("Ping %s: DOWN", alias), "#FF6B6B")
+					t.showStatusTempColor(fmt.Sprintf("Ping %s: DOWN", alias), CurrentTheme.Error)
 				}
 			})
 		}()
@@ -394,7 +404,7 @@ func (t *tui) handleRefreshBackground() {
 		servers, err := t.serverService.ListServers(q)
 		if err != nil {
 			t.app.QueueUpdateDraw(func() {
-				t.showStatusTempColor(fmt.Sprintf("Refresh failed: %v", err), "#FF6B6B")
+				t.showStatusTempColor(fmt.Sprintf("Refresh failed: %v", err), CurrentTheme.Error)
 			})
 			return
 		}
@@ -557,12 +567,12 @@ func (t *tui) showPortForwardForm(server domain.Server) {
 
 	form.AddButton("Start", func() {
 		if err := validatePort(portVal); err != nil {
-			t.showStatusTempColor("Invalid port: "+err.Error(), "#FF6B6B")
+			t.showStatusTempColor("Invalid port: "+err.Error(), CurrentTheme.Error)
 			return
 		}
 		if bindAddrVal != "" {
 			if err := validateBindAddress(bindAddrVal); err != nil {
-				t.showStatusTempColor("Invalid bind address: "+err.Error(), "#FF6B6B")
+				t.showStatusTempColor("Invalid bind address: "+err.Error(), CurrentTheme.Error)
 				return
 			}
 		}
@@ -577,11 +587,11 @@ func (t *tui) showPortForwardForm(server domain.Server) {
 			args = append(args, "-D", spec)
 		} else {
 			if err := validateHost(hostVal); err != nil {
-				t.showStatusTempColor("Invalid host: "+err.Error(), "#FF6B6B")
+				t.showStatusTempColor("Invalid host: "+err.Error(), CurrentTheme.Error)
 				return
 			}
 			if err := validatePort(hostPortVal); err != nil {
-				t.showStatusTempColor("Invalid host port: "+err.Error(), "#FF6B6B")
+				t.showStatusTempColor("Invalid host port: "+err.Error(), CurrentTheme.Error)
 				return
 			}
 			spec := portVal + ":" + hostVal + ":" + hostPortVal
@@ -604,7 +614,7 @@ func (t *tui) showPortForwardForm(server domain.Server) {
 				pid, err := t.serverService.StartForward(alias, args)
 				t.app.QueueUpdateDraw(func() {
 					if err != nil {
-						t.showStatusTempColor("Forward failed: "+err.Error(), "#FF6B6B")
+						t.showStatusTempColor("Forward failed: "+err.Error(), CurrentTheme.Error)
 					} else {
 						t.refreshServerList()
 						t.showStatusTemp(fmt.Sprintf("Port forwarding started (pid %d)", pid))
@@ -687,7 +697,7 @@ func (t *tui) showStatusTemp(msg string) {
 	if t.statusBar == nil {
 		return
 	}
-	t.showStatusTempColor(msg, "#A0FFA0")
+	t.showStatusTempColor(msg, CurrentTheme.Success)
 }
 
 // showStatusTempColor displays a temporary colored message in the status bar and restores default text after 2s.
@@ -715,7 +725,7 @@ func (t *tui) handleStopForwarding() {
 			err := t.serverService.StopForwarding(alias)
 			t.app.QueueUpdateDraw(func() {
 				if err != nil {
-					t.showStatusTempColor("Failed to stop forwarding: "+err.Error(), "#FF6B6B")
+					t.showStatusTempColor("Failed to stop forwarding: "+err.Error(), CurrentTheme.Error)
 				} else {
 					t.showStatusTemp("Stopped forwarding for " + alias)
 				}

internal/adapters/ui/header.go

@@ -41,7 +41,7 @@ func NewAppHeader(version, gitCommit, repoURL string) *AppHeader {
 }
 
 func (h *AppHeader) build() {
-	headerBg := tcell.Color234
+	headerBg := CurrentTheme.HeaderBackground
 
