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/voice.go

@@ -0,0 +1,46 @@
+package main
+
+// Voice state tracking for the TUI client.
+
+// VoiceState holds the current voice connection state.
+type VoiceState struct {
+	Connected  bool
+	RoomName   string
+	LiveKitURL string
+	Token      string
+	Muted      bool
+	Deafened   bool
+	Participants []VoiceParticipant
+}
+
+// VoiceParticipant is someone in the current voice channel.
+type VoiceParticipant struct {
+	UserID   string
+	Username string
+	State    string // connected, disconnected
+}
+
+// VoiceStatusText returns a human-readable status for the status bar.
+func (vs *VoiceState) StatusText() string {
+	if !vs.Connected {
+		return ""
+	}
+	muteIcon := "🔊"
+	if vs.Muted {
+		muteIcon = "🔇"
+	}
+	return muteIcon + " " + vs.RoomName
+}
+
+// ToggleMute flips the muted state.
+func (vs *VoiceState) ToggleMute() {
+	vs.Muted = !vs.Muted
+}
+
+// ToggleDeafen flips the deafened state.
+func (vs *VoiceState) ToggleDeafen() {
+	vs.Deafened = !vs.Deafened
+	if vs.Deafened {
+		vs.Muted = true
+	}
+}