Merge remote-tracking branch 'origin/master' into gitea/feature/end

Resolved conflicts taking origin/master (v0.5.55) as canonical, with local
features re-applied:
- runtime log level (LOG_LEVEL env + dashboard Settings → Logging, applied
  immediately and persisted across restarts)
- free/noAuth provider enable/disable toggle via providerStrategies.enabled
- parallel model testing (Test All Models / Test Selected Keys)

open-sse/translator/schema/blocks.js

@@ -27,6 +27,9 @@ export const RESPONSES_ITEM = {
   MESSAGE: "message",
   FUNCTION_CALL: "function_call",
   FUNCTION_CALL_OUTPUT: "function_call_output",
+  CUSTOM_TOOL_CALL: "custom_tool_call",
+  CUSTOM_TOOL_CALL_OUTPUT: "custom_tool_call_output",
+  ADDITIONAL_TOOLS: "additional_tools",
   REASONING: "reasoning",
   OUTPUT_TEXT: "output_text",
   INPUT_TEXT: "input_text",