Add popup notifications, log view (F5) and context-sensitive key hints (M9)

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

internal/ui/logs.go

@@ -0,0 +1,61 @@
+package ui
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+const maxLogLines = 1000
+
+// logView keeps the history of everything that was reported as a popup.
+type logView struct {
+	root   *tview.TextView
+	app    *App
+	follow bool
+}
+
+func newLogView(app *App) *logView {
+	v := &logView{app: app, follow: true}
+	v.root = tview.NewTextView().SetDynamicColors(true).SetScrollable(true).SetMaxLines(maxLogLines)
+	v.root.SetBorder(true).SetTitle(" Log ")
+	v.root.SetInputCapture(func(ev *tcell.EventKey) *tcell.EventKey {
+		switch ev.Key() {
+		case tcell.KeyUp, tcell.KeyPgUp, tcell.KeyHome:
+			v.follow = false
+		case tcell.KeyEnd:
+			v.follow = true
+		case tcell.KeyRune:
+			switch ev.Rune() {
+			case 'c':
+				v.root.Clear()
+				return nil
+			case 'k':
+				v.follow = false
+			case 'G':
+				v.follow = true
+				v.root.ScrollToEnd()
+				return nil
+			}
+		}
+		return ev
+	})
+	return v
+}
+
+// add appends an entry.
+func (v *logView) add(l level, text string) {
+	color := map[level]string{levelInfo: "white", levelSuccess: "green", levelWarn: "yellow", levelError: "red"}[l]
+	fmt.Fprintf(v.root, "[gray]%s[-] [%s]%-5s[-] %s\n", time.Now().Format("15:04:05"), color, l, tview.Escape(text))
+	if v.follow {
+		v.root.ScrollToEnd()
+	}
+}
+
+func (v *logView) onShow() {
+	if v.follow {
+		v.root.ScrollToEnd()
+	}
+}