ui: highlight started tasks with yellow background in ultra mode

Add UltraStartedBG (amber 220) to Theme and apply it as the card
background when a task has a non-empty Start field. Selection highlight
still takes priority when the cursor is on the same card.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2 files changed, 29 insertions, 18 deletions

diff --git a/internal/ui/theme.go b/internal/ui/theme.go
index ad02a83..b7b3490 100644
--- a/internal/ui/theme.go
+++ b/internal/ui/theme.go
@@ -7,20 +7,21 @@ import (
 
 // Theme holds color configuration for the UI.
 type Theme struct {
-	HeaderFG   string
-	SelectedFG string
-	SelectedBG string
-	RowFG      string
-	RowBG      string
-	StatusFG   string
-	StatusBG   string
-	StartBG    string
-	OverdueBG  string
-	PrioLowBG  string
-	PrioMedBG  string
-	PrioHighBG string
-	SearchFG   string
-	SearchBG   string
+	HeaderFG      string
+	SelectedFG    string
+	SelectedBG    string
+	RowFG         string
+	RowBG         string
+	StatusFG      string
+	StatusBG      string
+	StartBG       string
+	UltraStartedBG string // background for started tasks in ultra mode
+	OverdueBG     string
+	PrioLowBG     string
+	PrioMedBG     string
+	PrioHighBG    string
+	SearchFG      string
+	SearchBG      string
 }
 
 // DefaultTheme returns the color theme used by Task Samurai.
@@ -33,7 +34,8 @@ func DefaultTheme() Theme {
 		RowBG:      "57",
 		StatusFG:   "229", // light yellow
 		StatusBG:   "57",  // dark purple — status bar background
-		StartBG:    "6",
+		StartBG:        "6",
+		UltraStartedBG: "220", // amber yellow — visually distinct "in progress" indicator
 		OverdueBG:  "1",
 		PrioLowBG:  "28",  // dark green — subtler than bright 10
 		PrioMedBG:  "33",  // medium blue — subtler than bright 12
@@ -49,7 +51,8 @@ func RandomTheme() Theme {
 		SelectedBG: randColor(),
 		RowBG:      randColor(),
 		StatusBG:   randColor(),
-		StartBG:    randColor(),
+		StartBG:        randColor(),
+		UltraStartedBG: randColor(),
 		OverdueBG:  randColor(),
 		PrioLowBG:  randColor(),
 		PrioMedBG:  randColor(),
diff --git a/internal/ui/ultra.go b/internal/ui/ultra.go
index fc28bc5..8419e78 100644
--- a/internal/ui/ultra.go
+++ b/internal/ui/ultra.go
@@ -650,7 +650,8 @@ func (m *Model) renderUltraCard(t task.Task, width int, selected bool, re *regex
 		lines[0] = "! " + lines[0]
 		card = strings.Join(lines, "\n")
 	}
-	return ultraCardStyle(m.theme, width, selected, blink).Render(card)
+	started := t.Start != ""
+	return ultraCardStyle(m.theme, width, selected, started, blink).Render(card)
 }
 
 // renderUltraHeader renders the task's primary state line (no selection bg).
@@ -855,9 +856,16 @@ func (m *Model) ultraKeyValue(re *regexp.Regexp, label, value, bg string) string
 	return m.ultraStyledText(re, labelStyle, label+":", bg) + space + m.ultraStyledText(re, valueStyle, value, bg)
 }
 
-func ultraCardStyle(theme Theme, width int, selected, blink bool) lipgloss.Style {
+func ultraCardStyle(theme Theme, width int, selected, started, blink bool) lipgloss.Style {
 	style := lipgloss.NewStyle().Width(width)
+	if started {
+		// Amber yellow background marks in-progress tasks; selection overrides it
+		// when the cursor is also on this card.
+		fg := contrastColor(theme.UltraStartedBG)
+		style = style.Foreground(lipgloss.Color(fg)).Background(lipgloss.Color(theme.UltraStartedBG))
+	}
 	if selected {
+		// Selection highlight takes priority over the started colour.
 		style = style.Foreground(lipgloss.Color(theme.SelectedFG)).Background(lipgloss.Color(theme.SelectedBG))
 	}
 	if blink {