fix(render): V2 panel ribbon-at-bottom mounting compensation

DeviceModel gains physicalRotationDegrees() — extra rotation applied
after the orientation-fit step, compensating for the panel's physical
mounting vs its scan-zero corner. V2 (13.3" Spectra-6) is mounted with
the ribbon at the bottom of a portrait photo (opposite scan-zero), so
needs 180°. V1 → 0.

Existing rendered .bin files will need a re-render to take effect —
run 'app:rerender-assets' on prod after deploy.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/Enum/DeviceModel.php

@@ -39,6 +39,25 @@ enum DeviceModel: string
         };
     }
 
+    /**
+     * Extra rotation in degrees applied AFTER the orientation-fit rotation,
+     * compensating for how the panel is physically mounted in its frame
+     * relative to the panel's scan-zero corner.
+     *
+     * V2 (13.3" Spectra-6): mounted with the ribbon at the bottom of a
+     * portrait photo (chosen physical mounting), opposite the panel's
+     * scan-zero corner. Needs a 180° flip so images render right-side-up.
+     *
+     * V1: no compensation — physical mount matches scan-zero.
+     */
+    public function physicalRotationDegrees(): int
+    {
+        return match ($this) {
+            self::V1 => 0,
+            self::V2 => 180,
+        };
+    }
+
     /** User-facing width (pre-rotation) for the given orientation. */
     public function width(Orientation $orientation): int
     {

src/MessageHandler/RenderImageMessageHandler.php

@@ -148,6 +148,14 @@ final class RenderImageMessageHandler
             $imagick->rotateImage(new \ImagickPixel('white'), -90);
         }
 
+        // Compensate for how the panel is physically mounted in its frame
+        // relative to its scan-zero corner. V2 ships ribbon-at-bottom of
+        // portrait, opposite scan-zero → needs 180° flip. V1 → 0.
+        $physRot = $model->physicalRotationDegrees();
+        if ($physRot !== 0) {
+            $imagick->rotateImage(new \ImagickPixel('white'), $physRot);
+        }
+
         // Build a strip of 6 palette pixels for remapImage
         $palImagick = new \Imagick();
         foreach (self::PALETTE as $rgb) {