 	left := h.buildLeftSection(headerBg)
 	center := h.buildCenterSection(headerBg)
@@ -64,7 +64,8 @@ func (h *AppHeader) buildLeftSection(bg tcell.Color) *tview.TextView {
 		SetDynamicColors(true).
 		SetTextAlign(tview.AlignLeft)
 	left.SetBackgroundColor(bg)
-	stylizedName := "🚀 [#FFFFFF::b]lazy[-][#55D7FF::b]ssh[-]"
+	stylizedName := "🚀 [" + CurrentTheme.AliasText + "::b]lazy[-]" +
+		"[" + CurrentTheme.AccentStrong + "::b]ssh[-]"
 	left.SetText(stylizedName)
 	return left
 }
@@ -78,10 +79,10 @@ func (h *AppHeader) buildCenterSection(bg tcell.Color) *tview.TextView {
 	commit := shortCommit(h.gitCommit)
 
 	// Build tag-like chips for version, commit, and build time
-	versionTag := makeTag(h.version, "#22C55E") // green
+	versionTag := makeTag(h.version, CurrentTheme.Success)
 	commitTag := ""
 	if commit != "" {
-		commitTag = makeTag(commit, "#A78BFA") // violet
+		commitTag = makeTag(commit, CurrentTheme.AccentStrong)
 	}
 
 	text := versionTag
@@ -99,14 +100,17 @@ func (h *AppHeader) buildRightSection(bg tcell.Color) *tview.TextView {
 		SetTextAlign(tview.AlignRight)
 	right.SetBackgroundColor(bg)
 	currentTime := time.Now().Format("Mon, 02 Jan 2006 15:04")
-	right.SetText("[#55AAFF::u]🔗 " + h.repoURL + "[-]  [#AAAAAA]• " + currentTime + "[-]")
+	right.SetText(
+		"[" + CurrentTheme.Accent + "::u]🔗 " + h.repoURL + "[-]  " +
+			colorText(CurrentTheme.HostText, "• "+currentTime),
+	)
 	return right
 }
 
 func (h *AppHeader) createSeparator() *tview.TextView {
 	separator := tview.NewTextView().SetDynamicColors(true)
-	separator.SetBackgroundColor(tcell.Color235)
-	separator.SetText("[#444444]" + strings.Repeat("─", 200) + "[-]")
+	separator.SetBackgroundColor(CurrentTheme.StatusBackground)
+	separator.SetText(colorText(CurrentTheme.Separator, strings.Repeat("─", 200)))
 	return separator
 }
 

internal/adapters/ui/hint_bar.go

@@ -14,14 +14,14 @@
 
 package ui
 
-import (
-	"github.com/gdamore/tcell/v2"
-	"github.com/rivo/tview"
-)
+import "github.com/rivo/tview"
 
 func NewHintBar() *tview.TextView {
 	hint := tview.NewTextView().SetDynamicColors(true)
-	hint.SetBackgroundColor(tcell.Color233)
-	hint.SetText("[#BBBBBB]Press [::b]/[-:-:b] or [::b]0[-:-:b] to search  •  [::b]1[-:-:b] Servers  •  [::b]2[-:-:b] Details[-]")
+	hint.SetBackgroundColor(CurrentTheme.InputBackground)
+	hint.SetText(
+		colorText(CurrentTheme.HostText, "Press ") +
+			"[::b]/[-:-:b] or [::b]0[-:-:b] to search  •  [::b]1[-:-:b] Servers  •  [::b]2[-:-:b] Details[-]",
+	)
 	return hint
 }

internal/adapters/ui/search_bar.go

@@ -36,14 +36,14 @@ func NewSearchBar() *SearchBar {
 
 func (s *SearchBar) build() {
 	s.InputField.SetLabel(" 🔍 Search: ").
-		SetFieldBackgroundColor(tcell.Color233).
-		SetFieldTextColor(tcell.Color252).
+		SetFieldBackgroundColor(CurrentTheme.InputBackground).
+		SetFieldTextColor(CurrentTheme.PrimaryText).
 		SetFieldWidth(30).
 		SetBorder(true).
 		SetTitle(" 0 Search ").
 		SetTitleAlign(tview.AlignCenter).
-		SetBorderColor(tcell.Color238).
-		SetTitleColor(tcell.Color250)
+		SetBorderColor(CurrentTheme.Border).
+		SetTitleColor(CurrentTheme.Title)
 
