Pin starlette<0.38.0 to fix TemplateResponse API incompatibility

The root cause of the jinja2 crashes was a starlette version mismatch:
newer starlette changed TemplateResponse(name, context) signature to
TemplateResponse(request, name, context), causing the context dict to
be passed as the template name. Pinning starlette fixes this.
Also removed the now-unnecessary jinja2 LRU cache patch.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.py

@@ -9,58 +9,6 @@ import logging
 import tempfile
 import shutil
 
-# ── Patch jinja2 LRU cache BEFORE importing gradio ──────────────────────────
-# Gradio 4.44.0 has a bug where component JSON schemas with
-# `additionalProperties: true` (a bool) corrupt gradio's internal state,
-# causing jinja2's LRU cache to receive unhashable keys (dicts/lists).
-# We patch jinja2's LRUCache to treat unhashable keys as cache misses
-# instead of crashing the entire app.
-try:
-    import jinja2.utils as _j2utils
-
-    _OrigLRUCache = _j2utils.LRUCache
-
-    class _SafeLRUCache(_OrigLRUCache):
-        def __getitem__(self, key):
-            try:
-                return super().__getitem__(key)
-            except TypeError:
-                raise KeyError(key)
-
-        def get(self, key, default=None):
-            try:
-                return super().get(key, default)
-            except TypeError:
-                return default
-
-        def __setitem__(self, key, value):
-            try:
-                super().__setitem__(key, value)
-            except TypeError:
-                pass  # Skip caching for unhashable keys
-
-        def __contains__(self, key):
-            try:
-                return super().__contains__(key)
-            except TypeError:
-                return False
-
-    _j2utils.LRUCache = _SafeLRUCache
-
-    # Also patch any already-created Environment caches
-    import jinja2.environment
-    _OrigEnvInit = jinja2.environment.Environment.__init__
-
-    def _patched_env_init(self, *args, **kwargs):
-        _OrigEnvInit(self, *args, **kwargs)
-        if isinstance(self.cache, _OrigLRUCache) and not isinstance(self.cache, _SafeLRUCache):
-            old_cap = self.cache.capacity
-            self.cache = _SafeLRUCache(old_cap)
-
-    jinja2.environment.Environment.__init__ = _patched_env_init
-except Exception:
-    pass
-
 import gradio as gr
 
 # ── Monkey-patch gradio_client schema parsing bugs ──────────────────────────

requirements.txt

@@ -1,5 +1,6 @@
 # Gradio + HuggingFace
 gradio==4.44.0
+starlette<0.38.0
 spaces
 huggingface_hub>=0.23.0