Pre-download CLAP model at startup to fix daemonic process error in ZeroGPU

ClapTextModelWithProjection.from_pretrained() internally spawns a child
process for safe-tensor conversion, which fails inside ZeroGPU's daemonic
worker. Pre-downloading laion/larger_clap_general via snapshot_download()
at module level ensures weights are cached before GPU function runs.

app.py

@@ -21,7 +21,7 @@ import soundfile as sf
 import ffmpeg
 import spaces
 import gradio as gr
-from huggingface_hub import hf_hub_download
+from huggingface_hub import hf_hub_download, snapshot_download
 
 # ================================================================== #
 #                     CHECKPOINT CONFIGURATION                        #
@@ -62,6 +62,12 @@ hf_hub_download(repo_id=CKPT_REPO_ID, filename="HunyuanVideo-Foley/vae_128d_48k.
 hf_hub_download(repo_id=CKPT_REPO_ID, filename="HunyuanVideo-Foley/synchformer_state_dict.pth",  cache_dir=CACHE_DIR, local_dir=str(HUNYUAN_MODEL_DIR), local_dir_use_symlinks=False)
 print("HunyuanVideoFoley checkpoints downloaded.")
 
+# Pre-download CLAP model so from_pretrained() reads local cache inside the
+# ZeroGPU daemonic worker (spawning child processes there is not allowed).
+print("Pre-downloading CLAP model (laion/larger_clap_general)…")
+snapshot_download(repo_id="laion/larger_clap_general")
+print("CLAP model pre-downloaded.")
+
 # ================================================================== #
 #                     SHARED CONSTANTS / HELPERS                      #
 # ================================================================== #