Fix spurious "Too many arguments provided for the endpoint" warnings

Root-caused via the actual gradio 5.25.0 source (matching the deployed
version exactly): Blocks.get_api_info() never populates the
unnamed_endpoints dict (confirmed still true in 5.50.0 and 6.20.0 too
— named_endpoints gets every dependency, unnamed_endpoints is just
never written to). But the JS client dispatches every internal
click/change/upload event by numeric fn_index and looks it up
specifically in unnamed_endpoints, so endpoint_info is always
undefined for these, parameters falls back to [], and any non-empty
data array trips a false-positive "too many arguments" warning. This
never actually broke anything (map_data_to_params just falls back to
the raw args on the empty-parameters path), but it fired on every
video upload and every Generate click in both live repro sessions.

Fix: monkeypatch get_api_info to mirror each already-computed
named_endpoints entry into unnamed_endpoints under its numeric
fn_index, since every dependency already gets an auto-generated
api_name regardless. Verified against the real gradio==5.25.0 package
in an isolated venv, including the duplicate-fn-registration pattern
this app uses (_on_video_upload_taro registered 3x) — every fn_index
resolves to its own correctly-sized parameter list post-patch.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app.py

@@ -56,6 +56,35 @@ def _patched_convert_video_to_playable_mp4(video_path: str) -> str:
 
 _gr_processing_utils.convert_video_to_playable_mp4 = _patched_convert_video_to_playable_mp4
 
+# ------------------------------------------------------------------ #
+# Gradio 5.x/6.x's Blocks.get_api_info() always returns an empty      #
+# unnamed_endpoints dict (confirmed still true through 5.50.0 and     #
+# 6.20.0 — it's simply never populated). But the JS client dispatches #
+# every internal (non-api_name) click/change/upload event by numeric  #
+# fn_index, and looks that fn_index up in exactly that always-empty   #
+# dict, so endpoint_info resolves to undefined and every such event   #
+# logs a harmless "Too many arguments provided for the endpoint."     #
+# console warning (it doesn't drop data or block the request — see    #
+# gradio's client/src/helpers/api_info.ts map_data_to_params, which   #
+# just falls back to the raw args array). Since every dependency      #
+# already gets an auto-generated api_name and a fully-computed entry  #
+# in named_endpoints regardless, just mirror each of those into       #
+# unnamed_endpoints keyed by its numeric fn_index so the JS client's  #
+# lookup actually finds it.                                           #
+_orig_get_api_info = gr.Blocks.get_api_info
+
+def _patched_get_api_info(self, all_endpoints: bool = False):
+    api_info = _orig_get_api_info(self, all_endpoints=all_endpoints)
+    for fn_index, fn in self.fns.items():
+        if not fn.fn or fn.api_name is False:
+            continue
+        entry = api_info["named_endpoints"].get(f"/{fn.api_name}")
+        if entry is not None:
+            api_info["unnamed_endpoints"][str(fn_index)] = entry
+    return api_info
+
+gr.Blocks.get_api_info = _patched_get_api_info
+
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