Add help screen, connection indicators, README and release builds (M7)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/ui/app.go

@@ -34,8 +34,21 @@ type App struct {
 
 	message  string
 	overlays []overlay // dialogs and full-screen views stacked above the pages
+
+	services *tview.TextView
+	state    map[string]serviceState // keyed by service name
 }
 
+// serviceState is the last known connection state of a backend service.
+type serviceState struct {
+	known   bool
+	version string
+	err     error
+}
+
+// serviceNames fixes the order of the connection indicators.
+var serviceNames = []string{"Radarr", "Sonarr", "SABnzbd"}
+
 // overlay is a page stacked above the main views; focus is restored on close.
 type overlay struct {
 	page  string
@@ -49,6 +62,9 @@ func New(cfg *config.Config) *App {
 		tabs:   tview.NewTextView().SetDynamicColors(true),
 		pages:  tview.NewPages(),
 		status: tview.NewTextView().SetDynamicColors(true),
+
+		services: tview.NewTextView().SetDynamicColors(true).SetTextAlign(tview.AlignRight),
+		state:    map[string]serviceState{},
 	}
 
 	radarrClient := radarr.NewClient(cfg.Radarr.URL, cfg.Radarr.APIKey)
@@ -70,7 +86,9 @@ func New(cfg *config.Config) *App {
 	}
 
 	layout := tview.NewFlex().SetDirection(tview.FlexRow).
-		AddItem(a.tabs, 1, 0, false).
+		AddItem(tview.NewFlex().
+			AddItem(a.tabs, 0, 1, false).
+			AddItem(a.services, 34, 0, false), 1, 0, false).
 		AddItem(a.pages, 0, 1, true).
 		AddItem(a.status, 1, 0, false)
 
@@ -78,9 +96,56 @@ func New(cfg *config.Config) *App {
 	a.app.SetInputCapture(a.handleKey)
 	a.switchTo(0)
 	a.renderStatus()
+	a.renderServices()
 	return a
 }
 
+// SetService records the outcome of a request to a service and updates the
+// connection indicators. UI goroutine only. A nil err means reachable.
+func (a *App) SetService(name, version string, err error) {
+	prev := a.state[name]
+	if err == nil && version == "" {
+		version = prev.version
+	}
+	a.state[name] = serviceState{known: true, version: version, err: err}
+	a.renderServices()
+}
+
+func (a *App) renderServices() {
+	var s string
+	for _, n := range serviceNames {
+		st := a.state[n]
+		switch {
+		case !st.known:
+			s += "[gray]○ " + n + "[-]  "
+		case st.err != nil:
+			s += "[red]● " + n + "[-]  "
+		default:
+			s += "[green]●[-] " + n + "  "
+		}
+	}
+	a.services.SetText(s)
+}
+
+// serviceSummary describes every service for the help screen.
+func (a *App) serviceSummary() string {
+	var b strings.Builder
+	for _, n := range serviceNames {
+		st := a.state[n]
+		switch {
+		case !st.known:
+			fmt.Fprintf(&b, "[gray]○ %s: not contacted yet[-]\n", n)
+		case st.err != nil:
+			fmt.Fprintf(&b, "[red]● %s: %s[-]\n", n, tview.Escape(st.err.Error()))
+		case st.version != "":
+			fmt.Fprintf(&b, "[green]●[-] %s %s: connected\n", n, tview.Escape(st.version))
+		default:
+			fmt.Fprintf(&b, "[green]●[-] %s: connected\n", n)
+		}
+	}
+	return b.String()
+}
+
 // SetMessage shows a message in the status bar. UI goroutine only; use
 // post from other goroutines.
 func (a *App) SetMessage(text string) {
@@ -99,7 +164,7 @@ func (a *App) Run() error {
 }
 
 func (a *App) renderStatus() {
-	hints := "[gray]q quit · Tab/1-4/F1-F4 views · / search"
+	hints := "[gray]?/F9 help · q quit · Tab/F1-F4 views · / search"
 	if len(a.overlays) > 0 {
 		hints = "[gray]Esc back · Ctrl+C quit"
 	}
@@ -180,8 +245,12 @@ func (a *App) handleKey(ev *tcell.EventKey) *tcell.EventKey {
 		a.app.Stop()
 		return nil
 	}
-	// View switching that also works while typing in a search box. Not while a dialog is open.
+	// Shortcuts that also work while typing in a search box. Not while a dialog is open.
 	if len(a.overlays) == 0 {
+		if ev.Key() == tcell.KeyF9 {
+			a.showHelp()
+			return nil
+		}
 		if i := a.viewShortcut(ev); i >= 0 && i < len(a.views) {
 			a.switchTo(i)
 			return nil