Bump Gradio to 6.15.2; add datasets floor

Upgrade dependencies via uv lock --upgrade (Gradio 6.14.0 -> 6.15.2,
transformers 5.8.1 -> 5.9.0) and sync README sdk_version to match.

Add a version floor datasets>=4.8.5 to the hf-spaces dependency group
so uv lock --upgrade cannot backtrack datasets to an old release and
cap shared transitive pins.

README.md

@@ -4,7 +4,7 @@ emoji: 😻
 colorFrom: indigo
 colorTo: pink
 sdk: gradio
-sdk_version: 6.14.0
+sdk_version: 6.15.2
 python_version: "3.12.12"
 app_file: app.py
 pinned: false

pyproject.toml

@@ -6,10 +6,10 @@ readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
     "accelerate>=1.13.0",
-    "gradio[mcp,oauth]>=6.14.0",
+    "gradio[mcp,oauth]>=6.15.2",
     "spaces>=0.50.2",
     "torch==2.11.0",
-    "transformers>=5.8.1",
+    "transformers>=5.9.0",
 ]
 
 [tool.ruff]
@@ -56,5 +56,5 @@ dev = [
     "ruff>=0.15.5",
 ]
 hf-spaces = [
-    "datasets",
+    "datasets>=4.8.5",
 ]

requirements.txt

@@ -25,7 +25,7 @@ authlib==1.7.2
     # via gradio
 brotli==1.2.0
     # via gradio
-certifi==2026.4.22
+certifi==2026.5.20
     # via
     #   httpcore
     #   httpx
@@ -34,8 +34,9 @@ cffi==2.0.0 ; platform_python_implementation != 'PyPy'
     # via cryptography
 charset-normalizer==3.4.7
     # via requests
-click==8.4.0
+click==8.4.1
     # via
+    #   huggingface-hub
     #   typer
     #   uvicorn
 colorama==0.4.6 ; sys_platform == 'win32'
@@ -47,13 +48,13 @@ cryptography==48.0.0
     #   authlib
     #   joserfc
     #   pyjwt
-cuda-bindings==13.2.0 ; sys_platform == 'linux'
+cuda-bindings==13.3.1 ; sys_platform == 'linux'
     # via torch
-cuda-pathfinder==1.5.4 ; sys_platform == 'linux'
+cuda-pathfinder==1.5.5 ; sys_platform == 'linux'
     # via cuda-bindings
 cuda-toolkit==13.0.2 ; sys_platform == 'linux'
     # via torch
-fastapi==0.136.1
+fastapi==0.136.3
     # via gradio
 filelock==3.29.0
     # via
@@ -64,7 +65,7 @@ fsspec==2026.2.0
     #   gradio-client
     #   huggingface-hub
     #   torch
-gradio==6.14.0
+gradio==6.15.2
     # via
     #   gemma-2-9b-it
     #   spaces
@@ -94,14 +95,14 @@ httpx==0.28.1
     #   spaces
 httpx-sse==0.4.3
     # via mcp
-huggingface-hub==1.15.0
+huggingface-hub==1.17.0
     # via
     #   accelerate
     #   gradio
     #   gradio-client
     #   tokenizers
     #   transformers
-idna==3.15
+idna==3.17
     # via
     #   anyio
     #   httpx
@@ -112,7 +113,7 @@ jinja2==3.1.6
     # via
     #   gradio
     #   torch
-joserfc==1.6.5
+joserfc==1.6.8
     # via authlib
 jsonschema==4.26.0
     # via mcp
@@ -124,7 +125,7 @@ markupsafe==3.0.3
     # via
     #   gradio
     #   jinja2
-mcp==1.27.1
+mcp==1.27.2
     # via gradio
 mdurl==0.1.2
     # via markdown-it-py
@@ -210,13 +211,13 @@ pydub==0.25.1
     # via gradio
 pygments==2.20.0
     # via rich
-pyjwt==2.12.1
+pyjwt==2.13.0
     # via mcp
 python-dateutil==2.9.0.post0
     # via pandas
 python-dotenv==1.2.2
     # via pydantic-settings
-python-multipart==0.0.29
+python-multipart==0.0.30
     # via
     #   gradio
     #   mcp
@@ -240,7 +241,7 @@ requests==2.34.2
     # via spaces
 rich==15.0.0
     # via typer
-rpds-py==0.30.0
+rpds-py==2026.5.1
     # via
     #   jsonschema
     #   referencing
@@ -260,7 +261,7 @@ six==1.17.0
     # via python-dateutil
 sse-starlette==3.4.4
     # via mcp
-starlette==1.0.0
+starlette==1.2.1
     # via
     #   fastapi
     #   gradio
@@ -280,7 +281,7 @@ tqdm==4.67.3
     # via
     #   huggingface-hub
     #   transformers
-transformers==5.8.1
+transformers==5.9.0
     # via gemma-2-9b-it
 triton==3.6.0 ; sys_platform == 'linux'
     # via torch
@@ -315,7 +316,7 @@ tzdata==2026.2 ; sys_platform == 'emscripten' or sys_platform == 'win32'
     # via pandas
 urllib3==2.7.0
     # via requests
-uvicorn==0.47.0
+uvicorn==0.48.0
     # via
     #   gradio
     #   mcp