Add Tkinter label designer with emoji picker

label_app.py: label size presets, multi-line text with auto-fit / bold /
alignment, tabbed emoji picker (rendered via Noto Color Emoji,
gamma-darkened and dithered for the thermal head), live 1-bit preview,
save PNG, print in a background thread. Settings persist in
~/.config/niimprint-label/.

main.py is the earlier minimal GUI it supersedes.

main.py

@@ -0,0 +1,66 @@
+import tkinter as tk
+
+from PIL import Image, ImageDraw, ImageFont
+
+from niimprint import BluetoothTransport, PrinterClient, prepare_print
+
+
+class LabelMaker:
+    def __init__(self, root, model):
+        self.root = root
+        self.root.title("Label Maker")
+        self.model = model
+        self.transport = BluetoothTransport("94:11:02:66:16:4D")
+        self.printer = PrinterClient(self.transport)
+        self.label_text = tk.StringVar()
+        self.label_text.set("Type your label here")
+        self.create_widgets()
+
+    def print(self, density, rotate, image):
+        image, density = prepare_print(self.model, Image.open(image), density, rotate)
+        self.printer.print_image(image, density=density, model=self.model)
+
+    def create_widgets(self):
+        # Text Entry
+        label_entry = tk.Entry(self.root, textvariable=self.label_text, width=40)
+        label_entry.pack(pady=10)
+
+        # Button to create label
+        create_button = tk.Button(
+            self.root, text="Create Label", command=self.create_label
+        )
+        create_button.pack(pady=10)
+
+    def create_label(self):
+        label_text = self.label_text.get()
+
+        # Create image
+        image = Image.new("RGB", (319, 95), "white")
+        draw = ImageDraw.Draw(image)
+
+        # Set font (change the font path according to your system)
+        font_path = "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf"
+        font_size = 20
+        font = ImageFont.truetype(font_path, font_size)
+
+        # Calculate text position
+        box = font.getbbox(label_text)
+        # getbbox returns (left, top, right, bottom)
+        font_width = box[2] - box[0]
+        font_height = box[3] - box[1]
+        x = (image.width - font_width) // 2
+        y = (image.height - font_height) // 2
+
+        # Draw text on image
+        draw.text((x - box[0], y - box[1]), label_text, font=font, fill="black")
+
+        # Save image or send it to the printer
+        image.save("label.png")
+        self.print(1, 90, "label.png")
+        print("Label created and saved as label.png")
+
+
+if __name__ == "__main__":
+    root = tk.Tk()
+    label_maker = LabelMaker(root, "d110")
+    root.mainloop()