Add multi-panel Pico UDP firmware and Python LED control.

Pico panels get static IPs on 10.1.1.10–14 with per-panel LED counts, Makefile deploy targets, and Python examples for animations, sync tests, and direct Pi SPI control.

Co-authored-by: Cursor <cursoragent@cursor.com>

leds/colors.py

@@ -0,0 +1,68 @@
+"""Color helpers for LED animations."""
+
+from __future__ import annotations
+
+import math
+from typing import Tuple
+
+RGB = Tuple[int, int, int]
+
+
+def wheel(pos: int) -> RGB:
+    pos = pos % 256
+    if pos < 85:
+        return (255 - pos * 3, pos * 3, 0)
+    if pos < 170:
+        pos -= 85
+        return (0, 255 - pos * 3, pos * 3)
+    pos -= 170
+    return (pos * 3, 0, 255 - pos * 3)
+
+
+def heat_color(temperature: float) -> RGB:
+    """Map 0.0–1.0 heat to black → red → yellow → white."""
+    t = max(0.0, min(1.0, temperature))
+    if t < 0.25:
+        return (int(t * 4 * 255), 0, 0)
+    if t < 0.5:
+        return (255, int((t - 0.25) * 4 * 255), 0)
+    if t < 0.75:
+        return (255, 255, int((t - 0.5) * 4 * 255))
+    return (255, 255, 255)
+
+
+def hsv_to_rgb(h: float, s: float, v: float) -> RGB:
+    h = h % 1.0
+    i = int(h * 6)
+    f = h * 6 - i
+    p = int(v * (1 - s) * 255)
+    q = int(v * (1 - f * s) * 255)
+    t = int(v * (1 - (1 - f) * s) * 255)
+    v255 = int(v * 255)
+    match i % 6:
+        case 0:
+            return (v255, t, p)
+        case 1:
+            return (q, v255, p)
+        case 2:
+            return (p, v255, t)
+        case 3:
+            return (p, q, v255)
+        case 4:
+            return (t, p, v255)
+        case _:
+            return (v255, p, q)
+
+
+def dim(color: RGB, scale: float) -> RGB:
+    scale = max(0.0, min(1.0, scale))
+    return (int(color[0] * scale), int(color[1] * scale), int(color[2] * scale))
+
+
+def blend(a: RGB, b: RGB, t: float) -> RGB:
+    t = max(0.0, min(1.0, t))
+    return (
+        int(a[0] + (b[0] - a[0]) * t),
+        int(a[1] + (b[1] - a[1]) * t),
+        int(a[2] + (b[2] - a[2]) * t),
+    )