Add portal web simulator, SPI bridges, and Pico firmware updates.

Bring the five-panel hex portal online with a browser 3D/schematic preview, Pi SPI backends, and renamed multi-panel Pico UDP firmware.

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

leds/matrix.py

@@ -61,6 +61,10 @@ class LedMatrix:
                 brightness=config0.brightness,
                 spi_bus=config0.spi_bus,
                 spi_device=config0.spi_device,
+                spi_max_speed_hz=config0.spi_max_speed_hz,
+                wire_order=config0.wire_order,
+                passthrough=config0.passthrough,
+                swap_rg=config0.swap_rg,
             )
         else:
             total_rows = sum(rows_per_strip)
@@ -148,6 +152,12 @@ class LedMatrix:
             assert self._strips is not None
             self._strips.show()
 
+    def show_rgb_bytes(self, rgb: bytes) -> None:
+        """Push a linear RGB frame (row-major) straight to the strip."""
+        if self._strip is None:
+            raise RuntimeError("show_rgb_bytes requires a single-strip matrix")
+        self._strip.show_rgb_bytes(rgb)
+
     def clear(self) -> None:
         if self._strip is not None:
             self._strip.clear()