 	s.InputField.SetChangedFunc(func(text string) {
 		if s.onSearch != nil {

internal/adapters/ui/server_details.go

@@ -18,9 +18,8 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/urzeye/lazyssh/internal/core/domain"
-	"github.com/gdamore/tcell/v2"
 	"github.com/rivo/tview"
+	"github.com/urzeye/lazyssh/internal/core/domain"
 )
 
 type ServerDetails struct {
@@ -41,8 +40,8 @@ func (sd *ServerDetails) build() {
 		SetBorder(true).
 		SetTitle(" 2 Details ").
 		SetTitleAlign(tview.AlignCenter).
-		SetBorderColor(tcell.Color238).
-		SetTitleColor(tcell.Color250)
+		SetBorderColor(CurrentTheme.Border).
+		SetTitleColor(CurrentTheme.Title)
 }
 
 // renderTagChips builds colored tag chips for details view.
@@ -52,7 +51,7 @@ func renderTagChips(tags []string) string {
 	}
 	chips := make([]string, 0, len(tags))
 	for _, t := range tags {
-		chips = append(chips, fmt.Sprintf("[black:#5FAFFF] %s [-:-:-]", t))
+		chips = append(chips, fmt.Sprintf("[%s:%s] %s [-:-:-]", CurrentTheme.TagText, CurrentTheme.TagBack, t))
 	}
 	return strings.Join(chips, " ")
 }
@@ -89,12 +88,33 @@ func (sd *ServerDetails) UpdateServer(server domain.Server) {
 	if server.Port == 0 {
 		portText = ""
 	}
+	valueColor := CurrentTheme.AliasText
 
 	text := fmt.Sprintf(
-		"[::b]%s[-]\n\n[::b]Basic Settings:[-]\n  Host: [white]%s[-]\n  User: [white]%s[-]\n  Port: [white]%s[-]\n  Key:  [white]%s[-]\n  Source: [white]%s[-]\n  Editable: [white]%s[-]\n  Tags: %s\n  Pinned: [white]%s[-]\n  Last SSH: %s\n  SSH Count: [white]%d[-]\n",
-		aliasText, hostText, userText, portText,
-		serverKey, sourceText, editableText, tagsText, pinnedStr,
-		lastSeen, server.SSHCount)
+		"[::b]%s[-]\n\n"+
+			"[::b]Basic Settings:[-]\n"+
+			"  Host: [%s]%s[-]\n"+
+			"  User: [%s]%s[-]\n"+
+			"  Port: [%s]%s[-]\n"+
+			"  Key:  [%s]%s[-]\n"+
+			"  Source: [%s]%s[-]\n"+
+			"  Editable: [%s]%s[-]\n"+
+			"  Tags: %s\n"+
+			"  Pinned: [%s]%s[-]\n"+
+			"  Last SSH: %s\n"+
+			"  SSH Count: [%s]%d[-]\n",
+		aliasText,
+		valueColor, hostText,
+		valueColor, userText,
+		valueColor, portText,
+		valueColor, serverKey,
+		valueColor, sourceText,
+		valueColor, editableText,
+		tagsText,
+		valueColor, pinnedStr,
+		lastSeen,
+		valueColor, server.SSHCount,
+	)
 
 	// Advanced settings section (only show non-empty fields)
 	// Organized by logical grouping for better readability
@@ -211,7 +231,7 @@ func (sd *ServerDetails) UpdateServer(server domain.Server) {
 		for _, field := range group.fields {
 			if field.value != "" {
 				hasAdvanced = true
-				advancedText += fmt.Sprintf("  %s: [white]%s[-]\n", field.name, field.value)
+				advancedText += fmt.Sprintf("  %s: [%s]%s[-]\n", field.name, valueColor, field.value)
 			}
 		}
 	}