Improve model card: Add paper, project, code links, pipeline tag, and library name

This PR significantly improves the model card for `FLUX.1-Layout-ControlNet` by:

* Adding `pipeline_tag: image-to-3d` to the metadata, aligning with the model's role in the overarching "SpatialGen: Layout-guided 3D Indoor Scene Generation" project and improving discoverability.
* Adding `library_name: diffusers` to the metadata, enabling the automated "How to use" widget, based on the provided code snippet.
* Updating the introductory text to clearly associate `FLUX.1-Layout-ControlNet` with the SpatialGen project.
* Including direct links to the research paper ([SPATIALGEN: Layout-guided 3D Indoor Scene Generation](https://huggingface.co/papers/2509.14981)), the project page (https://manycore-research.github.io/SpatialGen), and the GitHub repository (https://github.com/manycore-research/SpatialGen) for comprehensive access to project information and code.

The existing showcase and `diffusers` usage examples have been retained.

Please review and merge this PR if everything looks good.

README.md

@@ -1,19 +1,26 @@
 ---
-license: other
-license_name: flux-1-dev-non-commercial-license
-license_link: >-
-  https://github.com/black-forest-labs/flux/blob/main/model_licenses/LICENSE-FLUX1-dev
 base_model:
 - black-forest-labs/FLUX.1-dev
+license: other
+license_name: flux-1-dev-non-commercial-license
+license_link: https://github.com/black-forest-labs/flux/blob/main/model_licenses/LICENSE-FLUX1-dev
 tags:
 - image-generation
 - flux
 - controlnet
+pipeline_tag: image-to-3d
+library_name: diffusers
 ---
 
-## FLUX.1-Layout-ControlNet
+# FLUX.1-Layout-ControlNet for SpatialGen
+
+This model, `FLUX.1-Layout-ControlNet`, is a key component of the **SpatialGen: Layout-guided 3D Indoor Scene Generation** project, presented in the paper [SPATIALGEN: Layout-guided 3D Indoor Scene Generation](https://huggingface.co/papers/2509.14981).
+
+`FLUX.1 Layout Controlnet [dev]` is a ControlNet conditioned by a semantic image. It is capable of generating a 2D image based on a text description while following the semantic image layout. This ControlNet is applicable to [FLUX.1 [dev]](https://huggingface.co/black-forest-labs/FLUX.1-dev) and is leveraged within the SpatialGen framework for 3D scene synthesis.
 
-`FLUX.1 Layout Controlnet [dev]` is a ControlNet conditioned by a semantic image. The ControlNet is capable of generating an image based on a text description while following the semantic image. The Controlnet is applicable to [FLUX.1 [dev]](https://huggingface.co/black-forest-labs/FLUX.1-dev).
+*   📖 [Paper: SPATIALGEN: Layout-guided 3D Indoor Scene Generation](https://huggingface.co/papers/2509.14981)
+*   🌐 [Project Page](https://manycore-research.github.io/SpatialGen)
+*   💻 [Code Repository](https://github.com/manycore-research/SpatialGen)
 
 ## Showcase
 
@@ -94,4 +101,4 @@ image.save("output.png")
 
 ## LICENSE
 
-FLUX.1-Layout-ControlNet is licensed under the [FLUX.1-dev Non-Commercial License](https://github.com/black-forest-labs/flux/blob/main/model_licenses/LICENSE-FLUX1-dev).
+FLUX.1-Layout-ControlNet is licensed under the [FLUX.1-dev Non-Commercial License](https://github.com/black-forest-labs/flux/blob/main/model_licenses/LICENSE-FLUX1-dev).