Phase 5: TUI client (Bubbletea)

- cmd/tui/main.go: entry point with --server, --token, --version flags
- cmd/tui/config.go: config from ~/.config/dumpster/config.yaml or env vars
- cmd/tui/auth.go: login flow, session cookie management
- cmd/tui/api.go: HTTP client for servers, channels, messages, voice
- cmd/tui/model.go: root bubbletea model with state management
- cmd/tui/theme.go: Gruvbox dark lipgloss styles
- cmd/tui/servers.go: server bar with [D] style initials
- cmd/tui/channels.go: channel list with #text and 🔊 voice
- cmd/tui/chat.go: IRC-style message viewport with colored usernames
- cmd/tui/input.go: message input with > _ prompt
- cmd/tui/members.go: member list with ●/◐/○ status
- cmd/tui/ws.go: WebSocket client for real-time events
- cmd/tui/voice.go: voice state tracking and mute toggle
- cmd/tui/keys.go: vim-style keybindings (j/k, g/G, Tab, /, etc)
- cmd/tui/views.go: multi-pane layout rendering
- Makefile: added build-tui and run-tui targets
- go.mod/go.sum: added charmbracelet dependencies

cmd/tui/theme.go

@@ -0,0 +1,159 @@
+package main
+
+import "github.com/charmbracelet/lipgloss"
+
+// Gruvbox dark palette
+var (
+	bg   = lipgloss.Color("#282828")
+	bgS  = lipgloss.Color("#3c3836")
+	bgT  = lipgloss.Color("#504945")
+	fg   = lipgloss.Color("#ebdbb2")
+	fgS  = lipgloss.Color("#d5c4a1")
+	fgF  = lipgloss.Color("#a89984")
+	red  = lipgloss.Color("#fb4934")
+	grn  = lipgloss.Color("#b8bb26")
+	org  = lipgloss.Color("#fe8019")
+	aqua = lipgloss.Color("#8ec07c")
+	yel  = lipgloss.Color("#fabd2f")
+)
+
+// Styles
+var (
+	// Layout panes
+	ServerBarStyle = lipgloss.NewStyle().
+			Background(bgS).
+			Foreground(fg).
+			Padding(0, 1).
+			Border(lipgloss.NormalBorder(), false, true, false, false).
+			BorderForeground(bgT)
+
+	ChannelListStyle = lipgloss.NewStyle().
+				Background(bgS).
+				Foreground(fg).
+				Padding(0, 1)
+
+	ChatPaneStyle = lipgloss.NewStyle().
+			Background(bg).
+			Foreground(fg).
+			Padding(0, 1)
+
+	MemberListStyle = lipgloss.NewStyle().
+			Background(bgS).
+			Foreground(fg).
+			Padding(0, 1)
+
+	InputPaneStyle = lipgloss.NewStyle().
+			Background(bgS).
+			Foreground(fg).
+			Padding(0, 1)
+
+	// Focus indicators
+	FocusedBorder = lipgloss.NewStyle().
+			Border(lipgloss.NormalBorder(), false, false, true, false).
+			BorderForeground(aqua)
+
+	UnfocusedBorder = lipgloss.NewStyle().
+				Border(lipgloss.NormalBorder(), false, false, true, false).
+				BorderForeground(bgT)
+
+	// Server list
+	ServerActive = lipgloss.NewStyle().
+			Background(aqua).
+			Foreground(bg).
+			Bold(true).
+			Padding(0, 1).
+			Align(lipgloss.Center)
+
+	ServerInactive = lipgloss.NewStyle().
+			Background(bgS).
+			Foreground(fgF).
+			Padding(0, 1).
+			Align(lipgloss.Center)
+
+	ServerHover = lipgloss.NewStyle().
+			Background(bgT).
+			Foreground(fg).
+			Padding(0, 1).
+			Align(lipgloss.Center)
+
+	// Channel list
+	CategoryStyle = lipgloss.NewStyle().
+			Foreground(fgF).
+			Bold(true).
+			PaddingTop(1)
+
+	ChannelActive = lipgloss.NewStyle().
+			Foreground(fg).
+			Bold(true).
+			PaddingLeft(1)
+
+	ChannelInactive = lipgloss.NewStyle().
+			Foreground(fgF).
+			PaddingLeft(1)
+
+	ChannelHover = lipgloss.NewStyle().
+			Foreground(fg).
+			PaddingLeft(1)
+
+	VoiceChannelPrefix = lipgloss.NewStyle().Foreground(aqua)
+	TextChannelPrefix  = lipgloss.NewStyle().Foreground(fgF)
+
+	// Chat
+	MessageStyle = lipgloss.NewStyle().
+			Foreground(fg)
+
+	TimestampStyle = lipgloss.NewStyle().
+			Foreground(fgF)
+
+	UsernameStyle = lipgloss.NewStyle().
+			Bold(true)
+
+	MentionStyle = lipgloss.NewStyle().
+			Foreground(aqua).
+			Bold(true)
+
+	EditedTag = lipgloss.NewStyle().
+			Foreground(fgF).
+			Italic(true)
+
+	// Status indicators
+	StatusOnline  = lipgloss.NewStyle().Foreground(grn)
+	StatusIdle    = lipgloss.NewStyle().Foreground(yel)
+	StatusOffline = lipgloss.NewStyle().Foreground(fgF)
+
+	// Voice
+	VoiceStatusStyle = lipgloss.NewStyle().
+				Background(lipgloss.Color("#1d2021")).
+				Foreground(aqua).
+				Padding(0, 1)
+
+	// Error/success
+	ErrorStyle = lipgloss.NewStyle().
+			Foreground(red).
+			Bold(true)
+
+	SuccessStyle = lipgloss.NewStyle().
+			Foreground(grn).
+			Bold(true)
+
+	// Help
+	HelpStyle = lipgloss.NewStyle().
+			Foreground(fgF).
+			Italic(true)
+
+	// Title
+	TitleStyle = lipgloss.NewStyle().
+			Foreground(aqua).
+			Bold(true).
+			Align(lipgloss.Center)
+)
+
+// UsernameColor returns a deterministic color for a username based on its content.
+func UsernameColor(username string) lipgloss.Color {
+	colors := []lipgloss.Color{red, grn, org, aqua, yel, lipgloss.Color("#d3869b"), lipgloss.Color("#83a598")}
+	hash := 0
+	for _, c := range username {
+		hash += int(c)
+	}
+	return colors[hash%len(colors)]
+}