Show application logo in custom title bar

app/gui/ui.py

@@ -352,6 +352,23 @@ class UIBuilderMixin:
         title_bar.pack(fill=tk.X, side=tk.TOP)
         title_bar.pack_propagate(False)
 
+        logo = None
+        try:
+            from PIL import Image, ImageTk  # type: ignore
+
+            logo_path = Path(__file__).resolve().parents[1] / "logo.png"
+            if logo_path.exists():
+                image = Image.open(logo_path).convert("RGBA")
+                image.thumbnail((26, 26))
+                logo = ImageTk.PhotoImage(image)
+        except Exception:
+            logo = None
+
+        if logo is not None:
+            logo_label = tk.Label(title_bar, image=logo, bg=bar_bg)
+            logo_label.image = logo  # keep reference
+            logo_label.pack(side=tk.LEFT, padx=(10, 6), pady=4)
+
         title_label = tk.Label(
             title_bar,
             text="ICRS — Interactive Color Range Analyzer",
@@ -360,7 +377,7 @@ class UIBuilderMixin:
             font=("Segoe UI", 11, "bold"),
             anchor="w",
         )
-        title_label.pack(side=tk.LEFT, padx=12)
+        title_label.pack(side=tk.LEFT, padx=6)
 
         close_btn = tk.Button(
             title_bar,