chore: Improve build and UI elements

- Add OS-specific build logic to Makefile
- Use consistent icon constants in UI
- Remove unused humanTime function

Author: programmersd21

Makefile

@@ -1,12 +1,22 @@
-.PHONY: build test lint clean run fmt
+.PHONY: build test lint clean run fmt install
 
 BINARY_NAME=kairo
 
+ifeq ($(OS),Windows_NT)
+	EXE=.exe
+	RM=del /Q
+	RUN=.\$(BINARY_NAME)$(EXE)
+else
+	EXE=
+	RM=rm -f
+	RUN=./$(BINARY_NAME)
+endif
+
 fmt:
 	go fmt ./...
 
 build:
-	go build -trimpath -ldflags "-s -w" -o $(BINARY_NAME) ./cmd/kairo
+	go build -trimpath -ldflags "-s -w" -o $(BINARY_NAME)$(EXE) ./cmd/kairo
 
 test:
 	go test ./...
@@ -16,11 +26,10 @@ lint:
 
 clean:
 	go clean
-	rm -f $(BINARY_NAME)
-	rm -f $(BINARY_NAME).exe
+	$(RM) $(BINARY_NAME)$(EXE)
 
 run: build
-	./$(BINARY_NAME)
+	$(RUN)
 
 install:
 	go install ./cmd/kairo

internal/app/model.go

@@ -721,12 +721,12 @@ func (m *Model) renderFooter() string {
 		left = m.s.BadgeBad.Render(" UNINSTALL? ") + " " + m.s.Muted.Render("y/enter confirm • n/esc cancel")
 	default:
 		left = " " + m.s.Muted.Render(
-			fk(m.km.Palette)+" 󰘥  • "+
-				fk(m.km.NewTask)+" 󰈄  • "+
-				"g 󰑐  • "+
-				fk(m.km.DeleteTask)+" 󰅙  • "+
-				fk(m.km.Help)+" 󰋼  • "+
-				fk(m.km.ViewInbox)+"-"+fk(m.km.ViewPriority)+" 󰈈 ",
+			fk(m.km.Palette)+" "+styles.IconPalette+" • "+
+				fk(m.km.NewTask)+" "+styles.IconNew+" • "+
+				"g "+styles.IconSync+" • "+
+				fk(m.km.DeleteTask)+" "+styles.IconDelete+" • "+
+				fk(m.km.Help)+" "+styles.IconHelp+" • "+
+				fk(m.km.ViewInbox)+"-"+fk(m.km.ViewPriority)+" "+styles.IconView+" ",
 		)
 	}
 

internal/ui/detail/model.go

@@ -1,9 +1,7 @@
 package detail
 
 import (
-	"fmt"
 	"strings"
-	"time"
 
 	"github.com/charmbracelet/glamour"
 	"github.com/charmbracelet/lipgloss"
@@ -179,20 +177,3 @@ func (m *Model) renderMarkdown(src string) string {
 	m.mdCache = strings.TrimRight(out, "\n")
 	return m.mdCache
 }
-
-func humanTime(t time.Time, now time.Time) string {
-	d := now.Sub(t)
-	if d < 0 {
-		d = -d
-	}
-	switch {
-	case d < time.Minute:
-		return "just now"
-	case d < time.Hour:
-		return fmt.Sprintf("%dm ago", int(d.Minutes()))
-	case d < 24*time.Hour:
-		return fmt.Sprintf("%dh ago", int(d.Hours()))
-	default:
-		return fmt.Sprintf("%dd ago", int(d.Hours()/24))
-	}
-}

internal/ui/styles/styles.go

@@ -28,6 +28,11 @@ const (
 	IconHelp      = "? "
 	IconTask      = "❖ "
 	IconPlugin    = "🧩 "
+	// Additional safe icons for UI affordances
+	IconPalette = "🔎 "
+	IconNew     = "✚ "
+	IconDelete  = "🗑 "
+	IconView    = "▣ "
 )
 
 // Design System Constants