chore: enforce ruff lint and format standards across backend

backend/components/kirche/form_inputs.py

@@ -18,6 +18,7 @@ upload comes later.
 from __future__ import annotations
 
 import json
+from typing import ClassVar
 
 from lfx.custom import Component
 from lfx.field_typing.range_spec import RangeSpec
@@ -51,7 +52,7 @@ class CustomInputForm(Component):
     description = "Collects structured form values into a single JSON message."
     icon = "ClipboardList"
 
-    inputs = [
+    inputs: ClassVar[list] = [
         # Plumbing, not a form field: the API posts submitted web-form
         # values as the run envelope (same {"payload": {...}} shape the
         # other kirche components use); they arrive here through a ChatInput
@@ -129,7 +130,7 @@ class CustomInputForm(Component):
             file_types=["pdf", "png", "jpg"],
         ),
     ]
-    outputs = [
+    outputs: ClassVar[list] = [
         Output(display_name="Form Data", name="form_data", method="collect"),
     ]
 
@@ -150,7 +151,7 @@ class CustomInputForm(Component):
         # Accepts the raw dict or the run envelope {"payload": {...}}.
         try:
             override = json.loads(_text(self.form_values) or "{}")
-        except Exception:
+        except json.JSONDecodeError:
             override = {}
         if isinstance(override, dict):
             if isinstance(override.get("payload"), dict):