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/config/grokCli.js

@@ -0,0 +1,10 @@
+export const GROK_CLI_VERSION = "0.2.99";
+export const GROK_CLI_MODEL = "grok-build";
+export const GROK_CLI_BASE_URL = "https://cli-chat-proxy.grok.com/v1";
+export const GROK_CLI_CLIENT_IDENTIFIER = "grok-shell";
+export const GROK_CLI_USER_AGENT = `grok-shell/${GROK_CLI_VERSION} (linux; x86_64)`;
+
+export function supportsGrokCliReasoningEffort(model) {
+  // ponytail: unknown models omit effort until live metadata reaches dispatch.
+  return /^grok-4\.5(?:$|-)/.test(String(model || ""));
+}