Pin Gradio and ignore local runtime files

Lock Gradio to the 6.29 release in both dependency manifests to keep installs consistent across environments, including Hugging Face Spaces. Also expand `.gitignore` for local virtualenv, tool caches, Gradio runtime data, downloaded prediction artifacts, and first-run DLC model downloads so generated files do not get committed.

.gitignore

@@ -2,3 +2,15 @@
 __pycache__/
 model/__pycache__/
 .vscode/settings.json
+
+# Local environment and tool caches
+.venv/
+.ruff_cache/
+
+# Written by the app at runtime
+.gradio/
+download_predictions.json
+dowload_predictions_dlc.json
+download_annotated.png
+# TF (legacy) models downloaded on first use; DLC_models/readme.md stays tracked
+DLC_models/*/

pyproject.toml

@@ -14,7 +14,7 @@ dependencies = [
   "deeplabcut-live",
   "dlclibrary",
   "gitpython>=3.1.30",
-  "gradio",
+  "gradio==6.29",
   "humanfriendly",
   "psutil",
   "ruamel-yaml==0.17.21",

requirements.txt

@@ -1,5 +1,5 @@
 # Hugging Face Spaces install from this file; keep in sync with pyproject.toml dependencies.
-gradio
+gradio==6.29.0
 gitpython>=3.1.30
 seaborn
 deeplabcut[modelzoo,tf]==3.0.2