feat: cat hide toggle and critical fixes (#272)

- Add 'k' key to hide/show cat in mo status
- Hand-crafted mirror frames for better left-walking animation
- Fix extra blank lines bug (strings.Lines → strings.Split)
- Fix battery power overflow (ParseInt for negative values)
- Optimize README Tips section (8 → 5 items)

cmd/status/main.go

@@ -34,11 +34,13 @@ type model struct {
 	lastUpdated time.Time
 	collecting  bool
 	animFrame   int
+	catHidden   bool // true = hidden, false = visible
 }
 
 func newModel() model {
 	return model{
 		collector: NewCollector(),
+		catHidden: false,
 	}
 }
 
@@ -52,6 +54,10 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		switch msg.String() {
 		case "q", "esc", "ctrl+c":
 			return m, tea.Quit
+		case "k":
+			// Toggle cat visibility
+			m.catHidden = !m.catHidden
+			return m, nil
 		}
 	case tea.WindowSizeMsg:
 		m.width = msg.Width
@@ -89,7 +95,7 @@ func (m model) View() string {
 		return "Loading..."
 	}
 
-	header := renderHeader(m.metrics, m.errMessage, m.animFrame, m.width)
+	header := renderHeader(m.metrics, m.errMessage, m.animFrame, m.width, m.catHidden)
 	cardWidth := 0
 	if m.width > 80 {
 		cardWidth = maxInt(24, m.width/2-4)
@@ -104,10 +110,20 @@ func (m model) View() string {
 			}
 			rendered = append(rendered, renderCard(c, cardWidth, 0))
 		}
-		return header + "\n" + lipgloss.JoinVertical(lipgloss.Left, rendered...)
+		result := header + "\n" + lipgloss.JoinVertical(lipgloss.Left, rendered...)
+		// Add extra newline if cat is hidden for better spacing
+		if m.catHidden {
+			result = header + "\n\n" + lipgloss.JoinVertical(lipgloss.Left, rendered...)
+		}
+		return result
 	}
 
-	return header + "\n" + renderTwoColumns(cards, m.width)
+	twoCol := renderTwoColumns(cards, m.width)
+	// Add extra newline if cat is hidden for better spacing
+	if m.catHidden {
+		return header + "\n\n" + twoCol
+	}
+	return header + "\n" + twoCol
 }
 
 func (m model) collectCmd() tea.Cmd {

cmd/status/metrics_battery.go

@@ -238,8 +238,9 @@ func collectThermal() ThermalStatus {
 				valStr, _, _ = strings.Cut(valStr, ",")
 				valStr, _, _ = strings.Cut(valStr, "}")
 				valStr = strings.TrimSpace(valStr)
-				if powerMW, err := strconv.ParseFloat(valStr, 64); err == nil {
-					thermal.BatteryPower = powerMW / 1000.0
+				// Parse as int64 first to handle negative values (charging)
+				if powerMW, err := strconv.ParseInt(valStr, 10, 64); err == nil {
+					thermal.BatteryPower = float64(powerMW) / 1000.0
 				}
 			}
 		}

cmd/status/view.go

@@ -32,7 +32,7 @@ const (
 	iconProcs   = "❊"
 )
 
-// Mole body frames.
+// Mole body frames (facing right).
 var moleBody = [][]string{
 	{
 		`     /\_/\`,
@@ -60,11 +60,36 @@ var moleBody = [][]string{
 	},
 }
 
+// Mirror mole body frames (facing left).
+var moleBodyMirror = [][]string{
+	{
+		`    /\_/\`,
+		`   / o o \___`,
+		`  \ =-=   ___\`,
+		`  (m-m-(____/`,
+	},
+	{
+		`    /\_/\`,
+		`   / o o \___`,
+		`  \ =-=   ___\`,
+		`  (__mm(____/`,
+	},
+	{
+		`    /\_/\`,
+		`   / · · \___`,
+		`  \ =-=   ___\`,
+		`  (m__m-(___/`,
+	},
+	{
+		`    /\_/\`,
+		`   / o o \___`,
+		`  \ =-=   ___\`,
+		`  (-mm-(____/`,
+	},
+}
+
 // getMoleFrame renders the animated mole.
 func getMoleFrame(animFrame int, termWidth int) string {
-	bodyIdx := animFrame % len(moleBody)
-	body := moleBody[bodyIdx]
-
 	moleWidth := 15
 	maxPos := max(termWidth-moleWidth, 0)
 
@@ -73,10 +98,22 @@ func getMoleFrame(animFrame int, termWidth int) string {
 		cycleLength = 1
 	}
 	pos := animFrame % cycleLength
-	if pos > maxPos {
+	movingLeft := pos > maxPos
+	if movingLeft {
 		pos = cycleLength - pos
 	}
 
+	// Use mirror frames when moving left
+	var frames [][]string
+	if movingLeft {
+		frames = moleBodyMirror
+	} else {
+		frames = moleBody
+	}
+
+	bodyIdx := animFrame % len(frames)
+	body := frames[bodyIdx]
+
 	padding := strings.Repeat(" ", pos)
 	var lines []string
 
@@ -93,7 +130,7 @@ type cardData struct {
 	lines []string
 }
 
-func renderHeader(m MetricsSnapshot, errMsg string, animFrame int, termWidth int) string {
+func renderHeader(m MetricsSnapshot, errMsg string, animFrame int, termWidth int, catHidden bool) string {
 	title := titleStyle.Render("Mole Status")
 
 	scoreStyle := getScoreStyle(m.HealthScore)
@@ -131,11 +168,21 @@ func renderHeader(m MetricsSnapshot, errMsg string, animFrame int, termWidth int
 
 	headerLine := title + "  " + scoreText + "  " + strings.Join(infoParts, " · ")
 
-	mole := getMoleFrame(animFrame, termWidth)
+	// Show cat unless hidden
+	var mole string
+	if !catHidden {
+		mole = getMoleFrame(animFrame, termWidth)
+	}
 
 	if errMsg != "" {
+		if mole == "" {
+			return lipgloss.JoinVertical(lipgloss.Left, headerLine, "", dangerStyle.Render("ERROR: "+errMsg), "")
+		}
 		return lipgloss.JoinVertical(lipgloss.Left, headerLine, "", mole, dangerStyle.Render("ERROR: "+errMsg), "")
 	}
+	if mole == "" {
+		return headerLine
+	}
 	return headerLine + "\n" + mole
 }
 
@@ -464,6 +511,7 @@ func renderBatteryCard(batts []BatteryStatus, thermal ThermalStatus) cardData {
 				statusText += fmt.Sprintf(" · %.0fW Adapter", thermal.AdapterPower)
 			}
 		} else if thermal.BatteryPower > 0 {
+			// Only show battery power when discharging (positive value)
 			statusText += fmt.Sprintf(" · %.0fW", thermal.BatteryPower)
 		}
 		lines = append(lines, statusStyle.Render(statusText+statusIcon))
@@ -518,10 +566,7 @@ func renderCard(data cardData, width int, height int) string {
 	header := titleStyle.Render(titleText) + "  " + lineStyle.Render(strings.Repeat("╌", lineLen))
 	content := header + "\n" + strings.Join(data.lines, "\n")
 
-	var lines []string
-	for line := range strings.Lines(content) {
-		lines = append(lines, line)
-	}
+	lines := strings.Split(content, "\n")
 	for len(lines) < height {
 		lines = append(lines, "")
 	}