chore(motion): tidy proto, imports and usecase guess; add weights licence

Remove a stray blank line in backend.proto and group the imports in
pkg/motion/validation.go. Decide the motion usecase guess from the
backend capability registry instead of a hardcoded backend name, so
variant builds of the backend resolve too. Declare the weights licence
in the gallery entry, as stated on the model card.

Assisted-by: Claude Code:claude-sonnet-5-5

backend/backend.proto

@@ -7,7 +7,6 @@ option java_outer_classname = "LocalAIBackend";
 
 package backend;
 
-
 service Backend {
   rpc Health(HealthMessage) returns (Reply) {}
   rpc Free(HealthMessage) returns (Result) {}

core/config/model_config.go

@@ -2359,8 +2359,11 @@ func (c *ModelConfig) GuessUsecases(u ModelConfigUsecase) bool {
 	if u&FLAG_UPSCALE != 0 {
 		return false
 	}
-	if u&FLAG_MOTION != 0 && c.Backend != "gemxcpp" {
-		return false
+	if u&FLAG_MOTION != 0 {
+		// Motion is declared by the backend registry, never inferred from templates.
+		if cap := GetBackendCapability(c.Backend); cap == nil || !slices.Contains(cap.PossibleUsecases, UsecaseMotion) {
+			return false
+		}
 	}
 	// Backends that are clearly not text-generation
 	nonTextGenBackends := []string{

gallery/index.yaml

@@ -73402,6 +73402,7 @@
   url: "github:mudler/LocalAI/gallery/virtual.yaml@master"
   urls:
     - https://huggingface.co/LocalAI-io/GEM-X-GGUF
+  license: nvidia-open-model-license
   description: |
     Live human motion capture with GEM-X on CPU/Vulkan. Streams SOMA-77 or
     SMPL-24 poses through /api/motion; no body mesh or SAM3D dependency.

pkg/motion/validation.go

@@ -3,8 +3,9 @@ package motion
 
 import (
 	"fmt"
-	motionpb "github.com/mudler/LocalAI/pkg/motion/proto"
 	"math"
+
+	motionpb "github.com/mudler/LocalAI/pkg/motion/proto"
 )
 
 // ValidateFrame bounds allocation and rejects invalid subject boxes before a