feat: theme config key, Ctrl+T cycle, themed status bar, glamour sync

@@ -13,6 +13,7 @@ 	"glint/internal/config"
 	"glint/internal/editor"
 	"glint/internal/picker"
 	"glint/internal/preview"
+	"glint/internal/theme"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/lipgloss"
@@ -40,6 +41,7 @@ // App is the root model.
 type App struct {
 	mode    Mode
 	cfg     config.Config
+	theme   theme.Theme
 	editor  *editor.Editor
 	preview *preview.Model
 	picker  *picker.Model
@@ -54,12 +56,17 @@ }
 
 // New builds an App with an empty editor.
 func New(cfg config.Config) *App {
-	return &App{
-		mode:    ModeEditor,
-		cfg:     cfg,
-		editor:  editor.New(),
-		preview: preview.New(cfg.GlamourStyle),
+	th := theme.Resolve(cfg.Theme)
+	ed := editor.New()
+	ed.SetTheme(th)
+	a := &App{
+		mode:   ModeEditor,
+		cfg:    cfg,
+		theme:  th,
+		editor: ed,
 	}
+	a.preview = preview.New(a.glamourStyle())
+	return a
 }
 
 // Load reads a file into the editor and switches to edit mode.
@@ -129,6 +136,8 @@ 	case tea.KeyCtrlS:
 		return a.save()
 	case tea.KeyCtrlR:
 		return a.togglePreview()
+	case tea.KeyCtrlT:
+		return a.cycleTheme()
 	case tea.KeyCtrlP:
 		if a.editor.Dirty && a.pending != discardPicker {
 			a.pending = discardPicker
@@ -183,6 +192,24 @@ 	a.status = "Saved " + a.path
 	return a, nil
 }
 
+// glamourStyle is the explicit config override if set, else the theme's style.
+func (a *App) glamourStyle() string {
+	if a.cfg.GlamourStyle != "" {
+		return a.cfg.GlamourStyle
+	}
+	return a.theme.GlamourStyle
+}
+
+// cycleTheme advances to the next theme and repaints the editor, preview, and
+// (if open) the picker.
+func (a *App) cycleTheme() (tea.Model, tea.Cmd) {
+	a.theme = theme.Next(a.theme.Name)
+	a.editor.SetTheme(a.theme)
+	a.preview.SetStyle(a.glamourStyle())
+	a.status = "Theme: " + a.theme.Name
+	return a, nil
+}
+
 // togglePreview switches between the editor and the Glamour read view.
 func (a *App) togglePreview() (tea.Model, tea.Cmd) {
 	if a.mode == ModePreview {
@@ -258,8 +285,8 @@ }
 
 func (a *App) statusBar() string {
 	bar := lipgloss.NewStyle().
-		Foreground(lipgloss.Color("#1a1a24")).
-		Background(lipgloss.Color("#7aa2f7")).
+		Foreground(a.theme.StatusFg).
+		Background(a.theme.StatusBg).
 		Width(maxInt(a.width, 1))
 	dirty := ""
 	if a.editor.Dirty {

@@ -295,3 +295,21 @@ 	if _, err := os.Stat(a.path); err != nil {
 		t.Errorf("second Ctrl+D: daily file should exist on disk: %v", err)
 	}
 }
+
+func TestCtrlTCyclesTheme(t *testing.T) {
+	cfg := config.Default()
+	cfg.Theme = "flexoki-light"
+	a := New(cfg)
+	a.Update(tea.WindowSizeMsg{Width: 80, Height: 24})
+	if a.theme.Name != "flexoki-light" {
+		t.Fatalf("initial theme = %q, want flexoki-light", a.theme.Name)
+	}
+	a.Update(tea.KeyMsg{Type: tea.KeyCtrlT})
+	if a.theme.Name != "flexoki-dark" {
+		t.Errorf("after one Ctrl+T = %q, want flexoki-dark", a.theme.Name)
+	}
+	a.Update(tea.KeyMsg{Type: tea.KeyCtrlT})
+	if a.theme.Name != "charm" {
+		t.Errorf("after two Ctrl+T = %q, want charm", a.theme.Name)
+	}
+}

@@ -17,16 +17,17 @@ 	VaultDir     string `toml:"vault_dir"`
 	DailySubdir  string `toml:"daily_subdir"`
 	DailyFormat  string `toml:"daily_format"`
 	GlamourStyle string `toml:"glamour_style"`
+	Theme        string `toml:"theme"`
 }
 
 // Default returns the built-in configuration used when no file is present.
 func Default() Config {
 	home, _ := os.UserHomeDir()
 	return Config{
-		VaultDir:     filepath.Join(home, "Humdrum"),
-		DailySubdir:  "Daily",
-		DailyFormat:  "2006-01-02",
-		GlamourStyle: "dark",
+		VaultDir:    filepath.Join(home, "Humdrum"),
+		DailySubdir: "Daily",
+		DailyFormat: "2006-01-02",
+		Theme:       "auto",
 	}
 }
 
@@ -65,6 +66,9 @@ 		cfg.DailyFormat = fileCfg.DailyFormat
 	}
 	if fileCfg.GlamourStyle != "" {
 		cfg.GlamourStyle = fileCfg.GlamourStyle
+	}
+	if fileCfg.Theme != "" {
+		cfg.Theme = fileCfg.Theme
 	}
 	return cfg, nil
 }

@@ -15,8 +15,11 @@ 	}
 	if d.DailyFormat != "2006-01-02" {
 		t.Errorf("DailyFormat = %q, want 2006-01-02", d.DailyFormat)
 	}
-	if d.GlamourStyle != "dark" {
-		t.Errorf("GlamourStyle = %q, want dark", d.GlamourStyle)
+	if d.GlamourStyle != "" {
+		t.Errorf("GlamourStyle default = %q, want empty (theme drives it)", d.GlamourStyle)
+	}
+	if d.Theme != "auto" {
+		t.Errorf("Theme = %q, want auto", d.Theme)
 	}
 	if d.VaultDir == "" {
 		t.Error("VaultDir should not be empty")
@@ -57,8 +60,23 @@ 	if cfg.DailyFormat != "20060102" {
 		t.Errorf("DailyFormat = %q", cfg.DailyFormat)
 	}
 	// unset key keeps default
-	if cfg.GlamourStyle != "dark" {
-		t.Errorf("GlamourStyle = %q, want default dark", cfg.GlamourStyle)
+	if cfg.GlamourStyle != "" {
+		t.Errorf("GlamourStyle = %q, want default empty", cfg.GlamourStyle)
+	}
+}
+
+func TestLoadFromFileOverlaysTheme(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "config.toml")
+	if err := os.WriteFile(path, []byte("theme = \"charm\"\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	cfg, err := loadFromFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Theme != "charm" {
+		t.Errorf("Theme = %q, want charm", cfg.Theme)
 	}
 }
 

@@ -40,6 +40,9 @@ 	m.vp.Width = w
 	m.vp.Height = h
 }
 
+// SetStyle changes the glamour style used by the next Render.
+func (m *Model) SetStyle(s string) { m.style = s }
+
 // Render runs markdown through Glamour and loads it into the viewport.
 func (m *Model) Render(markdown string) error {
 	r, err := m.renderer()