Replace Unicode icons with PNG icons in StatusBar

- Move icons/ to internal/ui/icons/ for go:embed
- Renderer.loadIcons() loads PNGs from embedded filesystem
- drawStatusBar() uses drawPng() for cut/copy/paste/search/conflict icons
- Icons are 16dp, rendered from 48x48 PNGs (2x density)

internal/ui/render.go

@@ -1,8 +1,12 @@
 package ui
 
 import (
+	"bytes"
+	"embed"
 	"image"
 	"image/color"
+	_ "image/png"
+	"strings"
 
 	"gioui.org/f32"
 	"gioui.org/layout"
@@ -15,6 +19,9 @@ import (
 	"golang.org/x/image/math/fixed"
 )
 
+//go:embed icons/*.png
+var iconFS embed.FS
+
 // StateReader provides access to scale and window dimensions from State.
 // Implemented by editor.State to avoid import cycles.
 type StateReader interface {
@@ -28,11 +35,31 @@ type Renderer struct {
 	theme Theme
 	shp   *text.Shaper
 	state StateReader // read-only access to State for scale/window size
+	icons map[string]image.Image // loaded PNG icons
 }
 
 // New creates a new Renderer.
 func New(th Theme, shp *text.Shaper) *Renderer {
-	return &Renderer{theme: th, shp: shp}
+	r := &Renderer{theme: th, shp: shp, icons: make(map[string]image.Image)}
+	r.loadIcons()
+	return r
+}
+
+// loadIcons loads all PNG icons from the embedded filesystem.
+func (r *Renderer) loadIcons() {
+	files := []string{"cut.png", "copy.png", "paste.png", "search.png", "conflict.png", "wrapOn.png", "wrapOff.png"}
+	for _, filename := range files {
+		data, err := iconFS.ReadFile(filename)
+		if err != nil {
+			continue // skip missing icons
+		}
+		img, _, err := image.Decode(bytes.NewReader(data))
+		if err != nil {
+			continue
+		}
+		name := strings.TrimSuffix(filename, ".png")
+		r.icons[name] = img
+	}
 }
 
 // SetState sets the State reference for the Renderer.
@@ -167,22 +194,23 @@ func (r *Renderer) drawStatusBar(gtx layout.Context, sb StatusBar, _ WindowConst
 	// Left side: Cut, Copy, Paste icons (always visible)
 	leftX := reg.X + Dp(8)
 	iconY := iconsLineY
+	iconSize := Dp(16) // 16dp icons
 
-	r.drawText(gtx, th.Shaper, "✂", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	r.drawPng(gtx, r.icons["cut"], leftX, iconY, iconSize, iconSize, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
-	leftX += Dp(36)
+	leftX += Dp(28)
-	r.drawText(gtx, th.Shaper, "⎘", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	r.drawPng(gtx, r.icons["copy"], leftX, iconY, iconSize, iconSize, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
-	leftX += Dp(36)
+	leftX += Dp(28)
-	r.drawText(gtx, th.Shaper, "⎘", r.theme.FontSize, leftX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	r.drawPng(gtx, r.icons["paste"], leftX, iconY, iconSize, iconSize, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 	leftX += Dp(12)
 
 	// Right side: Conflict (conditional), Search (always visible)
 	rightX := reg.X + reg.W - Dp(8)
 	if sb.ConflictIcon {
-		rightX -= Dp(36)
+		rightX -= Dp(28)
-		r.drawText(gtx, th.Shaper, "⚠", r.theme.FontSize, rightX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+		r.drawPng(gtx, r.icons["conflict"], rightX, iconY, iconSize, iconSize, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 	}
-	rightX -= Dp(36)
+	rightX -= Dp(28)
-	r.drawText(gtx, th.Shaper, "🔍", r.theme.FontSize, rightX, iconY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	r.drawPng(gtx, r.icons["search"], rightX, iconY, iconSize, iconSize, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 
 	c.Pop()
 }