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/providers/registry/baidu.js

@@ -0,0 +1,33 @@
+export default {
+  id: "baidu",
+  alias: "qianfan",
+  aliases: ["qianfan", "ernie", "baidu-qianfan"],
+  uiAlias: "qianfan",
+  category: "apikey",
+  authType: "apikey",
+  authModes: ["apikey"],
+  display: {
+    name: "Baidu Qianfan",
+    icon: "search",
+    color: "#2932E1",
+    textIcon: "BD",
+    website: "https://cloud.baidu.com/product/qianfan.html",
+    notice: {
+      apiKeyUrl:
+        "https://console.bce.baidu.com/qianfan/ais/console/applicationConsole/application",
+    },
+  },
+  transport: {
+    baseUrl: "https://qianfan.baidubce.com/v2/chat/completions",
+    validateUrl: "https://qianfan.baidubce.com/v2/models",
+  },
+  models: [
+    { id: "deepseek-v4-pro", name: "DeepSeek V4 Pro", contextLength: 1048576 },
+    { id: "deepseek-v4-flash", name: "DeepSeek V4 Flash", contextLength: 1048576 },
+    { id: "glm-5.2", name: "GLM 5.2", contextLength: 512000 },
+    { id: "glm-5.1", name: "GLM 5.1", contextLength: 198000 },
+    { id: "kimi-k2.6", name: "Kimi K2.6", contextLength: 262144 },
+    { id: "qwen3.5-397b-a17b", name: "Qwen 3.5 397B A17B", contextLength: 262144 },
+    { id: "qwen3.5-27b", name: "Qwen 3.5 27B", contextLength: 262144 },
+  ],
+};