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)

tests/unit/thinking-levels-gpt56-sol.test.js

@@ -0,0 +1,31 @@
+import { describe, it, expect } from "vitest";
+import { getThinkingLevels } from "../../open-sse/providers/thinkingLevels.js";
+
+describe("getThinkingLevels", () => {
+  it.each([
+    ["gpt-5.6-sol", ["none", "minimal", "low", "medium", "high", "xhigh", "max", "ultra"]],
+    ["gpt-5.6-terra", ["none", "minimal", "low", "medium", "high", "xhigh", "max", "ultra"]],
+    ["gpt-5.6-luna", ["none", "minimal", "low", "medium", "high", "xhigh", "max"]],
+    ["gpt-5.6-sol-review", ["none", "minimal", "low", "medium", "high", "xhigh", "max", "ultra"]],
+    ["gpt-5.6-terra-review", ["none", "minimal", "low", "medium", "high", "xhigh", "max", "ultra"]],
+    ["gpt-5.6-luna-review", ["none", "minimal", "low", "medium", "high", "xhigh", "max"]],
+  ])("returns Codex levels for %s", (model, expected) => {
+    expect(getThinkingLevels("codex", model)).toEqual(expected);
+  });
+
+  it("does not expose Codex-only GPT-5.6 overrides on Kiro", () => {
+    expect(getThinkingLevels("kiro", "gpt-5.6-sol")).toEqual([
+      "none", "minimal", "low", "medium", "high", "xhigh",
+    ]);
+  });
+
+  it("does not add max for other codex models", () => {
+    const levels = getThinkingLevels("codex", "gpt-5.3-codex");
+    expect(levels).toEqual(["low", "medium", "high", "xhigh"]);
+  });
+
+  it("does not add max for other Codex models", () => {
+    const levels = getThinkingLevels("codex", "gpt-5.5");
+    expect(levels || []).not.toContain("max");
+  });
+});