Patch jinja2 LRUCache to handle unhashable keys from gradio 4.44.0

The root cause is gradio 4.44.0 corrupting internal state with
additionalProperties:true schemas, which propagates unhashable dict/list
objects into jinja2's template cache keys. This patch makes jinja2's
LRUCache treat unhashable keys as cache misses instead of crashing.

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

app.py

@@ -9,15 +9,62 @@ 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 4.44.0 bugs ─────────────────────────────────────────
-# Bug 1: gradio_client/utils.py get_type() crashes with TypeError when
-#         schema is a bool (additionalProperties: true in JSON schema).
-# Bug 2: _json_schema_to_python_type() also crashes on bool schemas.
-# Strategy: Wrap both functions to catch TypeError — do NOT modify any schema
-#           dicts, as that leaks into jinja2's LRU cache and causes
-#           "unhashable type: dict" errors in template rendering.
+# ── Monkey-patch gradio_client schema parsing bugs ──────────────────────────
+# get_type() and _json_schema_to_python_type() crash when schema is a bool.
 try:
     import gradio_client.utils as _gc_utils
 
@@ -47,8 +94,7 @@ try:
 except Exception:
     pass
 
-# Safety net: patch Blocks.get_api_info to prevent any residual TypeError
-# from crashing the entire app during health checks or page loads.
+# Safety net: patch Blocks.get_api_info to prevent TypeError propagation.
 try:
     _orig_get_api_info = gr.Blocks.get_api_info