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/usage-dispatch.test.js

@@ -14,8 +14,9 @@ vi.mock("../../open-sse/utils/proxyFetch.js", () => ({
 const load = () => import("../../open-sse/services/usage.js");
 const SUPPORTED = [
   "github", "gemini-cli", "antigravity", "claude", "codex", "kiro",
-  "qoder", "qwen", "iflow", "ollama", "glm", "glm-cn",
-  "minimax", "minimax-cn", "vercel-ai-gateway",
+  "qoder", "iflow", "ollama", "glm", "glm-cn",
+  "minimax", "minimax-cn", "vercel-ai-gateway", "grok-cli", "kimi",
+  "deepseek",
 ];
 
 describe("usage dispatch", () => {